Spectral characteristics of a 140-GHz long-pulsed gyrotron

IEEE Transactions on Plasma Science

Volumn 35, Issue 3, 2007, Pages 559-564

  Han, Seong Tae ^a   Griffin, Robert G ^b,c   Hu, Kan Nian ^b   Joo, Chan Gyu ^b   Joye, Colin D ^a   Sirigiri, Jagadishwar R ^a   Temkin, Richards J ^a   Torrezan, Antonio C ^a   Woskov, Paul P ^a  

^a MASSACHUSETTS INSTITUTE OF TECHNOLOGY   (United States)

^b MASSACHUSETTS INSTITUTE OF TECHNOLOGY   (United States)

^c MASSACHUSETTS INSTITUTE OF TECHNOLOGY   (United States)

Author keywords

Frequency pulling; Gyrotrons; Linewidth; Thermal tuning; Transient downshift of frequency

Indexed keywords

LINEWIDTH; MILLIMETER WAVES; NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY; TEMPERATURE CONTROL;

FREQUENCY PULLING; THERMAL TUNING; TRANSIENT DOWNSHIFT OF FREQUENCY;

GYROTRONS;

EID: 34347382947     PISSN: 00933813     EISSN: None     Source Type: Journal    
DOI: 10.1109/TPS.2007.896931     Document Type: Article

References (28)

1. J. Wiltse, "Introduction and overview of millimeter waves," in Infrared and Millimeter Waves, vol. 4, K. J. Button and J. C. Wiltse, Eds. New York: Academic, 1981.
2. P. H. Siegel, "Terahertz technology," IEEE Trans. Microw. Theory Tech., vol. 50, no. 3, pp. 910-928, Mar. 2002.
3. L. Becerra et al., "Dynamic nuclear polarization with a cyclotron resonance maser at 5 T," Phys. Rev. Lett., vol. 71, no. 21, pp. 5361-5364, Nov. 1993.
4. L. Becerra et al., "A spectrometer for dynamic nuclear polarization and electron paramagnetic resonance at high frequencies," J. Mag. Res., vol. 117, no. 1, pp. 28-40, Nov. 1995.
5. I. Ogawa et al., "Plasma scattering measurement using a submillimeter wave gyrotron as a radiation source," in Proc. 30th Int. Conf. Infrared and Millim. Waves, 2005, vol. 2, pt. 2, pp. 381-382.
6. S. Michelsen et al., "Fast ion millimeter-wave CTS diagnostics on TEXTOR and ASDEX upgrade," Rev. Sci. Instrum., vol. 75, no. 10, p. 3634, Oct. 2004.
7. H. Bindslev et al., "Fast-ion velocity distributions in JET measured by collective Thomson scattering," Phys. Rev. Lett., vol. 83, no. 16, p. 3206, Oct. 1999.
8. C. D. Joye et al., "Operational characteristics of a 14-W 140-GHz gyrotron for dynamic nuclear polarization," IEEE Trans. Plasma Sci. vol. 34, no. 3, pp. 518-523, Jun. 2006.
9. V. S. Bajaj et al., "Dynamic nuclear polarization at 9 Tesla using a novel 250 GHz gyrotron microwave source," J. Magn. Res., vol. 160, no. 2, pp. 85-90, Feb. 2002.
10. V. S. Bajaj et al., "A continuous duty cycle 250 GHz gyrotron oscillator for dynamic nuclear polarization in biological solid state NMR," J. Magn. Res. to be published.
11. M. K. Hornstein et al. "Second harmonic operation at 460 GHz and broadband continuous frequency tuning of a gyrotron oscillator," IEEE Trans. Electron Devices, vol. 52, no. 5, pp. 798-807, May 2005.
12. M. K. Hornstein et al., "Continuous-wave operation of a 460-GHz second harmonic gyrotron oscillator," IEEE Trans. Plasma Sci., vol. 34, no. 3, pp. 524-533, Jun. 2006.
13. K. E. Kreischer et al., "Frequency pulling and bandwidth measurements of a 140 GHz pulsed gyrotron," Int. J. Electron., vol. 57, no. 6, pp. 851-862, Dec. 1984.
14. J. S. Machuzak et al., "Linewidth measurements of the JET energetic ion and alpha particle collective Thomson scattering diagnostic gyrotron," Rev. Sci. Instrum., vol. 70, no. 1, pp. 1154-1157, Jan. 1999.
15. G. S. Nusinovich, Introduction to the Physics of Gyrotrons, J. Hopkins, Ed. Baltimore, MD: Johns Hopkins Univ. Press, 2004.
16. G. Dammertz et al., "Development of a 140-GHz 1-MW continuous wave gyrotron for the W7-X stellarator," IEEE Trans. Plasma Sci., vol. 30, no. 3, pp. 808-818, Jun. 2002.
17. M. Blank et al., "Demonstration of a high-power long-pulse 140-GHz gyrotron oscillator," IEEE Trans. Plasma Sci., vol. 32, no. 3, pp. 867-876, Jun. 2004.
18. P. Woskov et al., "Frequency measurements of the gyrotrons used for CTS diagnostics at TEXTOR and ASDEX upgrade," Rev. Sci. Instrum. vol. 77, no. 10, p. 10E524, Oct. 2006.
19. G. I. Zaginaylov et al., "Influence of background plasma on electromagnetic properties of 'cold' gyrotron cavity," IEEE Trans. Plasma Sci., vol. 34, no. 3, pp. 512-517, Jun. 2006.
20. G. S. Nusinovich et al., "Slow processes in startup scenarios of long-pulse gyrotrons," Phys. Plasmas, vol. 13, no. 8, p. 083 106, Aug. 2006.
21. K. E. Kreischer et al., "High efficiency operation of a 140 GHz pulsed gyrotron," Int. J. Electron., vol. 57, no. 6, pp. 835-850, 1984.
22. A. W. Fliflet et al., "A self-consistent field theory for gyrotron oscillators: Application to a low Q gyromonotron," Int. J. Electron., vol. 53, no. 6, pp. 505-521, Dec. 1982.
23. T. Hori et al., "Relationship among frequency, temperature of the cooling water and beam current in submillimeter wave gyrotron FU-IV," Rev Sci. Instrum., vol. 76, no. 2, p. 023 502, Feb. 2005.
24. M. Botton et al., "MAGY: A time-dependent code for simulation of slow and fast microwave sources," IEEE Trans. Plasma Sci., vol. 26, no. 3, pp. 882-892, Jun. 1998.
25. O. Dumbrajs and G. S. Nusinovich, "Effect of technical noise on radiation linewidth in free-running gyrotron oscillators," Phys. Plasmas, vol. 4, no. 5, pp. 1413-1423, May 1997.
26. J. P. Calame, B. G. Danly, and M. Garven, "Measurements of intrinsic shot noise in a 35 GHz gyroklystron," Phys. Plasmas, vol. 6, no. 7, pp. 2914-2925, Jul. 1999.
27. T. Idehara et al., "Accurate frequency measurement of a submillimeter wave gyrotron output using a far-infrared laser as a reference," Rev. Sci. Instum., vol. 74, no. 5, pp. 2860-2862, May 2003.
28. Y. Terumichi et al., "Study of low frequency density fluctuations in the WT-2 Tokamak by MM and submm wave scattering," in Proc. Conf. Dig. 9th Int. Conf. Infrared and Millim. Waves, Takarazuka, Japan, 1984, pp. 411-412.