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We describe the design and construction of a single-coil, two-channel probe for the detection of low-field magnetic resonance using dynamic nuclear polarization (DNP). The high-frequency channel of the probe, which is used to saturate the electron spins, is tuned to the electron Larmor frequency, 75 MHz at 2.7 mT, and matched to 50 Ω. Low-field, 1H nuclear magnetic resonance (NMR) is detected through the second, low-frequency channel at frequencies ≪1 MHz. The performance of the probe was tested by measuring the DNP of protons in a manganese (II) chloride solution at 2.7 mT. At the proton NMR frequency of 120 kHz, the signal amplitude was enhanced over the value without DNP by a factor of about 200. © 1997 American Institute of Physics.
Published in:
Review of Scientific Instruments
(Volume:68
,
Issue:
3
)
Date of Publication: Mar 1997
- Page(s):
- 1527 - 1531
- ISSN :
- 0034-6748
- Digital Object Identifier :
- 10.1063/1.1147641
- Product Type:
- Journals & Magazines
- Date of Current Version :
- 18 June 2009
- Issue Date :
- Mar 1997
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