SiD Silicon-Tungsten ECal Update

1
SiD Silicon-Tungsten ECal Update
Ray Frey, July 7, 2006

• Baseline configuration
• transverse seg. 12 mm2 pixels
• ? 1 mm readout gaps
• longitudinal (20 x 5/7 X0) (10 x 10/7 X0)
• EM resolution 17 /sqrt(E)

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Si/W ECal RD Collaboration

• KPiX readout chip
• downstream readout
• detector, cable development
• mechanical design and integration
• detector development
• readout electronics
• readout electronics
• cable development
• bump bonding
• mechanical design and integration

M. Breidenbach, D. Freytag, N. Graf, R. Herbst,
G. Haller, J. Jaros, T. Nelson Stanford Linear
Accelerator Center J. Brau, R. Frey, D. Strom,
M. Robinson, A. Tubman U. Oregon V.
Radeka Brookhaven National Lab B. Holbrook, R.
Lander, M. Tripathi UC Davis S. Adloff, F.
Cadoux, J. Jacquemier, Y. Karyotakis LAPP
Annecy

3
News since previous update (Dec 05, fnal)

• KPiX readout chip
• v2 prototype functions !!
• but with some mysteries to be solved
• Incremental progress on prototype Si detectors in
  lab
• Ready to proceed with v2 (this week!)
• v2 to be used for full-depth test module
• First flex readout cable design ready
• Invited to submit supplementary proposal for
  detectors, readout cables, and bump bonding
• Oregon and Davis 2x150k
• Proposal due this week (yikes!)

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KPiX chip One channel of 1024
Dynamic gain select
12 bit A/D
Si pixel
Storage until end of train. Pipeline depth
presently is 4
Leakage current subtraction
Event trigger
calibration
5
KPix Cell 1 of 1024
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Prototype Layout 1x32
1 x 32 Calorimetry
1 x 32 Si Strip
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ECal schematic cross section
New
Metallization on detector from KPix to cable
Bump Bonds
Kapton Data Cable
KPix
Si Detector
Kapton
Heat Flow
Thermal conduction adhesive
Gap ? 1 mm
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Conceptual Schematic Not to any scale!!!
Readout Chip KPix
Locating Pins
Detectors
Tungsten Radiator
1m
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prototype Si detector studies
10
Response of Detectors to 60KeV Gamma's from Am241
Possible 1 wafer-wafer calibration?
11
Noise is consistent with expectation from
capacitance and series resistance
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ECal RD Plan (Outline)
From Dec 05
1st round prototype detector development and testing 2004-6 Oregon. LCDRD
KPiX 1st prototype chip delivery and bench testing today- 3/06 SLAC
Develop and fab kapton readout cable 2006 UC Davis
Mount KPiX-p1 to detectors test in lab and in electron beam Late 2006 SLAC, Oregon, UC Davis
Design and order 2nd round detectors (40) for full-depth ECal module 2006 Oregon, funding DoE supp?
Develop and order KPiX-p2, concentrator boards 2006 SLAC
Develop and design mechanics for full-depth ECal module and FEA for SiD ECal 2006 Annecy
Mechanical and magnetic field tests 2006-7 All
Order full 1024 channel KPiX 2007 ? SLAC
Fab. ECal module test in electron beam determine EM response and resolution 2007 All
ECal module HCal module in hadron beam (presume FNAL) G4 validation 2008 ? All
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ECal RD Plan (Outline)
updates
status
1st round prototype detector dev. and testing 2004-6 Oregon. LCDRD v
KPiX 1st prototype chip delivery and bench testing today- 3/06 SLAC v2, 7/06
Develop and fab kapton readout cable 2006 UC Davis v dev
Mount KPiX-p1 to detectors test in lab and in electron beam Late 2006 SLAC, Oregon, UC Davis v2, beam?
Design and order 2nd round detectors (40) for full-depth ECal module 2006 Oregon, funding supp? on track
Develop and order KPiX-p2, concentrator boards 2006 SLAC v3 is next
Develop and design mechanics for full-depth ECal module and FEA for SiD ECal 2006 Annecy
Mechanical and magnetic field tests 2006-7 All
Order full 1024 channel KPiX 2007 ? SLAC
Fab. ECal module test in electron beam determine EM response and resolution 2007 All on track (I think)
ECal module HCal module in hadron beam (presume FNAL) G4 validation 2008 ? All
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Some overdue (simulation) studies...

• Longitudinal structure
• What EM resolution is required ?
• Particle flow (photon E res. shouldnt
  contribute)
• id of tau final states
• ?o reconstruction? High energy?
• Depth (containment) and numbers of layers (money,
  pattern recognition of EM vs HAD showers)
• Dont yet know how well HCal can help with EM
  showers (!)
• Segmentation
• gamma-gamma and h? gamma separability
• Can use fast MC to evaluate effects (leftover
  project from last summer)
• Raison detre studies
• jet/pflow processes
• Without beam constraint (eg invisible decays)
• tau, ...