Main Technical News:
- On GPS, collections were performed at GLM and GHM partly with proton sharing with the experiment on HRS. This worked well (see details below).
- On GPS, the next target was a molten-salt (NaF) target #478, which was mounted with some difficulties on Friday: the robot temporarily did not respond correctly. Because of the Ar protective atmosphere, the front-end vacuum interlocks had to be controlled manually. In the beginning, heating problems also occurred. For this target, the proton beam needs to meet special requirements concerning intensity and cycle structure.
- On Monday, it was tried to use the fast tape station for measurements, however, it was not in a ready-to-use state. It had been repaired by the Strasbourg group, but it still has to be tested by Tim.
- On HRS, COLLAPS continued running on the target UCx-W #477 with proton sharing part of the time. A proton beam of 2µA on average could be provided to ISOLDE (and 2.4uA during p-sharing), thanks to the booster.
- The HRS HV is still sparking at 40kV from time to time, which prevented the CRIS experiment from working at 50kV.
REX/RILIS:
- The x-ray background from LINAC at MINIBALL was measured, the MCP test has been performed. There will be stable beam available for the tilted-foils β-NMR experiment. At the 2nd beam line, the scattering chamber has been aligned.
- RILIS and ISOLTRAP are developing a LabView-based automated measurement loop for scanning HF-structure in broad-band mode (for now).
Other Information from Technical Meeting:
- There is a new team for alignment measurements. In the case, that you need their service, please contact Magda well in advance to arrange everything.
Physics/Schedule:
- SSP physics went reasonably well for IS 432, 437, 450, 487, 497 and 501. Samples were collected for Br-80, Kr-77, Se-75, As-73, As-71, Ge-69, Co-57 (Co-56), and Cu-61. It was the first successful online use of the diffusion chamber.
- On HRS, COLLAPS measured K-51 within IS484. The yield was a factor of 4 higher compared to last year, so proton sharing did not hamper the experiment. K-52 was attempted.
- Within IS 509 with the salt target on GPS, led by our target group, one looks at neutrino emitters like Ne-18 for beta beams.
- The CRIS experiment will continue on HRS on Friday within IS 471 looking for neutron-deficient Fr isotopes.
- On GPS, IS 537 for Hf isomers will take over on Monday.
Safety:
- The official document confirming the shortening of the cooling time of actinide targets from 3 to 2 days has been finalised.
- Please remember not to block the access to the ISOLDE hall, fire fighters should always be able to enter with their vehicles. Concerning parking, you can look for a spot in front of or on the Jura side of bldg. 275.
- This month is Bike-to-Work month. ISOLDE has four teams registered.
- CRIS has received a check list for an electrical inspection. ISOLTRAP apparently has enough prior inspections, so that Olivier Tisson (the electrical safety officer in charge) will compile one new document.
AOB:
- A noise signal of 100kHz can be detected across the hall. If you have brought in (or turned on) some equipment recently that could produce this noise, please contact Magda. Currently, this signal is disturbing the CRIS experiment.
- Two summer students from Saudi-Arabia will arrive next week. They will sit in Mats’ office and will be supervised by Thomas and Karl.
Presentation:
-The meeting was follow by a seminar by A. Maulik on “Characterization of solid state nuclear track detectors to search for heavy ions and strangelets in cosmic rays”.
-Next week, there will be a seminar by Makito Oi on “Study of nuclear excited states through quantised angular momentum”, which will take place on Friday at 11am. The abstract can be found at http://indico.cern.ch/conferenceDisplay.py?confId=195696 .
Minutes taken by SK