Göttingen 1997 – wissenschaftliches Programm
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HK: Hadronen und Kerne
HK 9: Beschleuniger
HK 9.6: Vortrag
Montag, 24. März 1997, 16:00–16:15, HS K
Concept for a High Resolution Online Mass Separator of the Munich Fission Fragment Accelerator — •P. Thirolf1, D. Habs1, O. Kester1, D. Rudolph1, U. Schramm1, T. v.Egidy2, T. Faestermann2, G. Hinderer2, P. Kienle2, H.J. Körner2, U. Köster2, J. Ott2, and H. Backe3 — 1LMU München, D-85748 Garching — 2TU München, D-85748 Garching — 3Universität Mainz, D-55128 Mainz
For the Munich high flux reactor FRM-II a fission fragment accelerator is under design for the delivery of intense beams of mass separated very neutron rich fission fragments with energies at the Coulomb barrier. They can be used to produce very heavy neutron rich nuclei in fusion reactions. The large neutron excess will result in much longer lifetimes of the produced heavy elements compared to neutron deficient ones produced in reactions with stable nuclear beams. Thus fast α-chains can no longer be used to identify the heavy reaction products. A new separator will be used consisting of a velocity filter, an ion guide system (IGISOL) and a Penning trap. The velocity filter separates the primary beam and results in a strong background suppression. The IGISOL system improves the emittance and enriches the 1+ ions in the beam, which will then be efficiently be transferred into a Penning trap. In the Penning trap the ions are bunched, stopped and mass separated with high resolving power (R∼ 105)