Design of a beam phase cavity and a waveguide coupled eccentric circle structure prebuncher in S-band

	Design of a beam phase cavity and a waveguide coupled eccentric circle structure prebuncher in S-band
	He X(贺祥); Hou M(侯汨); Zhao FL(赵风利); Pei SL(裴士伦); He; Xiang; Hou; Mi; Zhao; Fengli
刊名	HIGH POWER LASER AND PARTICLE BEAMS
	2015
卷号	27 期号:7 页码:75102
关键词	Beam phase Coupling coefficient Prebuncher Real time measurements S-band Symmetrical structure Unloaded quality factors Waveguide coupling
其他题名	S波段束流相位探测腔与偏心式波导耦合预聚束器的设计
通讯作者	贺祥
英文摘要	A new waveguide-coupled prebuncher and a new beam phase cavity working at S-band are designed. For increasing the power capacity, the waveguide coupling mechanism is used instead of the traditional coaxial ring coupling for the prebuncher. An eccentric circle structure of the cavity is adopted to solve the problem of an asymmetric electrical field along the radial direction caused by the introduction of the waveguide coupling window, which improves the beam quality on high beam current. The measurement results of a coupling coefficient of 1.73, an unloaded quality factor of 2195 as well as a variable frequency range from 2 854.55 MHz to 2 856.9 MHz are got in the final prototype of prebuncher. For measuring the timing between beam and RF pulse in order to compensate the input power with the high beam current, a beam phase cavity is chosen to be the on-line equipment for the real-time measurement of beam phase. The beam phase cavity has a rotational symmetrical structure, and two coaxial coupling rings are used to extract the inducted signal from the beam, which will be used as the reference signal of the phase-controlling system. The prototype of beam phase cavity has a measurement result of an unloaded quality factor of 2392, a 3 dB bandwidth of 2.05 MHz as well as a variable frequency range from 2 805.45 MHz to 2 809.45 MHz. The measurement results match well with the simulation results. ©, 2015, Editorial Office of High Power Laser and Particle Beams. All right reserved.
类目[WOS]	714 Electronic Components and Tubes ; 714.3 Waveguides ; 716.1 Information Theory and Signal Processing
收录类别	EI
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/228936]
专题	高能物理研究所_加速器中心
推荐引用方式 GB/T 7714	He X,Hou M,Zhao FL,et al. Design of a beam phase cavity and a waveguide coupled eccentric circle structure prebuncher in S-band[J]. HIGH POWER LASER AND PARTICLE BEAMS,2015,27(7):75102.
APA	贺祥.,侯汨.,赵风利.,裴士伦.,He.,...&Shilun.(2015).Design of a beam phase cavity and a waveguide coupled eccentric circle structure prebuncher in S-band.HIGH POWER LASER AND PARTICLE BEAMS,27(7),75102.
MLA	贺祥,et al."Design of a beam phase cavity and a waveguide coupled eccentric circle structure prebuncher in S-band".HIGH POWER LASER AND PARTICLE BEAMS 27.7(2015):75102.