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- Main Technical News
- HRS: the problem with ISCOOL is still being investigated. HRS is now working only at 30-40kV, not higher.
- HRS: The repaired WATCHDOG has been tested successfully.
- HRS: Monday yield test of Be beamgave a factor 10 better production rate for 10,11Be than during the problematic 11Be run, but still a factor 100 less than latest RILIS achievements. It might be caused by the ageing of the line and target.
- HRS: There will be a target change on Friday.
- GPS: until Sunday 12Be beam was used by REX 2nd beam line and 11Be was used by GHM.
- In the GPS-10 section, the vacuum was down, probably a gauge control problem. If it happens again, the power supply will be exchanged. In the GPS-20 section, there was also a vacuum incident because a gauge went off. The gauge now in manual mode and working fine.
- YGPS.FC490 was inspected remotely: it is in an undefined position but lets the beam pass. However, the deflector for GLM cannot be used and a workaround solution had to be found. The optical inspection of the FC will happen on Aug 6, after the present GPS run.
- REX/RILIS:
- This week, 8Li beam is used by REX 2nd beam line. The influence of the WITCH magnetic field for masses lighter than 39K (in this case 8Li) was investigated on Monday.
- The lasers on Be were working fine on GPS. On HRS, sometimes after the lasers were blocked for some timethe automatic stabilization found a bad reference - the RILIS team is aware of the problem.
- For the medical collections (IS 528) the laser-to-surface ionization ratio for Dy is around 10:1, data analysis ongoing at ISOLTRAP who supported IS 528.
- RILIS is preparing for upcoming LIST (Laser ion source trap) tests in the offline lab.
- Physics and Schedule:
- The MAYA experiment (IS 520) was running until Sunday. The physics case is to study the ground state of Be-13 through the population of its isobaric analog resonance in B-13, via (Be-12,p)-reaction. The run was very smooth and they expressed their thanks to all support groups. They collected statistics for a full week and the data analysis will show if there are some good results.
- During the nights of this and next week, implantations of short-lived Tb and Nd isotopes will be performed within IS 528.They are shipped in the mornings to PSI and Tuebingen.
- The MEDICIS@CERN project isalso doing several collections that will be send to Lausanne.
- REX, 2nd beam line, is used for the Letter of Intent I 83: tilted foils and beta NMR, with 8Li-beam. The goal is to polarize the beam and detect the polarisation via beta NMR.
- It has been preliminary confirmed that ISOLDE can get protons until December 17. The 2 additional weeks are reserved only for experiments which failed earlier this year. The final confirmation is expected in September.
- The fast tape station has been disconnected from LA2 since this beam line is needed for experiments. This week the Strasbourg group is setting up a second fast tape station for their September experiment.
- Safety:
- The MAYA experiment was very satisfied with the support, now there is no more isobutene gas flow in the hall.
- The shipping and cooperation with radio protection is going very well for IS 528.
- The high activated air release from the present Ta target is still not understood. The alarm threshold has been increased a littleduring the weekend.
- AOB:
- The deadline for abstract submission for the EMIS Conference was moved to 11.8. and for the EURISOL town meeting to 10.8.
- The quality of the demineralized water in the chemical lab in the office area is bad, the ionic concentration is a factor of 300 too high. Bernard is looking into this. If you need demineralized water in the meantime, order it via CERN stores.
- Maria is asking all students to participate in the upcoming ISOLDE Physics Group Meetings - next week we start with their presentations.
- There was a presentation by Sandra Giron on “Transfer reactions for astrophysical applications”
Minutes taken by SK