TY  - JOUR
AU  - Allmendinger, Fabian
AU  - Blümler, Peter
AU  - Doll, Michael
AU  - Grasdijk, Olivier
AU  - Heil, Werner
AU  - Jungmann, Klaus
AU  - Karpuk, Sergej
AU  - Krause, Hans-Joachim
AU  - Offenhäusser, Andreas
AU  - Repetto, Maricel
AU  - Schmidt, Ulrich
AU  - Sobolev, Yuri
AU  - Tullney, Kathlynne
AU  - Willmann, Lorenz
AU  - Zimmer, Stefan
TI  - Precise measurement of magnetic field gradients from free spin precession signals of 3He and 129Xe magnetometers
JO  - The European physical journal / D
VL  - 71
IS  - 4
SN  - 1434-6079
CY  - Berlin
PB  - Springer
M1  - FZJ-2017-06946
SP  - 98
PY  - 2017
AB  - We report on precise measurements of magnetic field gradients extracted from transverse relaxation rates of precessing spin samples. The experimental approach is based on the free precession of gaseous, nuclear spin polarized 3He and 129Xe atoms in a spherical cell inside a magnetic guiding field of about 400 nT using LTC SQUIDs as low-noise magnetic flux detectors. The transverse relaxation rates of both spin species are simultaneously monitored as magnetic field gradients are varied. For transverse relaxation times reaching 100 h, the residual longitudinal field gradient across the spin sample could be deduced to be |∇Bz| = (5.6 ± 0.2) pT/cm. The method takes advantage of the high signal-to-noise ratio with which the decaying spin precession signal can be monitored that finally leads to the exceptional accuracy to determine magnetic field gradients at the sub pT/cm scale.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000403484500003
DO  - DOI:10.1140/epjd/e2017-70505-4
UR  - https://juser.fz-juelich.de/record/838304
ER  -