Minutes from ISOLDE Physics Group meeting, 17th August 2016.

No comments to the minutes from the previous PG meeting: 

Please read the minutes.

Technical news:

• Overall it has again been a smooth and good week at ISOLDE.

ISOLDE:     

• HRS:
  
  • Delivering Al-beam for COLLAPS.
  • They had an overall good run.
  • They were running 2-3 days extra, due to problems with the nano-UCx target that was not installed.
  • CRIS will soon take Ra-beam next and are ready for stable beam.

• GPS:
  
  • Delivered Mg for ISOLTRAP from a SiC target with VADLIS (suppress alkaline Na).
  • Interesting tricks were performed with the beam production.
    • With RILIS only Na and Mg was released, while the used of VADLIS included other beams. This was observed  with the MR-ToF
    • Playing with the voltage it can stop surface ion elements.
    • Used VADLIS to produce 23Na and 21Ne.
  • Beam production was relative easy.
  • Target heating dropped once, but was fast recovered.

• RILIS:
  
  • The combination of “VADLIS” and MR-Tof at ISOLTRAP is very good and interesting method to very accurately determine the beam purity and the contaminations.

• REX/HIE:
  
  • The beam permit for HIE and acceleration through the cryo-modules was approved on Friday.
  • The beam from REX can now be accelerated in the the cryo-modules.
  • Now the beam is gradually being post-accelerated and tuned through the HIE cryo-modules. 

• Targets:
  
  • The nano-UCx (prototype) #581 target was not installed as it was a bad target, due to issues with a new polymer material that turned out to be very reactive.
    • The new polymer was used to speed up production time.
    • This is to be investigated.
  • Used targets will be installed on both HRS and GPS for the next beam time.

Physics:

• ISOLTRAP:
  
  • Using the MR-tof the purity and beam contaminations could be well identified.
  • The extra 2-3 days of beam time (due to the bad nano-UC target) was used to identify and reduce systematic errors.
  • Tested a new phase-imaging method in order to achieve even higher precision.

• COLLAPS:            
  
  • Saw hints of 26Al (similar to yield database). It is produced.
    • Complicated due to the similar lifetime of 26Na.
• CRIS:
  
  • They want to study the hyperfine structures of Radium isotopes.

Safety:

• 275:
  
  • The different rooms have been measured by RP in order to declassify the building.
  • The report for declassification has been made.
    • Now it is awaiting approval for the full declassification of the building.
• HIE:
  
  • Please clean around the HIE area and the ISOLDE-SAS. This is important for the beam permit.

AOB:

• 508:
  
  • The door handle has been fixed (ground floor lab entrance).

• Summer students
  
  • The summer students presentations were:
    • Ian Yap Chang Je: “Feasibility test: Mossbauer spectroscopy of High Charge State of 57-Fe”.
    • Giannis Savva: “Setting up the photoluminescence lab at ISOLDE & PAC spectroscopy for BIO physics experiments”.
    • Diana Valverde: “NMS Summer student program at ISOLDE”.

The next ISOLDE PG meeting will be held on 17 August 2016 followed by two summer student presentations from: Thomas Guldager Skov, and Ingrid Strandberg.

Minutes taken by ~TEM