Bochum 1998 – scientific programme
Parts | Days | Selection | Search | Downloads | Help
HK: Hadronen und Kerne
HK 56: Postersitzung
HK 56.39: Poster
Wednesday, March 18, 1998, 17:00–19:00, Foyer
A prototype set-up for stopping and extraction of SHIP separated heavy ions using a buffer gas cell and a radio frequency quadrupole ion guide — •J. Ott1, D. Habs1, A. Kolbe1, U. Schramm1, P.G. Thirolf1, H. Backe2, W. Lauth2, M. Sewtz2, and R.B. Moore3 — 1LMU München, Am Coulombwall 1, D-85748 Garching — 2Universität Mainz, Institut für Kernphysik, Becherweg 45, D-55099 Mainz — 3McGill University, Montreal, H3A 2B1, Canada
It is planned to built a double Penning trap mass spectrometer (SHIP-TRAP) behind the velocity filter SHIP at GSI. The reaction products passing SHIP must be stopped and cooled before they can be injected into the first trap of the spectrometer. The stopping will be done in a buffer gas cell [1] operated with He at some 100 mbar pressure. Because the Penning traps must be operated under high vacuum the ions have to be transported along differential pumping stages of about 1 m length. This can be done with high efficiency and a small emittance of the resulting beam using radio frequency sextupole (SPIG) [2] or quadrupole (QPIG) ion guides [3]. At the Munich Tandem accelerator facility a prototype system of the buffer gas cell and the rf QPIG are built. The results of calculations for this design and the experimental status will be presented.
[1] H. Backe et al., Nucl. Instr. Meth. B 126 (1997) 406.
[2] P. Van den Bergh et al., Nucl. Instr. Meth. B 126 (1997) 194.
[3] M.D. Lunney et al., CSNSM 97-02, Orsay 1997.