RD-2011-04-25

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This meeting will be dedicated to developing a broad strategy and timeline for our work over the next year.

Some slides from the RD51 Collaboration Meeting, CERN. C. Woody, A. Franz (PDF).

Some slides regarding RICH calculations, K. Dehmelt (pdf)

Some slides regarding overall EIC options, N. Smirnov (pdf)



MINUTES:

Hi all

Today our meeting featured three presentations:


SLIDES:

Achim presented a summary of the most relevant points:

  • Garfield++ is soon to release.
    • Geant-4 compatable
    • Magboltz (gas sim) still being finished.
  • New hardware will allow CERN GEM shops to increase sizes ~2X in each direction:
    • Capacity will remain similar (i.e. large projects take whole shop).
  • SRS readout (ala Marcus) development in excellent shape.
  • TIMEPIX reads 3D using slow drift.
    • Likely TIMEPIX is too thick for us.
    • Concept of gas+silicon readout still attractive.
  • BNL work on ATLAS chip progressing (viable option for us).
  • Resistive layers allow for very large micromegas.

Klaus presented some ideas regarding Cherenkov:

  • Liquid radiators index makes proximity focus the most practical.
  • CsI cathodes possible readouts that can provide:
    • Insensitive to B-field
    • Large area.
    • Low cost.
  • CsI wavelength cutoffs are a strong limitation:
    • CF4 gives 50 p.e./meter (measured by HBD) in un-focussed.
    • CF4 gives only 20 p.e./meter with mirror (removes light below 150 nm)
    • C4F8O gives only 10 p.e./meter (limited by cutoff of ~165 nm)
  • Options for high B-field RICH detector not entirely clear.

Nikolai presented a straw model detector:

  • CDF magnet.
  • 4 Silicon planes + fast TPC + 3 GEM planes
  • momentum resolution fine in barrel.
  • momentum resolution insufficient close to beam pipe.
  • Long list of options (see slides)


FURTHER DISCUSSION:

There was an open discussion on how to proceed with simulation issues. The general strategy was to identify a so-called Golden Channel measurement that drives the detector performance.

  • B-field of CDF magnet likely culprit in P-resolution.
    • Simulations will be done with higher B.
    • Simulations will look at pixels forward.
    • Further suggestions will be made to the mailing list.


OTHER BUSINESS:

  • Next week on Monday Tom will present a proposed talk for R&D Proposal Call.
  • We will schedule a second meeting between then and the actual presentation to account for comments made Monday.

See you next Monday...

Thanks! Tom