Experimental study of coaxial free-electron maser based on two-dimensional distributed feedback

被引：59

作者：

Konoplev, IV ^{[1
]}

McGrane, P ^{[1
]}

He, W ^{[1
]}

Cross, AW ^{[1
]}

Phelps, ADR ^{[1
]}

Whyte, CG ^{[1
]}

Ronald, K ^{[1
]}

Robertson, CW ^{[1
]}

机构：

[1] Univ Strathclyde, Dept Phys, SUPA, Glasgow G4 0NG, Lanark, Scotland

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 03期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.96.035002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The first experimental study of a coaxial free-electron maser (FEM) based on two-dimensional (2D) distributed feedback is presented. A new type of cavity formed with coaxial 2D surface photonic band gap structures was used. The FEM was driven by a large diameter (7 cm), high-current (500 A), annular electron beam of energy 475 keV. By tuning the amplitude of the undulator or guide magnetic field, modes associated with the different band gaps of the 2D structures were excited. The Ka-band coaxial FEM generated 15 MW of radiation with a 6% conversion efficiency, in excellent agreement with theory.

引用

页数：4

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