accelerator physics summary & report on uclc + lcrd r&d program alcpg04 - slac george gollin
Post on 02-Feb-2016
49 Views
Preview:
DESCRIPTION
TRANSCRIPT
-
Accelerator Physics Summary&Report on UCLC + LCRD R&D ProgramALCPG04 - SLACGeorge GollinUniversity of IllinoisJanuary 10, 2004
background image:Halbach permanent magnet quadrupole field, J. Rosenzweig, UCLA
-
OutlineStatus of UCLC, LCRD accelerator physicsOverview of UCLC and LCRD accelerator physics projects, as well as ALCPG04 accelerator physics working group presentationsbeam dynamics & simulationdamping ringssystems & instrumentationrf & accelerating structuresbeam delivery & IRsources
Profiles of requested funding
ALCPG04 Accelerator R&D summary
-
Brief UCLC + LCRD historyAt UC Santa Cruz (July, 2002): DOE, NSF declared $400k, $500k as accelerator funding goals.USLCSG organized schedule for proposal submisxsion and review A University Program of Accelerator and Detector Research for the Linear Collider ( Big Document) sent to DOE, NSF October 24, 2002. 33 accelerator, 38 detector proposals, 47 universities, 6 labs, 297 authors, 545 pages.accelerator support requests: $625k LCRD, $379k UCLCProfiles of requested funding
background image: copies of Big Doc on its way to Washington
-
The startup has been bumpyProfiles of requested funding
ALCPG04 Accelerator R&D summary
-
Starting up; renewal proposalsProfiles of requested funding
Most groups have started their projects, in spite of budget glitches.Renewal/resubmission: autumn, 2003.A University Program of Accelerator and Detector Research for the Linear Collider, volume II sent to DOE, NSF November 24, 2003. 29 accelerator, 39 detector proposals, 48 universities, 5 labs, 303 authors, 622 pages.FY04 accelerator support requests: $772k LCRD, $380k UCLCbackground image: Big Doc author list
-
Proposal reviews this yearProfiles of requested funding
December, 2003 reviews of UCLC, LCRD projects:Norbert Holtkamp (ORNL) chaired the accelerator reviewHoward Gordon (BNL) chaired the detector review.Detector review procedures were adjusted so that reports from the Gordon Committee could be used by DOE to make funding decisions.DOE chose not to do this with the Holtkamp Committee. There will be another round of reviews required before funding can be provided.Will there be funding? Well see.
ALCPG04 Accelerator R&D summary
-
UCLC + LCRD FundingProfiles of requested funding
HEPAP says LC is important. DOE/NSF need to find ways to support LC work.Engagement of (university) community is essential. Support from DOE/NSF is necessary to show its really worth our time to put aside some of our other activities to do LC work
FY03 requestFY03 awardFY04 requestFY05 requestFY06 requestLCRD$575k(21 proposals)$400k(6 of 21 rejected)$772k(17 proposals)$871k(17 proposals)$713k(17 proposals)UCLC$379k(12 proposals)???$380k(12 proposals)$757k(12 proposals)$889k(12 proposals)
ALCPG04 Accelerator R&D summary
-
A survey of accelerator R&D: UCLC, LCRD, and ALCPG04background image: acoustic wave in copper simulation
-
Beam Dynamics and Simulation
simulation of beam dynamicsrf cavity dark current simulationdamping ring electron cloud modeldeveloping better software toolsmodeling machine reliability
ALCPG04 Accelerator R&D summary
-
ALCPG04 accelerator WG sessions
ALCPG04 Accelerator R&D summary
-
Beam simulation and general calculations(6 LCRD + UCLC projects)LCRD 2.27: Effects of Coherent Synchrotron Radiation in Linear Collider Systems (James Ellison)UCLC 2.29: Improved simulation codes and diagnostics for high-brightness electron beams (Court Bohn)UCLC 2.30: Beam simulation: main beam transport in the linacs and beam delivery systems, beam halo modeling and transport, and spin transport (Dave Rubin)UCLC 2.32: Damping ring studies for the LC (Sekazi Mtingwa)LCRD 2.33: A Compact Wakefield Measurement Facility (Young-Kee Kim)UCLC 2.34: Experimental, simulation, and design studies for linear collider damping rings (Joe Rogers)
ALCPG04 Accelerator R&D summary
-
Gabriele Bassi : A Simplified Method to Compute Single-Pass Coherent Synchrotron Radiation with Shielding (LCRD progress report) LCRD 2.27: funded FY03, $20k. Funds arrived too late to support a new student, but (analytic) calculations are ongoing. 2D spacetime Greens function; method-of-images shielding.Benchmark system: magnetic chicane for bunch compressor coming from a bunch with a linear chirp,evolving only in repsonse to fields of dipoles.next step: self-consistent of the charge distribution allowing the distribution to be affected by CSR.
ALCPG04 Accelerator R&D summary
-
Progress Report on UCLC Simulations at Cornell Presenter: David SaganUCLC 2.30: Beam simulation: main beam transport in the linacs and beam delivery systems, beam halo modeling and transport, and spin transport(Dave Rubin et al.)
ALCPG04 Accelerator R&D summary
-
Macroparticle tracking implemented- Full 6 x 6 sigma matrices- Ability to track through bendsLCavity element with wakefields implemented. XSIF (Extended Standard Input Format) parser implemented.I_Beam element implemented*Initial comparison with LIAR shows agreement.Recent ProgressBmad has been extended for LINAC simulation:Other progress:Bmad Documentation [http://www.lepp.cornell.edu/~dcs].Fortran to C structure conversion standard (Fortran2003).David Sagan
ALCPG04 Accelerator R&D summary
-
Tor Raubenheimer : Critical Issues in Beam Dynamics for the Linear Collider Sources, especially e+: target damage, yield, polarizationDamping rings: lots of accelerator physics. Large sensitivity of downstream systems to fluctuations in DR behavior.Low emittance transport: DR to IP. Both designs have ~100% dilution. IR and backgrounds: feedback, collimators and masking,Need to study details of design performanceMany tools have been developed or are under development but new tools neededGoal: DR IP DR simulation
ALCPG04 Accelerator R&D summary
-
Andy Wolski : Collective Effects in Damping Rings
ALCPG04 Accelerator R&D summary
-
Andy Wolski : Collective Effects in Damping Rings
ALCPG04 Accelerator R&D summary
-
John Power: Compact Wakefield Facility (LCRD 2.33 progress report)
A dedicated facility for high-resolution wakefield measurements of NLC structures. Work needed:A 20 MeV, high-brightness, Drive Beam excites wakefieldA 5 MeV Witness Beam probes the wakefieldDownstream Optics measures the witness beam deflection
ALCPG04 Accelerator R&D summary
-
Armen Apyan: Beam Simulation Efforts at Northwestern-ICAR Analytic solution techniques for various lattice studies in LC (CLIC) designmodeling techniques which hunt for solutions in parameter space can get lost; they need good starting points in order to find the right solution. There is virtue in analytic techniques.working on designs for turn around loop for CLIC.results are checked with MAD simulation
ALCPG04 Accelerator R&D summary
-
Valentin Ivanov: Dark Current Simulation for Linear Collider Structure R&DDark current simulation code includes particle tracking in E, B fieldshas modeling of thermal emission, field emission, secondary emissionfilling of realistic NLC cavities and structures are modeled. (Cool animations!)
