51mm Photomultiplier Tube 9879B with S20 Photocathode
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since 2014
Description
The 9879B Photomultiplier Tube is a high-performance device designed for precision applications requiring sensitive detection of low-light signals. This 51mm (2”) diameter photomultiplier features an S20 infra-red sensitive photocathode mounted on a sandblasted borosilicate window, which enhances cathode sensitivity. The tube is equipped with 12 beryllium copper (BeCu) dynodes arranged in a linear focused design, ensuring excellent linearity and timing characteristics.
With a spectral range of 290 to 870 nm, the 9879B is optimized for detecting light across a broad spectrum, where its quantum efficiency exceeds 1% of the peak value. This makes it ideal for applications requiring high sensitivity and precise measurement, such as film scanning and pollution monitoring. The photomultiplier's construction enables high pulsed linearity and low afterpulsing, ensuring reliable and consistent performance in demanding environments.
The device is characterized by its robust design, which includes a nominal anode sensitivity of 500 A/lm and a maximum rated anode sensitivity of 2000 A/lm. It operates efficiently with an overall voltage of 1750 to 2200 V for nominal sensitivity, and up to 2000 V for maximum rated sensitivity. The 9879B also features a low dark current and dark count rate, which are critical for maintaining accuracy in low-light conditions. With a weight of just 130g, this photomultiplier is a versatile component suitable for integration into various scientific and industrial systems.
51mm Photomultiplier Tube 9879B with S20 Photocathode
Specifications |
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|---|---|
| PMT Type: | PMT (photomutiplier tube) |
| Wavelength Of Max Response: | 350 nm |
| Wavelength Range: | 290 – 870 nm |
| Rise Time: | 2 ns |
| Active Diameter: | 46 mm |
| Quantum Efficiency At Peak: | 21 % |
| Weight: | 130 g |
| Temperature: | 80 ºC |
| Max Rated V(k-a): | 2800 V |
Features
- High Sensitivity and Linearity: The 9879B photomultiplier features an S20 infra-red sensitive photocathode on a sandblasted window, enhancing cathode sensitivity. It includes 12 BeCu dynodes of linear focused design for excellent linearity and timing.
- Wide Spectral Range: Spectral range from 290 nm to 870 nm, with a quantum efficiency exceeding 1% of peak.
- Applications: Ideal for film scanners, pollution monitoring, and other applications requiring high pulsed linearity and low afterpulsing.
- Photocathode: S20 with an active diameter of 46 mm and a quantum efficiency at peak of 21%.
- Anode Sensitivity: Nominal anode sensitivity of 500 A/lm, with a maximum rated sensitivity of 2000 A/lm.
- Dark Current: At 20 ºC, the dark current is 10-100 nA at nominal A/lm, and 40 nA at max. rated A/lm.
- Magnetic Field Sensitivity: The most sensitive direction is 1 x 10-4 T.
- Timing Characteristics: Single electron rise time of 2 ns, FWHM of 3 ns, and jitter (FWHM) of 2.2 ns.
- Compact and Lightweight: Weighs only 130 g.
- Robust Design: Maximum ratings include an anode current of 100 µA and cathode current of 1000 nA, with a temperature range up to 80 ºC.
Applications
- Film Scanners
- Pollution Monitoring
- High Pulsed Linearity
- Low Afterpulsing
Frequently Asked Questions
The 9879B is a 51mm (2”) diameter end window photomultiplier.
The spectral range of the Photomultiplier Tube is 290 - 870 nm.
The Photomultiplier Tube is suitable for film scanners and pollution monitoring.
Voltage dividers and magnetic shields are available for the Photomultiplier Tube.
The weight of the Photomultiplier Tube is 130g.