Effect of a sweeping conductive wire on electrons stored in the Penning trap between the KATRIN spectrometers

Details Effect of a sweeping conductive wire on electrons stored in the Penning trap between the KATRIN spectrometers Effect of a sweeping conductive wire on electrons stored in the Penning trap between the KATRIN spectrometers

2009-09-18

arxiv.org/abs/0909.3337v2

Eur.Phys.J.A44:499-511,2010

Physics

Instrumentation and Detectors

Final version published in EPJ A, 14 pages, 19 figures (21 files)

Scientific paper

10.1140/epja/i2010-10959-1

The KATRIN experiment is going to search for the mass of the electron antineutrino down to 0.2 eV/c^2. In order to reach this sensitivity the background rate has to be understood and minimised to 0.01 counts per second. One of the background sources is the unavoidable Penning trap for electrons due to the combination of the electric and magnetic fields between the pre- and the main spectrometer at KATRIN. In this article we will show that by sweeping a conducting wire periodically through such a particle trap stored particles can be removed, an ongoing discharge in the trap can be stopped, and the count rate measured with a detector looking at the trap is reduced.

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