title: An ultra-broadband low-frequency magnetic resonance system.
abstract: MR probes commonly employ resonant circuits for efficient RF transmission and low-noise reception. These circuits are narrow-band analog devices that are inflexible for broadband and multi-frequency operation at low Larmor frequencies. We have addressed this issue by developing an ultra-broadband MR probe that operates in the 0.1-3MHz frequency range without using conventional resonant circuits for either transmission or reception. This "non-resonant" approach significantly simplifies the probe circuit and allows robust operation without probe tuning while retaining efficient power transmission and low-noise reception. We also demonstrate the utility of the technique through a variety of NMR and NQR experiments in this frequency range.
authors.affiliation: Schlumberger-Doll Research, Cambridge, MA 02139, USA. Electronic address: SMandal@slb.com.
authors.forename: S
authors.initials: S
authors.lastname: Mandal
authors.affiliation: Schlumberger-Doll Research, Cambridge, MA 02139, USA. Electronic address: SUtsuzawa@slb.com.
authors.forename: S
authors.initials: S
authors.lastname: Utsuzawa
authors.affiliation: University of Waterloo, Waterloo, ON N2L 3G1, Canada. Electronic address: dcory@iqc.ca.
authors.forename: D G
authors.initials: DG
authors.lastname: Cory
authors.affiliation: Schlumberger-Doll Research, Cambridge, MA 02139, USA. Electronic address: hurlimann@slb.com.
authors.forename: M
authors.initials: M
authors.lastname: Hürlimann
authors.affiliation: Schlumberger-Doll Research, Cambridge, MA 02139, USA. Electronic address: poitzsch1@slb.com.
authors.forename: M
authors.initials: M
authors.lastname: Poitzsch
authors.affiliation: Schlumberger-Doll Research, Cambridge, MA 02139, USA. Electronic address: ysong@slb.com.
authors.forename: Y-Q
authors.initials: YQ
authors.lastname: Song
keywords: Broadband; Hardware; Low-frequency; Un-tuned