Münster 2017 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 11: Neutrinophysik 1 (Neutrinomassen)
T 11.5: Vortrag
Montag, 27. März 2017, 17:50–18:05, VSH 17
FirstLight measurements of the KATRIN experiment — •Moritz Hackenjos — Karlsruhe Institute of Technology (KIT), Institute for Technical Physics (ITEP)
The KArlsruhe TRItium Neutrino (KATRIN) experiment aims to determine the effective mass of the electron-antineutrino with an sensitivity of 200 meV/c2 (90% C.L.) by the investigation of the endpoint energy-region of the tritium β-spectrum in a direct and model-independent way. Therefore, Molecular tritium gas will be injected continuously in the center of a Windowless Gaseous Tritium Source (WGTS). β-electrons from tritium decay are then guided via superconducting solenoids along the 70-m long experimental beamline towards two electrostatic spectrometers used for high-precision energy analysis. A segmented detector at the end of the beam line efficiently counts those electrons which overcome the retarding potential of the spectrometers.
With only 2×10−13 β-electrons found in the last 1-eV region of the tritium β-spectrum, it is of utmost importance to use most of the WGTS high luminosity. Therefore an adiabatic guidance of the β-electrons along the experimental setup without energy or statistics loss is crucial to reach the KATRIN design sensitivity.
In fall 2016 the full KATRIN beamline was run in joint operation for the first time during a FirstLight commissioning measurement campaign. This talk will focus on the overall beam line alignment of KATRIN which was studied in a series of dedicated measurements during FirstLight.