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MS: Fachverband Massenspektrometrie
MS 4: Ion Storage Rings
MS 4.1: Hauptvortrag
Dienstag, 18. März 2014, 14:00–14:30, DO24 1.205
The Cryogenic Storage Ring Project — •Robert von Hahn1, Klaus Blaum1, Arno Becker1, Florian Fellenberger1, Sebastian George1, Manfred Grieser1, Florian Grussie1, Philipp Herwig1, Claude Krantz1, Holger Kreckel1, Michael Lange1, Sebastian Menk1, Roland Repnow1, Kaija Spruck2, Stephen Vogel1, and Andreas Wolf1 — 1Max-Planck-Institut für Kernphysik, Heidelberg, Germany — 2Justus-Liebig-Universität, Giessen, Germany
At MPIK the electrostatic cryogenic storage ring CSR is nearing completion. At beam energies of 20 to 300 keV per charge unit and 35 m circumference the CSR will allow experiments in a cryogenic environment providing conditions of extremely low vacuum and heat radiation. By using liquid helium at 2 K for cryopumping, the projected vacuum (confirmed at a prototype) lies at 1E-13 mbar or below, ensuring long storage times for slow singly charged and highly charged ions, molecules and clusters. Moreover, phase space cooling by electrons will be implemented. The internal quantum states of molecular and cluster ions can be cooled to low temperature, yielding well defined vibrational and for smaller systems also rotational structures. In the CSR construction, the cryogenic ion beam vacuum system has been set up. Extensive tests confirming the criteria on heat flow, alignment and high-voltage stability were successfully completed on the first quadrant. In addition beam diagnostic units for electric pickup signals and spatial profiles, detectors for neutral and charged fragments, the injection beam line, and an electron cooling device are under construction.