Very long pulse high power klystrons for FEL and their generating conditions

Faillon, G.; Bearzatto, C.

doi:10.1080/00207218808945255

Cited by 2 publications

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“…For klystrons with a modulating anode, the opinion is that a 2.5 MW output power should result in a good rf system design. The cathode pulsed klystron, without a modulation anode, could be made to much higher power, and 5 MW was chosen as a reasonable limit for this project [2]. Higher peak powers at this pulse length may be possible, but the klystron would require development, and this means risk to the program.…”

Section: Technology Choicesmentioning

confidence: 99%

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The RF system for the National Spallation Neutron Source linac

Tallerico

Billen²,

Jason³

et al.

Proceedings of the 1997 Particle Accelerator Conference (Cat. No.97CH36167)

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has been proposed to dramatically improve the neutron capabilities for science applications in the US. The NSNS is a fast pulse neutron source that would consist of a 1000 MeV H-linac, an accumulator ring, a neutron target, and an experimental area. Although the NSNS is to be built at Oak Ridge, the design responsibility is delegated to five US national laboratories, and the Los Alamos National Laboratory is responsible for the linac portion of this machine, from the output of the radio frequency quadrupole (RFQ) accelerator, to the entrance to the accumulator ring. In the baseline design, a total of 59 klystrons are used to provide the RF power for a 1-MW average power beam in the accumulator ring, and a 1.04 ms pulse length, 6.24% duty factor beam in the linac. The fiequencies chosen are 402.5 MHz for the RFQ and drift tube linac (DTL) portions of the machine, and 805 MHZ for the coupled-cavity DTL (CCDTL) and coupled cavity (CCL) portions of the linac. The baseline 805 M H z klystron is capable of 2.5 MW peak power into a flat load, and it contains a modulating anode. The backup 805 MHz klystron is cathode pulsed, and has a 5 MW peak output power. The modulators for these two klystrons are vastly different. The challenges and compromises for the two klystrons and their associated modulators and RF systems are discussed. The baseline design RF system is presented in detail. IntroductionThe klystron is used in most high power, high energy

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Section: Technology Choicesmentioning

confidence: 99%

“…The amplifier size was chosen as 2.5 M W , the maximum power for a long-pulse klystrons with a modulation anode [2], to minimize the cost and maximize the reliability of the RF system. Two klystrons will be placed in each modulator, and Fig.…”

Section: Introductionmentioning

confidence: 99%