Köln 2004 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 12: Poster Session: Instrumentation and Applications
HK 12.45: Poster
Dienstag, 9. März 2004, 13:30–15:30, Foyer
Open Challenges in Electrostatic Storage Rings — •Carsten Welsch1, Joachim Ullrich1, Alwin Schempp2, Kai-Uwe Kühnel2, Christian gläßner2, and Horst Schmidt-Böcking3 — 1Max-Planck-Institut fuer Kernphysik, Heidelberg — 2Institut fuer Angewandte Physik, Frankfurt — 3Institut fuer Kernphysik, Frankfurt
In the energy region between some 10 keV and a few 100 keV, electrostatic storage rings can be used as a flexible tool in atomic and molecular physics. Due to their mass-indepence, they can store protons or singly charge biomolecules with the same energy with an identical field setup. This advantage could already be shown at existing machines in Denmark and Japan.
However, future experiments make higher demands on the beam structure and the machine itself. In-Ring collision experiments, like reaction microscopes, require extremely small pulse lengths in the order of a few nanoseconds. Due to the incoherent coupling between longitudinal and transverse phase space in the cylindrical deflectors, the beam always disperses longitudinally. Methods to counteract this behavior are analyzed at present.
In order to be able to store highly charged ions or vibrationally cool molecules in the machine, a vacuum in the order of 10(-13) mbar or less is necessary - demanding a lot of technical effort and completely different ring diagnostics.
The experiments, problems and an overview of possible solutions are presented in this contribution.