Minutes from the ISOLDE Physics Group Meeting June 12, 2014
No comments to the minutes from the ISOLDE Physics Group Meeting on May 28, 2014.
TECHNICAL NEWS:
- GPS and HRS front ends are now almost completed, with only minor work still to be done. The Faraday cages in both front ends will have to be dusted off for high voltage reasons. Call for volunteers to take part in the cleaning process will be organized soon.
- Work on the ventilation system and commissioning of the new target robots is going-on this week and at the beginning of the next week.
- GPS separator is in reasonable shape now, hosting a dummy target with different mass-markers for RILIS laser tests. It has been reported that FC20 has problems with compressed air and the wire grid 110 is not working at all. Both of them will be repaired or replaced only during the next shut down.
- HRS vacuum leak was finally localized at the connection between the section and the front end. A large collar holding the vacuum flanges together was found to be heavily corroded and not holding vacuum any more. It is now being replaced.
- HRS is now leak-tight. The magnet has been moved back to its original position and its alignment will be done tomorrow morning (June 13). If everything works fine, the technical team will try to have HRS entirely under vacuum already tomorrow afternoon. If there are no further problems, the HRS separator should be ready to go next week.
- Unfortunately, during the leak-testing the vacuum section at the 90° magnet was heavily over-pressured damaging some of the bellows between the neighboring sections. The vacuum chamber, where the RILIS laser window connects, is now misaligned due to the distortion of these bellows, causing the misalignment of the RILIS laser window itself. Since there is no direct and quick way of checking the alignment, the technical team decided to put everything back together and hoping that nothing else has been displaced.
- All target heat controls have been fixed and are working correctly right now. Only some of the RFQ high voltage power supply controls are still not working and giving random feedback. - Welding of the water pipes at the target area is still not completed putting on hold the commissioning of the new target robots rails and the GPS robot itself.
- The GHM turbo controller has been exchanged.
- The GLM and GHM deflector positioning systems have been replaced and have to be recalibrated. Beam is needed to proceed with that.
- RILIS team did the first test on laser ionization of Ba off-line. To be continued on Monday on the GPS target.
Bld. 508:
- Yesterday a meeting on bld. commissioning took place where the exact time schedule was discussed and the water cooling system has been finalized.
- Cooling, ventilation and electricity works will start in 2 – 3 weeks. For the ground floor this should be finished in the third week of July.
- The ground floor should be ready for moving in at the beginning of August the earliest.
Safety:
- No update on the RP courses yet.
- Users are required to follow both: the on-line RP course for the supervised area and the tailor-made RP course for ISOLDE.
- The class course should be ready for July 20, 2014.
- The memorandum on the hall division has been finally approved and it will be implemented for the ISOLDE hall as of July 1, 2014. There will be no longer access to the hall from the Saleve side. Access to the hall will be possible only with personal dosimeters from the Jura side.
- Safety course for laser users will be organized soon at CERN. It will take around 4 hours and it will be for free. 7 people are required to sign in before the course can be scheduled. Please contact Magda if you are interested.
ISOLDE general:
- Yesterday the air condition in the hall failed causing the RILIS lasers to shut down. The intervention on that is happening right now.
- Parts of trench close to the RILIS stairs, the Nicole area and the hall extension will be cleaned on Tuesday, June 17.
AOB:
- Summer student’s supervisors are asked to check with their students the PC requirements for the summer and let Magda know if they miss a PC for their student.
- The physics group meeting was followed by a student seminar of J. Hammond on optical pumping of Cu isotopes.
- Next PG meeting will take place unusually on Wednesday, June 18, at 2pm in the visitors room and it will be followed by the seminar of Dr. Achim Schwenk on “Three-nucleon forces: From neutron-rich nuclei to matter in astrophysics” https://indico.cern.ch/event/324585/.
Minutes taken by MS