Analysis of the Multipactor Effect in an RF Electron Gun Photoinjector

被引：2

作者：

Gonzalez-Iglesias, D. ^{[1
]}

Esperante, D. ^{[1
]}

Gimeno, B. ^{[1
]}

Blanch, C. ^{[1
]}

Fuster-Martinez, N. ^{[1
]}

Martinez-Reviriego, P. ^{[1
]}

Martin-Luna, P. ^{[1
]}

Fuster, J. ^{[1
]}

Alesini, D. ^{[2
]}

机构：

[1] Univ Valencia, Inst Fis Corpuscular IFIC, CSIC, Paterna 46980, Spain

[2] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Rome, Italy

来源：

IEEE TRANSACTIONS ON ELECTRON DEVICES | 2023年 / 70卷 / 01期

关键词：

Magnetic tunneling; Multipactor effect; photoinjector; RF breakdown; RF gun;

D O I：

10.1109/TED.2022.3221035

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The objective of this work is the evaluation of the risk of suffering a multipactor discharge within an RF electron gun photoinjector. Photoinjectors are a type of source for intense electron beams, which are the main electron source for synchrotron light sources, such as free-electron lasers. The analyzed device consists of 1.6 cells and it has been designed to operate at the S-band. Besides, around the RF gun there is an emittance compensation solenoid, whose magnetic field prevents the growth of the electron beam emittance, and thus the degradation of the properties of the beam. The multipactor analysis is based on a set of numerical simulations by tracking the trajectories of the electron cloud in the cells of the device. To reach this aim, an in-house multipactor code was developed. Specifically, two different cases were explored: with the emittance compensation solenoid assumed to be off and with the emittance compensation solenoid in operation. For both the cases, multipactor simulations were carried out exploring different RF electric field amplitudes. Moreover, for a better understanding of the multipactor phenomenon, the resonant trajectories of the electrons and the growth rate of the electrons population are investigated.

引用

页码：288 / 295

页数：8

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