A thermionic electron gun to characterize silicon drift detectors with electrons
Journal of Instrumentation(2024)
摘要
The TRISTAN detector is a new detector for electron spectroscopy at the
Karlsruhe Tritium Neutrino (KATRIN) experiment. The semiconductor detector
utilizes the silicon drift detector technology and will enable the precise
measurement of the entire tritium beta decay electron spectrum. Thus, a
significant fraction of the parameter space of potential neutrino mass
eigenstates in the keV-mass regime can be probed. We developed a custom
electron gun based on the effect of thermionic emission to characterize the
TRISTAN detector modules with mono-energetic electrons before installation into
the KATRIN beamline. The electron gun provides an electron beam with up to 25
keV kinetic energy and an electron rate in the order of 1E5 electrons per
second. This manuscript gives an overview of the design and commissioning of
the electron gun. In addition, we will shortly discuss a first measurement with
the electron gun to characterize the electron response of the TRISTAN detector.
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