Second Harmonic 527 GHz Gyrotron for DNP-NMR

被引：1
|
作者：
Jawla, Sudheer [1 ]
Mastovsky, Ivan [1 ]
Shapiro, Michael A. [1 ]
Temkin, Richard J. [1 ]
机构：
[1] MIT, Plasma Sci & Fus Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA
来源：
2019 INTERNATIONAL VACUUM ELECTRONICS CONFERENCE (IVEC) | 2019年
关键词：
microwaves; Gyrotron; electron beam; Gaussian bean; NMR; Corrugated waveguide;
D O I：
10.1109/ivec.2019.8744878
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：
We have built a frequency tunable 527 GHz gyrotron for an 800 MHz DNP-NMR spectrometer. The gyrotron is designed at the second harmonic (omega=2 omega(c)) of the electron cyclotron frequency. It produces similar to 10 W continuous microwave power at 527.12 GHz frequency using a diode type electron gun (V similar to 16.5 kV, I-b similar to 110 mA). The gyrotron is tunable within similar to 0.5 GHz by combining voltage and magnetic field tuning. The gyrotron comprises an internal periscope assembly to internally convert a Gaussian beam to an HE11 mode in a 12 mm i.d. corrugated waveguide. The corrugated waveguide transmission line system is built including 3 m long 16 mm i.d. waveguide and a corrugated taper from 12 mm to 16 mm i.d. waveguide.
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页数：2
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