Status of the Japan Participation and progress in Hiroshima

Status of the Japan Participation and progress in Hiroshima

Toru Sugitate and Kenta Shigaki for the Hiroshima ALICE/PHOS Group

on 21 January, 2005 at CERN

Toru Sugitate / Hiroshima / ALICE004 / 21 January, 2005

presentation outline

Activities in Hiroshima CSP ver.3 and its 1st mass-production continuing studies of PWO/APD/CSP expertizing the PWO carolimeter

Official Business Associated member in ALICE PHOS at RHIC Grant proposal in Japan


CSP milestones for the 1st PHOS module

discussed in July ‘04, based on the successful PS and SPS tests in ‘03;

no circuit change from ver.2 decouple the test input from

signal lines make space around APD sol

dering holes sample evaluation in Sept/Oct a

t CERN thanks to Iouri

production of ver.3 starts on 25 Oct. in Japan

delivered to Hiroshima in late Dec.

4,500 CSP’s now at CERN


continuing studies of PWO/APD/CSP

1.Static properties of PWO’s by; Furukawa, Japan (2000~) RI&NC in Minsk, Belarus (2003~) North Crystal in Apatity, Russia

on; photon yield and decay timeas a function of temp, and

2. APD gain as a function of; temp. and HV

N.C. PWO w/pmt for 60Co-γ’s photon yield decay time

yiel

d/ch

pulse height[ch] time [ns]

9.4 pe @10℃ 11.1ns @10℃

12.5 pe @0℃ 13.5ns @0℃

15.6 pe @-10℃ 17.0ns @-10℃

22.2ns @-20℃

23.0ns @-25℃

20.6 pe @-20℃

24.2 pe @-25℃


expertizing the PWO calorimeter

Recent PWO/APD/CSP tests in JapanTohoku-LNS (2002); photons at 0.8–1.2 GeV

Hiroshima-REFER (2003/04); electrons at 150 MeV

KEK-PS (2004); hadrons/electrons at 0.5–2 GeV

Hiroshima-REFER(2004/Dec); electron at 150 MeV

3x3 array of North Crystal PWO’s w/APD+ CSP(v2)+amp+PHADC in a metal shielded wooden box w/ double - Peltier modules and thermal insulation layer inside.


high-lights from the beam tests in 2004

Pulse height spectra of a 3x3 North Crystal PWO array w/ APD +CSP(v2) readout chain, operated at bias=405V under a condition at -11 ºC; irradiated by 150MeV electrons at the center crystal in Dec 2004 at Hiroshima-REFER

Energy sum spectra for 1.0 GeV beams

left and below; all events; electron events: require electrons at the center.

E / E (@400V in 0ºC)

= (4.6±0.9)%/E [GeV]

(3.1±0.1)%/E [GeV]

(2.8±0.04)%

Pulse height spectra of a 3x3 Norh Crystal PWO array w/ APD + CSP(v2) readout chain, operated at bias = 400V under a condition at 0ºC; irradiated by 1.0 GeV secondary-beams at KEK-PS in June 2004.

•We should improve S/N ratio, •look the stat. term good, and•should find a better beam line.

E / E = 5.3%


official business

Hiroshima, Tokyo-CNS and Tsukuba are now ALICE associated members, together with RIKEN.

Hiroshima: 3 faculty staffs and grad. studentsVarious discussion made about PHOS@RHIC;

Flemming at BNL in Dec.Hideki et.al. at Tokyo in Dec.

Grant-in-Aid proposal (\1.75b~13M EUR for 6 years) submitted; incl.

PHOS/APD&FEE by HiroshimaTRD/detector by TsukubaTRD/readout by Tokyo-CNSnon-ALICE parts by theory and lattice groups

My R&D grant will end in a year, but still may cover; another prototyping/testing work at Hiroshima, production of T- card for PHOS@RHIC, PHOS activities at RHIC, and travels to CERN/BNL/China?


summary and outlook

1. 4,500 CSP’s are now at CERN for the 1st PHOS module2. Japanese 3 institutes’ official participation in ALICE, together with RIKEN3. Grant proposal submitted for PHOS/TRD in Japan4. Plan/discussion of the PHOS@RHIC project underway5. Ready to kick-off the Physics and Tech. WG’s 6. We are looking forward to working for PHOS@RHIC RSN

Status of the Japan Participation and progress in Hiroshima

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