a brief introduction to the clic study
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A Brief Introduction to the CLIC Study. W. Wuensch TUM visit 8-6-2009. What is the CLIC study? A collaboration lead by CERN to develop the technology for a next generation high-energy physics facility – TeV range e- /e+ linear collider. - PowerPoint PPT PresentationTRANSCRIPT
A Brief Introduction to the CLIC Study
W. WuenschTUM visit8-6-2009
What is the CLIC study?A collaboration lead by CERN to develop the technology for a next generation high-energy physics facility – TeV range e-/e+ linear collider.
ECM should cover range from ILC to LHC maximum reach and beyond ECM = 0.5-3 TeV,
L > few 1034 cm-2 with acceptable background and energy spread
Design compatible with maximum length ~ 50 km
Affordable!
Total power consumption < 500 MW
Physics motivation:
"Physics at the CLIC Multi-TeV Linear Collider: report of the CLIC Physics Working Group,“ CERN report 2004-5
Present goal:
Demonstrate all key feasibility issues and document in a CDR by 2010
http://clic-study.web.cern.ch/CLIC-Study/
CLIC Layout 3 TeV
Two-beam module
G. Riddone, ACE09, 27/05/2009
4All 3D models made by A. Samoshkin
The CLIC world wide collaboration
5EPAC 2008 CLIC / CTF3 G.Geschonke, CERN
Helsinki Institute of Physics (Finland) IAP (Russia)IAP NASU (Ukraine)Instituto de Fisica Corpuscular (Spain)INFN / LNF (Italy)J.Adams Institute, (UK)
Oslo University (Norway)PSI (Switzerland),Polytech. University of Catalonia (Spain)RRCAT-Indore (India)Royal Holloway, Univ. London, (UK) SLAC (USA)Uppsala University (Sweden)
Ankara University (Turkey)BINP (Russia)CERNCIEMAT (Spain)Cockcroft Institute (UK)Gazi Universities (Turkey)IRFU/Saclay (France)
JINR (Russia)JLAB (USA) KEK (Japan) LAL/Orsay (France) LAPP/ESIA (France)NCP (Pakistan)North-West. Univ. Illinois (USA)
Primary areas of accelerator R&D in the CLIC study
• Beam physics – Overall machine design and optimization. Complex simulations of many the effects which can drive instabilities. Ensure sub-nm final beam size, 0.2 degree phase stability.• CTF3 experimental facility – drive beam generation, accelerator physics, high beam powers and efficiency, operation and protection.• High-power rf structures – X-band structures with 150 MW generation and 100 MV/m acceleration. Structure design to prototype testing.• High-precision mechanical alignment and stabilization – Microns and sub-nanometer respectively. System design and demonstration.• Subsystem design and integration• Cost studies
Some areas of collaboration on areas of potential interest to TUM,
RF structure development• Electromagnetic computation – rf design, wakefields, HOM damping, rf components• Test structure program – fabrication, high-power testing• Fundamental breakdown physics studies – simulation, experiment and development of scaling laws• Precision manufacture and assembly – micron tolerances in complex 3-D geometries, mechanical control, mass production
Phase stabilization – 0.2 degree at 12 GHz (14 µm, 50 fs) timing stability over large distances, 10’s of km, and times, hundreds of µsec. RF structure design, phase detection, beam-feedback implementation.
Active alignment – 5-10 µm precision over distances up to 100 m or so.
Mechanical stabilization – 1 nm in the 4000 main linac quadrupoles and 0.1 nm in the final focusing quadrupoles.
Instrumentation – Huge numbers, 100s of thousands, of signals from beam position monitors, profile monitors, rf signals.
Two T18_VG2.4_DISC Structures
Structure for KEK Test
Structure for SLAC Test
95 100 105 110 11510
-7
10-6
10-5
10-4
Unloaded Gradient: MV/m
BK
D R
ate
: 1/p
uls
e/m
BKD Rate for 230ns
250hrs
500hrs
1200hrs
900hrs
500 1000 150095
100
105
110
115
Time with RF on: hrs
Gra
die
nt:
MV
/m
Gradient at 2e-6/pulse/m for 230ns pulse
Experiment DataPower Fit
For Constant Breakdown Rate
Unloaded Gradient at Different Conditioning Times
95 100 105 110 11510
-7
10-6
10-5
10-4
Unloaded Gradient: MV/m
BK
D P
oss
ibili
ty: 1
/pu
lse
/m
BKD Possibility for 230ns
250hrs
500hrs
1400hrs
1200hrs
900hrs
C. Adolphsen
I. Syratchev, 4th ACE meeting, CERN, May 2009.
PETS high power tests at SLAC
Assembly of the eight PETS bars.
11.424 GHz PETS ready PETS installed into the ASTA test area at SLAC
S12i
A1i 3 SH
i ph1
iA1
i 4
11.25 11.35 11.45 11.55 11.65 11.7540
30
20
10
0
2
1.5
1
0.5
0
S11S12S11S12
Frequency, GHz
S11,
dB
S12,
dB
26.5
0.1811.422
11. 424 GHz PETS measurements after final assembly
I. Syratchev, 4th ACE meeting, CERN, May 2009.
ASTA PETS processing history In general, the PETS has been processing up in power well.
Beginning 12.05.09 processing of PETS with 133 ns we end up with 180MW on evening of 20.05.0921.05.09 widened pulse to 266n s and have processed up to 103MW so far.Vacuum activity mostly in output end of PETS structure.
Jim Lewandowski (SLAC)130 MW
103 MW
133 ns
266 ns
Example of the pulses envelopes in ASTA
“short”
“long”
135 MW (CLIC 3 TeV target)
153 MW (CLIC 0.5 TeV target)
266 ns 266 ns133 ns
160
180
200
150 Hours 210 Hours
Pow
er [
MW
]
12.0
5.09
TBTS PETS,140 ns flat,25 minutes.
PETS 1st run (winter 2008/09) PETS 2nd run (May 2009…)