ALCPG04 Accelerator R&D summary
-
Benchmarking Particle TrajectoriesComparing 2D and 3D models G = 50 MV/mG = 100 MV/m
ALCPG04 Accelerator R&D summary
-
Modeling Single Cell Experiment Track3P
ALCPG04 Accelerator R&D summary
Chart2
0
0
0.0000000006
0.000000069
0.000000114
0.0000002852
0.0000001253
0.0000001194
0.0000001094
0.0000001148
0.0000000874
0.0000000859
0.0000000953
0.0000001114
0.0000000979
0.0000000721
0.0000000545
0.0000000527
0.0000000472
0.0000000795
0.0000002044
0.000000135
0.0000000882
0.0000000912
0.000000093
0.0000001025
0.0000001061
0.0000000896
0.000000042
0.0000000382
0.0000000173
0.0000000072
0.0000000093
0.0000000076
0.0000000032
0.000000004
0.0000000047
0.0000000038
0.0000000039
0.0000000038
0.0000000018
0.0000000016
0.000000002
0.0000000009
0.0000000004
0.0000000015
0.0000000004
0.0000000005
0.0000000009
0.0000000005
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
E, eV
N
X-ray Spectrum, P=25 MW
Sheet1
E, eVN (25MW)I, AE, eVN (50MW)E, eVNE, eVI,A
1.00E+040.00E+001.00E+040.00E+001.00E+040.00E+001.00E+040.00E+001.00E+040.00E+00
3.00E+042.72E-163.00E+040.00E+003.00E+046.48E-153.00E+041.95E-143.00E+040.00E+00
5.00E+045.69E-105.00E+040.00E+005.00E+045.90E-085.00E+041.39E-075.00E+040.00E+00
7.00E+046.90E-087.00E+040.00E+007.00E+044.71E-067.00E+046.79E-067.00E+040.00E+00
9.00E+041.14E-079.00E+040.00E+009.00E+041.27E-059.00E+042.08E-059.00E+040.00E+00
1.10E+052.85E-071.10E+050.00E+001.10E+052.28E-051.10E+053.26E-051.10E+050.00E+00
1.30E+051.25E-071.30E+050.00E+001.30E+054.05E-051.30E+054.52E-051.30E+050.00E+00
1.50E+051.19E-071.50E+050.00E+001.50E+057.22E-051.50E+056.78E-051.50E+050.00E+00
1.70E+051.09E-071.70E+050.00E+001.70E+059.20E-051.70E+055.26E-051.70E+050.00E+00
1.90E+051.15E-071.90E+050.00E+001.90E+059.00E-051.90E+054.56E-051.90E+050.00E+00
2.10E+058.74E-082.10E+050.00E+002.10E+058.58E-052.10E+054.17E-052.10E+050.00E+00
2.30E+058.59E-082.30E+050.00E+002.30E+055.95E-052.30E+053.90E-052.30E+050.00E+00
2.50E+059.53E-082.50E+050.00E+002.50E+056.18E-052.50E+054.51E-052.50E+050.00E+00
2.70E+051.11E-072.70E+050.00E+002.70E+055.54E-052.70E+053.68E-052.70E+050.00E+00
2.90E+059.79E-082.90E+050.00E+002.90E+054.15E-052.90E+052.98E-052.90E+050.00E+00
3.10E+057.21E-083.10E+050.00E+003.10E+052.40E-053.10E+052.70E-053.10E+050.00E+00
3.30E+055.45E-083.30E+050.00E+003.30E+051.05E-053.30E+052.50E-053.30E+050.00E+00
3.50E+055.27E-083.50E+050.00E+003.50E+051.05E-053.50E+052.56E-053.50E+050.00E+00
3.70E+054.72E-083.70E+050.00E+003.70E+051.74E-053.70E+052.46E-053.70E+050.00E+00
3.90E+057.95E-083.90E+050.00E+003.90E+051.66E-053.90E+052.32E-053.90E+050.00E+00
4.10E+052.04E-074.10E+050.00E+004.10E+051.58E-054.10E+052.63E-054.10E+050.00E+00
4.30E+051.35E-074.30E+050.00E+004.30E+051.60E-054.30E+052.40E-054.30E+050.00E+00
4.50E+058.82E-084.50E+050.00E+004.50E+051.51E-054.50E+052.39E-054.50E+050.00E+00
4.70E+059.12E-084.70E+050.00E+004.70E+051.54E-054.70E+052.10E-054.70E+050.00E+00
4.90E+059.30E-084.90E+050.00E+004.90E+051.28E-054.90E+051.38E-054.90E+050.00E+00
5.10E+051.02E-075.10E+051.72E-075.10E+051.27E-055.10E+051.23E-055.10E+055.46E-06
5.30E+051.06E-075.30E+051.94E-065.30E+051.33E-055.30E+051.08E-055.30E+053.38E-05
5.50E+058.96E-085.50E+054.07E-065.50E+051.26E-055.50E+059.72E-065.50E+051.44E-04
5.70E+054.20E-085.70E+053.59E-065.70E+051.14E-055.70E+059.93E-065.70E+053.19E-04
5.90E+053.82E-085.90E+053.14E-065.90E+051.15E-055.90E+059.02E-065.90E+052.31E-04
6.10E+051.73E-086.10E+051.96E-066.10E+059.56E-066.10E+057.82E-066.10E+051.34E-04
6.30E+057.25E-096.30E+057.53E-076.30E+058.95E-066.30E+056.92E-066.30E+051.38E-04
6.50E+059.29E-096.50E+053.79E-076.50E+057.02E-066.50E+054.62E-066.50E+051.66E-04
6.70E+057.56E-096.70E+053.10E-076.70E+057.49E-066.70E+053.44E-066.70E+052.21E-04
6.90E+053.21E-096.90E+052.36E-076.90E+057.61E-066.90E+053.15E-066.90E+051.97E-04
7.10E+054.02E-097.10E+052.05E-077.10E+055.64E-067.10E+052.84E-067.10E+051.93E-04
7.30E+054.67E-097.30E+051.64E-077.30E+053.77E-067.30E+052.42E-067.30E+051.32E-04
7.50E+053.78E-097.50E+051.70E-077.50E+053.47E-067.50E+052.10E-067.50E+051.15E-04
7.70E+053.95E-097.70E+051.88E-077.70E+053.25E-067.70E+051.96E-067.70E+051.07E-04
7.90E+053.78E-097.90E+051.71E-077.90E+052.78E-067.90E+051.88E-067.90E+058.97E-05
8.10E+051.78E-098.10E+051.47E-078.10E+052.36E-068.10E+051.70E-068.10E+055.34E-05
8.30E+051.59E-098.30E+051.06E-078.30E+052.22E-068.30E+051.38E-068.30E+052.36E-05
8.50E+051.96E-098.50E+058.32E-088.50E+052.20E-068.50E+051.18E-068.50E+051.68E-05
8.70E+059.12E-108.70E+059.19E-088.70E+052.27E-068.70E+051.08E-068.70E+051.92E-05
8.90E+054.15E-108.90E+056.45E-088.90E+051.36E-068.90E+051.12E-068.90E+052.93E-05
9.10E+051.50E-099.10E+052.51E-079.10E+051.36E-069.10E+051.23E-069.10E+052.40E-05
9.30E+054.07E-109.30E+052.63E-079.30E+051.00E-069.30E+051.05E-069.30E+052.46E-05
