Fast Timing WorkshopKrakow, Nov 29 - Dec 1st 2010

Part 2b

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Mike Albrow

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Mike Albrow

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Mike Albrow

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Mike Albrow

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Mike Albrow

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Mike Albrow

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Mike Albrow

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Mike Albrow

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Mike Albrow

Resolution of Double Q bar as one device 17ps

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Mike Albrow

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Mike Albrow: SiPMs

Su

SiPMs + quartz window radiator3 x 3 mm2 padspossible strips 6 x 2 mm2

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Mike Albrow: SiPMs

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Mike Albrow: SiPMs

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Nice features of SiPM:

Having many measurements – timetrack – robust – self calibratingResolution and offsets of each detector monitored by data.(In QUARTIC design, argument for multipad Photonis)

Demands on electronics less: σ = 25 ns/ channel HPTDC can be used.Cheap: ~ $100 each (just detector) = $16K for 160 devices.Can be quickly exchanged (“cartouche”, if mechanics designed)Can be extended with extra layers if z-slot large to improve measurement.Low voltage (~ 30-60V) gives gain ~ 106 and single p.e. resolution.

ALICE uses for ToF, CMS may get 10,000’s for HCAL.HPTDC adequate, but next version may get to ~ 10 ps

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Mike Albrow: SiPMs

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Mike Albrow: SiPMs

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Mike Albrow

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Mike Albrow

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Mike Albrow

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Mike Albrow: SiPMs

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Mike Albrow: Streak camera

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Mike Albrow

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Krzysztof Piotrzkowski (Louvain)GasToF

Pico‐second Resolution Time‐of‐Flight Detector With L. Bonnet, J. Liao, T. Pierzchala,and N. Schul

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Krzysztof Piotrzkowski

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Krzysztof Piotrzkowski

• Intrinsically very fast • Light detector – can be used with(in) tracking • Simple (small chromacity) – modeling with raytracing

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Krzysztof Piotrzkowski

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Krzysztof Piotrzkowski

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Krzysztof Piotrzkowski

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Krzysztof Piotrzkowski

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Krzysztof Piotrzkowski

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Krzysztof Piotrzkowski

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Krzysztof Piotrzkowski

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Krzysztof Piotrzkowski

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Jim Pinfold (Alberta)

T he prim a ry g oa l ha s be e n to ha v e the AF P timing system fully

defined for the AFP Technical Proposal:

T he e nd re s u lt s hould be a s y s te m that c an obta in 2 0 ps resolution at an instantaneous

luminosity of 1033 and given funding could be built and installed by mid/late 2012,

and a second stage system capable of 10 ps or better resolution at an instantaneous

luminosity of 1034 and given funding could be built and installed by 2015.

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Jim Pinfold (Alberta)

GASTOF – a gas Cerenkov detector that makeGASTOF – a gas Cerenkov detector that makes a single measurement

QUARTIC – two QUARTIC detectors each with 4 rows of 8 fused silica bar will be positioned after the last 3D-Si tracking station because of the multiple scattering effects in the fused silica.

Both detectors employ Micro Channel Plate PMTs (MCP-PMTs)s a single measurement

QUARTIC – two QUARTIC detectors each with 4 rows of 8 fused silica bar will be positioned after the last 3D-Si tracking station because of the multiple scattering effects in the fused silica.

Both detectors employ Micro Channel Plate PMTs (MCP-PMTs)

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Jim Pinfold (Alberta)

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Jim Pinfold (Alberta)

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Jim Pinfold (Alberta)

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Jim Pinfold (Alberta)

Tested a prototype Burle Planacon tube using variable length fibers

Examined both row and column effect of spillover signal 100, 250 and 500 ps before the target pulse

About 10% of the pulse is detected in adjacent, empty pixels

Data shows that early light is not significantly affected by later light

Later light mean time is shifted, but is not totally dominated by the early pulse

Late time measurement degrades significantly as Δt increases

Exploring ways to reduce this effect

Tested a prototype Burle Planacon tube using variable length fibersExamined both row and column effect of spillover signal 100, 250 and 500 ps before the target pulseAbout 10% of the pulse is detected in adjacent, empty pixelsData shows that early light is not significantly affected by later lightLater light mean time is shifted, but is not totally dominated by the early pulseLate time measurement degrades significantly as Δt increasesExploring ways to reduce this effect

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Jim Pinfold (Alberta)

Alberta: has upgraded Louvain CDF and developed HPTDC board

Goals: Complete design of a 3 HPTDC chip, 8 channel HPTDC board based on successful one chip design (due to occupancy issues only 4 channels available/chip, and one of these is used for reference timing, so a 3 chip board gives 8+1 channels)

Documentation + further system tests, including connections with ROD

Radiation tests of CFD + HPTDC electronics

Stony Brook – Goals:Tests of chain PULSER==>Preamp==>CFD

SPICE model of the chain PreAmp==>CFD==>Trigger

Tests of trigger circuitry

Detailed design of PreAmp PCB

Detailed design of Trigger circuitry

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Jim Pinfold (Alberta)

