ALICE high pT workshop, LBNL, April 7, 2009 (T. Chujo)

J-Cal Construction Plan

Tatsuya Chujo

University of Tsukuba

(for the ALICE J-Cal Project)

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ALICE high pT workshop, LBNL, April 7, 2009 (T. Chujo)

Organization (as of April 2009)Organization (as of April 2009)

• Staff : 6

• Y. Miake (Prof.; project leader)

• S. Esumi (Assoc. Prof. ; physics analysis, simulation)

• T. Chujo (Assist. Prof. ; design, construction)

• M. Inaba (Assoc. Prof. ; trigger, readout, electronics)

• T. Horaguchi (new post-doc)

• M. Shimomura (new RA)

Students : 10+4

D2: K. Watanabe

D1: D. Sakata, M. Sano

M2: H. Yokoyama, K. Midori, T. Todoroki, E. Hamada, M. Kimura

M1: Y. Sekine, T. Takeuchi

UG: 4 students. 2

ALICE high pT workshop, LBNL, April 7, 2009 (T. Chujo)

Detector assembly, workflow and Detector assembly, workflow and costscosts

We visited Wayne State Univ. on Dec. 2008, and

leaned how to build the modules, strips, and SM from

Tom C. and company.

We think that it is possible to make modules (and

maybe strips) at Tsukuba, if we have stacking stations

locally.

Current plan: building modules (or strips) at Tsukuba,

and ship them to CERN (or Wayne State) for the final

SM assembly, then install to ALICE.

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ALICE high pT workshop, LBNL, April 7, 2009 (T. Chujo)

Stacking station (@ Wayne State Univ.)Stacking station (@ Wayne State Univ.)

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To make one module:1)< 2 hours for stacking (Pb, Scint)2)24 hours for compression3)24 hours for pressure control and monitor.

Total: 2.1 days288 moduels x 2.1 days = 604 days per SM.

•We need at least 2 or 3 stacking stations, and pressure control/monitoring systems, in order to make modules in the reasonable speed. •Detail planning and discussions with Wayne State U. are necessary.

ALICE high pT workshop, LBNL, April 7, 2009 (T. Chujo)

Back/front plates, compression plate, Back/front plates, compression plate, support side platessupport side plates

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Special parts developed at Wayne Sate. Can be purchased from Wayne State.

ALICE high pT workshop, LBNL, April 7, 2009 (T. Chujo)

Lead Absorber Plates/Scint. Plates.Lead Absorber Plates/Scint. Plates.

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•Pb plates: Vulcan. •Scint: Uniplast, Russia

• takes 6 months for the new production.• need a special cutting (at Wayne state)

ALICE high pT workshop, LBNL, April 7, 2009 (T. Chujo)

Fibers, APD, pre-amp., light guideFibers, APD, pre-amp., light guide

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Can be purchased them in JapanWLS fiber: Y11Si APD: S8664-55pre-amp: GN-0261-3A APD charge sensitive amplifier

ALICE high pT workshop, LBNL, April 7, 2009 (T. Chujo)

Costs estimatesCosts estimatesBudget: Total of ≲$1 M (USD) in 5 yrs (Grant in Aid, JSPS).

1 ALICE EMCal module (4 towers) $1,327 (USD, w/o

assembly labor, APD, pre-amp, Strong back, FEE).

3 SM (= 864 modules)

•Mechanical: $ 1,327 x 864 = $ 1,146,528 (USD)

•Readout: ~$50 (APD, preamp) x 4 x 864 = $172,800(USD)

•FEM (4x864 = 3,456 ch, 26 CHF/ch) : $ 89,856(USD)

•Total: ~$1.4 M (USD)

+ Mechanical support + shipping cost.

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ALICE high pT workshop, LBNL, April 7, 2009 (T. Chujo)9

TimelineTimeline2009 2010 2011 2012

Detector Construction

p+p Pb+Pb

Physics Results

Insta

ll S

M B-to

-B

Trig

ger in

st

Analysis tool development

Trigger programming dev.

1st module assembly ship

ping

1st SM assembly

2nd module assembly ship

ping

2nd SM assembly

p+p

Insta

ll Fra

me

Buying Parts, Production prepare

Proto-typebuilding

Frame design

Frame building

Data Analysis (p+p, Pb+Pb)

APD calibration and make DB

6 month LHC shutdown

3rd module assembly ship

ping3rd SM assembly

ALICE high pT workshop, LBNL, April 7, 2009 (T. Chujo)

Parts for proto-type (for 1 module)Parts for proto-type (for 1 module)

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Courtesy of Tom Cormier

Lead tiles(inside the box)

ALICE high pT workshop, LBNL, April 7, 2009 (T. Chujo)

Summary on constructionSummary on construction We are proposing to build and install the same EMCal on the

opposite side of the ALICE-EMCal, to enhance the capability of

B-to-B jet physics.

Acceptance: 3 SM of ALICE-EMCal (1.0 x 0.7).

Modules (or Strips) can be built at Tsukuba, and ship them

to CERN (or Wayne State Univ.) for the final SM assembly and

installation .

Need new support structure for the J-Cal.

Start the mass production in Fall/Winter 2009.

Current target date: installation from summer 2010.

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ALICE high pT workshop, LBNL, April 7, 2009 (T. Chujo)

BackupBackup

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ALICE high pT workshop, LBNL, April 7, 2009 (T. Chujo)

Naming conventions (ALICE-EMCal)Naming conventions (ALICE-EMCal)

•1 module = 4 towers (4 APD readouts, 1

readout = 6x6 (holes) = 36 WLS fibers)

•1 strip = 12 modules

•1 super module (SM) = 24 strips

•1 SM = ½ sector

•1 sector = 2 SMs.

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ALICE high pT workshop, LBNL, April 7, 2009 (T. Chujo)

ALICE-EMCal Physics ALICE-EMCal Physics ParametersParameters

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1SM : 22 degrees (0.4 rad) in phi, 0.7 in eta.