Abstract
A dc superconducting quantum interference device is used as a tuned radio frequency amplifier at liquid helium temperatures to detect pulsed nuclear quadrupole resonance at ∼30 MHz. At a bath temperature of 4.2 K, a total system noise temperature of 6±1 K has been achieved, with a quality factor Q of 2500. A novel Q spoiler, consisting of a series array of Josephson tunnel junctions, reduces the ring-down time of the tuned circuit after each pulse. The minimum number of Bohr magnetons observable from a free precession signal after a single pulse is ∼2×1016 in a bandwidth of 10 kHz.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 637-639 |
| Number of pages | 3 |
| Journal | Applied Physics Letters |
| Volume | 47 |
| Issue number | 6 |
| DOIs | |
| State | Published - 1985 |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
Cite this
Nuclear quadrupole resonance detected at 30 MHz with a dc superconducting quantum interference device. / Hilbert, Claude; Clarke, John; Sleator, Tycho; Hahn, Erwin L.
In: Applied Physics Letters, Vol. 47, No. 6, 1985, p. 637-639.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Nuclear quadrupole resonance detected at 30 MHz with a dc superconducting quantum interference device
AU - Hilbert, Claude
AU - Clarke, John
AU - Sleator, Tycho
AU - Hahn, Erwin L.
PY - 1985
Y1 - 1985
N2 - A dc superconducting quantum interference device is used as a tuned radio frequency amplifier at liquid helium temperatures to detect pulsed nuclear quadrupole resonance at ∼30 MHz. At a bath temperature of 4.2 K, a total system noise temperature of 6±1 K has been achieved, with a quality factor Q of 2500. A novel Q spoiler, consisting of a series array of Josephson tunnel junctions, reduces the ring-down time of the tuned circuit after each pulse. The minimum number of Bohr magnetons observable from a free precession signal after a single pulse is ∼2×1016 in a bandwidth of 10 kHz.
AB - A dc superconducting quantum interference device is used as a tuned radio frequency amplifier at liquid helium temperatures to detect pulsed nuclear quadrupole resonance at ∼30 MHz. At a bath temperature of 4.2 K, a total system noise temperature of 6±1 K has been achieved, with a quality factor Q of 2500. A novel Q spoiler, consisting of a series array of Josephson tunnel junctions, reduces the ring-down time of the tuned circuit after each pulse. The minimum number of Bohr magnetons observable from a free precession signal after a single pulse is ∼2×1016 in a bandwidth of 10 kHz.
UR - http://www.scopus.com/inward/record.url?scp=36549094850&partnerID=8YFLogxK
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U2 - 10.1063/1.96042
DO - 10.1063/1.96042
M3 - Article
VL - 47
SP - 637
EP - 639
JO - Applied Physics Letters
JF - Applied Physics Letters
SN - 0003-6951
IS - 6
ER -