Speaker
Dr
Yury Sobolev
(Institut fuer Physik, Johannes-Gutenberg Universitaet, Mainz)
Description
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 used to search for short-range spin-dependent interactions. The magnetic field dependence ( Zeeman-term) can be eliminated using co-located 3He/129Xe spin samples and measuring the weighted difference of their respective spin precession frequencies, i.e. Df= f_He – γHe / γXe f_Xe . Thus, one gets sensitive to purely non-magnetic interactions. We looked for a change in Df when heavy masses positioned close to the cylindrical sample cell were moved away during the measurement cycle. A sensitivity of ~5 nHz was obtained within 20 hours. Resulting limitations on spin-dependent short-range interactions will be discussed.
Primary author
Dr
Yury Sobolev
(Institut fuer Physik, Johannes-Gutenberg Universitaet, Mainz)
Co-authors
Allard Schnabel
(Physikalisch-Technische Bundesanstalt, 10587 Berlin)
Claudia Gemmel
(Institut für Physik, 5099 Mainz)
Frank Seifert
(Physikalisch-Technische Bundesanstalt, 10587 Berlin)
Kathlynne Thullney
(Institut für Physik, 5099 Mainz)
Kay Lenz
(Institut für Physik, 5099 Mainz)
Lutz Trahms
(Physikalisch-Technische Bundesanstalt, 10587 Berlin)
Martin Burghoff
(Physikalisch-Technische Bundesanstalt, 10587 Berlin)
Silvia Knappe-Grüneberg
(Physikalisch-Technische Bundesanstalt, 10587 Berlin)
Ulrich Schmidt
(Physikalisch-Technische Institut, 69115 Heidelberg)
Prof.
Werner Heil
(Institut für Physik, 5099 Mainz)
Wolfgang Kilian
(Physikalisch-Technische Bundesanstalt, 10587 Berlin)
Wolfgang Müller
(Physikalisch-Technische Bundesanstalt, 10587 Berlin)
