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PGI-8/ICS-8 Seminar: Dr. Werner Heil (Mainz)

20.01.2014 11:00 Uhr
building 2.4w, seminar room 309b

Seminar des PGI-8 / ICS-8:

Titel: Spin-clocks: Test of fundamental symmetries in nature

Sprecher: Dr. Werner Heil (Universität Mainz)

Datum: 20. Januar 2014 Zeit: 11:00

Ort: Gebäude 2.4w, Seminarraum 309b

With the detection of the free precession of co-located 3He/129Xe nuclear spins (clock comparison), the device can be used as ultra-sensitive probe for non-magnetic spin interactions, since the magnetic dipole interaction (Zeeman-term) drops out in the weighted frequency difference.
In the talk the design and performance of a very sensitive low-field magnetometer based on the detection of free spin precession of gaseous, nuclear polarized 3He or 129Xe samples with a SQUID as magnetic flux detector is discussed. Recent results on searches for Lorentz violating signatures by monitoring the Larmor frequencies of the He/129Xe spin samples as the laboratory reference frame rotates with respect to distant stars (sidereal modulation) will be presented. Finally, a new proposal is presented to measure the electric dipole moment (EDM) of Xenon using the same technique.