9.50E+054.99E-109.50E+051.64E-079.50E+057.47E-079.50E+058.72E-079.50E+052.32E-05
9.70E+059.06E-109.70E+059.95E-089.70E+056.88E-079.70E+056.41E-079.70E+052.24E-05
9.90E+054.62E-109.90E+051.57E-079.90E+056.78E-079.90E+056.64E-079.90E+052.10E-05
1.01E+069.08E-231.01E+061.31E-071.01E+061.07E-191.01E+066.86E-201.01E+061.82E-05
1.03E+061.72E-221.03E+061.49E-071.03E+061.08E-191.03E+065.60E-201.03E+061.91E-05
1.05E+061.21E-221.05E+061.59E-071.05E+061.15E-191.05E+068.74E-201.05E+061.90E-05
1.07E+067.29E-231.07E+068.54E-081.07E+061.17E-191.07E+061.29E-191.07E+061.69E-05
1.09E+066.04E-231.09E+065.64E-081.09E+061.06E-191.09E+064.69E-201.09E+061.64E-05
1.11E+061.02E-221.11E+064.40E-081.11E+061.27E-191.11E+064.76E-201.11E+061.49E-05
1.13E+069.98E-231.13E+061.40E-081.13E+069.52E-201.13E+062.54E-201.13E+061.27E-05
1.15E+064.50E-231.15E+061.21E-081.15E+066.98E-201.15E+063.48E-201.15E+061.11E-05
1.17E+069.47E-231.17E+061.07E-081.17E+068.41E-201.17E+065.70E-201.17E+069.99E-06
1.19E+069.98E-241.19E+067.57E-091.19E+066.77E-201.19E+063.44E-201.19E+061.02E-05
1.21E+067.56E-231.21E+065.08E-091.21E+065.23E-201.21E+064.00E-201.21E+061.08E-05
1.23E+061.35E-221.23E+065.28E-091.23E+063.78E-201.23E+066.43E-201.23E+065.24E-06
1.25E+068.42E-241.25E+066.36E-091.25E+065.40E-201.25E+063.87E-201.25E+065.07E-06
1.27E+065.00E-241.27E+065.22E-091.27E+063.13E-201.27E+063.97E-201.27E+064.67E-06
1.29E+061.57E-241.29E+066.88E-091.29E+064.72E-201.29E+062.91E-201.29E+064.09E-06
1.31E+064.63E-241.31E+061.41E-091.31E+065.37E-201.31E+068.95E-211.31E+063.31E-06
1.33E+062.95E-231.33E+061.72E-091.33E+067.08E-201.33E+062.06E-201.33E+063.09E-06
1.35E+061.20E-241.35E+062.51E-091.35E+065.56E-201.35E+061.68E-201.35E+063.06E-06
1.37E+061.49E-231.37E+062.72E-091.37E+062.90E-201.37E+061.52E-201.37E+062.82E-06
1.39E+066.43E-241.39E+069.99E-101.39E+063.55E-201.39E+061.96E-201.39E+062.70E-06
1.41E+068.01E-251.41E+061.67E-101.41E+063.51E-201.41E+062.79E-201.41E+061.76E-06
1.43E+064.22E-251.43E+062.06E-091.43E+063.72E-201.43E+061.88E-201.43E+061.66E-06
1.45E+064.90E-231.45E+068.44E-101.45E+062.43E-201.45E+062.14E-201.45E+061.04E-06
1.47E+067.72E-241.47E+068.35E-101.47E+061.86E-201.47E+061.54E-201.47E+069.08E-07
1.49E+062.14E-281.49E+067.68E-101.49E+067.59E-211.49E+062.29E-201.49E+061.05E-06
1.51E+061.83E-271.51E+067.13E-101.51E+061.16E-201.51E+061.20E-201.51E+066.80E-07
1.53E+063.48E-231.53E+067.60E-101.53E+065.82E-211.53E+061.53E-201.53E+066.36E-07
1.55E+061.93E-231.55E+065.85E-101.55E+069.19E-211.55E+066.59E-211.55E+066.96E-07
1.57E+061.84E-251.57E+069.75E-101.57E+069.71E-211.57E+061.43E-201.57E+067.94E-07
1.59E+065.99E-241.59E+062.74E-101.59E+069.76E-211.59E+061.03E-201.59E+066.19E-07
1.61E+064.66E-281.61E+067.76E-101.61E+067.71E-211.61E+066.91E-211.61E+066.65E-07
1.63E+061.27E-271.63E+062.16E-101.63E+066.04E-211.63E+064.25E-211.63E+068.07E-07
1.65E+062.76E-241.65E+067.67E-101.65E+065.60E-211.65E+063.55E-211.65E+065.03E-07
1.67E+061.38E-261.67E+068.57E-111.67E+063.22E-211.67E+064.72E-211.67E+064.30E-07
1.69E+064.91E-261.69E+066.01E-101.69E+062.76E-211.69E+062.46E-211.69E+065.20E-07
1.71E+062.34E-301.71E+063.90E-101.71E+062.29E-211.71E+061.09E-201.71E+064.22E-07
1.73E+063.15E-271.73E+061.47E-101.73E+062.91E-211.73E+061.19E-201.73E+062.56E-07
1.75E+068.63E-281.75E+068.62E-101.75E+062.46E-211.75E+063.84E-211.75E+062.86E-07
1.77E+061.06E-241.77E+063.32E-111.77E+062.19E-211.77E+064.29E-221.77E+062.90E-07
1.79E+063.25E-281.79E+061.36E-111.79E+062.41E-211.79E+061.56E-211.79E+061.68E-07
1.81E+064.74E-271.81E+069.57E-121.81E+069.49E-221.81E+065.54E-211.81E+063.25E-07
1.83E+061.56E-261.83E+061.26E-101.83E+061.92E-211.83E+065.58E-221.83E+064.12E-07
1.85E+063.50E-341.85E+068.68E-111.85E+061.30E-211.85E+062.17E-221.85E+064.30E-07
1.87E+062.13E-271.87E+067.43E-121.87E+061.20E-211.87E+065.10E-211.87E+062.55E-07
1.89E+061.08E-271.89E+069.32E-111.89E+061.40E-211.89E+062.22E-211.89E+061.45E-07
1.91E+062.04E-271.91E+064.25E-111.91E+061.43E-211.91E+061.09E-211.91E+062.56E-07
1.93E+062.51E-421.93E+065.26E-121.93E+061.51E-211.93E+062.89E-221.93E+062.07E-07
1.95E+060.00E+001.95E+063.06E-101.95E+064.32E-221.95E+060.00E+001.95E+062.47E-07
1.97E+061.31E-281.97E+066.98E-121.97E+062.72E-221.97E+062.48E-221.97E+061.20E-07
1.99E+069.15E-301.99E+064.12E-111.99E+067.92E-221.99E+063.73E-221.99E+068.16E-08
Sheet1
E, eV
N
X-ray Spectrum, P=25 MW
Sheet2
E, eV
I, A
Particle Spectrum, P=25 MW
Sheet3
0.ns
0.2ns
E, eV
N
X-ray Spectrum, P=50MW
E, eV
N
X-ray Spectrum, P=50MW
E, eV
I, A
Particles Spectrum, P=50 MW
Chart1
0
0
0.000000059
0.0000047108
0.000012674
0.0000227605
0.0000404897
0.0000722138
0.0000920215
0.0000899902
0.000085812
0.0000595024
0.0000618352
0.000055379
0.0000414961
0.0000239881
0.000010498
0.0000105446
0.0000173626
0.0000165895
0.0000158047
0.0000160475
0.0000151121
0.0000153803
0.0000127972
0.0000127368
0.0000132993
0.0000126354
