PWO/APD/CSP Development at Hiroshima U. Hiroshima ALICE-PHOS Group (T.Sugitate, K.Shigaki, et al.)...
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Transcript of PWO/APD/CSP Development at Hiroshima U. Hiroshima ALICE-PHOS Group (T.Sugitate, K.Shigaki, et al.)...
PWO/APD/CSP Development
at Hiroshima U.
Hiroshima ALICE-PHOS Group
(T.Sugitate, K.Shigaki, et al.)17 August, 2004, at CERN
PWO/APD/CSP Development at Hiroshima U. - T.Sugitate, K.Shigaki, et al.
217 August, 2004
- Presentation Outline - Recent Activities on PWO/APD/CSP at
Hiroshima Universityreadout electronics status update
CSP design version 3continuing property studies of key
componentsbetter expertise on PWO/APD handlingcalorimeter prototype performance evaluation
beam tests at KEK-PS and Hiroshima-REFER
Summary and Outlook Official Business
PWO/APD/CSP Development at Hiroshima U. - T.Sugitate, K.Shigaki, et al.
317 August, 2004
- Pre-amplifier Design Revised (Ver.3) - slightly modified layout (see next
slide)no circuit change from version 2proposed and discussed in July, 2004
version 3 status and plan100 boards in production
delivery expected in late-September, 200450 of them w/o capacitor “C5” mounted
to decouple test input pin from signal linesto be sent to Iouri at CERN for evaluation
shipping planned in October, 2004
PWO/APD/CSP Development at Hiroshima U. - T.Sugitate, K.Shigaki, et al.
417 August, 2004
- New Pre-amplifier Layout (Ver.3) -
version 3 mask (black) overlaid on version 2 photo (green)
components moved (from yellow to red) to make space around APD soldering holes
PWO/APD/CSP Development at Hiroshima U. - T.Sugitate, K.Shigaki, et al.
517 August, 2004
- Pre-amplifier Task and Schedule - early decision of CSP version required
version 2 or 3 on 1st PHOS module ?need to complete mass production in
JFY04 (ending March, 2005) CSP for 1st PHOS module coming soon
to be ready for assembly by late-January, 2005
PWO/APD/CSP Development at Hiroshima U. - T.Sugitate, K.Shigaki, et al.
617 August, 2004
- Past PWO Crystal Property Studies - Furukawa Co. Ltd. in Tokyo, Japan
density 8.28 [g/cm3]radiation length 0.89
[cm]Moliere radius 2.2 [cm]peak emission 420-440
[ns]refractive index 2.3
20 x 20 x 200 mm
Y-doped PbWO4
light yield mean decay time
transmittancemeasured withHitachi U3010
spectrophotometer
ALICE-PHOSoperation point
ALICE-PHOSoperation point
PWO/APD/CSP Development at Hiroshima U. - T.Sugitate, K.Shigaki, et al.
717 August, 2004
- Recent PWO Crystal Property Studies - RI&NC Co. in Minsk, Belarus
adopted by CMS investigated; similar properties as
Furukawa’s ref. graduation thesis by K.Yokoyama
(available only in Japanese)
North Crystal Co. in Apatity, Russiaadopted by ALICE-PHOSdetailed investigation ongoing at Hiroshima
further comparison of crystals in progress
PWO/APD/CSP Development at Hiroshima U. - T.Sugitate, K.Shigaki, et al.
817 August, 2004
- Expertise on PWO/APD Handling - cooling with Peltier modules
stable operation down to ~ 0 ºC better ground handling to reduce
noisesuccessful operation of APD readout
system
PWO/APD/CSP Development at Hiroshima U. - T.Sugitate, K.Shigaki, et al.
