Nuclear Techniques ›› 2014, Vol. 37 ›› Issue (04): 40101-040101.doi: 10.11889/j.0253-3219.2014.hjs.37.040101

• SYNCHROTRON RADIATION TECHNOLOGY AND APPLICATIONS •     Next Articles

Numerical simulation of cold conduction structure thermal performance in Hall probe cryogenic calibration system

ZHONG Yi1,2 ZHANG Wei1 ZHANG Jidong1 WANG Shuhua1 HE Yongzhou1 ZHOU Qiaogen1   

  1. 1(Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Jiading Campus, Shanghai 201800, China) 2(University of Chinese Academy of Sciences, Beijing 100049, China)
  • Received:2013-11-12 Revised:2014-03-10 Online:2014-04-10 Published:2014-04-11

Abstract:

Background: The cryogenic calibration system of Hall probe is an important tool for high precision magnetic measurement at low temperature. Purpose: In order to setup the calibration system, simulations are performed to study the temperature distribution and thermal deformation of the conduction components which have a direct impact on the Hall probe calibration. Methods: Finite element method was used to the steady thermal analysis and cold deformation analysis. Joule effect of the Hall sensor at low temperature was simulated, and temperature differences from the Joule effect were then figured out. Results: When the temperature of the secondary cold head is 4.42 K, the simulated temperature of the Hall probe is 6.75 K, and the simulation result of Hall probe axial deformation is 1.11 mm. Experimental result of the temperature of hall probe is 6.44 K. Conclusion: The simulation result is reliable and can provide the basis for Hall probe temperature correction.

Key words: Hall probe, Cryogenic calibration, Joule effect, Finite element analyses method