A resonance ionization imaging detector based on cesium atomic vapor

Dual-Wavelength Time-Resolved Resonance Ionization Imaging with Cesium and Mercury Vapors

“…The configuration and detailed principle of operation of the RIID are described elsewhere. [1][2][3][4] Briefly, the detector, consisting of a partially metal coated input window and a microchannel plate coupled with a P20 phosphor screen, was assembled in a six-way cross-vacuum chamber. The chamber was evacuated to a pressure of ϳ1 torr.…”

“…1 An RIID based on Hg vapor was first described by Matveev et al 2 and subsequently optimized by Pappas et al 3 Recently, another RIID using Cs as an active element was successfully demonstrated and its operational characteristics were evaluated. 4 The present note, as a continuation of the RIID development, describes a detector with two active elements (Cs and Hg), which exhibits dual-wavelength detection capability. A unique excitation/ionization scheme, based on ultraviolet (254 nm) and near-infrared (852 nm) resonance excitation, was devised and is discussed here.…”

Atomic spectrometry update. Advances in atomic emission, absorption and fluorescence spectrometry, and related techniques

“…A novel resonance ionisation imaging detector based on caesium atomic vapour has been described. 231 The detector is capable of two-dimensional imaging with resolution determined by the Doppler-broadened atomic linewidth of Cs. The most efficient ionisation scheme was shown to include a three-step excitation/ionisation ladder: however, the imaging capabilities of the detector were evaluated with a two-step scheme.…”