A way to increase the efficiency of klystrons

Guzilov, I. A.; Maslennikov, O.Yu.; Konnov, A. V.

doi:10.1109/ivec.2013.6571181

Cited by 3 publications

(2 citation statements)

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“…[4] Finally the drift tube section is replaced with cavity layout of the higher efficiency design which is recently developed using the concept of bunch core oscillation and the BAC technology. [7,8] So, we can try to check the design exactness. However, full power rating evaluation is not always required.…”

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confidence: 99%

Design Consideration of 650-MHz Circular Electron–Positron Collider Klystron and Simulation of Its Beam Tester

Zaib

Fukuda

Zhou

et al. 2017

Chinese Phys. Lett.

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We present the first phase R&D for the 800 kW cw, 650 MHz klystron for the future circular electron–positron collider (CEPC) project in China. The CEPC requires 192 klystrons and it is desired to be designed in the Institute of High Energy Physics, CAS, and manufactured domestically. Therefore, we present the manufacturing schedule of this project; the three-stage development from the beam test tube to the klystron having a high efficiency structure. Design of the beam test tube that comprises electron gun and collector is presented. First, gun simulation having a modulating anode is performed using DGUN software. The uniform beam trajectories with a beam perveance of 0.64 μA/V3/2 are simulated. We employ a Ba-dispenser cathode of radius 35 mm with ϕ10 hole at the center and obtain a current density on cathode less than 0.45 A/cm2. The beam trajectories are also simulated over beam test tube of length about 2 m with a magnetic field of 213 Gauss. Thermal analysis of the collector is performed using the ANSIS-CFX code and hence the cooling structure is determined. Mechanical design is almost carried out and it is in manufacturing stage.

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confidence: 99%

Design Consideration of 650-MHz Circular Electron–Positron Collider Klystron and Simulation of Its Beam Tester

Zaib

Fukuda

Zhou

et al. 2017

Chinese Phys. Lett.

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“…One of the possibilities of voltage lowering is the use of multibeam design, which makes possible total current enlarging at limited perveance of partial beam by means of beams number increasing. This approach was successfully realized in variety of works [4,5], making possible to achieve output power 7 MW at power supply voltage ~60 kV. They employed annular resonators operating on fundamental, axially symmetrical mode E 010 , providing rf field uniformity on all beams and sufficient frequency separation of fundamental and nearest parasitic modes.…”

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confidence: 99%

On Prospects of Output Power Increasing in Low-Voltage Multibeam Klystrons for Electron Accelerators

Galdeckiy¹

2022

Infocommunications and Radio Technologies

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Physical principles of output power limitation in low-voltage multibeam klystrons are considered. It is demonstrated that metamaterial consisting of array of metal inductive inserts and located in the cavity’s interaction region makes possible significant increasing of phase velocity of transversal wave in the gap. This reveals the opportunity to enhance uniformity of the RF field interacting with the beams in the gap, interaction region diameter, beams current and power of the klystron without cathode voltage increase. Resonators in S and Ka bands are analyzed.

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