Current Status of the Forward RPCs upgrade Activity at KODEL

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Current Status of the Forward RPCs upgrade
Activity at KODEL

• S. K. Park S. H. Ahn
• The Korea Detector Laboratory,
• Korea University

Contents 1. Areas of contribution for the
Forward muon trigger RPCs upgrade 2.
Progress in RE1/1 RPCs 3. Milestones
Oct. 13, 2007 Korea CMS Meeting
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Areas of contribution for the Forward muon
trigger RPCs upgrade
1. Gap production All the RPC gaps
(Starting with RE1/1, RE2/1, RE3/1, RE4/2 and
RE4/3 Possibility a Second layer for RE2/2
and RE2/3) 2. RPC Assembly (in 1.6 lt ?
lt 2.1) 1) RE1/1 - Highest priority among
high-eta detectors. - Planning to produce
6 modules from now to early of 2008. - The
detailed design to be finalized. - One
module to perform an irradiation test with gamma
or neutron sources. 2) RE2/1, RE3/1,
RE4/1 - Needs detailed designs for RE2/1,
RE3/1, RE4/1 - One module to perform
irradiation test with gamma or neutron
sources.
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Numbers of gaps and RPC modules to be produced
for the FRPC upgrade
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3. Current test for HPLs being produced in Korea
- Feasibility study for the HPL supply for
the RPC upgrade - Addressed the same local
company (Meltech) - Three diff. type samples
thickness of the melamine layers 42 g/cm2,
28 g/cm2 25 g/cm2 -gt lest resistive -
Each batch -gt just one sample sheet 25
g/cm2 ? Range of the resistivity 4
7 ?1010 ?cm was slightly higher than
expected.
60 km away from Korea University
Incheon
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Resistivities of the sample HPLs
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Progress in RE1/1 RPCs 1) A mockup chamber
produced to be tested for the installation
(Dec 2006). 2) The 3D design has been made.
Ready to manufacture gaps and RPC modules.
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RE1/1 RPCs 10 degree trapezoidal, 36 RPC
modules on each wing Total 72 RPC modules
Patch panel to mount cables, cooling, and gas
lines
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Three 10 degree RE1/1 RPCs to check The
feasibility of istallation
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Gas and cooling design for every 60 degree sector
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What have been done for RE1/1 RPCs ? 1) A mockup
chamber produced to be tested for the
installation (Dec 2006). 2) The
first-level 3D design has been made. 3)
Detailed module design finished. 4) RPC gaps
are currently being produced.
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Silk screen method for graphite coating (100
200 k?/square)
PET film coating
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Gap assembly
Linseed oil coating
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Preparation for gas test
Gaps Packed in a wooden box
RE1/2 gaps delivered to CERN
Wooden boxes in transportation
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200 mCi 137Cs gamma irradiation facility DAQ
electronics
200 mCi 137Cs gamma irradiation facility DAQ
electronics
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Possible timeline
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• 3. Milestones for CMS Forward RPC upgrade
• We are ready to start the mass production
  whenever fund becomes available !
• Action items
• 1) Further tests needed for HPLs.
• 2) Preparation of QA for HPLs.
• 3) Detail design for installations of 6 modules.
  
• 4) 6 RE1/1 modules to be installed in any
  available time (but maybe during December, 2007).
  
• 5) Design of Hi ? RPCs (RE2/1 and RE3/1).
• 6) Gap and detector production from May 2008.
• 7) High-level radiation test for RE1/1.