Difference between revisions of "May 31, 2018"

From Hall A Wiki
Jump to: navigation, search
 
Line 53: Line 53:
 
'''Kerr discussion. '''
 
'''Kerr discussion. '''
 
Target polishing continues. Dave Gaskell informed me that Dave Meekins said the new target ladder is in the queue at the JLab machine shop.  
 
Target polishing continues. Dave Gaskell informed me that Dave Meekins said the new target ladder is in the queue at the JLab machine shop.  
 +
 
Update from Javier: " The magnet status is as follows. The magnet has been leak checked three times - all of them negative. This leaves us with two possibilities only - either the magnet was not pumped properly the previous time or the leak is internal (through the pulse-tube refrigerator). We do not think that the last option is likely but we will check for it when we start the cool down of the magnet. A large turbo pump has been connected to the magnet through a pressure relief port to get, hopefully, better pumping than that provided by the standard port which has a small diameter tube. Concerning the electrical power for the compressor/water chiller - after various misunderstandings with our facilities department, Jack/Ethan ordered some electrical connectors that should help us start the system soon.  
 
Update from Javier: " The magnet status is as follows. The magnet has been leak checked three times - all of them negative. This leaves us with two possibilities only - either the magnet was not pumped properly the previous time or the leak is internal (through the pulse-tube refrigerator). We do not think that the last option is likely but we will check for it when we start the cool down of the magnet. A large turbo pump has been connected to the magnet through a pressure relief port to get, hopefully, better pumping than that provided by the standard port which has a small diameter tube. Concerning the electrical power for the compressor/water chiller - after various misunderstandings with our facilities department, Jack/Ethan ordered some electrical connectors that should help us start the system soon.  
  

Latest revision as of 12:34, 31 May 2018

Back to Main Page >> Moller Page >> Moller Weekly Meeting Index

previous meeting << >> following meeting


Moller DocDB Meeting

Original Moller Polarimeter Page

Moller ELog


Connection details:


Meeting URL https://bluejeans.com/388466836

Meeting ID 388 466 836

US toll free phone 1.888.240.2560

Dial in, type in the meeting ID and then press ##




Schedule

1. GEANT4 simulation update -Eric K.[ ELOG]

2. GEANT3 simulation update -Bill H.[ slides]

3. Discussion of Kerr activities




Minutes


Discussion of GEANT4. Eric implemented Bill's quad/dipole field settings into G4. Hits plot looks rotated and lots of events hitting quads and collimators. He will start by turning off the target holding field to investigate cause.

Discussion of GEANT3. No new discussion of G3.

Kerr discussion. Target polishing continues. Dave Gaskell informed me that Dave Meekins said the new target ladder is in the queue at the JLab machine shop.

Update from Javier: " The magnet status is as follows. The magnet has been leak checked three times - all of them negative. This leaves us with two possibilities only - either the magnet was not pumped properly the previous time or the leak is internal (through the pulse-tube refrigerator). We do not think that the last option is likely but we will check for it when we start the cool down of the magnet. A large turbo pump has been connected to the magnet through a pressure relief port to get, hopefully, better pumping than that provided by the standard port which has a small diameter tube. Concerning the electrical power for the compressor/water chiller - after various misunderstandings with our facilities department, Jack/Ethan ordered some electrical connectors that should help us start the system soon.

In the mean time, the accelerator network fiber was connected to the building and Ethan brought all the lines to the magnet and the various systems connected. Ethan also contacted the person in charge of the EPICS target motion driver to start debugging the new mechanics/electronics brought by Henry but I believe that person has not started working on it yet.

Cheers - Javier"