Wednesday June 11, 2014

From Ciswikidb
Revision as of 19:15, 12 June 2014 by Suleiman (talk | contribs)
Jump to navigation Jump to search

We will meet in TL 2236 on Wednesday June 11 at 3:30 pm EST.

For those calling in we'll use the ReadyTalk audio conference system.

1. Dial Toll-Free Number: 866-740-1260 (U.S. & Canada)
2. Enter 7-digit access code 4402297, followed by “#”

Agenda:

1 - Bubble Chamber progress at Argonne

2 - (Grames) Beam line progress at JLab:

* Coordination meeting (May 28) media:140527_BubbleInstallKickoff.pptx media:140527_BubbleInstallKickoff.pdf
* Review final girder components
Assembly media:JL0015130 COLLIMATOR TABLE ASSEMBLY.pdf
Radiator media:JL0015733 CU RADIATOR WINDOW ASSY.pdf
Collimator media:JL0015777 CU COLLIMATOR.pdf
* BPM bench top calibration using Goubau surface wave transmission line (G-line) technique

3 - (All) How to proceed with readiness review (beam line, safety, radiological, commissioning plan, ?) so the beam line is ready for commissioning at the end of summer ?



Notes from this meeting:

  • PAC41 listed the Bubble Chamber as a High Impact experiment.
  • Bubble Chamber is filled with N2O.
  • When attempted to vent the beamline to install the Fast Valve, it was found that the valve immediately after the 1/4 cryo-unit is leaking. It was decided to warm the 1/4 cryo-unit to room temperature and replace the leaky valve.
  • The new magnet alignment fixture has been built.
  • Dave and Brad will decide on who and where the collimator will be built. The design is complete and the drawing is ready.
  • Radiator design has been completed.
  • The chamber location may have to be pushed downstream by an inch or two to allow for the thermal insulation. The chamber will be running at -12 to -14 °C. Instead of having the Survey and Alignment group marking 4 points on the floor for the chamber, they will mark two parallel line.
  • The beamline two BPMs will be calibrated using G-line technique. The goal is to improve the absolute beam position measurements needed for the energy determination.
  • Rolf and Arne will decide on the exact framework of the Bubble Chamber Readiness Review but expected to be like PEPPo:
  1. Conduct of Operations (COO)
  2. Experiment Safety Assessment Document (ESAD)
  3. Radiation Safety Assessment Document (RSAD)
  4. Beamline Review
  5. Bubble Chamber Safety Review:
    1. Pressure System
    2. Mercury
    3. Laughing Gas
    4. Operational Safety Procedure (OSP)
  • Claudio, Simona, Darren, and Wouter have started the work on GEANT4 simulation of the Bubble Chamber.