Analysis of the output mode from 60 GHz, 200 kW pulsed and CW gyrotrons

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Description

A Varian 60 GHz, CW gyrotron has recently been operated at power levels up to 200 kW CW. The tube employs a TE/sub 011//TE/sub 021/ complex interaction cavity which inhibits mode competition by the TE/sub 221/ mode with the desired TE/sub 021/ mode. The output mode of the cavity is nominally in the TE/sub 02/ circular waveguide mode in overmoded waveguide. Since the output waveguide also serves as the gyrotron collector, mode conversion occurs in the taper sections and gaps incorporated into the collector. Measurements of the mode conversion on a 60 GHz, 200 kw, 100 ms pulse tube, have ... continued below

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Pages: 6

Creation Information

Felch, K.; Bier, R.; Fox, L.; Huey, H.; Jory, H.; Manca, J. et al. January 1, 1983.

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Description

A Varian 60 GHz, CW gyrotron has recently been operated at power levels up to 200 kW CW. The tube employs a TE/sub 011//TE/sub 021/ complex interaction cavity which inhibits mode competition by the TE/sub 221/ mode with the desired TE/sub 021/ mode. The output mode of the cavity is nominally in the TE/sub 02/ circular waveguide mode in overmoded waveguide. Since the output waveguide also serves as the gyrotron collector, mode conversion occurs in the taper sections and gaps incorporated into the collector. Measurements of the mode conversion on a 60 GHz, 200 kw, 100 ms pulse tube, have been made and compared with similar measurements on the 60 GHz. 200 kW, CW gyrotron. These measurements indicated that the CW tube had significantly more conversion of the TE/sub 02/ mode into other TE/sub on/ modes than did the pulse tube. Current design work is aimed at reducing the mode conversion of the CW design to the same levels as the pulse design (less than or equal to 10% mode converison).

Physical Description

Pages: 6

Notes

NTIS, PC A02/MF A01; 1.

Source

  • 8. international conference on infrared and millimeter waves, Miami Beach, FL, USA, 12 Dec 1983

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  • Other: DE84004586
  • Report No.: CONF-831245-2
  • Grant Number: W-7405-ENG-26
  • Office of Scientific & Technical Information Report Number: 5470788
  • Archival Resource Key: ark:/67531/metadc1093846

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 1983

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  • Feb. 10, 2018, 10:06 p.m.

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  • Feb. 20, 2018, 7:37 p.m.

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Felch, K.; Bier, R.; Fox, L.; Huey, H.; Jory, H.; Manca, J. et al. Analysis of the output mode from 60 GHz, 200 kW pulsed and CW gyrotrons, article, January 1, 1983; United States. (digital.library.unt.edu/ark:/67531/metadc1093846/: accessed September 19, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.