Barrel PID summary

1
Barrel PID summary

• K.Inami (Nagoya)

Summary of RD at Hawaii, Cincinnati, Ljubljana
and Nagoya
2
TOP conceptual design

• Photon detector
• Electronics
• Quartz, mirror
• Support structure
• Detector design

3
Photon detector RD
by Nagoya

• Hamamatsu MCP-PMT (SL10)
• Square-shape multi-anode
• Multi-alkali photo-cathode
• Gain1.5x106 _at_B1.5T
• T.T.S.(single photon) 35ps _at_B1.5T
• Position resolution lt5mm
• Semi-mass-production (14 PMTs)

QE
s34.20.4ps
QE24_at_400nm
TDC 1count/25ps
Wavelength nm
Ave. QE17_at_400nm
TTSlt40ps for all channels
4
Lifetime issue
QE at 400nm (XM0001)

• Multi-alkali p.c. SL10
• Added many protection for gas and ion feedback
• ? Improved lifetime
• ex. JT0087
• Obtained normal Gain and TTS
• Even with improved correction efficiency (35 ?
  60)
• Put Al protection layer on 2nd MCP
• ex. XM0007
• Prototype performance is OK.
• Enough gain 5x105
• Reasonable TTS s3545ps
• CE 55

5
Photonis PMT
by Ljubljana from E-PID session

• MCP-PMT
• Model 85015/A1
• Bialkali photocathode
• 10mm pore MCP
• No Al protection layer
• Gain6x105
• TTSlt40ps
• Started lifetime test
• 200mC/cm2
• Signal yield 10 drop?
• To be checked

6
Electronics status
by Hawaii

• Started to design front-end electronics for HPK
  SL10
• HV divider circuit
• BLAB3 readout board
• ? Detector design optimization

7
Radiation hardness test

• Put front-end ASIC, FPGA and fiber inside
  detector
• Check radiation hardness
• Put prototype board in KEKB tunnel and check FPGA
  reprogram rate and fiber link degradation
• Started from May 17.
• Ran fine through end of Exp.69
• Need to make conclusion

8
Quartz bar, mirror
by Cincinnati

• Quality and performance of mirror and wedge
• Produced by OSI at US
• Test glues
• NOA63 UV cure-type
• Check with laser now.
• Need to be check quality for real-size quartz
  components

9
Support structure
by Hawaii

• Conceptual structure design
• Check distortion of quartz radiator for several
  designs
• Quartz supported by Honeycomb box
• TOP module support (Discussing with KEK mechanics
  group)

10
Design studies
by Hawaii, Ljubljana, Nagoya

• Check performance for several designs
• With actual effects
• MCP-PMT QE, CE, TTS, dead space
• Start timing fluctuation (25ps)
• Cross-checked by several simulation programs
• Geant3 based (Nagoya)
• Geant4 based (Hawaii)
• Analytical method (Ljubljana) ? Almost ready
  for reconstruction code

2-bar fTOP

• MCP-PMT photo-cathode
• Multi-alkali
• GaAsP

1-bar fTOP
iTOP
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Performance check
by Nagoya
Multi-alkali, CE60, lgt350nm
cosq region Good Bad
2-bar 00.6 0.60.8
1-bar (iTOP) 00.3,0.6 0.30.6
Efficiency
Fake rate
12
Performance check
by Hawaii
Multi-alkali

• Generally performance better for 2-bar except
  forward part
• Similar tendency with Nagoyas result

13
Performance check
by Ljubljana
GaAsP

• Similar with other programs
• Need to make figures for multi-alkali
  photo-cathode

14
Design study summary

• 2-bar fTOP
• Multi-alkali and GaAsP p.c. is OK for backward
• Start time fluctuation (25ps) makes bad
  performance for forward
• iTOP / 1-bar fTOP
• GaAsP is OK
• Multi-alkali p.c. makes slightly worse
  performance
• Need more checks
• Include actual effects
• Start timing fluctuation, Incident angle
  fluctuation
• Actual design of quartz and MCP-PMT
• Performance for some physics cases
• With fsim
• With gsim4 and analysis code

15
Cost estimate Production time

• Quartz
• 1618 modules (2x40x91.5cm3 x3 mirror, wedge)
• Okamoto optics (fTOP case)
• 1800x182700?? 3.6M, 2 years
• Zygo/OSI
• Zygo quartz bar 3.54.1M, 11.5 years
• OSI mirror and wedge 0.840.71M, 0.5years
• MCP-PMT
• Hamamatsu 600 pieces for 2-bar TOP, 3 years
• Multi-alkali photo-cathode 2.7M
• GaAsP photo-cathode 4.2M
• Photonis 600 pieces for iTOP, 3 years??
• Bi-alkali photo-cathode 36M?? ? to be checked

16
Cost estimate Production time

• Electronics
• SL10 basis, frontendbackendHV divider
• 2-side readout 0.5M
• Without NRE, COPPER, BLAB3 ASIC
• Structure
• To be estimated.

17
Schedule toward 2013
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Schedule toward technology choice

• By the end of August
• Make list of possible options
• In our case, MCP-PMT choice is important.
• Make performance catalogue for
• MCP-PMTs
• QE, CE, TTS, Gain, Lifetime,
• Detector configuration
• Separation power (eff./fake)
• Robustness (beam BG, T0, tracking, photon loss)
• By the end of December
• Decide detector configuration and technology
• Show test results
• MCP-PMT lifetime, Simulation study, electronics
  test

To be Checked by internal review committee?
19
Summary

• MCP-PMT
• Hamamatsu SL10 (Multi-alkali p.c.,
  28(22)x28(22)mm2, 4ch or 4x4ch)
• Photons 850xx (Bi-alkali p.c., 59(52)x59(52)mm2,
  8x8ch)
• Both performance is OK.
• Need a few month to confirm lifetime
• Electronics
• SL10 base production is in progress
• Radiation hardness test done. ? To be confirmed.
• BLAB3 ASIC fabrication in autumn
• Quartz
• Zygo/OSI products are tested now.
• Design study, Structure study
• Need to check possible configuration with actual
  effects
• We will discuss in detail at PID meeting at
  Nagoya in next week.