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MS: Massenspektrometrie
MS 5: Präzisions-MS kurzlebiger Nuklide 1
MS 5.5: Talk
Wednesday, March 15, 2006, 15:15–15:30, H1
Development of a valve at cryogenic temperatures for Penningtrap experiments — •Dennis Neidherr1, Klaus Blaum1,2, Rafael Ferrer1, Frank Herfurth2, Christine Weber1,2, and the HITRAP collaboration2 — 1Institut für Physik , Johannes Gutenberg-UniversitätMainz, 55099 Mainz, Germany — 2GSI Darmstadt, 64291 Darmstadt, Germany
The HITRAP facility will be the first setup that provides ions up to U92+ [1] at cryogenic temperatures. For this purpose the ions will be decelerated in several steps and at the end cooled down to a temperature of about 4 K in a separate Penning trap via resistive cooling. The vacuum in this cooler trap needs to be below 10−13 mbar to be able to store U92+ for at least 10 s. In order to separate the trap volume from the adjacent beam lines, valves have to be installed. Such a valve will be opened only to allow the passage of an ion bunch. Promising concepts are based on piezo driven motors or magnetically actuated ball valves [2]. These concepts and first results of prototype testing will be presented.
[1] F. Herfurth et al., AIP conference proceedings 793 (2005) 278 - 290
[2] P. Yesley, The Road to Antihydrogen, PhD thesis, Cambridge, October 2001