Sheet Beam Klystron Simulations Using AJDISK

Jensen, Aaron; Caryotakis, G.; Scheitrum, G.; Sprehn, D.; Steele, Brooke N.

doi:10.1109/ivelec.2006.1666396

Cited by 9 publications

(5 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The design was simulated using four codes: TESLA [19], from the Naval Research Laboratory; AJDISK from A. Jensen [20], KLYC from CERN [10], and MAGIC-2D [21,22]. The results are shown in table 1.…”

Section: High Efficiency Klystronmentioning

confidence: 99%

High efficiency, low cost, RF sources for accelerators and colliders

et al. 2023

View full text Add to dashboard Cite

Accelerators for High Energy Physics (HEP) are large users of energy, much of it in the form of radiofrequency (RF) power to accelerate particles to very high energies. Proposed HEP projects will require even larger amounts of RF energy. Increasing concerns of the cost and availability of energy will require the HEP community to use energy as efficeintly as possible. Successful transfer of HEP technology to the public and private sectors will be most effective if it is highly efficient. Historically, the HEP community has utilized available RF power sources, mainly in the form of vacuum tube technology, much of which was developed during the cold war or is otherwized used in the private sector. The private sector is moving to solid-state RF sources which do not exibit the electrical efficiency that is needed for future HEP projects. Here, we summarize the state of the development of a number of RF sources that promise efficeincies of 80% and above. We also outline future efforts that are needed to fully realize the potential of these sources.

show abstract

Section: High Efficiency Klystronmentioning

confidence: 99%

High efficiency, low cost, RF sources for accelerators and colliders

et al. 2023

View full text Add to dashboard Cite

show abstract

“…Several different codes are used to simulate the beam-wave interaction. AJDISK [13] is a onedimensional (1D) large signal klystron simulation software based on disk model developed by SLAC, which is mainly used for parameters optimization due to its fast calculation speed. The klystron efficiency depends largely on the quality of electron bunching.…”

Section: Beam-wave Interaction Simulationmentioning

confidence: 99%

Design and high-power test of 800-kW UHF klystron for CEPC

Xiao¹,

Fukuda²,

Zhou³

et al. 2022

Chinese Phys. B

View full text Add to dashboard Cite

To reduce the energy demand and operation cost for circular electron positron collider (CEPC), the high efficiency klystrons are being developed at Institute of High Energy Physics, Chinese Academy of Sciences. A 800-kW continuous wave (CW) klystron operating at frequency of 650-MHz has been designed. The results of beam–wave interaction simulation with several different codes are presented. The efficiency is optimized to be 65% with a second harmonic cavity in three-dimensional (3D) particle-in-cell code CST. The effect of cavity frequency error and mismatch load on efficiency of klystron have been investigated. The design and cold test of reentrant cavities are described, which meet the requirements of RF section design. So far, the manufacturing and high-power test of the first klystron prototype have been completed. When the gun operated at DC voltage of 80 kV and current of 15.4 A, the klystron peak power reached 804 kW with output efficiency of about 65.3% at 40% duty cycle. The 1-dB bandwidth is ±0.8 MHZ. Due to the crack of ceramic window, the CW power achieved about 700 kW. The high-power test results are in good agreement with 3D simulation.

show abstract

“…where E sz (z) is the RF space charge electric field at position z, I z (z) is the modulated current density at position z; r 1 , r 2 and r c are the inner beam, outer beam and the tunnel radii respectively. Here, µ 0n is n th root of 0-order Bessel function and g is the Lorentz factor that contributes to the longitudinal contraction [31]. S is the cross-sectional area of beam and % is the beam velocity.…”

Section: Small Signal Theorymentioning

confidence: 99%

Accurate Modeling of Monotron Oscillations in Small- and Large-Signal Regimes

Cai

Syratchev

2020

IEEE Trans. Electron Devices

View full text Add to dashboard Cite

In Klystron amplifiers, monotron oscillations may cause unacceptable beam instabilities. To facilitate fast and accurate analysis of such processes, rather than performing timeconsuming Particle-in-Cell simulations, the theory of the monotron oscillations has been further developed for the small and large signal regimes and implemented into the klystron computer code KlyC. This development includes full considerations of the space charge effects, relativistic effects and can operate with arbitrary field distributions of the resonant mode. The effectiveness of these methods, have been demonstrated through benchmarking against PIC codes and has shown good (at 1% level) agreement, whilst KlyC computation time is significantly (at least 100 times) faster than in the PIC simulations.

show abstract

Sheet Beam Klystron Simulations Using AJDISK

Cited by 9 publications

References 2 publications

High efficiency, low cost, RF sources for accelerators and colliders

High efficiency, low cost, RF sources for accelerators and colliders

Design and high-power test of 800-kW UHF klystron for CEPC

Accurate Modeling of Monotron Oscillations in Small- and Large-Signal Regimes

Contact Info

Product

Resources

About