recent developments toward the ilc - university at...

Recent Developments Recent Developments Toward the ILCToward the ILC

Jim BrauUniversity of Oregon

Loopfest VI Fermilab April 16, 2007

Jim Brau Recent Developments Toward the ILC Loopfest VI, Fermilab Apr. 16, 2007 2


11km SC linacs operating at 31.5 MV/m for 500 GeVCentralized injector

Circular damping rings for electrons and positronsUndulator-based positron source

Single IR with 14 mrad crossing angleDual tunnel configuration for safety and availability

ILC Schematic


Overall parametersOverall parameters2e34 peak luminosity80% collider availability 500 fb-1 1st four years9.0 mA average current during beam pulse0.95 ms beam pulse and 1.5 ms rf pulse length5 Hz operation and 230 MW power consumption

Beam parameter ranges defined for operabilityBeam parameter ranges defined for operability1000 to 5400 bunches1e10 to 2e10 per bunchBeam power between 5 and 11 MWBunch length: 200 to 500 um at IPIP spots sizes: σx ~ 350 – 620 nm; σy ~ 3.5 – 9.0 nm

ILC Parameters


> 80%


•1e- and 1e+ ring in same tunnel•Beam energy 5GeV•Circumference 6.7km•Requirements

•Bunch population 2x1010

•Number of bunches ~2600 (max ~5100)•Extracted beam

•Norm.emittanceεγx= 8μm, εγy= 0.02μm

•Bunch length 9mm•Energy spread 0.13%

Damping Ring Schematic Layout


CavitiesCavities


ILC Energy Upgrade PathILC Energy Upgrade Path

LinacLinac energy upgrade path based on empty tunnels energy upgrade path based on empty tunnels hard to hard to ‘‘sellsell’’

Empty tunnels obvious cost reduction

Lower initial gradient increases capital costsLower initial gradient increases capital costs

Baseline has tunnels for 500 Baseline has tunnels for 500 GeVGeV cmscms with a with a linaclinac gradient gradient of 31.5 MV/mof 31.5 MV/m

Geometry of beam delivery system adequate for 1 Geometry of beam delivery system adequate for 1 TeVTeV cmscmsRequire extending linac tunnels, adding transport lines, and moving turn-around ~50 km site


detectorB

may be accessible during run

accessible during run Platform for electronic and

services (~10*8*8m). Shielded (~0.5m of concrete) from five sides. Moves with detector. Also provide vibration isolation.

Concept of IR hall with two detectorsConcept of IR hall with two detectors

The concept is evolving and details being worked out

detectorA

A. Seryi, Feb 4, 2007, Beijing


Note – these costs are for the machine, and DO NOT include R&D, land, detectors, inflation, or contingency


Next Steps for the Global Design Effort

couple of months


The ConceptsThe Concepts

LDC

GLD

SiD

4th

See Detector Outline Documents for details - http://physics.uoregon.edu/~lc/wwstudy/concepts/


The ConceptsThe Concepts

Had cal Had cal inside inside coilcoil

DigitalDigitalor or AnalogAnalog

SiSi/W/W4 Tesla4 Tesla1.68 m1.68 mTPCTPCgaseousgaseous

LCDLCD

DoubleDoubleSolenoidSolenoid(open (open mumu))

CompenCompen--sating sating fiberfiber

crystalcrystalTPCTPCgaseousgaseous

4th4th


PbPb//ScinScin..

W/W/ScinScin..

3 Tesla3 Tesla2.1 m2.1 mTPCTPCgaseousgaseous

GLDGLD


DigitalDigital(RPC..)(RPC..)

SiSi/W/W5 Tesla5 Tesla1.27 m1.27 msiliconsiliconSiDSiD

OtherOtherHadronHadronCalCal

EM EM CalCal

SolenoidSolenoidECalECalInnerInnerRadiusRadius

TrackingTracking


/GeV105)/1( 5−×≤pσ

Detector R&D RequiredDetector R&D Required

• Performance requirements for ILC Detector exceed state-of-the-art– Calorimeters with ~100 million cells

• Jet resolution goal ~ 30%/ √Ε– Pixel Vertex Detector with ~109 ≤20 μm pixels

• Impact parameter resolution 5 µm ⊕ 10µm/(p sin3/2θ)• Sensitivity to full 1 msec bunchtrain

– Tracking resolution• TPC• Silicon microstrips

– High Field Solenoid ~ 5 Tesla– High quality forward tracking systems– Triggerless readout

• R&D EssentialDISCOVERY OPPORTUNITY IS GREAT

- limited by detector performance small cross sections/significant backgrounds

- advances different from LHC required


Detector Roadmap (the future)Detector Roadmap (the future)

