Overview of detector requirements
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Transcript of Overview of detector requirements
Overview of detector requirements
Purpose:
To put today’s session into context.
Steve Watts and Krzysztof Piotrzkowski
WHAT IS THE PHYSICS WE WANT TO DO ???????????? Plenty of diffractive events (SD and DPE) Physics programme in QCD and photoproduction.
Two exciting new physics production processes
Central Exclusive Production (CEP) Khoze, Martin and Ryskin.
and using the LHC as a photon-photon collider – photon-photon physics
Quantum number selection rule.High precision mass measurementindependent of decay channel
See few events => JPC = 0++
Production very large. Well knowncross sections for SM and BSMprocesses: SUSY production andanomalous couplings
cf. High energy photon collisions at the LHC – CERN April 2008
CDF arXiv 0902.1271
9.30 am : FORWARD DETECTORS AT LHC
Chair: Andrew Brandt9.30: Overview of detector requirements - Krzysztof Piotrzkowski, Steve Watts (25+5) 10.00: Machine Interface (Hamburg pipe and Connection Cryostat) - Detlef Swoboda (25+5) 10.30: Fast timing (GASTOF Update) - Krzysztof Piotrzkowski (25+5) 11.00 am : Coffee
Chair: Krzysztof Piotrzkowski11.30: AFP Timing Electronics - Jim Pinfold (15+5)11.50: Reference Timing - Jeff Gronberg (15+5) 12.10: Reference Timing and Fermilab test beam - Mike Albrow (15+5)12.30: 3D sensor development - Cinzia Da Via (25+5) 1.00 pm : Lunch
Chair: Jim Pinfold2.00: Laser testing and MCP lifetime plans - Andrew Brandt (25+5)2.30: Fiber detector studies - Weilin Yu (25+5)3.00: AFP tracker plans - Steve Watts (10+5)3.15: AFP Tracker Mechanics - Ray Thompson (15+5) 3.35: Forward detector alignment - Peter Bussey (25+5) 4.00 pm : Afternoon Tea 4.30 pm: 3D sensor plans for HPS – Marta Ruspa
4.50 pm: Round Table - Future Plans - All (55+5) 7.30 pm Dinner
History
2000
Technical ProposalDue end 2010
CMS – High Precision Spectrometers (HPS)At 240 and 420 m
AFP and ATLAS
Two stations at 220 and 420m to detect leading protons, integrated into the LHC
High precision massspectrometer using the LHC 70 – 1400 GeV/c2
420 m28 7x8 mm2 sensorsper tracking station4 stations required.or 14 FE-I4 sensors220m14 FE-I4 sensorsor 60 FE-I3 sensors
DETECTOR REQUIREMENTS• Must get as close as you dare to the beam or acceptance lost.
Edgeless detectors ( Cinzia Da Via and Marta Ruspa) + Hamburg Pipe
Design compatible with collimator design. Liaison with machine division is vital. ( Detlef Swoboda)
• Tracking precision. One micro-radian or 10 micron with 10 m telescope (Ray Thompson). Sensor + Readout chip must withstand very high radiation levels.• 420 region is at 1.8 K. New Connection Cryostat.• Pile up. Timing detectors with 10 ps or better precision. High rates and lifetime issues for MCP/PMT tube design, (Krzysztof Piotrzkowski, Andrew Brandt) New Reference Timing System ( Mike Albrow, Jeff Gronberg)• Very important to trigger on protons at 220 ( or 420 if you can). Higgs to bb channel. ( Jim Pinfold, Weilin Yu )
• Systems must be compatible with operation in LHC tunnel. Radiation levels and overall need for safe and reliable operation• Calibration and alignment of a precision spectrometer – how ? ( Peter Bussey)
More recent acceptance studies (P. Bussey)….
Acceptance for 420+420, 420+220 and 220+220. Numbers mean total distances. 420 at 6 mm everywhere (can do much better than this !)220 varying from 2mm to 7mm.
HPS acceptance with newest LHC optics m
12/2009 K. Piotrzkowski 8
Note: 2mm approach introduce some shadowing of HPS420
N. Schul & J. de FavereauUsing two-photon spectra!
Radiation levels - summary
6/12/2008 Forward Physics at the LHC 10
Location Distance from IP [m]
Dose[Gy]
h > 20 MeV[cm-2]
1Mev Eq.[cm-2]
Q6 220 1 3x108 2x109
RR13,17,53,57
250 0.5 1x108 1x109
Q11 430 500 9x1011 2x1012
FP420 space 416-430 700 1x1012 1x1013
MB11A 440 12 4x1010 2x1011
MB11B 450 10 3x1010 1x1011
Annual levels for nominal LHC
T. Wijnands, TS Department
Relevant to the support electronic systems in the tunnel and cooling system
NOW ON WITH THE SHOW