Update on the RPD

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Update on the RPD

• Mechanical design
• Time resolution of B ring elements
• Timelines

E.Burtin, Tecnical Board, Feb. 15, 2008
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Overview
Re-use  blue vessel  reinforced
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Ring A and conical cryostat
2 cm thick Al plates
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Ring A and conical cryostat
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Attachement of conical cryostat
Not final fixation, repeater cards (Torino)
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Fixation of PMTs
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Assembly
Meeting with survey group Feb. 14 - No show
stopper was found - Sequence of survey agreed upon
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Timing resolution of ring B elements

• EMI gives 200ps resolution on ring A
• Number of photo-electrons are similar
• Next steps
• Ship scintillators and bench to saclay
• Test with final bases (under design, date of
  availability ?)

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Timelines - 1
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Timelines - 2
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Conclusions
Mechanical support Design almost ready Needs
final model of conical cryostat Calculations of
displacement and constrains underway Ring B
counters need to understand time resolution
and get bases
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Cryogenic control system
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Overview of the full project