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EPIC Far-Forward Engineering and Design Meeting

→ US/Eastern
Description

Wiki: https://wiki.bnl.gov/EPIC/index.php?title=FarForward

 

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Meeting topics:

- updates on B0 tracker and EMCAL support and insertion scheme
- discussion of the readiness for the April review
 
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B0 discussion

  • Discussion of insertion mechanism for the subsystems, and how to breakup the EMCAL to make insertion possible.
  • Big question is cooling:
    • Cooling plates + tubes on the periphery and on the back.
  • Work should be done to investigate heating due to energy deposition.
    • Simulations exist, but need to be used (including synchrotron radiation) to assess the amount of heating we might see as a function of distance from the beam pipe.
    • Seems like crystals near the beam pipe are most-affected, but cooling is physically further away.
  • Also need to ensure we maintain safe distance from beam pipe during installation -- mechanical safety for this?
  • Need to also understand better various temperature gradients inside the bore.
    • With tight tolerances things like thermal contraction and expansion could be a challenge.

 

Readiness for April review (ZDC, lumi, low-Q2)

  • Things are mostly ready --> some issues with the model for the ZDC and different CAD software.
    • Still some work to do to resolve the issue.
  • We will present ZDC option with two tables as our baseline.
  • Karim has a model for a railing system to move the lowered ZDC out of the way - needs to be integrated.
  • Low-Q2 tagger is ready for the presentation.
  • Lumi -- latest model of dipoles ready; still need some information on support infrastructure. 
    • Lumi dipoles will see a high synchrotron radiation load. Discussion about shielding for the dipoles -- Andrii recommends that tungsten shielding (2mm) be applied to beampipe near there to protect the dipole magnets.
    • Charlie recommends to keep design as-is, but allows for addition of tungsten shielding later, if needed.
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