Photoelectric quantum efficiency of niobium for lambda=193 nm and lambda=248 nm

被引：9

作者：

Hand, LN ^{[1
]}

Happek, U ^{[1
]}

机构：

[1] UNIV GEORGIA,DEPT PHYS & ASTRON,ATHENS,GA 30602

来源：

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT | 1996年 / 372卷 / 03期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0168-9002(95)01303-2

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

We report a measurement of the quantum efficiency of a niobium photocathode for the wavelengths lambda = 193 nm and lambda = 248 nm. Charge yields for a 20 ns excimer laser pulse were measured as a function of DC accelerating anode voltage. Our experimental results for the quantum efficiency are epsilon(248) = 3.2+/-0.6 X 10(-6) and epsilon(193) = 4.5+/-0.5 X 10(-4). We conclude that niobium is a promising photocathode material for a superconducting rf electron gun if the laser wavelength is RE200 nm. Laser pulse energy requirements are estimated for such a gun.

引用

页码：335 / 338

页数：4

共 12 条

[1] LASER-DRIVEN METAL PHOTOCATHODES FOR PICOSECOND ELECTRON AND X-RAY PULSE GENERATION [J].