Mainz 2012 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 18: Instrumentation
HK 18.7: Vortrag
Dienstag, 20. März 2012, 18:30–18:45, P 2
The inner electrode system of the KATRIN main spectrometer — •Michael Zacher, Björn Hillen, Hans-Werner Ortjohann, Christian Weinheimer, and Volker Hannen — Westfälische Wilhelms-Universität, Münster
The KArlsruhe TRItium Neutrino experiment aims for a measurement of the electron anti-neutrino mass with a sensitivity of 200 meV/c2 (95% C.L.). By analysing the endpoint region of the tritium β-decay, KATRIN offers a model independent way to determine m(νe) and therefore delivers an important piece in the puzzle of modern cosmology and particle physics.
With an energy resolution of Δ E<1 eV the 23 m long main spectrometer (MAC-E filter type) is one of the central parts of the experiment. For improved background reduction and the ability to shape the electric field inside the spectrometer an inner electrode system is installed with stringent requirements regarding precision, reliability and vacuum requirements. This electrode system, especially in the high-B-field regions at both spectrometer ends, has to be designed carefully to avoid particle traps which could lead to an increased background rate. The talk will give an overview about the electromagnetic design and the status of the electrode installation.
This project is supported by the BMBF contract number 05A11PM2.