Minutes from ISOLDE Physics Group meeting, 17 June 2015.

There were no comments to the minutes from the previous PG meeting last week. 

Technical news:

• HRS:
  
  • A new UCx target has been installed for CRIS and ISOTRAP.
    • The target group would like to investigate this new target when possible (because it is a new UC batch).
  • There is a delay of the target and stable beam, but physics should start as originally planned.
  • VITO and CRIS had stable beam tuning last week and transmission of 85% and 30% was obtained, respectively. This is normal for CRIS to have 30% (in FC4) and for VITO the 85% is a good start.
  • Magnet cycling problem was solved by a software fix. If still problems, try restart magnet and/or restart PC.
  • ISCOOL still gives problems above 30 kV.
    • Vacuum problem is suspected to originate from a leaking FC in front of ISCOOL. The FC cannot be investigated or exchanged since there is no spare FC and the A-Class lab of building 170 needs to be fully functional to repair the FC backup.

• GPS:
  
  • SSP users had a good Cd-beam time run, with a pure Cd beam.
    • Good PAC results from the setups.
    • RILIS found an offset of 5 mm during the Cd ionisation.
  • Bio-Physics did not have a good run due to target problems with ISOLDE. A huge effort was made to get beam. 3 different UCx targets were installed in short time.
    • First target had a leak (bad vacuum) above 200 Amps.
    • Second target was shipped fast from storage to ISOLDE. The rush likely broke the target line during transport. Will never repeat the rush again.
    • Third target is the one that crashed onto the HRS front end and behaves not normal (i.e. yield drops shortly after taking full proton intensity).
  • Ag will run until Friday and try make the best out of the beam that can be extracted.

• HIE:
  
  • The cryomodule shielding slowly approaches LN2 temperature.
  • All progress looks good and no leaks detected.
  • First beam transport from the REX RFQ to the first diagnostic box on the line in the tunnel was successful (90% transmission).

• B-508:
  
  • The Cd run was a good test of the new SSP labs and 508 building and it was learned that improvements can still be made.
    • The furnace room for e.g. annealing of samples is tight, gets very warm and maybe not safe.
    • The transport of implanted samples to the SSP labs is not optimal.
  • The installed cooling of SSP labs is working well.
  • Ventilation in CRIS and COLLAPS laser and DAQ rooms produces water drops – do NOT turn on.
    • Ticket has been made for fixing this.
  • The detector room needs to be emptied from equipment placed there as temporary storage place since it will hold neutron detectors that are soon to arrive.
  • The external doors are difficult to open because of the bad-quality of crash bars. They should be under warranty so DIMENSIONE should get them fixed. Another ticket has been made.
    • Door from ISOLDE to 508 labs has been taped in order not to lock.
    • The door on the 1^st floor needs a hard pull on the handle to open it from the outside.

AOB:

• The ISOLDE summer students have started arriving and where shortly introduced. A warm welcome and we are looking forward working with you.
• Next week Magda will give a short ISOLDE facility introduction for the summer students
  
  • Wednesday at 13.30, before the group meeting.
• A demonstration of the new Auto-tuner for beam optics will be given Friday (19.06.15) at 14:00

The next ISOLDE PG meeting has been announced, and will be next Wednesday 24 June at 14:00. Followed by the seminar of Steven Karataglidis entitled "Alpha scattering in the MCAS."

Minutes taken by ~TEM