0.0000113958
0.0000114689
0.0000095598
0.0000089514
0.0000070169
0.000007488
0.00000761
0.0000056396
0.0000037685
0.0000034691
0.0000032456
0.0000027828
0.0000023643
0.0000022195
0.0000021972
0.0000022745
0.0000013575
0.0000013589
0.0000010045
0.0000007468
0.0000006877
0.0000006778
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
E, eV
N
X-ray Spectrum, P=50MW
Sheet1
E, eVN (25MW)I, AE, eVN (50MW)E, eVNE, eVI,A
1.00E+040.00E+001.00E+040.00E+001.00E+040.00E+001.00E+040.00E+001.00E+040.00E+00
3.00E+042.72E-163.00E+040.00E+003.00E+046.48E-153.00E+041.95E-143.00E+040.00E+00
5.00E+045.69E-105.00E+040.00E+005.00E+045.90E-085.00E+041.39E-075.00E+040.00E+00
7.00E+046.90E-087.00E+040.00E+007.00E+044.71E-067.00E+046.79E-067.00E+040.00E+00
9.00E+041.14E-079.00E+040.00E+009.00E+041.27E-059.00E+042.08E-059.00E+040.00E+00
1.10E+052.85E-071.10E+050.00E+001.10E+052.28E-051.10E+053.26E-051.10E+050.00E+00
1.30E+051.25E-071.30E+050.00E+001.30E+054.05E-051.30E+054.52E-051.30E+050.00E+00
1.50E+051.19E-071.50E+050.00E+001.50E+057.22E-051.50E+056.78E-051.50E+050.00E+00
1.70E+051.09E-071.70E+050.00E+001.70E+059.20E-051.70E+055.26E-051.70E+050.00E+00
1.90E+051.15E-071.90E+050.00E+001.90E+059.00E-051.90E+054.56E-051.90E+050.00E+00
2.10E+058.74E-082.10E+050.00E+002.10E+058.58E-052.10E+054.17E-052.10E+050.00E+00
2.30E+058.59E-082.30E+050.00E+002.30E+055.95E-052.30E+053.90E-052.30E+050.00E+00
2.50E+059.53E-082.50E+050.00E+002.50E+056.18E-052.50E+054.51E-052.50E+050.00E+00
2.70E+051.11E-072.70E+050.00E+002.70E+055.54E-052.70E+053.68E-052.70E+050.00E+00
2.90E+059.79E-082.90E+050.00E+002.90E+054.15E-052.90E+052.98E-052.90E+050.00E+00
3.10E+057.21E-083.10E+050.00E+003.10E+052.40E-053.10E+052.70E-053.10E+050.00E+00
3.30E+055.45E-083.30E+050.00E+003.30E+051.05E-053.30E+052.50E-053.30E+050.00E+00
3.50E+055.27E-083.50E+050.00E+003.50E+051.05E-053.50E+052.56E-053.50E+050.00E+00
3.70E+054.72E-083.70E+050.00E+003.70E+051.74E-053.70E+052.46E-053.70E+050.00E+00
3.90E+057.95E-083.90E+050.00E+003.90E+051.66E-053.90E+052.32E-053.90E+050.00E+00
4.10E+052.04E-074.10E+050.00E+004.10E+051.58E-054.10E+052.63E-054.10E+050.00E+00
4.30E+051.35E-074.30E+050.00E+004.30E+051.60E-054.30E+052.40E-054.30E+050.00E+00
4.50E+058.82E-084.50E+050.00E+004.50E+051.51E-054.50E+052.39E-054.50E+050.00E+00
4.70E+059.12E-084.70E+050.00E+004.70E+051.54E-054.70E+052.10E-054.70E+050.00E+00
4.90E+059.30E-084.90E+050.00E+004.90E+051.28E-054.90E+051.38E-054.90E+050.00E+00
5.10E+051.02E-075.10E+051.72E-075.10E+051.27E-055.10E+051.23E-055.10E+055.46E-06
5.30E+051.06E-075.30E+051.94E-065.30E+051.33E-055.30E+051.08E-055.30E+053.38E-05
5.50E+058.96E-085.50E+054.07E-065.50E+051.26E-055.50E+059.72E-065.50E+051.44E-04
5.70E+054.20E-085.70E+053.59E-065.70E+051.14E-055.70E+059.93E-065.70E+053.19E-04
5.90E+053.82E-085.90E+053.14E-065.90E+051.15E-055.90E+059.02E-065.90E+052.31E-04
6.10E+051.73E-086.10E+051.96E-066.10E+059.56E-066.10E+057.82E-066.10E+051.34E-04
6.30E+057.25E-096.30E+057.53E-076.30E+058.95E-066.30E+056.92E-066.30E+051.38E-04
6.50E+059.29E-096.50E+053.79E-076.50E+057.02E-066.50E+054.62E-066.50E+051.66E-04
6.70E+057.56E-096.70E+053.10E-076.70E+057.49E-066.70E+053.44E-066.70E+052.21E-04
6.90E+053.21E-096.90E+052.36E-076.90E+057.61E-066.90E+053.15E-066.90E+051.97E-04
7.10E+054.02E-097.10E+052.05E-077.10E+055.64E-067.10E+052.84E-067.10E+051.93E-04
7.30E+054.67E-097.30E+051.64E-077.30E+053.77E-067.30E+052.42E-067.30E+051.32E-04
7.50E+053.78E-097.50E+051.70E-077.50E+053.47E-067.50E+052.10E-067.50E+051.15E-04
7.70E+053.95E-097.70E+051.88E-077.70E+053.25E-067.70E+051.96E-067.70E+051.07E-04
7.90E+053.78E-097.90E+051.71E-077.90E+052.78E-067.90E+051.88E-067.90E+058.97E-05
8.10E+051.78E-098.10E+051.47E-078.10E+052.36E-068.10E+051.70E-068.10E+055.34E-05
8.30E+051.59E-098.30E+051.06E-078.30E+052.22E-068.30E+051.38E-068.30E+052.36E-05
8.50E+051.96E-098.50E+058.32E-088.50E+052.20E-068.50E+051.18E-068.50E+051.68E-05
8.70E+059.12E-108.70E+059.19E-088.70E+052.27E-068.70E+051.08E-068.70E+051.92E-05
8.90E+054.15E-108.90E+056.45E-088.90E+051.36E-068.90E+051.12E-068.90E+052.93E-05
9.10E+051.50E-099.10E+052.51E-079.10E+051.36E-069.10E+051.23E-069.10E+052.40E-05
9.30E+054.07E-109.30E+052.63E-079.30E+051.00E-069.30E+051.05E-069.30E+052.46E-05
9.50E+054.99E-109.50E+051.64E-079.50E+057.47E-079.50E+058.72E-079.50E+052.32E-05
9.70E+059.06E-109.70E+059.95E-089.70E+056.88E-079.70E+056.41E-079.70E+052.24E-05
9.90E+054.62E-109.90E+051.57E-079.90E+056.78E-079.90E+056.64E-079.90E+052.10E-05
1.01E+069.08E-231.01E+061.31E-071.01E+061.07E-191.01E+066.86E-201.01E+061.82E-05
1.03E+061.72E-221.03E+061.49E-071.03E+061.08E-191.03E+065.60E-201.03E+061.91E-05
1.05E+061.21E-221.05E+061.59E-071.05E+061.15E-191.05E+068.74E-201.05E+061.90E-05
1.07E+067.29E-231.07E+068.54E-081.07E+061.17E-191.07E+061.29E-191.07E+061.69E-05
