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Münster 2017 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 51: Instrumentation XII

HK 51.1: Talk

Thursday, March 30, 2017, 16:45–17:00, F 072

Set up of a Condensed Krypton Source for the KATRIN experiment — •Stephan Dyba for the KATRIN collaboration — Institut für Kernphysik, Uni Münster

With the KATRIN (KArlsruhe TRItium Neutrino) experiment the endpoint region of the tritium beta decay will be measured to determine the electron-neutrino mass with a sensitivity of 0.2 eV/c2 (90% C.L.). For the high precision which is needed to achieve the sub-eV range a MAC-E filter type spectrometer is used to analyze the electron energy by applying an electrostatic retardation potential in combination with a magnetic guiding field.

An important tool for the spatially resolved calibration of the transmission function of the KATRIN main spectrometer is the Condensed Krypton Source. This source uses a sub-monolayer 83mKr frost on a HOPG surface to generate monoenergetic conversion electrons which are guided along the magnetic field lines through the MAC-E filter onto the detector. To obtain a full coverage of all detector pixels the HOPG is moveable within the magnetic flux tube.

In this talk an overview of the system, its installation at KIT and first performance tests will be given.

This work is supported by BMBF under contract number 05A14PMA.

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