Prototype of an angular-selective photoelectron calibration source for the KATRIN experiment
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 m(v) of 0.2eV/c super(2...
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| Veröffentlicht in: | Journal of instrumentation 2011-01, Vol.6 (1), p.P01002-16 |
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| container_start_page | P01002 |
| container_title | Journal of instrumentation |
| container_volume | 6 |
| creator | Valerius, K Hein, H Baumeister, H Beck, M Bokeloh, K Bonn, J Glück, F Ortjohann, H -W Ostrick, B Zbořil, M Weinheimer, Ch |
| description | 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 m(v) of 0.2eV/c super(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. |
| doi_str_mv | 10.1088/1748-0221/6/01/P01002 |
| format | Article |
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| ispartof | Journal of instrumentation, 2011-01, Vol.6 (1), p.P01002-16 |
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| language | eng |
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| source | IOP Publishing Journals; Institute of Physics (IOP) Journals - HEAL-Link |
| subjects | Adiabatic flow Calibration Electric fields Photoelectrons Prototypes Selectivity Spectrometers Spreads |
| title | Prototype of an angular-selective photoelectron calibration source for the KATRIN experiment |
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