Optimized 1 V and 10 V Josephson series arrays
Using a modified fabrication method and a detailed design investigation we have been able to optimize the array circuits for the Josephson voltage standard and to solve the trapped flux problem. Even in very long arrays (4800 junctions in a single stripline) a yield of 1 mV per junction could be ach...
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| Veröffentlicht in: | IEEE transactions on instrumentation and measurement 1997-04, Vol.46 (2), p.229-232 |
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| container_title | IEEE transactions on instrumentation and measurement |
| container_volume | 46 |
| creator | Muller, F. Popel, R. Kohlmann, J. Niemeyer, J. Meier, W. Weimann, T. Grimm, L. Dunschede, F.-W. Gutmann, P. |
| description | Using a modified fabrication method and a detailed design investigation we have been able to optimize the array circuits for the Josephson voltage standard and to solve the trapped flux problem. Even in very long arrays (4800 junctions in a single stripline) a yield of 1 mV per junction could be achieved. The microwave power in the range from 70 GHz to 73 GHz required for stable operation of 1 V and 10 V circuits could be reduced to approximately 1 mW and 10 mW (antenna input), respectively. The best results at 10 V were obtained with circuits of 13 924 junctions arranged in 4 microwave paths connected in parallel. Excellent calibration conditions were maintained for current densities of about 10 A/cm/sup 2/ for which the ratio of operating frequency to plasma frequency is increased to six. |
| doi_str_mv | 10.1109/19.571819 |
| format | Article |
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Even in very long arrays (4800 junctions in a single stripline) a yield of 1 mV per junction could be achieved. The microwave power in the range from 70 GHz to 73 GHz required for stable operation of 1 V and 10 V circuits could be reduced to approximately 1 mW and 10 mW (antenna input), respectively. The best results at 10 V were obtained with circuits of 13 924 junctions arranged in 4 microwave paths connected in parallel. 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Even in very long arrays (4800 junctions in a single stripline) a yield of 1 mV per junction could be achieved. The microwave power in the range from 70 GHz to 73 GHz required for stable operation of 1 V and 10 V circuits could be reduced to approximately 1 mW and 10 mW (antenna input), respectively. The best results at 10 V were obtained with circuits of 13 924 junctions arranged in 4 microwave paths connected in parallel. 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Even in very long arrays (4800 junctions in a single stripline) a yield of 1 mV per junction could be achieved. The microwave power in the range from 70 GHz to 73 GHz required for stable operation of 1 V and 10 V circuits could be reduced to approximately 1 mW and 10 mW (antenna input), respectively. The best results at 10 V were obtained with circuits of 13 924 junctions arranged in 4 microwave paths connected in parallel. Excellent calibration conditions were maintained for current densities of about 10 A/cm/sup 2/ for which the ratio of operating frequency to plasma frequency is increased to six.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/19.571819</doi><tpages>4</tpages></addata></record> |
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| ispartof | IEEE transactions on instrumentation and measurement, 1997-04, Vol.46 (2), p.229-232 |
| issn | 0018-9456 1557-9662 |
| language | eng |
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| source | IEEE Electronic Library (IEL) |
| subjects | Calibration Current density Design optimization Electrical and electronic components, instruments and techniques Exact sciences and technology Fabrication Frequency Instruments, apparatus, components and techniques common to several branches of physics and astronomy Microwave antennas Microwave circuits Physics Plasma density Stripline Voltage |
| title | Optimized 1 V and 10 V Josephson series arrays |
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