DETECTOR ROADMAP PROPOSAL DETECTOR ROADMAP PROPOSAL UNDER DISCUSSIONUNDER DISCUSSION (not yet implemented)(not yet implemented)

2008 2008 –– Two detectors defined to initiate Two detectors defined to initiate engineering design effortengineering design effort

20092009--2011 2011 –– Development of two technical designs, Development of two technical designs, produce first engineering design report for the overall detectorproduce first engineering design report for the overall detectors,s,which will be followed by additional volumes which will be followed by additional volumes

(detailed technical reports on subsystems)(detailed technical reports on subsystems)Detector R&D continuedDetector R&D continued

Synchronized to the GDE ILC TimelineSynchronized to the GDE ILC Timeline

Presented by WWS at ILCSC meeting in Valencia, Nov 11, 2006Presented by WWS at ILCSC meeting in Valencia, Nov 11, 2006and again at Beijing ILCSC meeting February 8, 2007and again at Beijing ILCSC meeting February 8, 2007


Detector RoadmapDetector Roadmap

ILCSC meeting in Beijing (February) ILCSC meeting in Beijing (February) supported roadmap for 2 detector engineering design reports (EDRs) by 2010-2011and the concept of an International Detector Advisory Group (IDAG) to unify efforts toward 2 detectors

ILCSC sent message to the WWS coILCSC sent message to the WWS co--chairs (Feb 26) chairs (Feb 26) recalls the significant steps on machine toward realizing a construction-ready EDR on the accelerator by 2010 requests a plan on the detector side at LCWS07 to ensure detector plan develops the same maturity as accelerator in 2010

WWS CoWWS Co--chairs have initiated joint discussions among 4 chairs have initiated joint discussions among 4 concepts and drafted an IDAG charge for considerationconcepts and drafted an IDAG charge for consideration


ILC TimelineILC Timeline

DOE Undersecretary for Science, Ray DOE Undersecretary for Science, Ray OrbachOrbach advocated at the advocated at the February HEPAP meeting that the US should examine the nature February HEPAP meeting that the US should examine the nature of its HEP program in the case that the ILC is stretched out of its HEP program in the case that the ILC is stretched out relative to the GDE technically limited timeline.relative to the GDE technically limited timeline.

GDE timeline (RDR):GDE timeline (RDR):Engineering Design by 2010Start construction in 2012End construction in 2018 (7 year construction)

Interpretation of these comments?Interpretation of these comments?


Interpretation of Interpretation of OrbachOrbach’’ss RemarksRemarks

Despite his concerns expressed at HEPAP, the ILC remains the higDespite his concerns expressed at HEPAP, the ILC remains the highest hest priority midpriority mid--term new project for DOE Office of Science, backed by term new project for DOE Office of Science, backed by strong R&D support (But, overall program must remain healthy) strong R&D support (But, overall program must remain healthy)

Cost of ILC is high enough that request for approval cannot be mCost of ILC is high enough that request for approval cannot be made ade todaytodayFor the US a reliable translation of the GDE cost is needed, reqFor the US a reliable translation of the GDE cost is needed, requiring uiring time (cantime (can’’t rush this)t rush this)International footing is critical International footing is critical SitingSiting, governance, cost sharing ,etc., negotiations can be lengthy , governance, cost sharing ,etc., negotiations can be lengthy

((egeg. ITER). ITER)7 year construction may not be realistic 7 year construction may not be realistic –– needs further study and reviewneeds further study and review

LHC Physics results are neededLHC Physics results are needed

First collisions by end of next decade can be realized if we do First collisions by end of next decade can be realized if we do R&D, R&D, EDR, internationalization EDR, internationalization ⇒⇒ construction decision around 2012construction decision around 2012B. B. BarishBarish says comments are says comments are ““useful kick in the pants.useful kick in the pants.””(source: April Physics Today)(source: April Physics Today)


CONCLUSIONSCONCLUSIONS

The last 2 years have produced The last 2 years have produced a reference design with a cost a reference design with a cost estimate for the ILCestimate for the ILC

Physics and Detector communityPhysics and Detector communityprepares in parallel with the Globalprepares in parallel with the GlobalDesign Effort for the experimentalDesign Effort for the experimentalprogramprogram

Your efforts are a critical element of our preparationYour efforts are a critical element of our preparation

