一种用于同步加速器和激光辐射联合实验的光电子速度映射成像光谱仪。

A photoelectron velocity map imaging spectrometer for experiments combining synchrotron and laser radiations.

作者信息

O'Keeffe P, Bolognesi P, Coreno M, Moise A, Richter R, Cautero G, Stebel L, Sergo R, Pravica L, Ovcharenko Y, Avaldi L

机构信息

CNR-IMIP, Area della Ricerca di Roma 1, Monterotondo Scalo, Italy.

出版信息

Rev Sci Instrum. 2011 Mar;82(3):033109. doi: 10.1063/1.3563723.

DOI:10.1063/1.3563723

PMID:21456720

Abstract

A velocity map imaging/ion time-of-flight spectrometer designed specifically for pump-probe experiments combining synchrotron and laser radiations is described. The in-house built delay line detector can be used in two modes: the high spatial resolution mode and the coincidence mode. In the high spatial resolution mode a kinetic energy resolution of 6% has been achieved. The coincidence mode can be used to improve signal-to-noise ratio for the pump-probe experiments either by using a gate to count electrons only when the laser is present or by recording coincidences with the ion formed in the ionization process.

摘要

本文描述了一种专门为结合同步辐射和激光辐射的泵浦-探测实验设计的速度映射成像/离子飞行时间光谱仪。内部构建的延迟线探测器可用于两种模式：高空间分辨率模式和符合模式。在高空间分辨率模式下，已实现6%的动能分辨率。符合模式可用于通过以下方式提高泵浦-探测实验的信噪比：要么使用门控仅在激光存在时对电子进行计数，要么记录与电离过程中形成的离子的符合事件。