Minutes from ISOLDE Physics Group meeting, 27th April 2016.

No comments to the minutes from the previous PG meeting: 

Technical news:

ISOLDE:

• GPS:
  
  • Last IS589 were collections of 210-Fr  (surface ionised) from a used UCx target.
  • Due to some running issues, the REX tests could not take place.
  • On Wednesday afternoon a problem with the mass controller was observed. The application showed “unable to communicate”. A fault  was displayed from the Magnet power converter communication, and the first line electrician was called. But in fact it was a software error in the FESA class. The reason is not yet fully clear.
    • It looks like this bug has been fixed, but has to be followed up. 
  • The GPS VISTAR is now updated with the GLM/GHM deflector plates status included.

• HRS:
  
  • The mass control application has been updated.

• Control room:
  
  • The radiation monitors cannot be displayed – issues with the login.
    • This screen information is important for safety, and also now since possible alarms cannot be heard from the hall if you are running entirely from the new control room.
    • This needs to be fixed ASAP and RP have been contacted.

• RILIS:
  
  • A good run with Cu beams with the new “on-call mode” in case of issues with the lasers.
    • No coating on the optical mirrors observed from the light power UV lasers.
  • Setting up for Mg on GPS and preparing for Ni.
  • Performed test on laser ionised Fe – in association with MR-TOF –  with good yield enhancement/result.
  • Improvement in the references offer the USERS to follow up on the RILIS laser performance and power: A reference picture has been added to the RILIS status to better judge issues.
    • Also the power levels have been added (for the RILIS supervisors: they can tell if it is time to change the dye etc.).

• REX/HIE:
  
  • A dripping water leak was discovered in time on the new 9-gap RF-amplifier.
    • Water was been removed and possible damage is being inspected.
      • It does not look to be too serious.
  • REX is setting up to get the beam into the trap.

• Target:
  
  • Production is as planned. Targets for the next two runs are already completed.

Physics:

• CRIS measured neutron rich 76-78Cu with the CRIS technique (IS531).
  
  • They measure hyperfine structures for extraction of spin, quadrupole and magnetic moments.
  • Went well and measured 76-78Cu relatively early, so they expanded to measure more Cu isotopes (63-75Cu).
  • Saw target yield reduction and 77-Cu could not be repeated at the end of beam-time.
  • Used the protons on the converter for best result, as no increase in 77-Cu yield was observed with protons on target.
• Mg collection on GHM for emission channelling.
  
  • Measurements are going well, but due to contamination of beam (about 50% Al) the group could likely not repeat an earlier observation regarding fluency dependency (a different target was used).
    • Different heating of the line/target was applied to try and minimise the Al contamination.
• COLLAPS is ready to measure Ni in the N=40 area.
  
  • A new target with a graphite line will be used. An old target is on standby in case this new target does not behave as expected.
  • Aim to measure charge radius, electrical moment etc.
  • A new DAQ system will be used (more sensitive) in parallel.
  • New laser system and scheme will be used.

Safety:

• Training:
  
  • The training on the 10. May is cancelled, but is moved to 11. May.
• VISITS:                 
  
  • No visits this week.
  • Remember to report any/all visitors to ISOLDE.
  •  

AOB:

• 275:
  
  • New floor in old SSP lab has been installed.
  • Now that 275 again is available for space, items at long term storage will be inspected for possible return.
    • First step is to identify what is in long term storage.
  • Test benches will be setup.
  • NOTE that the building is now a NON-Radioactive zone, so no RP-sources can be used in 275.

• 508:
  
  • Stuff and machines under staircase have been removed.
  • A new table for the kitchen will arrive.
  • Mark your shelf in the kitchen cupboard.
    • Every fixed experiment/group will have one shelve.
    • There will be marked space for USERS in the cupboard.
  • Please help keep the kitchen clean and to start and empty the dishwasher.
    • Use 20 min fast programme.

• ISOLDE-SAS:
  
  • The new storage for used dyes/waste liquids will be moved to a better permanent position outside the SAS.

The next ISOLDE PG meeting will be held on 04. May 2016 followed by a seminar by

Steven Karataglidis, "Mapping the densities of exotic nuclei".

Minutes taken by ~TEM