1.09E+066.04E-231.09E+065.64E-081.09E+061.06E-191.09E+064.69E-201.09E+061.64E-05
1.11E+061.02E-221.11E+064.40E-081.11E+061.27E-191.11E+064.76E-201.11E+061.49E-05
1.13E+069.98E-231.13E+061.40E-081.13E+069.52E-201.13E+062.54E-201.13E+061.27E-05
1.15E+064.50E-231.15E+061.21E-081.15E+066.98E-201.15E+063.48E-201.15E+061.11E-05
1.17E+069.47E-231.17E+061.07E-081.17E+068.41E-201.17E+065.70E-201.17E+069.99E-06
1.19E+069.98E-241.19E+067.57E-091.19E+066.77E-201.19E+063.44E-201.19E+061.02E-05
1.21E+067.56E-231.21E+065.08E-091.21E+065.23E-201.21E+064.00E-201.21E+061.08E-05
1.23E+061.35E-221.23E+065.28E-091.23E+063.78E-201.23E+066.43E-201.23E+065.24E-06
1.25E+068.42E-241.25E+066.36E-091.25E+065.40E-201.25E+063.87E-201.25E+065.07E-06
1.27E+065.00E-241.27E+065.22E-091.27E+063.13E-201.27E+063.97E-201.27E+064.67E-06
1.29E+061.57E-241.29E+066.88E-091.29E+064.72E-201.29E+062.91E-201.29E+064.09E-06
1.31E+064.63E-241.31E+061.41E-091.31E+065.37E-201.31E+068.95E-211.31E+063.31E-06
1.33E+062.95E-231.33E+061.72E-091.33E+067.08E-201.33E+062.06E-201.33E+063.09E-06
1.35E+061.20E-241.35E+062.51E-091.35E+065.56E-201.35E+061.68E-201.35E+063.06E-06
1.37E+061.49E-231.37E+062.72E-091.37E+062.90E-201.37E+061.52E-201.37E+062.82E-06
1.39E+066.43E-241.39E+069.99E-101.39E+063.55E-201.39E+061.96E-201.39E+062.70E-06
1.41E+068.01E-251.41E+061.67E-101.41E+063.51E-201.41E+062.79E-201.41E+061.76E-06
1.43E+064.22E-251.43E+062.06E-091.43E+063.72E-201.43E+061.88E-201.43E+061.66E-06
1.45E+064.90E-231.45E+068.44E-101.45E+062.43E-201.45E+062.14E-201.45E+061.04E-06
1.47E+067.72E-241.47E+068.35E-101.47E+061.86E-201.47E+061.54E-201.47E+069.08E-07
1.49E+062.14E-281.49E+067.68E-101.49E+067.59E-211.49E+062.29E-201.49E+061.05E-06
1.51E+061.83E-271.51E+067.13E-101.51E+061.16E-201.51E+061.20E-201.51E+066.80E-07
1.53E+063.48E-231.53E+067.60E-101.53E+065.82E-211.53E+061.53E-201.53E+066.36E-07
1.55E+061.93E-231.55E+065.85E-101.55E+069.19E-211.55E+066.59E-211.55E+066.96E-07
1.57E+061.84E-251.57E+069.75E-101.57E+069.71E-211.57E+061.43E-201.57E+067.94E-07
1.59E+065.99E-241.59E+062.74E-101.59E+069.76E-211.59E+061.03E-201.59E+066.19E-07
1.61E+064.66E-281.61E+067.76E-101.61E+067.71E-211.61E+066.91E-211.61E+066.65E-07
1.63E+061.27E-271.63E+062.16E-101.63E+066.04E-211.63E+064.25E-211.63E+068.07E-07
1.65E+062.76E-241.65E+067.67E-101.65E+065.60E-211.65E+063.55E-211.65E+065.03E-07
1.67E+061.38E-261.67E+068.57E-111.67E+063.22E-211.67E+064.72E-211.67E+064.30E-07
1.69E+064.91E-261.69E+066.01E-101.69E+062.76E-211.69E+062.46E-211.69E+065.20E-07
1.71E+062.34E-301.71E+063.90E-101.71E+062.29E-211.71E+061.09E-201.71E+064.22E-07
1.73E+063.15E-271.73E+061.47E-101.73E+062.91E-211.73E+061.19E-201.73E+062.56E-07
1.75E+068.63E-281.75E+068.62E-101.75E+062.46E-211.75E+063.84E-211.75E+062.86E-07
1.77E+061.06E-241.77E+063.32E-111.77E+062.19E-211.77E+064.29E-221.77E+062.90E-07
1.79E+063.25E-281.79E+061.36E-111.79E+062.41E-211.79E+061.56E-211.79E+061.68E-07
1.81E+064.74E-271.81E+069.57E-121.81E+069.49E-221.81E+065.54E-211.81E+063.25E-07
1.83E+061.56E-261.83E+061.26E-101.83E+061.92E-211.83E+065.58E-221.83E+064.12E-07
1.85E+063.50E-341.85E+068.68E-111.85E+061.30E-211.85E+062.17E-221.85E+064.30E-07
1.87E+062.13E-271.87E+067.43E-121.87E+061.20E-211.87E+065.10E-211.87E+062.55E-07
1.89E+061.08E-271.89E+069.32E-111.89E+061.40E-211.89E+062.22E-211.89E+061.45E-07
1.91E+062.04E-271.91E+064.25E-111.91E+061.43E-211.91E+061.09E-211.91E+062.56E-07
1.93E+062.51E-421.93E+065.26E-121.93E+061.51E-211.93E+062.89E-221.93E+062.07E-07
1.95E+060.00E+001.95E+063.06E-101.95E+064.32E-221.95E+060.00E+001.95E+062.47E-07
1.97E+061.31E-281.97E+066.98E-121.97E+062.72E-221.97E+062.48E-221.97E+061.20E-07
1.99E+069.15E-301.99E+064.12E-111.99E+067.92E-221.99E+063.73E-221.99E+068.16E-08
Sheet1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
E, eV
N
X-ray Spectrum, P=25 MW
Sheet2
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
E, eV
I, A
Particle Spectrum, P=25 MW
Sheet3
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
0.ns
0.2ns
E, eV
N
X-ray Spectrum, P=50MW
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
E, eV
N
X-ray Spectrum, P=50MW
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
E, eV
I, A
Particles Spectrum, P=50 MW
-
Mauro Pivi : Electron Cloud in the NLC and TESLA a problem for LC damping ringsdevelopment of detailed models for electron cloud in progressinvestigation of methods to reduce secondary emission underway
ALCPG04 Accelerator R&D summary
-
Peter Tenbaum: Collimator WakefieldsBeam which passes off-axis though collimator jaws gets a transverse kickCollimator Wakefields likely to play important role in dynamics of beam delivery systemWith tail-folding octupoles, theory says present designs OKWithout tail-folding octupoles, present design is marginal to unacceptableTheoretical estimates of wake kicks not yet at acceptable level
