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Aachen 2019 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 68: Detektorsysteme IV

T 68.3: Vortrag

Mittwoch, 27. März 2019, 16:30–16:45, H08

Characterization of the KATRIN detector wafers with the Iron Bird test setup — •Sebastian Schmid for the KATRIN collaboration — Institute of Experimental Particle Physics, Karlsruhe Institute of Technology (KIT)

The KArlsruhe TRItium Neutrino experiment (KATRIN) aims to determine the effective mass of the electron anti-neutrino by measuring the β-spectrum of molecular tritium. To reach the intended sensitivity of 0.2 eV/c2 the energy spectrum close to the kinematic endpoint is determined precisely. To do so the experiment combines a high-luminosity windowless gaseous tritium source followed by a differential and cryogenic pump section for reduction of the tritium flow with a high resolution MAC-E filter spectrometer system. At the downstream end of the setup the transmitted electrons are detected by a focal plane detector system containing a 148-pixel silicon p-i-n-diode wafer.

A test stand, called Iron Bird, was established in order to examine the characteristics of the KATRIN wafers. Of particular importance is to determine the energy resolution of individual pixels with a 241Am source and to check for electrical shorts between pixels. The Iron Bird utilizes readout electronics and data acquisition system equivalent to the KATRIN main detector. This talk will cover the hardware setup, commissioning and the characterization of the wafers using the Iron Bird.

This work was supported by the U.S. Department of Energy under award numbers DE-FG02-97ER41020, DE-FG02-97ER41041, DE- FG02-97ER41033, BMBF (05A17VK2), and the HGF.

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