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About Photomultiplier Tubes
Photomultiplier tubes consist of an evacuated envelope with a photocathode that emits electrons when exposed to light. These electrons are accelerated by a positive electrostatic field and fall upon a metal surface where they emit secondary electrons that are again accelerated to generate more electrons at the next metal surface, and so on. The whole arrangement thus acts as a combination of a simple photocell with a high-gain amplifier in a self-contained unit. Photomultiplier tubes are used in applications where rapid detection of light or low light detection is necessary.
There are two main types of photomultiplier tubes, side-on photomultipliers and end-on Photomultipliers. Side-on detectors are more economical than end-on models, and have the faster rise times. They are ideal for photometry and spectrophotometry applications. Their vertical configuration takes up less space than the end-on versions and they mount in standard or pulsed housings. The main disadvantage of these photomultiplier tubes is their nonuniform sensitivity. End-on photomultiplier tubes, sometimes known as head-on photomultipliers, offer better spatial uniformity and photosensitive areas from tens of square millimeters to hundreds of square centimeters.
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Engineering Web: Photomultiplier Tubes
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Part Numbers for Photomultiplier Tubes
| Part # | Distributor | Manufacturer | Product Category | Description |
|---|---|---|---|---|
| 931A | PLC Radwell | BURLE TUBE PRODUCTS | Not Provided | TUBE PHOTOMULTIPLIER 9 STAGE SIDE WINDOW TYPE |
| 7696 | PLC Radwell | HAMAMATSU | Not Provided | PHOTOMULTIPLIER TUBE |
| R212 | Amazon | American Microsemiconductor | BISS | R212 |
| R878 | PLC Radwell | HAMAMATSU | Not Provided | PHOTOMULTIPLIER TUBE 1250V 51MM |
