CHARACTERISTICS OF A TA PHOTOCATHODE FOR THE GENERATION OF PICOSECOND X-RAY PULSES

被引：13

作者：

VANWONTERGHEM, B

RENTZEPIS, PM

机构：

来源：

APPLIED PHYSICS LETTERS | 1990年 / 56卷 / 11期

关键词：

D O I：

10.1063/1.102599

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The properties of laser-driven tantalum photocathodes as an electron emitter for the creation of ultrashort electron bunches and x-ray pulses are discussed. Despite the smaller quantum efficiency of metals, their inertness, damage threshold, and lifetime compare favorably with semiconductor photocathodes. Using the fourth harmonic of a Nd:YAG laser, currents of over 3 nC per pulse have been achieved which produced x-ray pulses with a brightness of 6.2×106 Cu Kα x-ray photons cm-2 sr-1 and a duration of 70 ps, as determined by an x-ray streak camera.

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页码：1005 / 1007

页数：3

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