Skip to main content
SpringerLink
Log in

A High Efficiency Launcher and Mirror System for Use in a 110 GHZ TE22,6 Mode Gyrotron

  • Published:
International Journal of Infrared and Millimeter Waves Aims and scope Submit manuscript

Abstract

A four-mirror internal quasi-optical mode converter designed for a CPI gyrotron is discussed. Many improved methods were used in designing the mode converter. The launcher was designed and analyzed using the TOL and Surf3d codes developed by CCR. Mirrors 1 and 2 were designed using analytic surfaces to shape the general wavefront curvature of the beam radiated from the launcher. Mirrors 3 and 4 were iteratively designed using improved techniques that produced smooth mirror surfaces. Good agreement was found between theory and low-power cold-test measurements. The fraction of power coupled between the target Gaussian beam and the output of mirror 4, inferred from measurements, was 0.990. The stray radiation from the internal quasi-optical mode converter, inferred from measurements, was only 1.9% of the total power radiated from the launcher. This resulted in a high overall system efficiency of 97.0%, which is greater than previous designs.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Fig. 1
Fig. 2
Fig. 3
Fig. 4
Fig. 5
Fig. 6
Fig. 7
Fig. 8
Fig. 9
Fig. 10

Similar content being viewed by others

References

  1. K. Ohkubo, S. Kubo, H. Idei, M. Sato, T. Shimozuma, and Y. Takita, Coupling of tilting gaussian beam with hybrid mode in the corrugated waveguide, Int. J. Infrared Millim. Waves 18(1), 23–41 (1997)

    Google Scholar 

  2. K. Ohkubo, S. Kubo, H. Idei, M. Sato, T. Shimozuma, and Y. Takita, Coupling analysis of gauss-laguerre beam with hybrid mode, Proceedings of the Tenth Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Heating, pp. 597–604, 1997.

  3. J. M. Neilson, Surf3d and TOL: Computer codes for design and analysis of high-performance QO Launchers in Gyrotrons, 29th International Conference on Infrared and Millimeter Waves, Karlsruhe, Germany, pp. 667–668, Sept. 27–Oct. 1, 2004.

  4. B. Z. Katsenelenbaum and V. V. Semenov, Synthesis of phase correctors shaping a specified field, Radio Eng. Electron. Phys. 12, 223–231 (1967)

    Google Scholar 

  5. A. A. Bogdashov, A. V. Chirkov, G. G. Denisov, D. V. Vinogradov, A. N. Kuftin, V. I. Malygin, and V. E. Zapevalov, Mirror synthesis for gyrotron qausi-optical mode converters, Int. J. Infrared Millim. Waves 16(4), 735–744 (1995), April

    Article  Google Scholar 

  6. G. G. Denisov, M. I. Petelin, and D. V. Vinogradov, Converter of high-mode of a circular waveguide into the main mode of a mirror line, PCT Gaz. 16, 47–49 (1990)

    Google Scholar 

  7. G. G. Denisov, A. N. Kuftin, V. I. Malygin, N. P. Venediktov, D. V. Vinogradov, and V. E. Zanevalov, 110 GHz gyrotron with a built-in high-efficiency converter, Int. J. Electron. 72(5 and 6), 1079–1091 (1992)

    Google Scholar 

  8. M. Blank, K. Kreischer, and R. J. Temkin, Theoretical and experimental investigation of a quasi-optical mode converter for a 110-GHz gyrotron, IEEE Trans. Plasma Sci. 24(3), 1058–1066 (1996), June

    Article  Google Scholar 

  9. J. M. Neilson, Surface integral equation analysis of quasi-optical launchers, IEEE Trans. Plasma Sci. 30(3), 794–799 (2002), June

    Article  Google Scholar 

  10. W. C. Chew, J. M. Jin, C. C. Lu, E. Michielssen, and J. M. Song, Fast solution methods in electromagnetics, IEEE Trans. Antennas Propag. 45(3), 533–543 (1997), March

    Article  Google Scholar 

  11. M. P. Perkins, The Design of Beam Shaping Mirrors for Gyrotrons to Aid Injection of an Electromagnetic Beam into a Corrugated Waveguide, Doctoral Dissertation, University of Wisconsin-Madison, 2004.

  12. M. P. Perkins and R. J. Vernon, Iterative design of a cylindrical-based beam-shaping mirror pair for use in a gyrotron internal quasi-optical mode converter, 29th International Conference on Infrared and Millimeter Waves, Karlsruhe, Germany, pp. 489–490, Sept. 27–Oct. 1, 2004.

  13. J. M. Neilson, Optimal synthesis of quasi-optical launchers for high-power gyrotrons, IEEE Trans. Plasma Sci. 34(3), 635–641 (2006), June

    Article  MathSciNet  Google Scholar 

  14. B. M. Harper, Private communications, Tomo Therapy, Feb. 2003.

  15. A. V. Chirkov, G. G. Denisov, and N. L. Aleksandrov, 3D wavebeam field reconstruction from intensity measurements in a few cross sections, Opt. Commun. 115, 449–452 (1995), April

    Article  ADS  Google Scholar 

  16. H. Idei, T. Shimozuma, M. A. Shapiro, T. Notake, S. Kubo, and R. J. Temkin, Experimental verification of phase retrieval of quasi-optical millimeter-wave beams, IEEE Trans. Microwave Theor. Tech. 54(11) (2006), November

  17. D. R. Denison, T. S. Chu, M. A. Shapiro, and R. J. Temkin, Gyrotron internal mode converter reflector shaping from measured field intensity, IEEE Trans. Plasma Sci. 27(2), 512–519 (1999), April

    Article  Google Scholar 

  18. K. Felch, M. Blank, P. Borchard, T. S. Chu, J. Feinstein, H. R. Jory, J. A. Lorbeck, C. M. Loring, Y. M. Mizuhara, J. M. Neilson, R. Schumacher, and R. J. Temkin, Long-pulse and CW tests of a 110-GHz gyrotron with an internal, quasi-optical converter, IEEE Trans. Plasma Sci. 24(3), 558–569 (1996), June

    Article  Google Scholar 

Download references

Acknowledgements

We would like to thank T. S. Chu of CPI for his help in fabricating the mirrors and for helpful discussions. This work was supported by the US Dept. of Energy under contract DE-FE02-85ER52122.

Author information

Authors and Affiliations

  1. Lawrence Livermore National Laboratory, Livermore, CA, 94550, USA

    Michael P. Perkins

  2. Department of Electrical and Computer Engineering, University of Wisconsin, Madison, WI, 53706, USA

    Rong Cao & Ronald J. Vernon

  3. Calabazas Creek Research, Saratoga, CA, 95070, USA

    Jeffrey M. Neilson

Authors
  1. Michael P. Perkins
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Rong Cao
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. Jeffrey M. Neilson
    View author publications

    You can also search for this author in PubMed Google Scholar

  4. Ronald J. Vernon
    View author publications

    You can also search for this author in PubMed Google Scholar

Corresponding author

Correspondence to Michael P. Perkins.

Rights and permissions

Reprints and permissions

About this article

Cite this article

Perkins, M.P., Cao, R., Neilson, J.M. et al. A High Efficiency Launcher and Mirror System for Use in a 110 GHZ TE22,6 Mode Gyrotron. Int J Infrared Milli Waves 28, 207–218 (2007). https://doi.org/10.1007/s10762-007-9200-5

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s10762-007-9200-5

Keywords

Search

Navigation