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An FEL-based microwave system for fusion

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Abstract

This paper describes designs for 280-GHz and 560-GHz microwave sources based on free electron lasers (FELs). These 10-MW units are based on technology developed over the last 5 years. A first demonstration of high-average-power microwave production with an FEL system is expected in the Microwave Tokamak Experiment (MTX) facility. This paper gives details on the design and construction of that 250-GHz, 2-MW system and discusses specific applications for the Compact Ignition Tokamak (CIT).

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References

  1. K. I. Thomassen, (1988). Millimeter wave tokamak heating and current drive with a high power free-electron-laser.Plasma Phys. Cont. Fusion,30, 57.

    Google Scholar 

  2. W. M. Nevins, T. D. Rognlien, and B. I. Cohen, (1987). Nonlinear absorption of intense microwave pulses.Phys. Rev. Lett.,59, 60.

    Google Scholar 

  3. W. M. Nevins, (1986). Private communication; K. I. Thomassen, ed. Free-electron laser experiments in Alcator-C. LLL-Prop-002, Lawrence Livermore National Laboratory, July 1986.

  4. T. D. Rognlien, (1983). Frequency splitting and collisional decorrelation for removing superadiabatic barriers in ECRH experiments.Nucl. Fusion,23, 163.

    Google Scholar 

  5. T. D. Rognlien, Private communication.

  6. A. Cardinali, M. Lontano, and A. M. Sergeev, (1989). Dynamical self-focusing of the high-power FEL radiation in a magnetized plasma.Phys. Fluids,B1, 901.

    Google Scholar 

  7. B. I. Cohen,et al. (1988). Plasma heating and current drive using intense, pulsed microwaves. Proceedings International Workshop on Theory of Fusion Plasma, Chexbres, Switzerland, October 3–7.

  8. C. E. Max, (1976). Strong focusing due to the ponderomotive force in plasmas.Phys. Fluids,19, 74.

    Google Scholar 

  9. M. Porkolab and B. I. Cohen, (1988). Parametric instabilities associated with intense electron cyclotron heating in the MTX tokamak.Nucl. Fusion,28, 239.

    Google Scholar 

  10. B. Hui, E. Ott, P. T. Bonoli, and P. N. Guzdar, (1981). Scattering of electron cyclotron resonance heating waves by density fluctuations in tokamak plasmas.Nucl. Fusion,21, 339.

    Google Scholar 

  11. E. Ott, B. Hui, and K. R. Chu, (1980). Theory of electron cyclotron heating of tokamak plasmas.Phys. Fluids,23, 1031.

    Google Scholar 

  12. T. J. Orzechowski, B. R. Anderson, J. C. Clark, W. M. Fawley, A. C. Paul, D. Prosnitz, E. T. Scharlemann, and S. M. Yarema, (1986). High-efficiency extraction of microwave radiation from a tapered-wiggler free electron laser.Phys Rev. Lett.,57, 2172.

    Google Scholar 

  13. T. J. Orzechowski, B. R. Anderson, J. C. Clark, W. M. Fawley, A. C. Paul, D. Prosnitz, E. T. Scharlemann, S. M. Yarema, A. M. Sessler, D. B. Hopkins, and J. S. Wurtele, (1986). High gain and high extraction efficiency from free electron laser amplifier operating in the millimeter wave regime.Nucl. Instr. Meth. Phys.,A259, 144.

    Google Scholar 

  14. A. L. Throop, T. J. Orzechowski, B. R. Anderson, F. W. Chambers, J. C. Clark, W. M. Fawley, R. A. Jong, A. C. Paul, D. Prosnitz, E. T. Scharlemann, R. D. Stever, G. A. Westenskow, and S. M. Yarema, (1987). Experimental characteristics of a highgain free-electron laser amplifier operating at 8-mm and 2-mm wavelengths. AIM 19th Fluid Dynamics, Plasma Dynamics, and Laser Conference, Honolulu, Hawaii: June 8–10.

