J-Cal%20Construction%20Plan

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J-Cal Construction Plan

• Tatsuya Chujo
• University of Tsukuba
• (for the ALICE J-Cal Project)

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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 104
• 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.

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Detector assembly, workflow and costs

• 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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Stacking station (_at_ Wayne State Univ.)

• To make one module
• lt 2 hours for stacking (Pb, Scint)
• 24 hours for compression
• 24 hours for pressure control and monitor.
• Total 2.1 days
• 288 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.

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Back/front plates, compression plate, support
side plates
Special parts developed at Wayne Sate. Can be
purchased from Wayne State.
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Lead Absorber Plates/Scint. Plates.

• Pb plates Vulcan.
• Scint Uniplast, Russia
• takes 6 months for the new production.
• need a special cutting (at Wayne state)

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Fibers, APD, pre-amp., light guide
Can be purchased them in Japan WLS fiber Y11 Si
APD S8664-55 pre-amp GN-0261-3A APD charge
sensitive amplifier
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Costs estimates

• Budget 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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Timeline
2009
2010
2011
2012
Install SM
Install Frame
B-to-B Trigger inst
Detector Construction
Proto-type building
Buying Parts, Production prepare
APD calibration and make DB
Analysis tool development
Data Analysis (pp, PbPb)
Trigger programming dev.
Physics Results
pp
PbPb
pp
6 month LHC shutdown
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Parts for proto-type (for 1 module)
Lead tiles (inside the box)
Courtesy of Tom Cormier
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Summary 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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Backup
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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-EMCal Physics Parameters
1SM 22 degrees (0.4 rad) in phi, 0.7 in eta.