Upgrade of the ECE diagnostic on EAST

Zhao, Hailin; Zhou, Tianfu; Liu, Yong; Ti, Ang; Ling, Bili; Austin, M. E.; Houshmandyar, Saeid; Huang, H.; Rowan, W. L.; Hu, Liqun

doi:10.1063/1.5035452

Upgrade of the ECE diagnostic on EAST

Journal Article · Wed Aug 29 00:00:00 EDT 2018 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.5035452· OSTI ID:1609203

Zhao, Hailin ^[1]; Zhou, Tianfu ^[2]; ^[2]; ^[2]; Ling, Bili ^[2]; Austin, M. E. ^[3]; ^[3]; Huang, H. ^[3]; ^[3]; Hu, Liqun ^[2]

Chinese Academy of Sciences, Hefei (China); DOE/OSTI
Chinese Academy of Sciences, Hefei (China)
Univ. of Texas, Austin, TX (United States)

The electron cyclotron emission (ECE) diagnostic on the experimental advanced superconducting tokamak (EAST) was upgraded recently to provide electron temperature profile measurement with wider radial coverage and better precision. Here, the lower limit of the ECE detection frequency band was extended from 104 GHz to 97 GHz by adding a new 8-channel heterodyne radiometer, which ensures capability for the measurement of the second harmonic ECE with toroidal magnetic field down to 1.75 T. Also, the existing 32-channel heterodyne radiometer has been upgraded, with the frequency interval for the lower frequency range up to 120 GHz reduced from 2 GHz to 1 GHz by introducing eight channels in the intermediate frequency part. In addition, a plan is presented to incorporate tunable yttrium iron garnet filters into the existing heterodyne radiometer to obtain detailed measurements of the electron temperature gradient scale length as well as finer spatial pinpointing of magnetohydrodynamic modes. Examples from DIII-D are provided where similar ECE diagnostic allowed precise measurement of the center and width of neoclassical tearing modes.

Research Organization:: General Atomics, San Diego, CA (United States); Univ. of Texas, Austin, TX (United States)

Sponsoring Organization:: National Magnetic Confinement Fusion Science Program of China; USDOE Office of Science (SC)

Grant/Contract Number:: FC02-04ER54698; FG02-97ER54415; SC0010500

OSTI ID:: 1609203

Alternate ID(s):: OSTI ID: 1467530

Journal Information:: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 10 Vol. 89; ISSN 0034-6748

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

References (13)

An overview of the EAST project Wu, Songtao Fusion Engineering and Design, Vol. 82, Issue 5-14 https://doi.org/10.1016/j.fusengdes.2007.03.012	journal	October 2007
Overview of the electron cyclotron emission measurements on EAST Liu, Yong; Zhao, Hailin; Zhou, Tianfu Fusion Engineering and Design, Vol. 136 https://doi.org/10.1016/j.fusengdes.2017.12.032	journal	November 2018
Update on the status of the ITER ECE diagnostic design Taylor, G.; Austin, M. E.; Basile, A. EPJ Web of Conferences, Vol. 147 https://doi.org/10.1051/epjconf/201714702003	journal	January 2017
Electron cyclotron emission radiometer upgrade on the DIII-D tokamak Austin, M. E.; Lohr, J. Review of Scientific Instruments, Vol. 74, Issue 3 https://doi.org/10.1063/1.1530387	journal	March 2003
Design and characterization of a 32-channel heterodyne radiometer for electron cyclotron emission measurements on experimental advanced superconducting tokamak Han, X.; Liu, X.; Liu, Y. Review of Scientific Instruments, Vol. 85, Issue 7 https://doi.org/10.1063/1.4891040	journal	July 2014
Absolute intensity calibration of the 32-channel heterodyne radiometer on experimental advanced superconducting tokamak Liu, X.; Zhao, H. L.; Liu, Y. Review of Scientific Instruments, Vol. 85, Issue 9 https://doi.org/10.1063/1.4896047	journal	September 2014
Non-perturbative measurement of cross-field thermal diffusivity reduction at the O-point of 2/1 neoclassical tearing mode islands in the DIII-D tokamak Bardóczi, L.; Rhodes, T. L.; Carter, T. A. Physics of Plasmas, Vol. 23, Issue 5 https://doi.org/10.1063/1.4948560	journal	May 2016
Temperature gradient scale length measurement: A high accuracy application of electron cyclotron emission without calibration Houshmandyar, S.; Yang, Z. J.; Phillips, P. E. Review of Scientific Instruments, Vol. 87, Issue 11 https://doi.org/10.1063/1.4955297	journal	July 2016
Variable location channels to improve efficiency and precision for direct ∇ T _e measurements and high spatial resolution T _e -profile measurements using electron cyclotron emission Houshmandyar, S.; Austin, M. E.; Brookman, M. W. Review of Scientific Instruments, Vol. 89, Issue 10 https://doi.org/10.1063/1.5035429	journal	October 2018
Spatiotemporal changes in the pressure-driven current densities on DIII-D due to magnetic islands Petty, C. C.; Jayakumar, R. J.; Makowski, M. A. Nuclear Fusion, Vol. 52, Issue 1 https://doi.org/10.1088/0029-5515/52/1/013011	journal	December 2011
A Michelson Interferometer for Electron Cyclotron Emission Measurements on EAST Liu, Yong; Schmuck, Stefan; Zhao, Hailin Plasma Science and Technology, Vol. 18, Issue 12 https://doi.org/10.1088/1009-0630/18/12/02	journal	November 2016
The effects of relativistic broadening and frequency down-shift on electron—cyclotron emission measurements in EAST Liu, Yong; Han, Xiang; Ti, Ang Chinese Physics B, Vol. 21, Issue 4 https://doi.org/10.1088/1674-1056/21/4/045201	journal	April 2012
Measurement of the Synchrotron Radiation Spectrum from a Hot Plasma Lichtenberg, A. J.; Sesnic, S.; Trivelpiece, A. W. Physical Review Letters, Vol. 13, Issue 13 https://doi.org/10.1103/physrevlett.13.387	journal	September 1964

Cited By (1)

Characteristics of off-axis sawteeth with an internal transport barrier in EAST Xu, Ming; Zhao, H. L.; Zang, Q. Nuclear Fusion, Vol. 59, Issue 8 https://doi.org/10.1088/1741-4326/ab2686	journal	July 2019

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71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
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Upgrade of the ECE diagnostic on EAST

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