GlueX Target Design Mtg, Nov 19, 2013

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Present: Dave Meekins, Mark Ito, Josh Pierce, Tim Whitlatch, Floyd Martin, Chris Keith, James Brock

Agenda

  • Test results
  • Cryo hardware status
  • Gas system status
  • Scattering chamber status
  • 3D model/drawings
  • Target/Start counter interface
  • Vacuum system update
  • Controls status
  • Installation cart update

Info=


Minutes

  • There was a successful horizontal test of the "production" target using neon instead of hydrogen.

If only the target was filled with liquid, there was a small amount of boiling (bubbles) in the liquid. When subcooled (fill liquid up to condenser), the boiling ceased. Is boiling acceptable? A slight change in controls logic would be needed. If bubbling is not allowed, we will need 120 gallon tank to house the gas. Is this acceptable to place in the Hall?

  • Target group plans on making a new cell and install thermometry in the liquid.
  • The target group tested using a straight aluminum entrance window tube (as opposed to a tapered torlon as designed). This worked well. Is this acceptable from a physics point of view (material and Halo)?
  • The gas panel is ready to install on the cart. The cart needs to be designed to hold the gas tank(or 2 60 gallon tanks), the gas panel, controls rack and refrigerator.
  • The flange for attaching the Start Counter changed slightly but not at the interface. Need to double check geometry.
  • Target group will make the scattering chamber.
  • The flanges for the vacuum chamber need to be outfitted with proper flanges.
  • We discussed that according to P6, we needed a working target by April 2014 (it is actually August 2014)
  • We still need the 2" vent design
  • Target group will not work much on the Target until January as they have work for Hall A. We will then assemble the entire system in the EEL.

Action Items

  • Mark to determine whether boiling in the target is acceptable
  • Mark to determine id a straight aluminum tube for the entrance window is acceptable
  • Floyd to get with Dave M. to finalize the cart design and get it fabricated
  • Dave M. to get with Dave Kausch to determine if 120 gallon hydrogen gas tank in the hall is acceptable (in writing)
  • Floyd to finalize vacuum flange designs and get fabricated.
  • James and Floyd to get together to double check Start Counter attaching flange geometry and send out for fabrication
  • Floyd to complete design for 2" exhaust vent
  • All to read and give feedback to Dave M. on FMEA
  • Tim/Chris need to figure out a date for the readiness review ( probably after system is assembled in EEL)