Barrel PID summary K.Inami (Nagoya) Summary of R&D at Hawaii, Cincinnati, Ljubljana and Nagoya

2009/7/7-9 B2GM2 TOP conceptual design - Photon detector - Electronics - Quartz, mirror - Support structure - Detector design

2009/7/7-9 B2GM3 Photon detector R&D Hamamatsu MCP-PMT (SL10) –Square-shape multi-anode –Multi-alkali photo-cathode –Gain=1.5x10 –T.T.S.(single photon): –Position resolution: <5mm Semi-mass-production (14 PMTs) σ=34.2±0.4ps QE ： Ave. QE ： TTS ＜ 40ps for all channels TDC [1count/25ps] Wavelength [nm] QE [%] by Nagoya

2009/7/7-9 B2GM4 Lifetime issue 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 2 nd MCP ex. XM0007 –Prototype performance is OK. Enough gain: ~5x10 5 Reasonable TTS:  =35~45ps CE: ~55% Preliminary result from HPK Old New Measured at Nagoya 1 B2year ~ 0.7C/cm 2 QE at 400nm (XM0001)

2009/7/7-9 B2GM5 Photonis PMT MCP-PMT –Model 85015/A1 Bialkali photocathode 10mm pore MCP No Al protection layer –Gain~6x10 5 –TTS<~40ps Started lifetime test –200mC/cm 2 –Signal yield; 10% drop ? To be checked by Ljubljana from E-PID session

2009/7/7-9 B2GM6 Electronics status Started to design front-end electronics for HPK SL10 –HV divider circuit –BLAB3 readout board  Detector design optimization by Hawaii

2009/7/7-9 B2GM7 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

2009/7/7-9 B2GM8 Quartz bar, mirror 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 by Cincinnati

2009/7/7-9 B2GM9 Support structure Conceptual structure design –Check distortion of quartz radiator for several designs –Quartz supported by Honeycomb box –TOP module support (Discussing with KEK mechanics group) by Hawaii

2009/7/7-9 B2GM10 Design studies 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 iTOP by Hawaii, Ljubljana, Nagoya MCP-PMT photo-cathode - Multi-alkali - GaAsP 1-bar fTOP

2009/7/7-9 B2GM11 Performance check Multi-alkali, CE=60%, >350nm Efficiency Fake rate cos  region GoodBad 2-bar0~0.60.6~0.8 1-bar (iTOP)0~0.3,0.6~0.3~0.6 by Nagoya

2009/7/7-9 B2GM12 Generally performance better for 2-bar except forward part –Similar tendency with Nagoya’s result Performance check by Hawaii Multi-alkali

2009/7/7-9 B2GM13 Performance check Similar with other programs Need to make figures for multi-alkali photo-cathode by Ljubljana GaAsP

2009/7/7-9 B2GM14 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

2009/7/7-9 B2GM15 Cost estimate & Production time Quartz –16~18 modules (2x40x91.5cm 3 x3 + mirror, wedge) –Okamoto optics (fTOP case) 1800x 万円 ~ 3.6M$, 2 years –Zygo/OSI Zygo quartz bar 3.5~4.1M$, 1~1.5 years OSI mirror and wedge M$, 0.5years MCP-PMT –Hamamatsu; 600 pieces for 2-bar TOP, 3 years Multi-alkali photo-cathode; ~2.7M$ GaAsP photo-cathode; ~4.2M$ –Photonis; 600 pieces for iTOP, 3 years?? Bi-alkali photo-cathode; 3~6M$??  to be checked

2009/7/7-9 B2GM16 Cost estimate & Production time Electronics –SL10 basis, frontend+backend+HV divider –2-side readout ~0.5M$ Without NRE, COPPER, BLAB3 ASIC Structure –To be estimated.

2009/7/7-9 B2GM17 Schedule toward 2013

2009/7/7-9 B2GM18 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?

2009/7/7-9 B2GM19 Summary MCP-PMT –Hamamatsu SL10 (Multi-alkali p.c., 28(22)x28(22)mm 2, 4ch or 4x4ch) –Photons 850xx (Bi-alkali p.c., 59(52)x59(52)mm 2, 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.