Design of a Ka‐band MW‐level high efficiency gyroklystron for accelerators

Wang, Li; Dong, Kai; He, Wenlong; Wang, Jianxun; Luo, Yong; Cross, Adrian W.; Ronald, K.; Phelps, A. D. R.

doi:10.1049/iet-map.2018.0103

Cited by 10 publications

(2 citation statements)

References 18 publications

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“…High-power amplifiers around 30 GHz have been developed for the application of accelerators (Ka-band Compact Linear Collider; CLIC). [29,30] However, regardless of the very high peak power, such amplifiers are in short pulsed operation and the average power is low. The search sensitivity of dark photons is determined by the average power.…”

Section: Potential Of a High-power Experimentsmentioning

confidence: 99%

Millimeter‐Wave WISP Search with Coherent Light‐Shining‐Through‐a‐Wall Toward the STAX Project

et al. 2023

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A dark photon is one of the simplest extensions of the Standard Model of particle physics and can be a dark matter candidate. Dark photons kinetically mix with ordinary photons. The mass range from 10−4 to 10−3 eV of such dark photons is underconstrained by laboratory‐based experiments and a new search is therefore motivated. In this mass range, dark photons behave like waves rather than particles and the corresponding electromagnetic waves are in the millimeter‐wave range. The technical difficulties of the millimeter waves have prevented so far dark photon experiments in this mass range. The use of coherent millimeter waves to search for dark photons in a Light‐Shining‐through‐a‐Wall (LSW) experiment is proposed. The merits and limitations of coherent wave detection are clarified and the potential of single photon sensors at microwaves is investigated. Development of millimeter‐wave technology is not only limited to dark photons. Technically, an experiment for dark photons by using electromagnetic waves resembles that for axions, another light dark matter candidate, with static magnetic fields. This paper represents an essential step toward axion LSW in the millimeter‐wave range (Sub‐THz‐AXion experiment; STAX) as a potential successor of an on‐going experiment in infrared.

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Section: Potential Of a High-power Experimentsmentioning

confidence: 99%

Millimeter‐Wave WISP Search with Coherent Light‐Shining‐Through‐a‐Wall Toward the STAX Project

et al. 2023

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“…The gyro-devices, based on the cyclotron resonant maser (CRM) instability and with larger dimensions of the interaction circuit, can achieve high output power at higher frequency 33 , 34 . A gyroklystron amplifier operating at 36 GHz was designed to generate 3 MW output with a pulse width of 2 and a repetition rate of 1 kHz 35 . Higher output power from a gyroklystron has been demonstrated in pulsed mode using a coaxial interaction circuit 26 .…”

Section: Power Needed and Potential High-power Microwave Sources To D...mentioning

confidence: 99%

Beam dynamic study of a Ka-band microwave undulator and its potential drive sources

Zhang

Donaldson

Clarke

et al. 2022

Sci Rep

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Microwave undulators (MUs) have great potential to be an alternative solution to permanent magnet undulators in a free electron laser (FEL) when shorter undulator periods are required. In this paper, the factors that affect the choice of the high-power drive sources were studied via a Ka-band cavity-type MU with a corrugated waveguide proposed for the CompactLight X-ray FEL. They include the technology of the high-power vacuum electronic devices, the quality factor of the MU cavity that was demonstrated by prototyping a short section of the MU structure, and the beam dynamic study of the electrons’ trajectories inside the MU. It showed that at high beam energy, a high-power oscillator is feasible to be used as the drive source. At low beam energy, the maximum transverse drift distance becomes larger therefore an amplifier has to be used to minimize the drift distance of the electrons by controlling the injection phase.

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Demonstration of efficient beam-wave interaction for a MW-level 48 GHz gyroklystron amplifier

Nix

Zhang

et al. 2020

Physics of Plasmas

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The development of high-frequency RF linear accelerators (linacs) requires consideration of several technological challenges, such as electron bunch linearization. Presented in this paper is the design of the interaction circuit for a 48 GHz MW-level three-cavity gyroklystron amplifier, appropriate for application as a millimeter wave power source in a 4 th harmonic linearizing system for an X-band linac. The output cavity is operated at the cylindrical TE0,2,1 mode, while the input and buncher cavities are operated at the TE0,1,1 mode. The interaction circuit has been designed using a combination of analytical calculations and particle-in-cell (PIC) simulations. The optimized gyroklystron is shown, through simulation, to deliver an output power of up to 2.3 MW with gain of 36 dB and efficiency of 44% at 48 GHz, when driven by a 140 kV, 37 A electron beam.

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Design of a Ka‐band MW‐level high efficiency gyroklystron for accelerators

Cited by 10 publications

References 18 publications

Millimeter‐Wave WISP Search with Coherent Light‐Shining‐Through‐a‐Wall Toward the STAX Project

Millimeter‐Wave WISP Search with Coherent Light‐Shining‐Through‐a‐Wall Toward the STAX Project

Beam dynamic study of a Ka-band microwave undulator and its potential drive sources

Demonstration of efficient beam-wave interaction for a MW-level 48 GHz gyroklystron amplifier

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