ALCPG04 Accelerator R&D summary
-
Peter Tenenbaum, LC simulation tools
ALCPG04 Accelerator R&D summary
-
LC availability Simulation done for the LC comparison task forceTom HimelWarm DR+Linac, downtime by system
See Toms talk for the subtleties and caveats.
ALCPG04 Accelerator R&D summary
-
Damping RingsKickersPermanent Magnets
ALCPG04 Accelerator R&D summary
-
ALCPG04 accelerator WG sessions
ALCPG04 Accelerator R&D summary
-
Kickers, magnets, mechanical support systems (4)LCRD 2.22: Investigation of Novel Schemes for Injection/Extraction Kickers (George Gollin)LCRD 2.23: Ring-tuned, permanent magnet-based Halbach quadrupole (James Rosenzweig)UCLC 2.25: Investigation and prototyping of fast kicker options for the TESLA damping rings (Gerry Dugan)LCRD 2.26: Continuing Research and Development of Linac and Final Doublet Girder Movers (David Warner)
ALCPG04 Accelerator R&D summary
-
Injection/extraction from trailing edge of a train (J. Rogers) Advantages: Bunches are always extracted and injected at the end of a bunch train, so the injection/extraction kickers need only have a fast rise time. The damping ring can be much smaller than the dogbone design. Positron bunch production rate is greatly reduced, allowing use of a conventional positron source.Disadvantage:An additional small ring is required.UCLC 2.34 progress: simulations, as well as CESR-c machine studies concerning damping ring issues. Some novel designs for damping rings being considered.
ALCPG04 Accelerator R&D summary
-
Injection/extraction from trailing edge of a trainSimplified timing example: 3 trains of 3 bunchesJoe Rogers
ALCPG04 Accelerator R&D summary
-
LCRD 2.22: Investigation of Novel Schemes for Injection/Extraction Kickers (George Gollin)LCRD 2.22: rejected by DOE in FY03. Were working on it anyway. We have a configuration with which unkicked bunches experience both zero pT and zero dpT/dt.
-
LCRD 2.23: Ring-tuned, permanent magnet-based Halbach quadrupole (James Rosenzweig)LCRD 2.23: funded FY03, $35k. Good progress, both in modeling and in fabrication of prototypes for studies.
ALCPG04 Accelerator R&D summary
-
Long Range Planning at Fermilab Fermilab is going through long range planning. There are two accelerator projects that are being considered: Proton Drive (A high intensity Proton machine at 8 GeV) Linear Collider Commitment and leadership at the highest levels of Fermilab management to establish Fermilab as the preferred host. Develop Fermilab capability to provide technical leadership on the LC construction project.Engagement in the critical accelerator technology issues and demonstration project(s). Suggest identifying a limited number (two) of areas in which to concentrate accelerator physics effort with goal of establishing leadership, e.g.Damping ringMain linacShekhar Mishra
-
Thoughts on the Scope of ETF It must be done with International collaboration. It should have the capability to do perform beam studies. ETF could be 1% demonstration machine for the technology chosen by ITRP. It could have an Injector, Linac (5 GeV), Damping Ring, post damping ring Linac (~0.5 GeV) It could be a development facility for the Instrumentation, controls etc needed for the LC. It could be a development facility for one of a kind device. It could be used for industrialization/ later testing of the major component.Shekhar Mishra
-
Systems & Instrumentationbeam position/size monitorsactive collimatorsbeam loss, rf, ground motion monitorscontrol systems
ALCPG04 Accelerator R&D summary
-
ALCPG04 accelerator WG sessions
ALCPG04 Accelerator R&D summary
-
Instrumentation and electronics (9 projects)LCRD 2.1: Beam Halo Monitor & Instrumented Collimators (Lucien Cremaldi)LCRD 2.2: Beam Test Proposal of an Optical Diffraction Radiation Beam Size Monitor at the SLAC FFTB (Yasuo Fuki)LCRD 2.3: Design and Fabrication of a Radiation-Hard 500-MHz Digitizer Using Deep Submicron Technology (K. K. Gan)LCRD 2.4: RF Beam Position Monitors for Measuring Beam Position and Tilt (Yury Kolomensky)UCLC 2.5: Non-intercepting electron beam size diagnosis using diffraction radiation from a slit (Bibo Feng)UCLC 2.6: Single-shot, electro-optic measurement of a picosecond electron bunch length (Bill Gabella)UCLC 2.7: Fast Synchrotron Radiation Imaging System for Beam Size Monitoring (Jim Alexander and Jesse Ernst) LCRD 2.9: Radiation damage studies of materials and electronic devices using hadrons (David Pellett)LCRD 2.42: Transverse Phase Space Measurements for a Magnetic Bunch Compressor by Using Phase Space tomography (Feng Zhou)
-
LCRD 2.1: Beam Halo Monitor & Instrumented Collimators (Lucien Cremaldi)LCRD 2.1: funded FY03, $28k. Progress in seeing signals from a diamond detector. (Diamond since radiation damage will be an issue.)Other possibilities being considered: W-quartz fiber, for example.
