First results for positron accumulation at the Giessen linac

Dedicated to Prof. Dr. Dr. E.h.W. Hanle on the occasion of the 20th anniversary of installing the Giessen linac.
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Abstract

At the Giessen 65 MeV linac a source for low energy positrons (energy between 100 eV and 1 keV/100 keV) TEPOS [1,2] is installed. The corresponding pulsed beam (pulse lengths 6 ns to 2 μs; repetition rate 600 Hz) is guided in a magnetic transporting system to the experimental hall. There, at present, a special additional beam transporting vacuum tube (3 m long), with a surrounding large solenoid, is provided. The storing up (accumulating) facility is described and first results are given.

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