Multichannel millimeter wave interferometer for W7-AS

被引：17
|
作者：
Geist, T
Wursching, E
Hartfuss, HJ
机构：
[1] Max-Planck-Inst. fur Plasmaphysik, EURATOM Association, 85748 Garching
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 1997年 / 68卷 / 02期
关键词：
D O I：
10.1063/1.1147878
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
A newly designed ten channel microwave interferometer for Line integrated electron density measurements at the experiment W7-AS stellarator is described. The probing signals in the frequency range of 160-162 GHz are generated by Gunn oscillators with subsequent frequency doublers. Double conversion heterodyne receivers with 2 MHz bandwidth are used for detection. All oscillators involved are phase locked. Use of each Gunn oscillator is twofold: as a source for the probing signal and as a local oscillator for heterodyne detection. The dynamic range of the millimeter wave part is about 70 dB. The instrument operates up to a peak density of 7 x 10(19) m(-3) with a temporal resolution of 5 mu s. This article gives a detailed technical description of the system and demonstrates its usefulness by means of an experimental example. (C) 1997 American Institute of Physics.
引用
收藏
页码：1162 / 1167
页数：6
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