Photomultiplier Tubes Specifications

Help with Photomultiplier Tubes specifications:

Photomultiplier Type

	Your choices are...
	Side-on Photomultiplier		These detectors are more economical than end-on models, have the fastest rise times and are ideal for photometry and spectrophotometry applications. Their vertical configuration takes up less space than the end-on versions. They mount in the standard or pulsed housings. The main disadvantage of these tubes is their non-uniform sensitivity.
	End-on Photomultiplier		Sometimes known as head-on photomultipliers, these detectors offer better spatial uniformity and photosensitive areas from tens of square millimeters to hundreds of square centimeters.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

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Active Area

	Active Area Diameter or Length:		The area of the active part of the detector.  The diameter of the active area if circular, the length of the active area otherwise.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Active Area Height:		If the active area of the detector is not circular, the height of the active area.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

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Photomultiplier Performance

	Spectral Response Range:		The spectral response range of incident light the photomultiplier tube detects, also called wavelength range.
	Search Logic:		User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.
	Sensitivity:		A measure of the effectiveness of a detector in producing an electrical signal at the peak sensitivity wavelength.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Rise Time:		The time necessary for a detector's output to go from 10% to 90% of its final value.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Applied Voltage:		The Anode to Cathode Voltage for the Photomultiplier Tube.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Gain:		The factor by which the current generated by a photon is increased before the signal is detected, also known as current amplification.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

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Photomultiplier Noise

	Dark Current:		The current associated with a detector during operation in the dark with an applied voltage. Increased temperature and applied voltage will result in increased dark current. Also, larger active areas will generally have a higher dark current.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.
	Noise Equivalent Power (NEP):		The power of incident light, at a specific wavelength, required to produce a signal on the detector that is equal to the noise.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

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