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27 April 2024 |
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Prototype of an angular-selective photoelectron calibration source for the KATRIN experiment | | K. Valerius
; H. Hein
; H. Baumeister
; M. Beck
; K. Bokeloh
; J. Bonn
; F. Glück
; H.-W. Ortjohann
; B. Ostrick
; M. Zbořil
; Ch. Weinheimer
; | | Date: |
29 Nov 2010 | | Abstract: | The method of direct neutrino mass determination based on the kinematics of
tritium beta decay, which is adopted by the KATRIN experiment, makes use of a
large, high-resolution electrostatic spectrometer with magnetic adiabatic
collimation. In order to target a sensitivity on the neutrino mass of 0.2
eV/c^2, a detailed understanding of the electromagnetic properties of the
electron spectrometer is essential, requiring comprehensive calibration
measurements with dedicated electron sources. In this paper we report on a
prototype of a photoelectron source providing a narrow energy spread and
angular selectivity. Both are key properties for the characterisation of the
spectrometer. The angular selectivity is achieved by applying non-parallel
strong electric and magnetic fields: Directly after being created,
photoelectrons are accelerated rapidly and non-adiabatically by a strong
electric field before adiabatic magnetic guiding takes over. | | Source: | arXiv, 1011.6365 | | Services: | Forum | Review | PDF | Favorites | |
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