Theoretical model of the intrinsic emittance of a photocathode

被引：24

作者：

Jensen, Kevin L.

O'Shea, P. G.

Feldman, D. W.

Moody, N. A.

机构：

[1] USN, Res Lab, ESTD, Washington, DC 20375 USA

[2] Univ Maryland, Inst Res Elect & Appl Phys, College Pk, MD 20742 USA

来源：

APPLIED PHYSICS LETTERS | 2006年 / 89卷 / 22期

关键词：

FREE-ELECTRON LASERS;

D O I：

10.1063/1.2387968

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

A theoretical expression for the intrinsic emittance of a photocathode is developed based on a method of evaluating moments of the emission distribution function. The method is first used to reevaluate the well-known rms emittance of a thermionic source, and then, using analogous approximations but with an updated theoretical model of photoemission, an equation for the intrinsic emittance and brightness of a photocathode of comparable simplicity to the thermionic case is obtained in the limit of weak field and low temperature.

引用

页数：3

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