Design and characterization of a 32-channel heterodyne radiometer for electron cyclotron emission measurements on experimental advanced superconducting tokamak

X Han; X Liu; Y Liu; C W Domier; N C Luhmann Jr; E Z Li; L Q Hu; X Gao

doi:10.1063/1.4891040

Design and characterization of a 32-channel heterodyne radiometer for electron cyclotron emission measurements on experimental advanced superconducting tokamak

Rev Sci Instrum. 2014 Jul;85(7):073506. doi: 10.1063/1.4891040.

Authors

X Han¹, X Liu¹, Y Liu¹, C W Domier², N C Luhmann Jr², E Z Li¹, L Q Hu¹, X Gao¹

Affiliations

¹ Institution of Plasma Physics, Chinese Academy of Sciences, P. O. Box 1126, Hefei, Anhui 230031, People's Republic of China.
² Department of Electrical and Computer Engineering, University of California, Davis, California 95616, USA.

PMID: 25085139
DOI: 10.1063/1.4891040

Abstract

A 32-channel heterodyne radiometer has been developed for the measurement of electron cyclotron emission (ECE) on the experimental advanced superconducting tokamak (EAST). This system collects X-mode ECE radiation spanning a frequency range of 104-168 GHz, where the frequency coverage corresponds to a full radial coverage for the case with a toroidal magnetic field of 2.3 T. The frequency range is equally spaced every 2 GHz from 105.1 to 167.1 GHz with an RF bandwidth of ~500 MHz and the video bandwidth can be switched among 50, 100, 200, and 400 kHz. Design objectives and characterization of the system are presented in this paper. Preliminary results for plasma operation are also presented.