DEVELOPMENT OF 180-GHZ HETERODYNE RADIOMETER FOR ELECTRON-CYCLOTRON EMISSION MEASUREMENTS IN JT-60U

被引：26

作者：

ISEI, N

SATO, M

ISHIDA, S

UCHINO, K

NAGASHIMA, A

MATOBA, T

OYEVAAR, T

机构：

[1] Japan Atomic Energy Research Institute, Naka Fusion Research Establishment, Naka-gun, Ibaraki-ken 311-01, Naka-machi

来源：

REVIEW OF SCIENTIFIC INSTRUMENTS | 1995年 / 66卷 / 01期

关键词：

D O I：

10.1063/1.1146364

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A 12-channel heterodyne radiometer system has been developed to obtain electron temperature with high time and spatial resolution from the electron cyclotron emission (ECE) in JT-60U. Resolutions of a single-sideband-type receiver are (1) Δt∼1 μs and (2) Δf=0.5 GHz. The second harmonic extraordinary mode of ECE is utilized for this system and the frequency band is 176-188 GHz. The noise level of the system is determined by unavoidable photon fluctuations, and the signal-to-noise ratio was measured to be about 50 with a video bandwidth of 100 kHz for a signal temperature above ∼200 eV. Details of the design, the obtained performance, and typical measurements are described. © 1995 American Institute of Physics.

引用

页码：413 / 415

页数：3

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