Simultaneous resolution of spectral and temporal properties of UV and visible fluorescence using single-photon counting with a position-sensitive detector

Lisa A. Kelly, John G. Trunk, Krzysztof Polewski, John C. Sutherland

Research output: Contribution to journalArticle

21 Scopus citations

Abstract

A new fluorescence spectrometer has been assembled at the U9B beamline of the National Synchrotron Light Source to allow simultaneous multiwavelength and time-resolved fluorescence detection, as well as spatial imaging of the sample fluorescence. The spectrometer employs monochromatized, tunable UV and visible excitation light from a synchrotron bending magnet and an imaging spectrograph equipped with a single-photon sensitive emission detector. The detector is comprised of microchannel plates in series, with a resistive anode for encoding the position of the photon-derived current. The centroid position of the photon-induced electron cascade is derived in a position analyzer from the four signals measured at the corners of the resistive anode. Spectral information is obtained by dispersing the fluorescence spectrum across one dimension of the detector photocathode. Timing information is obtained by monitoring the voltage divider circuit at the last MCP detector. The signal from the MCP is used as a ''start'' signal to perform a time-correlated single photon counting experiment. The analog signal representing the position, and hence wavelength, is digitized concomitantly with the start/stop time difference and stored in the two-dimensional histogramming memory of a multiparameter analyzer.

Original languageEnglish (US)
Pages (from-to)1496-1498
Number of pages3
JournalReview of Scientific Instruments
Volume66
Issue number2
DOIs
StatePublished - Dec 1 1995
Externally publishedYes

ASJC Scopus subject areas

  • Instrumentation
  • Physics and Astronomy (miscellaneous)

Fingerprint Dive into the research topics of 'Simultaneous resolution of spectral and temporal properties of UV and visible fluorescence using single-photon counting with a position-sensitive detector'. Together they form a unique fingerprint.

  • Cite this