Current Status of Josephson Arbitrary Waveform Synthesis at NMIJ/AIST

The current status of Acoustics, Ultrasound and Vibration measurement standards at NMIJ/ AIST

Development of Josephson junction series arrays for synthesis of AC voltages and arbitrary waveforms

Josephson junctions operated by short pulses make the synthesis of AC and arbitrary waveforms possible. Series arrays of intrinsically shunted SINIS and SNS Josephson junctions were developed and characterized for applications in this Josephson arbitrary waveform synthesizer (S: Superconductor, I: Insulator, N: Normal conductor). First measurements under pulse irradiation are presented.

1 Laboratory Report of National Metrology Institute of Japan ( NMIJ / AIST ) and Japan Electric Meters Inspection Corporation ( JEMIC ) 2013 - 2015

At NMIJ/AIST, there are two divisions in the electrical standards area. One is the Electricity and Magnetism (EM) Division and the other is the Electromagnetic Waves Division. The former covers low frequency electrical standards and the latter high frequency and electromagnetic field standards. The EM division has two sections, the Applied Electrical Standards Section and the Quantum Electrical...

Recent activities in neutron standardization at NMIJ/AIST

This report described recent activities on neutron standardization at the National Metrology Institute of Japan (NMIJ) in the National Institute of Advanced Industrial Science and Technology (AIST). The present status of our accelerator-based neutron field is described mainly on the development of monoenergetic neutron fluence standards [1-3]. Collaboration is in progress with the Japan Atomic ...

Josephson Arbitrary Waveform Synthesizer:electronics for a Quantum Standard for Ac Voltage

A new primary standard for AC voltage based on pulse driven Josephson junction arrays is under development. In this paper, preliminary spectral measurements and simulations are presented on a fast switching multiplexer unit built for the high precision synthesis of arbitrary waves. First order delta-sigma modulation is used to represent the wave to be synthesized. The first results are promisin...