Plasma scattering measurement by using a submillimeter wave gyrotron as a radiation source

被引：0
|
作者：
Ogawa, I [1 ]
Idehara, T [1 ]
Itakura, Y [1 ]
Hori, T [1 ]
Wagner, D [1 ]
Thumm, M [1 ]
机构：
[1] Univ Fukui, Res Ctr Dev Far Infrared Reg, Fukui 9108507, Japan
来源：
MSMW'04: FIFTH INTERNATIONAL KHARKOV SYMPOSIUM ON PHYSICS AND ENGINEERING OF MICROWAVES, MILLIMETER, AND SUBMILLIMETER WAVES, SYMPOSIUM PROCEEDINGS, VOLS 1 AND 2 | 2004年
关键词：
D O I：
10.1109/MSMW.2004.1345978
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Gyrotron FU II is applied as a submillimeter wave radiation source to plasma scattering measurement for the Compact Helical System (CHS) in National Institute for Fusion Science (NIFS) in Japan. The stabilization of gyrotron output and high quality probe beam are required to improve the performance of the measurement. The outputs (cw operation, f=301GHz, Psimilar to20W) of the Gyrotron FU IV are stabilized (DeltaP/Psimilar to1%, Deltafsimilar to10kHz) by decreasing the fluctuations of the potentials (DeltaV(k)similar to0.6V, DeltaV(a)similar to0.2V), via introducing smoothing circuits consisting of a resistor, an induction coil and a capacitor. Further stabilization of output frequency (Deltaf<1kHz) is attained by applying phase lock loop. A high purity mode operation is a prerequisite for effective conversion of the output radiation into the probe beam of scattering measurement. We have constructed a new gyrotron, namely, Gyrotron FU VA, which has a carefully designed resonant cavity. The measurements of the radiation patterns have confirmed high-purity mode operations.
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收藏
页码：501 / 503
页数：3
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