Details
| Original language | English |
|---|---|
| Article number | 113305 |
| Journal | Review of scientific instruments |
| Volume | 87 |
| Issue number | 11 |
| Publication status | Published - 18 Nov 2016 |
Abstract
We developed highly sensitive image-current detection systems based on superconducting toroidal coils and ultra-low noise amplifiers for non-destructive measurements of the axial frequencies (550-800 kHz) of single antiprotons stored in a cryogenic multi-Penning-trap system. The unloaded superconducting tuned circuits show quality factors of up to 500 000, which corresponds to a factor of 10 improvement compared to our previously used solenoidal designs. Connected to ultra-low noise amplifiers and the trap system, signal-to-noise-ratios of 30 dB at quality factors of >20 000 are achieved. In addition, we have developed a superconducting switch which allows continuous tuning of the detector’s quality factor and to sensitively tune the particle-detector interaction. This allowed us to improve frequency resolution at constant averaging time, which is crucial for single antiproton spin-transition spectroscopy experiments, as well as improved measurements of the proton-to-antiproton charge-to-mass ratio.
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Instrumentation
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In: Review of scientific instruments, Vol. 87, No. 11, 113305, 18.11.2016.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Highly sensitive superconducting circuits at ∼700 kHz with tunable quality factors for image-current detection of single trapped antiprotons
AU - Nagahama, H.
AU - Schneider, G.
AU - Mooser, A.
AU - Smorra, C.
AU - Sellner, S.
AU - Harrington, J.
AU - Higuchi, T.
AU - Borchert, M.
AU - Tanaka, T.
AU - Besirli, M.
AU - Blaum, K.
AU - Matsuda, Y.
AU - Ospelkaus, C.
AU - Quint, W.
AU - Walz, J.
AU - Yamazaki, Y.
AU - Ulmer, S.
N1 - Funding information: This work has been supported by the CICYT grant ESP98-1348 and the DGICYT grants PB98-1183-C03-02 and PB98-1183-C03-03, by the CIRIT grants GRQ94-8001 and PIC98.
PY - 2016/11/18
Y1 - 2016/11/18
N2 - We developed highly sensitive image-current detection systems based on superconducting toroidal coils and ultra-low noise amplifiers for non-destructive measurements of the axial frequencies (550-800 kHz) of single antiprotons stored in a cryogenic multi-Penning-trap system. The unloaded superconducting tuned circuits show quality factors of up to 500 000, which corresponds to a factor of 10 improvement compared to our previously used solenoidal designs. Connected to ultra-low noise amplifiers and the trap system, signal-to-noise-ratios of 30 dB at quality factors of >20 000 are achieved. In addition, we have developed a superconducting switch which allows continuous tuning of the detector’s quality factor and to sensitively tune the particle-detector interaction. This allowed us to improve frequency resolution at constant averaging time, which is crucial for single antiproton spin-transition spectroscopy experiments, as well as improved measurements of the proton-to-antiproton charge-to-mass ratio.
AB - We developed highly sensitive image-current detection systems based on superconducting toroidal coils and ultra-low noise amplifiers for non-destructive measurements of the axial frequencies (550-800 kHz) of single antiprotons stored in a cryogenic multi-Penning-trap system. The unloaded superconducting tuned circuits show quality factors of up to 500 000, which corresponds to a factor of 10 improvement compared to our previously used solenoidal designs. Connected to ultra-low noise amplifiers and the trap system, signal-to-noise-ratios of 30 dB at quality factors of >20 000 are achieved. In addition, we have developed a superconducting switch which allows continuous tuning of the detector’s quality factor and to sensitively tune the particle-detector interaction. This allowed us to improve frequency resolution at constant averaging time, which is crucial for single antiproton spin-transition spectroscopy experiments, as well as improved measurements of the proton-to-antiproton charge-to-mass ratio.
UR - http://www.scopus.com/inward/record.url?scp=84995957176&partnerID=8YFLogxK
U2 - 10.1063/1.4967493
DO - 10.1063/1.4967493
M3 - Article
AN - SCOPUS:84995957176
VL - 87
JO - Review of scientific instruments
JF - Review of scientific instruments
SN - 0034-6748
IS - 11
M1 - 113305
ER -