Münster 2011 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 60: Instrumentierung XI

HK 60.7: Talk

Thursday, March 24, 2011, 18:00–18:15, HS1

Status of 3He-Magnetometry — •Andreas Kraft¹, Werner Heil¹, Thorsten Lauer¹, and Yuri Sobolev^1,2 — ¹Institut für Physik, Universität Mainz, D-55099 Mainz, Germany — ²PNPI, Gatchina, Russia

For the measurement of the electric dipole moment of the free neutron it is important to know the exact magnetic field inside the EDM spectrometer. This field can be measured in-situ by monitoring the spin-precession of polarized 3He. At the institute of physics of the University of Mainz a compact polarizer unit for 3He is under construction. The 3He will be polarized, compressed and filled in two magnetometer vessels inside the EDM chamber. The talk will show the actual status of the polarizer developments in Mainz and also first results of a test setup installed at the OILL in November 2009 where the 3He spin precession was measured for first time with laser pumped cesium magnetometers from FRAP inside an EDM shield.