ALCPG04 Accelerator R&D summary
-
LCRD 2.2: Beam Test Proposal of an Optical Diffraction Radiation Beam Size Monitor at the SLAC FFTB (Yasuo Fuki)
LCRD 2.2: funded FY03, $40k. Simulation work so far.ODR Yield in 0.1/g angle ranges: rms transverse beam size
ALCPG04 Accelerator R&D summary
-
LCRD 2.3: Design and Fabrication of a Radiation-Hard 500-MHz Digitizer Using Deep Submicron Technology (K. K. Gan)LCRD 2.3: funded FY03, $40k. Some of the circuit functional blocks have been designed, but none fabricated for test yet.
-
LCRD 2.4: RF Beam Position Monitors for Measuring Beam Position and Tilt LCRD(Yury Kolomensky)LCRD 2.4: funded FY03, $30k. Some data analysis of test beam data from KEK ATF using SLAC-built position monitor.
ALCPG04 Accelerator R&D summary
-
UCLC 2.7: Fast Synchrotron Radiation Imaging System for Beam Size Monitoring(Jim Alexander and Jesse Ernst)UCLC 2.7: exploring possible parameters, configuration. discussions only so far.
-
Design for a Synchrotron Radiation Camera for Beamsize Measurement
Basic concept: Refocus SR in the damping rings to make a projected image of the passing bunch.Diffraction limit on source size forces us into the x-ray regime
Goals: definite: Measure and possible: Single-bunch resolution optimistic: Intrabunch measurement (i.e. z)Don't yet know if this will be possible.Still working on ideas for this.
Status:Have started simple simulations for studying optics and detector choices:Opticspoint-to-point with sufficient magnificationZone plates are one candidateDetectionsmall pixel array is one candidate
Relevant times
tesla nlccycle 57us 743ns
interbunch 20ns 1.4ns
bunchlength 20ps 13ps
Arc dipole
monochromator
l
point-to-point optics
detector
-
LCRD 2.9: Radiation damage studies of materials and electronic devices using hadrons(David Pellett)LCRD 2.9: funded FY03, $20k. Neutron irradiation of permanent magnet materials is underway. Pellett gets reactor time, has student(s) helping with analysis.
ALCPG04 Accelerator R&D summary
-
LCRD 2.42: Transverse Phase Space Measurements for a Magnetic Bunch Compressor by Using Phase Space tomography(Feng Zhou)LCRD 2.42: new proposal FY04
ALCPG04 Accelerator R&D summary
-
Ground motion (1 project)
LCRD 2.11: Ground Motion studies versus depth (Mayda Velasco)Has used ICAR funds to purchase equipment, some installed.
-
Linear collider R&D: Preparing ground motion study in NUMI noise versus depth
Broadband Three-component Seismometers KS-2000
Portable Data Recorder DL-24
Northwestern University joined the study, is providing equipment and will participate in the study
Measurements needed to determine the best depth to locate the next linear collider
Test at Aurora Mine already done
Next Numi Tunnel This was classified as a high priority project (1.5)Szleper, Velasco, Serye
Equipment ordered by NU (will arrive ~ May 27)
-
Mayda Velsaco: beam loss monitors for LCSecondary emission detectors, tested at CLIC test facility at CERN.Fast, rad hard, large dynamic range.
ALCPG04 Accelerator R&D summary
-
Marc Ross: introduction to (and comments concerning) instrumentation issuesHEP must aggressively attack Controls/Instrumentation issues
Real impact (of instrumentation) is the leverage on other aspects of the design esp. high cost systems
ALCPG04 Accelerator R&D summary
-
Grahame Blair: Laser beam wire system at PETRAVertical beam size e = sqrt(m - L ) laser L = (40 10) m e = (170 23 37) m
ALCPG04 Accelerator R&D summary
-
Jeff Gronberg: Nanometer BPM movers
-
Uwe Happek: Bunch length interferometry
-
Uwe Happek: Bunch length interferometry
-
RF Technology and Structuresacoustic sensorsklystron studiesrf cavity studies2 TeV NLC
ALCPG04 Accelerator R&D summary
-
ALCPG04 accelerator WG sessions
ALCPG04 Accelerator R&D summary
-
RF Technology (5)LCRD 2.15 Investigation of acoustic localization of rf cavity breakdown (George Gollin)LCRD 2.17: RF Cavity Diagnostics, Design, and Acoustic Emission Tests (Lucien Cremaldi)LCRD 2.18: Control of Beam Loss in High-Repetition Rate High-Power PPM Klystrons (Mark Hess)UCLC 2.20 Research in Superconducting Radiofrequency Systems (Hasan Padamsee)UCLC 2.21: RF Breakdown Experiments at 34 GHz (J. Hirschfeld).
ALCPG04 Accelerator R&D summary
-
LCRD 2.15: Investigation of acoustic localization of rf cavity breakdown (George Gollin)LCRD 2.15: funded FY03, $9k. Pinging copper dowels with ultrasound transducers and building models of acoustic wave propagation. Currently working at reconciling details of models and data.
ALCPG04 Accelerator R&D summary
-
LCRD 2.17: RF Cavity Diagnostics, Design, and Acoustic Emission Tests (Lucien Cremaldi)LCRD 2.17: funded FY03, $23k. Bench tests, working at understanding results.
ALCPG04 Accelerator R&D summary
-
LCRD 2.18: Control of Beam Loss in High-Repetition Rate High-Power PPM Klystrons(Mark Hess)LCRD 2.18: funded FY03, $40k. My impression is that they have made very nice progress in their modeling efforts.
ALCPG04 Accelerator R&D summary
-
UCLC 2.20 Research in Superconducting Radiofrequency Systems (Hasan Padamsee)UCLC 2.20 FY03 progress: 1) Completed one single cell niobium cavity of the improved (re-entrant) shape with Hpk/Eacc 10% less than the TESLA design. The half-cells were purified at the half-cell stage by an improved heat treatment cycle that reduces the depth of titanium diffusion. This cavity is now at KEK for electropolishing. 2) We are pursuing a less expensive method of electropolishing and have successfully electropolished a single cell 1.3 GHz cavity. We are preparing to test this.
