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The KATRIN pre-spectrometer at reduced filter energy

Prall, M ; Renschler, P ; Glück, F ; Beglarian, A ; Bichsel, H ; Bornschein, L ; Chaoui, Z ; Drexlin, G ; Fränkle, F ; Görhardt, S ; Mertens, S ; Steidl, M ; Thümmler, Th ; Wüstling, S ; Weinheimer, C ; Zadorozhny, S

New journal of physics, 2012-07, Vol.14 (7), p.73054 [Periódico revisado por pares]

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Título:
The KATRIN pre-spectrometer at reduced filter energy
Autor: Prall, M ; Renschler, P ; Glück, F ; Beglarian, A ; Bichsel, H ; Bornschein, L ; Chaoui, Z ; Drexlin, G ; Fränkle, F ; Görhardt, S ; Mertens, S ; Steidl, M ; Thümmler, Th ; Wüstling, S ; Weinheimer, C ; Zadorozhny, S
É parte de: New journal of physics, 2012-07, Vol.14 (7), p.73054
Descrição: The Karlsruhe Tritium Neutrino (KATRIN) experiment will determine the mass of the electron neutrino with a sensitivity of 0.2 eV (90% CL) via a measurement of the β-spectrum of gaseous tritium near its endpoint of E0 = 18.57 keV. An ultra-low background of about b = 10 mHz is among the requirements on reaching this sensitivity. In the KATRIN main beam line, two spectrometers of MAC-E filter type are used in tandem configuration. This setup, however, produces a Penning trap, which could lead to increased background. We have performed test measurements showing that the filter energy of the pre-spectrometer can be reduced by several keV in order to diminish this trap. These measurements were analyzed with the help of a complex computer simulation, modeling multiple electron reflections from both the detector and the photoelectric electron source used in our test setup.
Editor: IOP Publishing
Idioma: Inglês

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