München 2004 – wissenschaftliches Programm
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MS: Massenspektrometrie
MS 7: Poster
MS 7.8: Poster
Donnerstag, 25. März 2004, 14:00–16:00, Schellingstr. 3
Development of a new 60 kV high-voltage switch for the ISOLTRAP experiment at ISOLDE/CERN — •S. George1, K. Blaum2, P. Delahaye2, F. Herfurth2, H.-J. Kluge3, S. Stahl4, and C. Yazidjian3 — 1Fakultät für Physik, Westfälische Wilhelms-Universität, 48149 Münster, Germany — 2CERN, Division EP, 1211 Geneva 23, Switzerland — 3GSI, Planckstraße 1, 64291 Darmstadt, Germany — 4Institut für Physik, Johannes Gutenberg-Universität, 55099 Mainz, Germany
ISOLTRAP is a Penning trap mass spectrometer dedicated to the high-precision measurement of the masses of exotic nuclides [1]. It is supplied with radioactive ions at 60 keV energy from the ISOLDE facility. The beam conditioning stage of ISOLTRAP is situated on a high-voltage platform. To adapt the ion cloud’s potential energy for transport to the Penning trap setup a drifttube is switched rapidly from about 60 keV to ground potential while the ion cloud resides in it [2]. To reduce a fluctuation in secondary-beam energy brought about by a leakage current in the present switch setup we designed and built a new fast high-voltage switch to replace the used asymmetric switch. The setup as well as first results will be presented.
[1] F. Herfurth et al., J. Phys. B 36 (2003) 931.
[2] F. Herfurth et al., Nucl. Instrum. Methods A 469 (2001) 254.