Operation of a 1.3 GHz, 10 MW multiple beam klystron

Balkcum, Adam; Wright, E. L.; Bohlen, H.; Cattelino, M.; Cox, L.; Cusick, Michael; Eppley, K.; Forrest, Scott; Friedlander, F.; Staprans, A.; Zitelli, L.

doi:10.1109/ivelec.2004.1316316

Cited by 10 publications

(3 citation statements)

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“…The output power is the product of the RF current I 1 and the maximum voltage that can be developed across the output gap without reflecting electrons, which is the beam voltage V 0 . Both are peak values, so (19) Consequently, for the two-cavity klystron, without space charge and with sinusoidal voltage modulation, the maximum efficiency is 58%. The above derivation is completely valid, even when there is electron overtaking.…”

Section: Two-cavity "Bunching" Theorymentioning

confidence: 99%

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High Power Klystrons: Theory and Practice at the Stanford Linear Accelerator CenterPart I

Caryotakis¹

2004

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This is Part I of a two-part report on design and manufacturing methods used at SLAC to produce accelerator klystrons. Chapter 1 begins with the history and applications for klystrons, in both of which Stanford University was extensively involved. The remaining chapters review the theory of klystron operation, derive the principal formulae used in their design, and discuss the assumptions that they involve. These formulae are subsequently used in small-signal calculations of the frequency response of a particular klystron, whose performance is also simulated by two different computer codes. The results of calculations and simulations are compared to the actual performance of the klystron.

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Section: Two-cavity "Bunching" Theorymentioning

confidence: 99%

“…21b) is the CPI VKL-8301, which was built for TESLA to the same specification. 19 It is also an MBK, but its design is fundamentally different and is based more on life cycle cost than on initial price. It employs six beams, on a larger "bolt circle" than the French tube, and without a center beam.…”

Section: Fig 18 the Varian X-band 1-mw Cw Klystronmentioning

confidence: 99%

High Power Klystrons: Theory and Practice at the Stanford Linear Accelerator CenterPart I

Caryotakis¹

2004

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“…Earlier this decade, Communications and Power Industries, Inc. (CPI), developed, built, and delivered a vertical prototype of a 10-MW high-efficiency L-band MBK for DESY [1], [7]. Different designs for the same application have been developed by Toshiba and Thales [2], [3].…”

Section: Introductionmentioning

confidence: 99%

High-Power High-Efficiency L-band Multiple-Beam Klystron Development at CPI

Habermann

Balkcum

Begum

et al. 2010

IEEE Trans. Plasma Sci.

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Communications and Power Industries, Inc., has designed and manufactured two versions of a 10-MW-peak highefficiency multiple-beam klystron (MBK) operating at 1300 MHz. This type of klystron is favored for large particle accelerator projects such as the European X-ray Free-Electron Laser at the Deutsches Elektronen Synchrotron (DESY). Two klystrons have been made for DESY. The first-generation MBK was a vertically oriented prototype using a six-cavity design with higher order mode input and output cavities and conventional intermediate cavities. For cost and performance reasons, the secondgeneration MBK, designated VKL-8301B, utilized seven coaxial fundamental-mode cavities and is an "industrialized" horizontally oriented klystron. The klystron was designed and optimized using state-of-the-art multidimensional design codes to ensure that all performance requirements are exceeded. Agreement between the simulated and measured performances is good. The VKL-8301B prototype achieved a peak saturated RF output power of 10.4 MW and 67.8% efficiency. The data were measured at the full 1.5% duty and with 1.5-ms pulse width. The klystron satisfied all required operating conditions, including stable operation into an output mismatch of 1.2 : 1 voltage standing wave ratio at various phases. The prototype has been shipped to DESY and has been successfully tested by a customer.

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