PREPARATION PROCEDURE FOR LOADING FLUX QUANTUM WEIGHTS ON PICONEWTON FORCE REALIZATIION SYSTEM |
|---|
| J.-H. Choi, H. H. Choi |
- Abstract:
- We present a preparation procedure for loading flux quantum weights on piconewton force standard system, being developed at KRISS, including the micropositioning of a cantilever device with a superconducting micro-ring. To locate the device at zero-magnetic-field position inside a high-field-gradient superconducting magnet, the behaviour of the mechanical resonance frequency of the device in magnetic fields were studied in a dynamic mode and used to probe the local magnetic field value at the device position. A vertical offset of a few hundred micrometers caused a shift of ~ 0.7 Hz to the resonance frequency of 1144.4 Hz, and was nulled by either additional uniform magnetic field or a z-axis nanopositioner. Nulling was also confirmed by a non-singular temperature dependence of the resonance frequency.
- Keywords:
- micro-position, flux quantum, piconewton, force standard
- Download:
- IMEKO-WC-2012-TC3-O.pdf
- DOI:
- -
- Event details
- Event name:
- XX IMEKO World Congress
- Title:
Metrology for Green Growth
- Place:
- Busan, REPUBLIC of KOREA
- Time:
- 09 September 2012 - 12 September 2012