Demonstration of a 17-GHz, high-gradient accelerator with a photonic-band-gap structure

被引：98

作者：

Smirnova, EI ^{[1
]}

Kesar, AS ^{[1
]}

Mastovsky, I ^{[1
]}

Shapiro, MA ^{[1
]}

Temkin, RJ ^{[1
]}

机构：

[1] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.95.074801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the testing of a high gradient electron accelerator with a photonic-band-gap (PBG) structure. The photonic-band-gap structure confines a fundamental TM01-like accelerating mode, but does not support higher-order modes (HOM). The absence of HOM is a major advantage of the PBG accelerator, since it suppresses dangerous beam instabilities caused by wakefields. The PBG structure was designed as a triangular lattice of metal rods with a missing central rod forming a defect confining the TM01-like mode and allowing the electron beam to propagate along the axis. The design frequency of the six-cell structure was 17.14 GHz. The PBG structure was excited by 2 MW, 100 ns pulses. A 16.5 MeV electron beam was transmitted through the PBG accelerator. The observed electron beam energy gain of 1.4 MeV corresponds to an accelerating gradient of 35 MV/m, in excellent agreement with theory.

引用

页数：4

共 24 条

[1] MEASUREMENT OF WAKE-FIELD SUPPRESSION IN A DETUNED X-BAND ACCELERATOR STRUCTURE [J].