Difference between revisions of "August 12, 2010 CDC Meeting"

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* Manpower *
 
* Manpower *
 
* Jim Fochtman presentation of cryo design *
 
* Jim Fochtman presentation of cryo design *
 +
* Project Status *
  
 
==Discussions==
 
==Discussions==
−
**In attendance GW. Crahen, G. Biallas, M. Ito, J. Fochtman, T. Carstens, C. Hutton, V. Razmyslovich, J. Lagner, F. Martin, W. Sachleben, R. Getz, J. Foyles, M. Stevens, R. Bunton, G. Humble, C. Heck, D. Butler, K. Sullivan Tim Whitlatch
+
**In attendance GW. Crahen, G. Biallas, M. Ito, J. Fochtman, T. Carstens, C. Hutton, V. Razmyslovich, J. Lagner, F. Martin, W. Sachleben, R. Getz, J. Foyles, M. Stevens, R. Bunton, G. Humble, C. Heck, D. Butler, K. Sullivan, Tim Whitlatch
−
* Discussed incident in Hall A of someone bringing in a water bottle. No food or dring in Rad controlled areas!
+
* Discussed incident in Hall A of someone bringing in a water bottle. No food or dring in Rad controlled areas! *
−
* Discussed outer shell - consists of 2 1.5mm thk aluminum half shells rolled to shape. These will be glued to the G10 outer rings. The outer rings consist of G10 strips formed and glued in place. The outer shell gaps will be covered with copper tape (non-conductive adhesive) and then covered with another tape to ensure sealing (TBD)
+
* Discussed stop work section of ES&H manual *
−
* Does the outer shel need to be grounded to the upstream aluminum plate?
+
* Discussed space needs, manpower needs and probable move of eng/des staff to 2nd floor of arc *
−
* Revisited gas flow. Gas enters through tubes (.25 inch) to the downstream plenum, then into straws, then into upstream plenum, then to inner volume surrounding straws and exits from there. We discussed the current gas tube design and will need to revisit as CMU had some concerns. A question was considered as to use plastic or aluminum tubes and how they should be attached (glue, compression fittings etc...
+
* Jim presented cryo design (see action items below) *
−
* Discussed upstream standoffs (through alum disk from spacer rods to polycarbonate plate). CMU suggested to remove gas seals from the both ends and use .05 thk teflon washers to seal (and possible prevent rotation of disc during torquing). Also remove studs on ends so polycarbonate plate can be installed easier. Also, it was decided to get the standoffs made now so CMU does not have to change out for shoulder bolts at a later time. Jlab will have standoffs made. 3 of the inner standoffs will have studs.
+
−
* Plastic feedthrus should be ready for checking in september
+
−
* Crimp pins from Acumetrics were returned to get the inner holes re cleaned (ultrasonically)to clear the inner holes. CMU will re check when they return so we can have a future alternate vendor.
+
−
* Straw tubes scheduled for shipment by August 29th
+
  
−
==New Action Items==
+
==Action Items==
  
−
* Produce drawings and fabricate 12 standoffs for upstream gas plenum (JLAB)
+
* Determine new positions of cryo transfer line supports and feedback to civil (Jim/Tim)*
−
* Review drawings for standoff for fabrication (CMU)
+
* Correct platform height and location for new expansion can (make sure there is room to stab u-tubes)(Jim/Rich)*
−
* Discuss grounding needs of outer shell to upstream aluminum disc with Fernando (JLAB)
+
* Need to develop a leak check and assy plan for cryo lines (Jim/Tom)
−
* Review current gas tube assembly and suggest an alternative (CMU)
+
* Consult with Scot and Mark on cryo instrumentation (Jim)
−
* Look at sealing tape alternative for covering outer shell gap (CMU)
+
−
Tim Whitlatch
+
−
* Gary is currently testing samples for gluing the inner shell to the inner ring using the spare inner shell supplied by JLAB
+
−
* Discussed outer shell - consists of 2 1.5mm thk aluminum half shells rolled to shape. These will be glued to the G10 outer rings. The outer rings consist of G10 strips formed and glued in place. The outer shell gaps will be covered with copper tape (non-conductive adhesive) and then covered with another tape to ensure sealing (TBD)
+
−
* Does the outer shel need to be grounded to the upstream aluminum plate?
+
−
* Revisited gas flow. Gas enters through tubes (.25 inch) to the downstream plenum, then into straws, then into upstream plenum, then to inner volume surrounding straws and exits from there. We discussed the current gas tube design and will need to revisit as CMU had some concerns. A question was considered as to use plastic or aluminum tubes and how they should be attached (glue, compression fittings etc...
+
−
* Discussed upstream standoffs (through alum disk from spacer rods to polycarbonate plate). CMU suggested to remove gas seals from the both ends and use .05 thk teflon washers to seal (and possible prevent rotation of disc during torquing). Also remove studs on ends so polycarbonate plate can be installed easier. Also, it was decided to get the standoffs made now so CMU does not have to change out for shoulder bolts at a later time. Jlab will have standoffs made. 3 of the inner standoffs will have studs.
+
−
* Plastic feedthrus should be ready for checking in september
+
−
* Crimp pins from Acumetrics were returned to get the inner holes re cleaned (ultrasonically)to clear the inner holes. CMU will re check when they return so we can have a future alternate vendor.
+
−
* Straw tubes scheduled for shipment by August 29th
+
−
 
+
−
==New Action Items==
+
−
 
+
−
* Produce drawings and fabricate 12 standoffs for upstream gas plenum (JLAB)
+
−
* Review drawings for standoff for fabrication (CMU)
+
−
* Discuss grounding needs of outer shell to upstream aluminum disc with Fernando (JLAB)
+
−
* Review current gas tube assembly and suggest an alternative (CMU)
+
−
* Look at sealing tape alternative for covering outer shell gap (CMU)
+

Latest revision as of 15:53, 18 August 2010

Meeting Time and Place

Thursday Aug 12, 2010 at 8:15am At Jefferson Lab, the meeting will be held in room ARC 428

Agenda

  • ESH&Q minute
  • Announcements
  • Lehman review preparations *
  • Space needs *
  • Manpower *
  • Jim Fochtman presentation of cryo design *
  • Project Status *

Discussions

    • In attendance GW. Crahen, G. Biallas, M. Ito, J. Fochtman, T. Carstens, C. Hutton, V. Razmyslovich, J. Lagner, F. Martin, W. Sachleben, R. Getz, J. Foyles, M. Stevens, R. Bunton, G. Humble, C. Heck, D. Butler, K. Sullivan, Tim Whitlatch
  • Discussed incident in Hall A of someone bringing in a water bottle. No food or dring in Rad controlled areas! *
  • Discussed stop work section of ES&H manual *
  • Discussed space needs, manpower needs and probable move of eng/des staff to 2nd floor of arc *
  • Jim presented cryo design (see action items below) *

Action Items

  • Determine new positions of cryo transfer line supports and feedback to civil (Jim/Tim)*
  • Correct platform height and location for new expansion can (make sure there is room to stab u-tubes)(Jim/Rich)*
  • Need to develop a leak check and assy plan for cryo lines (Jim/Tom)
  • Consult with Scot and Mark on cryo instrumentation (Jim)
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