Köln 2004 – scientific programme

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HK: Physik der Hadronen und Kerne

HK 4: Instrumentation and Applications I

HK 4.3: Talk

Monday, March 8, 2004, 16:30–16:45, C

Time-of-Flight Mass Spectrometry for Ion-Catcher Facilities — •W.R. Plaß¹, S.A. Eliseev¹, T. Dickel¹, A.F. Dodonov², H. Geissel^1,3, D. Habs⁴, S. Heinz⁴, G. Münzenberg³, J. Neumayr⁴, Y.N. Novikov⁵, M. Petrick^1,3, C. Scheidenberger^1,3, P. Thirolf⁴, and Z. Wang^1,3 — ¹II. Physikalisches Institut, Justus-Liebig-Universität Gießen — ²BINEPCP, Russian Academy of Sciences, Chernogalovka, Russia — ³GSI, Darmstadt — ⁴Sektion Physik der LMU München, Garching — ⁵St. Petersburg Nuclear Physics Institute, Gatchina, Russia

A time-of-flight mass spectrometer system for identification and mass measurement of exotic nuclei at ion-catcher facilities with gas-filled stopping cells is discussed. The high resolution mass spectrometer system will be operated at the SHIPTRAP and FRS-Ion-Catcher facilities at GSI for performance characterization of the gas cells and for mass measurement of fusion-reaction products and projectile / fission fragments, respectively.

An overview of the current status of the system will be given, including results from off-line tests with different ion sources and an on-line test with primary Ar beam at the tandem accelerator in Garching, where the mass spectrometer was coupled directly to the SHIPTRAP gas cell. It will be shown that the system is now ready for direct mass measurement of exotic nuclei. Also, a novel RFQ-based system for ion transport, manipulation and distribution for use with the setup at the FRS-Ion-Catcher facility will be described.