用于宽带太赫兹光谱学的相干同步辐射

Coherent synchrotron radiation for broadband terahertz spectroscopy.

作者信息

Barros J, Evain C, Manceron L, Brubach J-B, Tordeux M-A, Brunelle P, Nadolski L, Loulergue A, Couprie M-E, Bielawski S, Szwaj C, Roy P

机构信息

Synchrotron SOLEIL, Saint Aubin, BP 48, 91192 Gif-sur-Yvette, Cedex, France.

出版信息

Rev Sci Instrum. 2013 Mar;84(3):033102. doi: 10.1063/1.4793558.

DOI:10.1063/1.4793558

PMID:23556802

Abstract

We present the first high resolution (10(-3) cm(-1)) interferometric measurements in the 200-750 GHz range using coherent synchrotron radiation, achieved with a low momentum compaction factor. The effect of microbunching on spectra is shown, depending on the bunch current. A high signal-to-noise ratio is reached thanks to an artifact correction system based on a double detection scheme. Combined to the broad emitted spectral range and high flux (up to 10(5) times the incoherent radiation), this study demonstrates that coherent synchrotron radiation can now be used for stability-demanding applications, such as gas-phase studies of unstable molecules.

摘要

我们展示了在200 - 750吉赫兹范围内使用相干同步辐射进行的首次高分辨率（10⁻³厘米⁻¹）干涉测量，这是通过低动量压缩因子实现的。展示了微聚束对光谱的影响，该影响取决于束流。由于基于双检测方案的伪像校正系统，实现了高信噪比。结合宽发射光谱范围和高通量（高达非相干辐射的10⁵倍），这项研究表明相干同步辐射现在可用于对稳定性要求较高的应用，例如不稳定分子的气相研究。