Category: Physics Group Meeting Minutes

15 December 2010 Organization and administration: · All INTC documents will have to be submitted using the templates provided by the coordinator, which also include the required safety forms. For fixed installations the responsible people should prepare a safety file. Users who write proposals for that installation can easily refer to that file in their

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24 November 2010 1. Experimental and Technical news: · GPS: Recent measurements with a dense UCx(imported from Russia) indicate that there is no significant improvement of the yields compared to the typical ISOLDE UCx targets. One hypothesis is that a slower release might be a possible reason. · HRS: After a successful run on potassium

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3 November 2010 1. Technical news: GPS: · On Thursday last week high-density uranium carbide target was installed at GPS for testing the performance of that material. It is coupled to a surface (and RILIS) ionizer and a neutron converter. · On Friday followed work with stable beams extracted from that target. Over the weekend

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27 October 2010 1. Technical news: · The HRS target change has been done. · After the target change beam tuning through REX took place. Afterwards MINIBALL performed tests for the upcoming experiment on zinc. · On Thursday night last week (in between the daily setup of REX) COLLAPS took potassium beam to perform tests

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20 October 2010 1. News from the technical group: · Successful run with Be at GPS at 40 keV (both with COLLAPS and Collections at GHM). The users are very satisfied. This week, 83Rb and 119In collections are taking place. · 10000-12000 counts per proton bunch of 12Be were observed throughout the runs (with a

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6 October 2010 1. Technical and experimental news: · Last week run at GPS with a molten led target and a plasma ion source VADIS was very successful. There had been a concern about the successful operation of this target-ion-source combination, but the yields of mercury exceeded the expectations. Measurements have been performed by IS488

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29 September 2010 1. Technical and experiment news: · The GPS run with Ta W target at MINIBALL on transfer reactions on11Be was very successful. · The measurements on MINIBALL have been interrupted twice. In the first case a tube broke in the REX-linac amplifier. In the second, the proton beam had to be stopped

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22 September 2010 In the absence of YB, MK leads the meeting. 1. News from the technical group: · There was a valve stuck at the target that had to be closed manually. · Some heating issues at the target level (target and line heating dropping to 0A) were identified and are under investigation. ·

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15 September 2010 1. Technical news: · The engineers investigated the reasons for unexpected shut down of ISOLDE targets, which happened several times in the last weeks. In some cases this is related to false alarms triggering the safety interlocks, which are designed to cut the power to the targets if there is an indication

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8 September 2010 1. Experiments and technical news: HRS: · During the technical stop on Monday and Tuesday last week 224Ra was used for studies at MINIBALL. · With the protons back on Wednesday MINIBALL measured 97, 99Rb. With this all odd-mass isotopes 93, 95, 97, 99Rb from IS493 proposal have been studied successfully this

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