ALCPG04 Accelerator R&D summary
-
UCLC 2.21: RF Breakdown Experiments at 34 GHz(J. Hirschfeld)UCLC 2.21 progress:High-power millimeter-wave components have been received for connecting the surface fatigue test cell to one output arm of the 34-GHz magnicon. Magnicon output power is already sufficient for initial fatigue tests, with anticipated surface temperature excursions of >500 deg C possible in localized areas within the test cell. These tests are to precede mm-wave breakdown tests, to demonstrate the magnicon's utility in powering resonant loads. Design for the support and alignment structure needed for installing the components is underway.
ALCPG04 Accelerator R&D summary
-
Chris Adolphsen: Comparison of warm and superconducting rf technology
many concerns are common to both warm and cold, e.g. klystron lifetimecryo couplers are complicated: warm on the outside, cold on the inside.
ALCPG04 Accelerator R&D summary
-
Perry Wilson: Technology of 2 TeV warm collider
Copper structures; study a possible machine with 22 km length, 1.6 TeV, L=2.4 x 1034NLCTA unloaded gradient ~ 60 MV/m in traveling wave structure. Since want ~100 MV/m, perhaps could use a standing wave structure instead. RF guns have been made with ~80 MV/m standing wave structures so this is encouraging.Klystrons will want to double the pulse width relative to NLC, and up the fficiency form 50% to 60%.only reasonable extrapolations of current NLC technology are needed to go to 2 TeV.
ALCPG04 Accelerator R&D summary
-
Beam Deliveryand Interaction Regionsoverall warm/cold differences and BDS risksjitter and stability comparisons: warm/coldnanosecond time scale feedbackinternational cooperation on BDS
ALCPG04 Accelerator R&D summary
-
ALCPG04 accelerator WG sessions
ALCPG04 Accelerator R&D summary
-
Tor Raubenheimer: Warm/Cold beam delivery system differences
Beam Delivery System is very similar for warm and cold LCsFew intrinsic differences: Larger correlated energy spread in the warm for cases that matter, DE/E can be traded against luminosityLarger longitudinal phase space in cold DR makes further bunch compression difficult (not impossible!)Further bunch compression could be used to reduce disruption or increase the luminosity
ALCPG04 Accelerator R&D summary
-
Andrei Seryi: Review of Jitter stability requirements and stabilization schemes for warm/cold LC designs
Warm LC jitter requirements are more tight But based on prototype measurementsStability is provided by several systemsEach of systems allowed to work not perfectlyAccessible quads make ad-hoc fixes easyCold LC jitter requirements are less tight Stability of quads in cryomodules was not demonstrated Collision stability provided solely by intratrain feedback This single system is not allowed to failQuads hidden in cryostats make ad-hoc fixes difficult
ALCPG04 Accelerator R&D summary
-
Phil Burrows, Feedback on nanosecond timescales (FONT)
ALCPG04 Accelerator R&D summary
-
Tor Raubenheimer: Beam Delivery Risk Assessment for warm / cold LC
A number of risk issues identified in BDSCollective effectsMagnet jitter in BDSHeating of SC IR magnetsCollimator performance and MPS limitationsAberration tuning proceduresCrab cavityThe upper 3.5 items are also issues that can only really be determined late in the project cycle
Risks in the BDS are high because, although unlikely, there is significant luminosity impact and little time for remediationGiven present knowledge, the risks in warm and cold BDS are very similar
-
David Miller: International cooperation on Beam Delivery, Instrumentation & Backgrounds
Crossing angle or not?Lots to do, and much of it needs to be done internationally.
ALCPG04 Accelerator R&D summary
-
Sourcesundulator e+ productionpolarized e- sourceslasers
ALCPG04 Accelerator R&D summary
-
ALCPG04 accelerator WG sessions
ALCPG04 Accelerator R&D summary
-
Electron and positron sources (2)LCRD 2.37: Undulator Based Production of Polarized Positrons (William Bugg)LCRD 2.40: Development of Polarized Photocathodes for the Linear Collider. (Richard Prepost)
ALCPG04 Accelerator R&D summary
-
Accelerator Physics LCRD 2.37 (funded FY03, $25k)Undulator Based Production of Polarized Positrons for Linear Colliders(SLAC Experiment E-166: presented by JC Sheppard) S. Berridge, W. Bugg, Y. Efremenko, T. Handler, Y. Kamychkov, S.Spanier, University of TennesseeC. Lu, K.T.McDonald. Princeton University E-166 uses the 50 GeV FFTB beam in conjunction with a 1 m-long, helical undulator ( = 2.4 mm, ID = 0.9 mm) to make 10-MeV polarized photons.
These photons are converted in a ~ 0.5 rad. len. Thick target into e+ (and e-) with ~ 50% polarization.
The polarization of the positrons and photons will be measured.
E-166 scheduled to run in Oct. 2004.Concept: Balakin and Mikhailichenko (1978)Hardware: Silicon calorimeters (U.Tennessee), Aerogel Cerenkov, Positron transport magnets (Princeton).
ALCPG04 Accelerator R&D summary
-
Polarization Achieved, strained GaAsSLC Pemax ~78% (at source), ~76% at Compton polarimeterJ. E. Clendenin, Polarized Electron Sources for Future Colliders: Present Status and Prospects for Improvement
ALCPG04 Accelerator R&D summary
Cathode
Structure
Growth
Method
Pemax
0
(nm)
QEmax(o)
Polarimeter
Ref
1a GaAsP/GaAs
strained SL
MOCVD
0.92
775
warm
0.005
Mott
Nagoya
a
1b GaAsP/GaAs
strained SL
MBE
0.86
783
warm
0.006
CTS Mott
SLAC
b
0.90
780
cold
0.008
Mller E158-III
SLAC
c
2 GaAsP/GaAs
strained-layer
MOCVD
0.82
805
warm
0.001
CTS Mott
SLAC
d
0.85
800
cold
0.004
Mller E158-I
SLAC
e
-
LCRD 2.40: Development of Polarized Photocathodes for the Linear Collider (Richard Prepost)LCRD 2.40: new proposal FY04, but work underway with SBIR funding. Bandgap engineering of strained GaAs.
ALCPG04 Accelerator R&D summary
-
A. Brachmann, Laser Development for NLC Related Photocathode Research General description of NLC and TESLA requirements for lasersdiscussion of Q-switched laser operation.
ALCPG04 Accelerator R&D summary
-
Y. K. Batygin, e+ Capture in Linear Colliders
ALCPG04 Accelerator R&D summary
-
End Matter
ALCPG04 Accelerator R&D summary
-
ConclusionsStatus of both warm and cold rf cavity development is very encouraging: cavities with adequate gradients can be fabricated A very large amount of detailed work (e.g. beam dynamics, emittance preservation, industrialization, design of control/instrumentation system) is still aheadThe university groups need clear indications that DOE, NSF will support their LC efforts.Theres a LOT to do.Integration of new participants (e.g. university groups) into LC is underway, but still in its early stages. This will be smoother after the technology choice is made.
ALCPG04 Accelerator R&D summary
top related