Electron Gun Design for Fundamental Mode S-Band Multiple-Beam Amplifiers

Nguyen, Khanh; Pershing, D.E.; Abe, David K.; Levush, B.; Wood, F.; Calame, J.P.; Pasour, John; Petillo, John; Cusick, Michael; Cattelino, M.; Wright, E. L.

doi:10.1109/tps.2004.828803

Cited by 36 publications

(8 citation statements)

References 8 publications

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“…In this section, we provide a brief description of the experiment; details of the design of the eight-beam gun and four-cavity circuit can be found in [7] and [4], respectively.…”

Section: Description Of the Nrl Mbkmentioning

confidence: 99%

“…Magnetic flux is excluded from the anode-cathode region of the gun by means of an iron pole-piece (Brillouin focusing). The gun pole-piece is designed to ensure that, upon entering the pole-piece aperture, each beamlet experiences a radial magnetic field that is symmetric about the longitudinal axis of the aperture [7]. Power is extracted from the final cavity through a single waveguide, and the spent beam is collected in a single-stage, air-cooled collector that is electrically isolated from the circuit to facilitate measurement of the transmitted current.…”

Section: Description Of the Nrl Mbkmentioning

confidence: 99%

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Demonstration of an S-band, 600-kW fundamental-mode multiple-beam klystron

Abe

Pershing²,

Nguyen³

et al. 2005

IEEE Electron Device Lett.

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We present initial experimental results from the successful operation of a 600-kW peak, fundamental-mode multiple-beam klystron (MBK). The eight-beam device operates at a cathode voltage of 45 kV and a total beam current of 32 A with an axial guiding magnetic field of 1.8-2.2 kG. In the absence of radio-frequency (RF) drive, the measured beam transmission is in excess of 99%; at a driven frequency of 3.25 GHz, the measured beam transmission at saturation is 97%, where the four-cavity circuit generates a peak power of 600 kW with an electronic efficiency of 40%. The measured beam transport and RF performance are in excellent agreement with predictions made by the three-dimensional gun/collector code, MICHELLE, and the large-signal klystron code, TESLA. The accuracy of the design codes enabled the achievement of a working device in a single hardware design pass. Index Terms-Multibeam, multiple-beam amplifier (MBA), multiple-beam klystron (MBK).

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“…In this section, we provide a brief description of the experiment; details of the design of the eight-beam gun and four-cavity circuit can be found in [7] and [4], respectively.…”

Section: Description Of the Nrl Mbkmentioning

confidence: 99%

Section: Description Of the Nrl Mbkmentioning

confidence: 99%

Demonstration of an S-band, 600-kW fundamental-mode multiple-beam klystron

Abe

Pershing²,

Nguyen³

et al. 2005

IEEE Electron Device Lett.

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“…1, is the second in a series of S-band MBKs developed at the Naval Research Laboratory and was designed to produce a peak output power of 600 kW with a 3-dB instantaneous bandwidth of ~6%. The eight-beam electron gun is of the same design as used in our previous MBK and operates at a nominal cathode voltage of 45 kV and a total current of 32 A [1,2]. The electrodynamic circuit is comprised of a two-gap input cavity, a two-gap idler cavity, two additional single-gap idler cavities, and a two-gap output cavity and has a total length of 22 cm [3].…”

Section: Introductionmentioning

confidence: 99%

Experimental demonstration of MBK2, an eight-beam, five-cavity multiple-beam klystron

Abe

Qiu

Levush

et al. 2008

2008 IEEE International Vacuum Electronics Conference

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“…This is the impetus for our MBK research and development effort. Our first MBK [1] was powered by a 45 kV, 32 A, eight-beam, electron gun [2], and the objective was to demonstrate beam generation and transport with and without RF. This narrow-band (~2%) 600-kW tube was successfully tested at the Naval Research Laboratory (NRL) [3].…”

Section: Introductionmentioning

confidence: 99%