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Charge Transfer Device Detectors for Analytical Optical Spectroscopy - Operations and Characteristics.
ARIZONA UNIV TUCSON DEPT OF CHEMISTRY
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This article is the first in a two part series describing the operation, characteristics and application of a new class of solid -state multichannel UV-visible detectors. In this manuscript, Charge Transfer Devices CTDs are described. Detector characteristics pertinent to spectroscopic application including quantum efficiency, read noise, dark count rate and available formats are emphasized. Unique capabilities such as the ability to non-destructively read out the detector array, and the ability to alter the effective detector element size by a process called binning are described. CTDs with peak quantum efficiencies over 80 and significant responsivity over the wavelength range of 0.1nm to 1100nm are discussed. Exceptionally low dark count rates which allow integration times up to many hours and read noises more than two orders of magnitude lower than commercially available PDA detectors both contribute to the outstanding performance offered by these detectors. Keywords Spectroscopic detectors Charge transfer devices Charge coupled device Charge injection device OPtical spectroscopy.
APPROVED FOR PUBLIC RELEASE