Title :
Measuring Planck´s constant and monitoring the kilogram at NPL
Author :
Robinson, I.A. ; Kibble, B.P.
Author_Institution :
Nat. Phys. Lab., Teddington, UK
Abstract :
Summary form only given, as follows.We are commencing measurements aimed at a definitive value for h with an uncertainty of about 1 in 10/sup 8/ and a target completion time of June, 1996. Many incremental improvements to the apparatus have enabled us to obtain a resolution of 1 in 10/sup 8/ (including the measurement of gravitational acceleration). Investigation of systematic errors is beginning.
Keywords :
Josephson effect; constants; mass measurement; measurement errors; superconducting junction devices; Josephson junction array; June 1996; NPL; Planck´s constant; hysteresis; kilogram; measurement of gravitational acceleration; systematic errors; Acceleration; Automatic control; Coils; Electrical resistance measurement; Gain measurement; Josephson junctions; Magnetic flux; Microwave devices; Monitoring; Voltage;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 1996 Conference on
Conference_Location :
Braunschweig, Germany
Print_ISBN :
0-7803-3376-4
DOI :
10.1109/CPEM.1996.546528
