تقرير
Highly-sensitive superconducting circuits at ~700 kHz with tunable quality factors for image-current detection of single trapped antiprotons
| العنوان: | Highly-sensitive superconducting circuits at ~700 kHz with tunable quality factors for image-current detection of single trapped antiprotons |
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| المؤلفون: | Nagahama, H., Schneider, G., Mooser, A., Smorra, C., Sellner, S., Harrington, J., Higuchi, T., Borchert, M., Tanaka, T., Besirli, M., Blaum, K., Matsuda, Y., Ospelkaus, C., Quint, W., Walz, J., Yamazaki, Y., Ulmer, S. |
| سنة النشر: | 2016 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Instrumentation and Detectors |
| الوصف: | 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$\sim$800$\,$kHz) of single antiprotons stored in a cryogenic multi-Penning-trap system. The unloaded superconducting tuned circuits show quality factors of up to 500$\,$000, which corresponds to a factor of 10 improvement compared to our previously used solenoidal designs. Connected to ultra-low noise amplifiers and the trap system, signal-to-noise-ratios of 30$\,$dB at quality factors of > 20$\,$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. Comment: 87 (2016) 113305 |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1063/1.4967493 |
| URL الوصول: | http://arxiv.org/abs/1612.08481 |
| رقم الأكسشن: | edsarx.1612.08481 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1063/1.4967493 |
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