Research on Josephson Voltage Standard toward Ultimate AC Voltage Waveform Synthesis

约瑟夫森电压标准对交流电压波形终极合成的研究

• 批准号: 22760259
• 负责人: MARUYAMA Michitaka
• 金额: $ 2.66万
• 依托单位: National Institute of Advanced Industrial Science and Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22760259/
• 关键词: 量子デバイス; 超伝導素子; 精密計測; ジョセフソン効果; 電圧標準; 交流電圧; 電子デバイス

We have optimized an AC Programmable Josephson Voltage Standard(ACPJVS) system and developed the precise measurement method toward ideal AC voltage standard waveform synthesis. We developed the calibration system for commercial calibrators based on a synchronous sampling method and obtained the relative standard uncertainty value of 3.5 ppm at a frequency of 62.5 Hz. With considering the time-base error of the digital voltmeter used, we can expect further suppression of the uncertainty value down to about 1 ppm. As a result of the above experiments, we achieved our original goal of 1ppm at 60 Hz and also obtained prospects for improving uncertainty of the calibration at low frequencies in the conventional AC-DC transfer standard.

本文对交流可编程约瑟夫森电压标准（ACPJVS）系统进行了优化，并针对理想的交流电压标准波形合成开发了精确测量方法。开发了基于同步采样方法的商用校准器校准系统，在62.5 Hz频率下获得了3.5 ppm的相对标准不确定度值。考虑到所使用的数字电压表的时基误差，我们可以预期不确定度值将进一步抑制到约1ppm。通过上述实验，我们实现了60 Hz下1ppm的初始目标，并获得了在传统交直流传输标准下提高低频校准不确定度的前景。

项目成果

Generation of Stepwise AC Waveforms Using a NbN-Based Programmable Josephson Voltage Standard System with a 10-K Cooler

使用带有 10-K 冷却器的 NbN 可编程约瑟夫森电压标准系统生成阶梯式交流波形

• 发表时间: 2010
• 期刊: 2010 CPEM Digest
• 作者: M. Maruyama;T. Yamada;H. Sasaki;H. Yamamori;C. Urano;N. Kaneko
• 通讯作者: N. Kaneko