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.
A photoelectron velocity map imaging spectrometer for experiments combining synchrotron and laser radiations / P., Okeeffe; P., Bolognesi; M., Coreno; A., Moise; R., Richter; Cautero, Giuseppe; L., Stebel; R., Sergo; L., Pravica; Y., Ovcharenko; L., Avaldi. - In: REVIEW OF SCIENTIFIC INSTRUMENTS. - ISSN 0034-6748. - 82:3(2011), pp. 033109-1-033109-8. [10.1063/1.3563723]
A photoelectron velocity map imaging spectrometer for experiments combining synchrotron and laser radiations
CAUTERO, GIUSEPPE;
2011-01-01
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.Pubblicazioni consigliate
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