Next steps for machine and detectors Next steps for machine and detectors –– Engineering Design Engineering Design completed in ~2010, preparing for construction start soon aftercompleted in ~2010, preparing for construction start soon after


backupbackup


Example of ILC Detector R&D:Example of ILC Detector R&D:Silicon/Tungsten EM Silicon/Tungsten EM CalorimetryCalorimetry

SLAC/Oregon/BNL/Davis/AnnecyDense, fine grained silicon tungsten calorimeter

(builds on SLC/LEP experience)Pads: 12 mm2 to match Moliere radius (~ Rm/4)Each six inch wafer read out by one chip< 1% crosstalk

Electronics designNoise < 2000 electrons Single MIP tagging (S/N ~ 7) Dynamically switchable feedback capacitor scheme achieves required dynamic range: 0.1-2500 MIPs – 4 deep storage/bunch train

Passive cooling – conduction in W to edgeρ-> π+πo


Example of ILC Detector R&D:Example of ILC Detector R&D:ChronopixelChronopixel (CMOS)(CMOS)

Completed Completed MacropixelMacropixel design last yeardesign last year⇒ Key feature – stored hit times (4 deep)

645 transistorsSpice simulation verified designTSMC 0.18 μm ⇒ ~50 μm pixel

Epi-layer only 7 μmTalking to JAZZ (15 μm epi-layer)

90 nm ⇒ 20-25 μm pixelJanuary, 2007January, 2007

Completed design – Chronopixel2 buffers, with calibration

Deliverable – tape for foundryNear Future (dependent on funding)Near Future (dependent on funding)

Fab 50 μm Chronopixel arrayDemonstrate performance

Then, 10-15 μm pixel (45 nm tech.)

Yale/Oregon/Sarnoff

563 Transistors(2 buffers

+calibration)

50 μμm x 50 μμm


DRAFT IDAG CHARGE DRAFT IDAG CHARGE -- paraphrasedparaphrased

The World Wide Study goal to produce two engineering The World Wide Study goal to produce two engineering design reports for the two complementary detectors in design reports for the two complementary detectors in 20102010The International Detector Advisory Group (IDAG) The International Detector Advisory Group (IDAG)

charged by the ILCSC to assist in overseeing WWS effortsrefine and facilitate the processcritically review the designs and plans

IDAG will meet until oversight of the ILC experimental IDAG will meet until oversight of the ILC experimental program assumed by the World Labprogram assumed by the World Lab

Will detector designs that achieve physics goals of ILC? Is detector R&D matched well to needs of detectors? Can the detector design and engineering keep pace with machine? Are adequate resources available? Are schedules, including construction estimates, reasonable? Are costs well understood?


DRAFT IDAG CHARGE DRAFT IDAG CHARGE -- paraphrasedparaphrased

review status of designs, review status of designs, note strengths and weaknesses, R&D needed, complementarity, and the work, manpower, and resources needed for EDRs

suggest mechanisms to facilitate the two internationally suggest mechanisms to facilitate the two internationally based, complementary detector efforts by the end of 2008. based, complementary detector efforts by the end of 2008. critically review the detector designs which emerge and critically review the detector designs which emerge and plans for plans for EDRsEDRs. If more than two remain by the end of . If more than two remain by the end of 2008, select 2 and suggest how the community can be 2008, select 2 and suggest how the community can be integrated. integrated. review progress toward the completion of two detector review progress toward the completion of two detector EDRsEDRs. . evaluate the relationship between the WWS and the GDE evaluate the relationship between the WWS and the GDE

Is it effective? Are MDI issues being addressed adequately? Is the GDE responsive to the needs of the WWS? Does the WWS respond to the requests of the GDE?

Identify concerns, including worldwide collaborations, Identify concerns, including worldwide collaborations, MOUsMOUs, , work packages, and documents (work packages, and documents (CDRsCDRs, , LoIsLoIs) )


• Bouncer type modulator• Multibeam klystron (10 MW 1.6 ms)


Effect of Tracking ResolutionEffect of Tracking Resolution

2 sint

t t

p bap pδ

θ= ⊕

5

3

2.0 101.0 10

103 MeVh

ab

M

−

−

= ×

= ×Δ =

5

3

1.0 101.0 10

85 MeVh

ab

M

−

−

= ×

= ×Δ =

5

3

4.0 101.0 10

153 MeVh

ab

M

−

−

= ×

= ×Δ =

5

3

8.0 101.0 10

273 MeVh

ab

M

−

−

= ×

= ×Δ =

1

350500

s GeVL fb−

=

= Recoil Mass (GeV)

Recoil Mass (GeV)

Recoil Mass (GeV)

Recoil Mass (GeV)

e e ZH

Xμ μ

+ −

+ −

→

→