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Jim Pinfold (Alberta)

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Jim Pinfold (Alberta)

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Jim Pinfold (Alberta)

HPTDC (CERN)

- 12 ps resolution obtained with pulser

- Successfully tested at UTA laser test stand with laser /10 m tube/ZX60 amp/CFD - 13.7ps resolution obtained with CFD

- ~30 ps resolution obtained with real pulses at test beam

800 810 820 830 840 850 860 870 880 890 900

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LCFD_Ch01_No12_spe, high level light, May 6, 2009, UTA laser test

RMS resolution = 13.7 ps

bin number

coun

ts

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Jim Pinfold (Alberta)

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Jim Pinfold (Alberta)

We need to establish if the MCP-PMT’s are capable of coping with the large expected rates at the LHC: up to 15 MHz in a 6mm x 6mm pixel of the MCP-PMT

Lifetime due to photocathode damage from positive ions is proportional to extracted charge:

Using the current limits mentioned previously we get to 35 C/ cm2 /yr (assuming 5x104 gain) at the highest lumi

This is a factor of ~50 more than the expected tube lifetime!

We can get this down by a factor of 2 using a fibre detector but we still need a factor of 25.

We need to establish if the MCP-PMT’s are capable of coping with the large expected rates at the LHC: up to 15 MHz in a 6mm x 6mm pixel of the MCP-PMT

Lifetime due to photocathode damage from positive ions is proportional to extracted charge:

Using the current limits mentioned previously we get to 35 C/ cm2 /yr (assuming 5x104 gain) at the highest lumi

This is a factor of ~50 more than the expected tube lifetime!

We can get this down by a factor of 2 using a fibre detector but we still need a factor of 25.

We need to establish if the MCP-PMT’s are capable of coping with the large expected rates at the LHC: up to 15 MHz in a 6mm x 6mm pixel of the MCP-PMT

Lifetime due to photocathode damage from positive ions is proportional to extracted charge:

Using the current limits mentioned previously we get to 35 C/ cm2 /yr (assuming 5x104 gain) at the highest lumi

This is a factor of ~50 more than the expected tube lifetime!

We can get this down by a factor of 2 using a fibre detector but we still need a factor of 25.

Are MCP-PMT’s capable of coping with the large expected rates at the LHC: up to 15 MHz in a 6mm x 6mm pixel of the MCP-PMT ?

Lifetime due to photocathode damage from positive ions is proportional to extracted charge:

Using the current limits mentioned previously we get to 35 C/ cm2 /yr (assuming 5x104 gain) at the highest lumi

This is a factor of ~50 more than the expected tube lifetime!

We can get this down by a factor of 2 using a fibre detector but we still need a factor of 25.

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Jim Pinfold (Alberta)

We need to establish if the MCP-PMT’s are capable of coping with the large expected rates at the LHC: up to 15 MHz in a 6mm x 6mm pixel of the MCP-PMT

Lifetime due to photocathode damage from positive ions is proportional to extracted charge:

Using the current limits mentioned previously we get to 35 C/ cm2 /yr (assuming 5x104 gain) at the highest lumi

This is a factor of ~50 more than the expected tube lifetime!

We can get this down by a factor of 2 using a fibre detector but we still need a factor of 25.

We need to establish if the MCP-PMT’s are capable of coping with the large expected rates at the LHC: up to 15 MHz in a 6mm x 6mm pixel of the MCP-PMT

Lifetime due to photocathode damage from positive ions is proportional to extracted charge:

Using the current limits mentioned previously we get to 35 C/ cm2 /yr (assuming 5x104 gain) at the highest lumi

This is a factor of ~50 more than the expected tube lifetime!

We can get this down by a factor of 2 using a fibre detector but we still need a factor of 25.

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Benno KROEK (Giessen)and

Ann-Kathrin Rink Avetik Hayrapetyan Hasko Stenzel Klaus Föhl Kristof Kreutzfeldt

Marko Zühlsdorf Michael Düren Michael Sporleder Oliver Merle Peter Koch Sabrina Darmawi Thomas Frach Gordian Prescher Carsten Degenhardt Ben Zwaans

Fast Cherenkov counters forPANDA@FAIR and ATLAS-AFP@CERN

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Benno KROEK (Giessen)

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Benno KROEK (Giessen)

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Benno KROEK (Giessen)

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Benno KROEK (Giessen)

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Benno KROEK (Giessen)

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Benno KROEK (Giessen)

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Benno KROEK (Giessen)

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Benno KROEK (Giessen)

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Benno KROEK (Giessen)

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Benno KROEK (Giessen)

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Benno KROEK (Giessen)

Outlook/Summary

- Measurements: time and position of photons with MCPPMTs, SiPMs and dSiPMs - Test results for Cherenkov DIRC (PANDA) and quartz fibers (AFP-ATLAS) - Next test with MCPPMT and dSiPM at DESY/Hamburg next week Work in progress