Improving the Light Yield and Timing Resolution of Scintillator-based Detectors for Positron
Overview timing detectors - University of...
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Overview timing detectors G. Chiodini - INFN Lecce A. Sidoti - INFN Bologna First Meeting on High Granularity Timing Detector Friday, 3 July 2015 CERN ( 42-R-403 )
Transcript of Overview timing detectors - University of...
Overview timing detectors
G. Chiodini - INFN Lecce!A. Sidoti - INFN Bologna
First Meeting on High Granularity Timing Detector
Friday, 3 July 2015 CERN ( 42-R-403 )
GC and AS “Timing Detectors” /14 3-July-2015 CERN
Overview1. Introduction!
2. Benchmark !
3. Pixel or strips!
4. Some examples:!
1. Ongoing effort for phase I!
2. New ideas for phase II!
5. Technology overviews!
6. Conclusions
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GC and AS “Timing Detectors” /14 3-July-2015 CERN
Introduction(1)Detectors of large area, high granularity and good timing performance is the Gigatracker of NA62:!
• Hybrid pixel detector with 300um x 300um spatial resolution and 175 ps time resolution!
Detectors of not large area, not high granularity and extremely good timing are under development in AFP and TOTEM upgrades for phase I:!
• Quartic (Cherenkov quartz + MCP) with 20 ps time resolution/bar !
Detectors of large area, good granularity and very good timing are under development in CMS ECAL upgrade for phase II:!
• Ionization MCP with 40 ps time resolution
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GC and AS “Timing Detectors” /14 3-July-2015 CERN
Introduction(2)
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The annual WORKSHOP ON P I C O S E C O N D P H O T O N SENSORS FOR PHYSICS AND MEDICAL APPLICATIONS ( h t t p : / / w w w - d 0 . f n a l . g o v /~royon/timing_prague/) is the right place where all these new developments are discussed (also for MIP detector in general).
Several slides of this talk are from this workshop
GC and AS “Timing Detectors” /14 3-July-2015 CERN
Our performance benchmark
1. Size ~ 1 m2 / layer!
2. Spatial granularity 5x5mm2!
3. Time resolution/MIP/layer ~ 40ps x sqrt(Nlayers)!
4. Integrated dose ~ 10-50 Mrad!
5. z clearance < 6 cm
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See first talk
GC and AS “Timing Detectors” /14 3-July-2015 CERN
Strips vs PixelsStrips!
• 1D readout electronics!
• cost!
• LV1!
• ghost!
• noise!
• radiation hardness
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Pixels!
• 2D readout electronics!
• cost!
• LV1!
• noise!
• radiation hardness survival!
• radiation hardness timing performance
GC and AS “Timing Detectors” /14 3-July-2015 CERN
Electronics
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StripsPixels
One CFD + TOF per unit cell (like Gigatracker).!
Very deep sub micron CMOS technology development needed.
Two electronic chains possible:!
1. Multi channel preamplifier + multi channel CFD + multi channel TDC (can be used in LV1)!
2. Multi channel preamplifier + multi channel waveform digitiser (can be used after LV1, likely only off-line)
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QUARTIC FOR AFP
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QUARTIC=!Cherenkov quarz+MCP
8 ch with MiniCircuit
Alberta !CDF HPTDC chip
All components realized and tested with pulser, laser and test beam, … but must fit in a Roman Pot
Detector & PMT R&D: U Texas at Arlington (A. Brandt et al.); Electronics R&D: Stony Brook (M.R. et al)
5 cm from beam"5·1012/cm2
RR13"108-5·109/cm2
On the floor 5·1010/cm2
σTotal,bar~22ps σTotal,6bar~9ps
Example of chain 1) for stripsSee next talk
GC and AS “Timing Detectors” /14 3-July-2015 CERN
Diamond for TOTEM
Example of chain 2 for stripsLarge area coverage is an issue
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Ultra Fast Silicon Detector
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UFSD idea: pixelated silicon detector with internal gain
UFSD gain: Add an extra deep p+ implant
• First prototypes from CNM
show good gain (5-10)
and excellent stability. • A second generation
under way in
collaboration with FBK
(Torino e Firenze)
Ultra-fast Silicon Detector. H.-W. Sadrozinski, M. Bruzzi, N. Cartiglia et al, NIM A(2013)
The project very well funded. Good progresses are aspected in few years.
Often named Low Gain Avalanche Detector (LGAD)
See next talk
GC and AS “Timing Detectors” /14 3-July-2015 CERN
MPGD coupled to Cherenkov radiator
E. Ferrer-Ribas, I. Giomataris, T. Papaevangelou
• Cerenkov radiator 3-4 mm thick. • Preamplification gap 200 um thick • Amplification gap about 1 mm
more. • Expected photo-electrons could be
as high as 20 per MIP for standard (PM-like) photocathodes.
• Metallic (rad-hard) photocathodes would bring the number of p.e. down to 5.
• Gas could be a safe gas such as helium.
• Reached time resolution 35 ps with deuterium lamp.
Thanks to Claude Guyot and Philippe Schwemling for this update
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Timing em shower with MCP
T o m m a s o Tabarelli de Fatis
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Summary table from ATL-UPGRADE-INT-2015-001
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MPGD 2000x2000 35 100 ? photon statistics 10-100?
+ (missed in the table)
• HVCMOS is a very interesting approach but far from timing application … work in progress
• LGAD strip or pixels? • Very rad hard MPGD and Photodetector possible?
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Conclusions
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• High Granularity Timing Detector is really a very interesting project for ATLAS Phase II upgrade
• This effort will benefit a lot from AFP and TOTEM timing detector upgrade for Phase I
• Vigorous R&D needed for sensors and electronics • People, Groups and Institutions support • Adequate financial resources • Completely new technologies are intriguing but risky
• Radiation-hardness is an issue because degrade directly the time resolution.
• Large system performance issues must also be faced (for example time synchronisation inter-side and between sides)
