Journal Article

FZJ-2017-06946

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Precise measurement of magnetic field gradients from free spin precession signals of 3He and 129Xe magnetometers

Allmendinger, F. (Corresponding author) ; Blümler, P. ; Doll, M. ; Grasdijk, O. ; Heil, W. ; Jungmann, K. ; Karpuk, S. ; Krause, H.-J.FZJ* ; Offenhäusser, A.FZJ* ; Repetto, M. ; Schmidt, U. ; Sobolev, Y. ; Tullney, K. ; Willmann, L. ; Zimmer, S.

2017
Springer Berlin

This record in other databases:  

Please use a persistent id in citations: http://hdl.handle.net/2128/15737  doi:10.1140/epjd/e2017-70505-4

Abstract: 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.

---

Contributing Institute(s):

1. Bioelektronik (ICS-8)

Research Program(s):

1. 552 - Engineering Cell Function (POF3-552) (POF3-552)
2. 553 - Physical Basis of Diseases (POF3-553) (POF3-553)
3. 523 - Controlling Configuration-Based Phenomena (POF3-523) (POF3-523)

Appears in the scientific report 2017

---

Database coverage:
; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

---