  15. T. J. Orzechowski, E. T. Scharlemann, B. Anderson, V. K. Neil, W. M. Fawley, D. Prosnitz, S. M. Yarema, D. B. Hopkins, A. C. Paul, A. M. Sessler, and J. S. Wurtele, (1985). High-gain free electron lasers using induction linear accelerators.IEEE J. Quantum Elec.,QE-21, 831.

    Google Scholar 

  16. E. T. Scharlemann and W. M. Fawley, (1986). Optical modeling of induction-linac driven free-electron lasers. InModeling and Simulation of Optoekctronic Systems, J. Dugan O'Keefe, ed.,Proc. SPIE,642, 2–9.

  17. R. A. Jong, E. T. Scharlemann, and W. M. Fawley, (1987). Wiggler taper optimization for FEL amplifiers with moderate spacecharge effects. Lawrence Livermore National Laboratory, Livermore, California, UCRL-96735, presented at the Ninth International Conference on Free Electron Laser, Williamsburg, Virginia, September 14–18, 1987; to be published inNucl. Inst. Meth.

    Google Scholar 

  18. T. J. Orzechowski, B. R. Anderson, W. M. Fawley, D. Prosnitz, E. T. Scharlemann, and S. M. Yarema, (1985). Microwave radiation from a high-gain free-electron laser amplifier.Phys. Rev. Lett.,54, 889.

    Google Scholar 

  19. M. Caplan, (1987). Design of a electronically tunable millimeter wave gyrotron backward wave oscillator. IEEE Twelfth International Conference on Infrared and Millimeter Waves, Orlando, Florida, December 14–18.

  20. A. J. Hatch, (1966). Suppression of multipactoring in particle accelerators.Nucl. Instr. Meth.,41, 261.

    Google Scholar 

  21. K. Sakamoto, T. Imai, T. Fujii, Y. Ikeda, M. Saigusa, J. Sagawa, and T. Nagashima, (1986). Unipole multipactoring discharge in the LHRF launcher.IEEE Trans. Plasma Sci.,PS-14, 548.

    Google Scholar 

  22. E. T. Scharlemann, W. M. Fawley, B. R. Anderson, and T. J. Orzechowski, (1986). Comparison of the Livermore microwave FEL results at ELF with 2D numerical simulation.Nucl. Instr. Meth.,A250, 150.

    Google Scholar 

  23. R. A. Jong and E. T. Scharlemann, (1987). High gain free-electron laser for heating and current drive in the Alcator-C tokamak.Nucl. Instr. Meth. Phys. Res.,A259, 254.

    Google Scholar 

  24. R. A. Jong and R. R. Stone, (1988). Induction Linac-based freeelectron laser amplifier for fusion applications. Lawrence Livermore National Laboratory, Livermore, California, UCRL-98675, presented at the 10th International FEL Conference, Jerusalem, Israel, August 28-September 2, 1988.

    Google Scholar 

  25. G. A. Deis, (1988). Lawrence Livermore National Laboratory, Livermore, California. Private communication.

  26. N. M. Kroll, P. L. Morton, and M. N. Rosenbluth, (1981). Freeelectron lasers with variable parameters Wigglers.IEEE J. Quantum Eke.,QE-17, 1436.

    Google Scholar 

  27. J. H. Van Sant, (1988). Lawrence Livermore National Laboratory, Livermore, California. Private communication.

  28. G. A. Deis, (1988). Lawrence Livermore National Laboratory, Livermore, California. Private communication.

  29. M. Makowski and G. Listvinsky, (1988). TRW, Redondo Beach, California. Private communication.

  30. B. W. Stallard, (1988). Lawrence Livermore National Laboratory, Livermore, California. Private communication.

  31. S. W. Kang, (1988). Lawrence Livermore National Laboratory, Livermore, California. Private communication.

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Stone, R.R., Jong, R.A., Orzechowski, T.J. et al. An FEL-based microwave system for fusion. J Fusion Energ 9, 77–101 (1990). https://doi.org/10.1007/BF01057323

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