ERROR FIELD MEASUREMENT AND ANALYSIS FOR A PURE PERMANENT-MAGNET FEL WIGGLER

被引：2

作者：

GOODMAN, DL ^{[1
]}

SHEFER, RE ^{[1
]}

HALBACH, K ^{[1
]}

机构：

[1] UNIV CALIF BERKELEY,LAWRENCE BERKELEY LAB,BERKELEY,CA 94708

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1992年 / 318卷 / 1-3期

关键词：

D O I：

10.1016/0168-9002(92)91168-9

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A two meter long pure permanent magnet FEL wiggler with a 4 cm period and a 2.4 kG field on-axis has been fabricated and tested for the random field error parameters which are relevant to high gain FEL performance. The wiggler is part of a submillimeter-wave alpha particle Thomson scattering diagnostic for fusion plasmas. The integrated magnetic field along the electron beam trajectory was measured for each individual wiggler magnet. The magnets were sorted into a configuration which minimizes the random field-error-induced electron beam steering and displacement. A description of the magnetic field error requirements for the FEL, the error field measurement technique, measurement results and magnet sorting algorithms are presented. After sorting, a measured rms field error of less than 0.5% was obtained.

引用

页码：825 / 829

页数：5

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