HELIOS——一个基于极紫外光子高次谐波产生的用于时间分辨光谱学的实验室。

HELIOS--A laboratory based on high-order harmonic generation of extreme ultraviolet photons for time-resolved spectroscopy.

作者信息

Plogmaker S, Terschlüsen J A, Krebs N, Svanqvist M, Forsberg J, Cappel U B, Rubensson J-E, Siegbahn H, Söderström J

机构信息

Department of Physics and Astronomy, Molecular and Condensed Matter Physics, Uppsala University, P.O. Box 516, 75120 Uppsala, Sweden.

出版信息

Rev Sci Instrum. 2015 Dec;86(12):123107. doi: 10.1063/1.4937463.

DOI:10.1063/1.4937463

PMID:26724006

Abstract

In this paper, we present the HELIOS (High Energy Laser Induced Overtone Source) laboratory, an in-house high-order harmonic generation facility which generates extreme ultraviolet (XUV) photon pulses in the range of 15-70 eV with monochromatized XUV pulse lengths below 35 fs. HELIOS is a source for time-resolved pump-probe/two-color spectroscopy in the sub-50 fs range, which can be operated at 5 kHz or 10 kHz. An optical parametric amplifier is available for pump-probe experiments with wavelengths ranging from 240 nm to 20,000 nm. The produced XUV radiation is monochromatized by a grating in the so-called off-plane mount. Together with overall design parameters, first monochromatized spectra are shown with an intensity of 2 ⋅ 10(10) photons/s (at 5 kHz) in the 29th harmonic, after the monochromator. The XUV pulse duration is measured to be <25 fs after monochromatization.

摘要

在本文中，我们介绍了HELIOS（高能激光诱导泛音源）实验室，这是一个内部的高次谐波产生装置，它能产生能量在15 - 70电子伏特范围内的极紫外（XUV）光子脉冲，且单色化后的XUV脉冲长度低于35飞秒。HELIOS是一个用于50飞秒以下时间分辨泵浦 - 探测/双色光谱的光源，可在5千赫兹或10千赫兹下运行。一个光学参量放大器可用于波长范围从240纳米到20000纳米的泵浦 - 探测实验。所产生的XUV辐射通过一个处于所谓离平面安装的光栅进行单色化。连同总体设计参数一起，展示了在单色仪之后第29次谐波处强度为2·10¹⁰个光子/秒（在5千赫兹时）的首个单色化光谱。经测量，单色化后的XUV脉冲持续时间小于25飞秒。