The acetone bandpass detector for inverse photoemission: operation in proportional and Geiger–Müller modes. (26th April 2018)

• Record Type: Journal Article
• Authors: Thiede, Christian; Niehues, Iris; Schmidt, Anke B; Donath, Markus
• Is Part Of: Measurement science & technology. Volume 29:Number 6(2018:Jun.)
• Publication Date: 2018-04-26
• Subjects: inverse photoemission -- acetone bandpass photon detector -- VUV photon counting; Physical measurements -- Periodicals; Scientific apparatus and instruments -- Periodicals; Equipment and Supplies -- Periodicals; Science -- instrumentation -- Periodicals; Technology -- instrumentation -- Periodicals; Mesures physiques -- Périodiques; Physical measurements; Scientific apparatus and instruments; Periodicals; 502.87
• DOI: 10.1088/1361-6501/aab941
• Languages: English
• ISSNs: 0957-0233

Abstract

Abstract: Inverse photoemission is the most versatile experimental tool to study the unoccupied electronic structure at surfaces of solids. Typically, the experiments are performed in the isochromat mode with bandpass photon detectors. For gas-filled counters, the bandpass behavior is realized by the combination of the photoionization threshold of the counting gas as the high-pass filter and the ultraviolet transmission cutoff of an alkaline earth fluoride entrance window as the low-pass filter. The transmission characteristics of the entrance window determine the optical bandpass. The performance of the counter depends on the composition of the detection gas and the fill-gas pressure, the readout electronics and the counter geometry. For the well-known combination of acetone and CaF2, the detector can be operated in proportional and Geiger–Müller modes. In this work, we review aspects concerning the working principles, the counter construction and the read-out electronics. We identify optimum working parameters and provide a step-by-step recipe how to build, install and operate the device.