Folie 1

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AMS02 ACCstatus(background info flight safety )

• October 21, 2004
• Houston
• W. Wallraff

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ACC flight hardware
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ACC general dimensions
RWTH-Dwg 1865 see RB/MW for a copy

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ACC mounting details
RWTH-Dwg 1770b see RB/MW for a copy
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ACC AMS-01 ETH Zürich July 1997
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ACC panel overall dimensions
8mm
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light transport (shifter part) hermeticity
by interlocked panels
2 x 37 fibres
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ACC panel in preparation for glueing the fibres
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ACC light detection system on VC
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PMT, VC and tracker-flange (Z,Y-)
Underneath the MLI, exit for cables to S crate,
cable stress relief
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ACC AMS-01 cabling supports
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03. Dec. 03
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1
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ACC Connector Materials
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2x40gx, 2x10gy, 2x10gz Displacement Vector Length
0.967 mm
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light cable fixation results of FE calculations

• Summary
• Max. Length of Displacement Vector
• 0.967 mm (2x40g)
• Max. Stress in VC Web
• lt13 MPa (2x40gx), lt48 MPa (2x40gy), lt21 MPa
  (2x40gz)
• Margin of Safety
• Minimal MS (spring)270/147 1 0.8
• Minimal MS (connector support) 462/140-12.3

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Finished panel, fine mesh PMT, properties of
wrapping
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ACC (ToF) PMT housing
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PMT housings (Bologna INFN) before potting

• Polycarbonate (injection molded)
• voltage divider completely sealed
• vented
• glass tight

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ACC PMT Support
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PMT housing with ACC plastic fibre connector (2
panels)
03. Dec. 03
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Fibre routing in front of ACC PMT
03. Dec. 03
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PMT front view including light cable (148 fibres,
2 panels)
03. Dec. 03
Radius R3
Radius R10.125
Entry cross-section area equals that of a hose
with a diameter of 14mm (individual lightcable)
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PMT vibration test (RWTH, Prof. Lübelsmeyer)
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PMT (in box) response to vibrations
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PMT gain before and after space qualification
tests
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ACC Connector and Support Design
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Connector View From Outside The VC
03. Dec. 03
3,1mm
Distance from lower edge of hose to upper edge of
the VC-Rib
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Connector View From Inside The VC
03. Dec. 03
1,9mm
Distance lower edge hose to upper edge VC-Rib
(blue lines)
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Connector View From Outside The VC
03. Dec. 03
2.8mm
Height of the Connector above the radial ribs
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Center VC Cross-Section (Z) with ACC lightcables
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ACC status 20-Oct-04

• ACC detection hardware
• Design finished
• Fabrication of engineering modules
• Cosmics beam tests are done
• Components for the production of flight modules
  are being purchased
• ACC electronics
• Design at INFN Bologna (SFEA, SHV, ..)
• Meeting at CERN 27th October
• Fabrication of engineering modules spring 2005
• Fabrication of flight modules winter 2005
• Tests of CAEN produced SFET, SHV (for ToF) this
  winter
• ACC installation
• Magnet up right
• Test with cosmics magnet horizontal/inclined
• Details see RB, KL, GL study

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Cabel Fixation
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(No Transcript)
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ACC Connector PMT Arrangement
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PMT box (common for both ToF and ACC)
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ACC mounting on VC