Minutes from ISOLDE Physics Group meeting, 14th October 2015.

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

Technical news:

All in all a good week at ISOLDE with only minor issues.   

• ISOLDE:
  
  • There was a INCA software update:
    • The update only had a few issues, which have since been worked out.
  • The VISTAR screen has shown wrong/inconsistent readout values for high voltage
    • Problem appeared and disappeared suddenly. Reason unknown. To be investigated, and keep in mind to double check values (especially if beam is lost).   
  • Monday a large part of vacuum in the low energy section had bad vacuum interlocked due to a power trip in a vacuum control rack.
    • Vacuum was restored after 1-2 hours.
  • CRANE: It will undergo an upgrade for less swinging before taking out the Cryo-module.
    • Can only be used on Mondays and Fridays (+ weekends) in the next coming weeks (estimated 2-3 weeks).
• GPS:
  
  • Faraday cup FC558 which had the in/out vacuum problem was disconnected and will be repaired today.
• HRS:
  
  • Due to the killing of the target from last week’s power cut a new target was installed early and is ready.
    • IDS can start taking beam earlier than scheduled. 
• RILIS:
  
  • Reporting no problems during Ca-run.
  • Investigated the “cross-talk” between mass markers K and Ca, and a relation/link was confirmed. To be investigated further.
• REX/HIE:
  
  • Looking fine, taking Rb stable beams.
  • Low energy testing of the installation.
  • All 5 cryo modules are operational, and are running. Not yet an optimal setup (not ideal phasing of the cavities) but will allow for beam this year.
  • Low vacuum Miniball after XT01, It is possible to run. Small leak should be identified.
  • XT02: Stripping foils installed.                            

Physics:

• COLLAPS: Ca-run
  
  • They were measuring hyperfine structure on 52,53, (and 54)-Ca.
  • Did not get the yields needed to get good statistics.
    • 52Ca (T_1/2 = 2.2 s) yields matched what was measured in the ISOLDE tape station.
    • 53Ca (T_1/2 = 461 ms) was 2 orders lower and 54Ca (T_1/2 = 107 ms) even lower.
  • Had some target problems during run. Target and line tripped a few times.

• IDS: Ready to take 130-132Cd-beams. Same target as the run/attempt in July.

508:

• A WC sink was used to wash metal parts destroying the sink. A new will be ordered.
  
  • Please use the sink in the workshop or chemical lab for cleaning material in the controlled area.
• Door between ISOLDE and 508 labs have failed. It will be taped open.
  
  • New crash bars will be installed.       

Safety:

A chamber was moved (by private car) from 275 to the ISOLDE workshop the 8^th of October. The chamber had not been properly checked for contaminations. Luckily the workshop made a check before working too much on the chamber. It was contaminated inside with 22Na. Work was stopped and a worker got one hand contaminated. Please:

• USE the CORRECT channels and procedures for transport and RP checks.
• This incident falls back on all of ISOLDE giving us more restrictions.
• Parts that you know have been in the ISOLDE beam line should be RP checked.
• Do not move parts between the b508 zones (top and bottom floor).

The ISOLDE “in-house” people are also responsible to inform visiting USERS about proper and safe behaviour at ISOLDE.

ISOLDE:

• The zone separation (ISOWORK fence) will be removed at the end of October. From 16 November the fence will return (due to the construction work needed for the removal of the cryomodule), but not the ISOWORK classification. Once again, on passing the fence you will be required to wear safety helmet and shoes.
•  

HIE:

There will accelerated beam tests of the HIE installation.

• Please make a limited used of the SAS entrance, and movement in the area. Please keep using the Jura entrance.
• Since the radiation level only have been simulated the exact amount that will be produced is uncertain.

GLM:

                Many concrete blocks will be moved, so limit the movement in the area during

275:

• A zone for RP checked and released parts was suggested, but the space in 275 is not there at the moment.
• Plans to have metallic cupboards installed – 2 or 3 for each experiment.

AOB:

ENSAR: ISOLDE has been entitled for ENSAR support from 1^st October 2015, but will take about 1 month to open the account and release the money, since it need the final signing.

• Please contact Jenny (ISOLDE Secretary) to make the ENSAR request for your ISOLDE project.

Separator course: Will be on the GPS. Maybe also HRS if enough interest. 23^rd November.

ISOLDE access training: The courses are on Tuesdays. The day is being evaluated and could be moved, depending on the feedback from users and “statistics”.

The next ISOLDE PG meeting has been announced, and will be Wednesday 21st October at 14:00. There will be a seminar from Ania Kwiatkowski. The title is “The TITAN Facility at TRIUMF: precision experiments with ion traps”.

Minutes taken by ~TEM