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

0349726 - ÚJF 2011 RIV DE eng J - Článek v odborném periodiku
Beck, M. - Valerius, K. - Bonn, J. - Essig, K. - Gluck, F. - Ortjohann, H.W. - Ostrick, B. - Otten, E.W. - Thümmler, Th. - Zbořil, Miroslav - Weinheimer, Ch.
Effect of a sweeping conductive wire on electrons stored in a Penning-like trap between the KATRIN spectrometers.
European Physical Journal A. Roč. 44, č. 3 (2010), s. 499-511. ISSN 1434-6001. E-ISSN 1434-601X
Grant CEP: GA MŠMT LA318
Výzkumný záměr: CEZ:AV0Z10480505
Klíčová slova: cross-sections * scattering * collisions
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 2.592, rok: 2010

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-like 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.
Trvalý link: http://hdl.handle.net/11104/0189885