917 August, 2004
- Prototype Performance Evaluation -
prototype components PWO crystals: Furukawa (Japan) / RI&NC
(Belarus) / North Crystal (Russia) PMT: Hamamatsu R1450 APD: Hamamatsu S8664 pre-amplifier: Hiroshima ver.1/2 cooling: Peltier modules
tests in Japan Tohoku-LNS (2002); photons at 0.8 – 1.2 GeV Hiroshima-REFER (2003/04); electrons at 150
MeV KEK-PS (2004); electrons at 0.5 – 2 GeV
PWO/APD/CSP Development at Hiroshima U. - T.Sugitate, K.Shigaki, et al.
1017 August, 2004
- Past Beam Tests at LNS/REFER - w/ PMT readout
E/E = 2.5 %/E [GeV] 1.3 %
x = 2.3 mm/E [GeV]
noise problem with APD at room temp.
counts
[a.u
.]
Etotal = 141 MeV
σ/Etotal = 7.3 % = 2.8 %
/E
total energy [MeV]
PWO/APD/CSP Development at Hiroshima U. - T.Sugitate, K.Shigaki, et al.
1117 August, 2004
- Recent Beam Test at KEK-PS - prototype w/ real ALICE-PHOS components
NC PWO + Hamamatsu APD electron enriched non-separated (IT) beam
negatively chargedelectron/beam ~ 1 % before online enrichment
beam momentum scan0.5 GeV/c – 2.0 GeV/c
APD HV scan380 – 430 V (400 V nominal)
PWO/APD/CSP Development at Hiroshima U. - T.Sugitate, K.Shigaki, et al.
1217 August, 2004
- KEK-PS T564 (16-23 June, 2004) - 31.3 M total (mixed) triggers;
including 664 K electron triggers successful operation of APD readout
PWO/APD/CSP Development at Hiroshima U. - T.Sugitate, K.Shigaki, et al.
1317 August, 2004
- PWO/APD/CSP/Readout Signals -ADC distributions
punch-through hadrons
electrons
pre-amplifier output
shaping amplifier output
PWO/APD/CSP Development at Hiroshima U. - T.Sugitate, K.Shigaki, et al.
1417 August, 2004
- Hiroshima’s Prototype Performance - E/E = 5.5 % at 1 GeV/c, 3.1 % at 2
GeV/cwith quick and rough near-line
calibrations including significant beam momentum
spread analysis ongoing to subtract external
contributionsgas cherenkov hit required
electrons in center cell selected
PWO/APD/CSP Development at Hiroshima U. - T.Sugitate, K.Shigaki, et al.
1517 August, 2004
- cf. Kurchatov’s Prototype Performance - Kurchatov 1616 prototype
E/E at –25 ºC :
1.3 %/E [GeV] 3.6 %/E [GeV] 1.1 %
PWO/APD/CSP Development at Hiroshima U. - T.Sugitate, K.Shigaki, et al.
1617 August, 2004
- Summary and Outlook - charge-sensitive preamplifier (CSP) design
revised; version 3 in test production CSP for 1st PHOS module by January, 2005 continuing basic property investigation of
PHOS key components (PWO/APD/readout)
several prototypes fabricated/tested better local expertise independent PHOS prototype performance
evaluation in progress
PWO/APD/CSP Development at Hiroshima U. - T.Sugitate, K.Shigaki, et al.
1717 August, 2004
- Official Business - applied for ALICE associate
collaborationtogether with Tokyo and Tsukuba
Universitiesapproval requested at next ALICE
meeting“official” PHOS participation expected
soon
PWO/APD/CSP Development at Hiroshima U. - T.Sugitate, K.Shigaki, et al.
1817 August, 2004
- PHOS Collaboration at Hiroshima U. - 3 staffs, ~10 graduate students
H.Harada, K.Haruna, K.Hirashita, K.Homma, K.Hosokawa, R.Kohara, Y.Nakamiya, M.Ouchida, H.Sakata, K.Shigaki, T.Sugitate, D.Toyoda, Y.Tsuchimoto, K.Yokoyama
Hiroshima PHOS web pagehttp://www.hepl.hiroshima-u.ac.jp/
quark/pwo/