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19 Apr 2010

Volume 96, Issue 16, Articles (16xxxx)

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Appl. Phys. Lett. 96, 163101 (2010); http://dx.doi.org/10.1063/1.3327831 (3 pages)

Ramesh Nath, Seungbum Hong, Jeffrey A. Klug, Alexandra Imre, Michael J. Bedzyk, Ram S. Katiyar, and Orlando Auciello
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Theoretical investigation of a high efficiency and broadband subterahertz gyrotron

Nai-Ching Chen, Tsun-Hsu Chang, Ching-Pin Yuan, Toshitaka Idehara, and Isamu Ogawa

Appl. Phys. Lett. 96, 161501 (2010); http://dx.doi.org/10.1063/1.3400216 (3 pages) | Cited 8 times

Online Publication Date: 19 April 2010

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This study investigates the electron dynamics of gyrotron interaction in a tapered waveguide and proposes an interaction structure for a 0.2 THz TE02 reflective gyrotron backward-wave oscillator (gyro-BWO). The design shows the advantages of high power, continuous, and broadband frequency tuning, mode converter free, and inherently possesses mode-selective ability to suppress the potentially competing TE22 mode. Calculated results indicate that the reflective TE02 gyro-BWO is capable of generating a peak power of 3.3 kW corresponding to 26.3% interacting efficiency with a broad 3dB tuning bandwidth of 6.9 GHz at beam current Ib = 0.5 A and beam voltage Vb = 25 kV.
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84.40.Ik Masers; gyrotrons (cyclotron-resonance masers)
84.40.Fe Microwave tubes (e.g., klystrons, magnetrons, traveling-wave, backward-wave tubes, etc.)
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