Experimental results for a 1.5 MW, 110 GHz gyrotron with an improved cavity

被引：0
|
作者：
Choi, EM [1 ]
Marchewka, C [1 ]
Sirigiri, JR [1 ]
Shapiro, MA [1 ]
Temkin, RJ [1 ]
机构：
[1] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA
来源：
IRMMW-THz2005: The Joint 30th International Conference on Infrared and Millimeter Waves and 13th International Conference on Terahertz Electronics, Vols 1 and 2 | 2005年
关键词：
D O I：
暂无
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：
Recently, a new cavity (named V-2005) has been designed and successfully tested for the 1.5 MW, 110 GHz gyrotron experiment at MIT. The novel feature of the cavity lies in its low diffractive Q factor which corresponds to reducing the Ohmic loss on the cavity wall. The design and mode competition analysis were done with the simulation code, MAGY. In short pulse experiments, we achieved 1.67 MW of output power with an efficiency of 42 % at 97 kV of beam voltage and 41 A of current. Compared to the previous cavity (named V-2003), the new cavity has a smaller output taper angle and the Ohmic loss has been reduced by 25 %. The experimental result shows an increase in efficiency (42 % vs. 37 %) in the new cavity compared to the previous one. A map of the observed modes was generated by varying the cathode and cavity magnetic fields for both cavities. Less competition from the TE19.7 mode was observed in the V-2005 cavity.
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页码：241 / 242
页数：2
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