Difference between revisions of "GlueX Target Meeting, May 17, 2011"
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Talks can be deposited in the directory <code>/group/halld/www/halldweb1/html/talks/2011-2Q</code> on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2011-2Q/ . | Talks can be deposited in the directory <code>/group/halld/www/halldweb1/html/talks/2011-2Q</code> on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2011-2Q/ . | ||
+ | |||
+ | =Minutes= | ||
+ | |||
+ | Present: Hovanes Egiyan, Jim Fochtman, Mark Ito, Chris Keith, Tim Whitatch | ||
+ | |||
+ | • 500 gauss on cold head is max. Is this ok | ||
+ | • cool in one shift | ||
+ | • average diameter of target: is that OK? needs to be decided | ||
+ | • length of target: can this be finalized | ||
+ | • Max OD of scattering chamber driven by start counter, CDC in turn | ||
+ | • what is alignment requirement for target? | ||
+ | • how well do we have to know the density of the liquid | ||
+ | |||
+ | Additional requirements | ||
+ | |||
+ | • quality of scattering chamber vacuum: prevent freezing material on target | ||
+ | • flammable gas compatible | ||
+ | • interlock nearby electrical systems/ignition sources if target cell ruptures | ||
+ | ∘ hydrogen gas sensors will be needed | ||
+ | ∘ pressure switch on vacuum chamber | ||
+ | • stainless steel tubing | ||
+ | • welding whenever possible | ||
+ | |||
+ | P&I | ||
+ | |||
+ | • Tanks outside connect to single line | ||
+ | • vent line to go outside hall, manual valve | ||
+ | • vacuum pump needs explosion proof motoer | ||
+ | |||
+ | P&I 2 | ||
+ | |||
+ | • mount gas panel outside hall, changing gas could be done without access, still manual | ||
+ | |||
+ | Other considerations | ||
+ | |||
+ | • could put gas panel and control electronics in the "target" rack | ||
+ | • electronics | ||
+ | ∘ temperature controller | ||
+ | ∘ nice: local visual read-back for pressure transducers | ||
+ | ∘ turbo controller for scattering chamber | ||
+ | ∘ vacuum gauge controller | ||
+ | • these designs allow automatic transition to gas in cell, but not vacuum | ||
+ | |||
+ | Next frontier | ||
+ | |||
+ | • mechanical design for target condenser, cell, scattering chamber | ||
+ | • may not want to have cold head to provide mechanical support | ||
+ | • Jim will contact Chris to work out issues before the next meeting |
Revision as of 13:01, 18 May 2011
Location, Time
Tuesday, May 17, 2011
1:00 pm EST
JLab: CEBAF Center, Room F224/225
Agenda
- Review minutes from previous meeting: all
- Target Work Reports: all
- Target Requirements Target Requirements Target Layout
- Target P&I Diagrams
- MOU status: Mark
Communication
Telephone
To connect by telephone:
- dial:
- US and Canada: (866)740-1260 (toll free)
- International: (303)248-0285 (toll call) or look up toll-free number at http://www.readytalk.com/intl
- enter access code followed by the # sign: 3421244#
Slides
Talks can be deposited in the directory /group/halld/www/halldweb1/html/talks/2011-2Q
on the JLab CUE. This directory is accessible from the web at https://halldweb1.jlab.org/talks/2011-2Q/ .
Minutes
Present: Hovanes Egiyan, Jim Fochtman, Mark Ito, Chris Keith, Tim Whitatch
• 500 gauss on cold head is max. Is this ok • cool in one shift • average diameter of target: is that OK? needs to be decided • length of target: can this be finalized • Max OD of scattering chamber driven by start counter, CDC in turn • what is alignment requirement for target? • how well do we have to know the density of the liquid
Additional requirements
• quality of scattering chamber vacuum: prevent freezing material on target • flammable gas compatible • interlock nearby electrical systems/ignition sources if target cell ruptures ∘ hydrogen gas sensors will be needed ∘ pressure switch on vacuum chamber • stainless steel tubing • welding whenever possible
P&I
• Tanks outside connect to single line • vent line to go outside hall, manual valve • vacuum pump needs explosion proof motoer
P&I 2
• mount gas panel outside hall, changing gas could be done without access, still manual
Other considerations
• could put gas panel and control electronics in the "target" rack • electronics ∘ temperature controller ∘ nice: local visual read-back for pressure transducers ∘ turbo controller for scattering chamber ∘ vacuum gauge controller • these designs allow automatic transition to gas in cell, but not vacuum
Next frontier
• mechanical design for target condenser, cell, scattering chamber • may not want to have cold head to provide mechanical support • Jim will contact Chris to work out issues before the next meeting