Topaz Photon Counting MCP-PMT

Photomultiplier tube Topaz MCP-PMT is designed for the detection and amplification of visible light in 300-650 nm wavelength range and enables operation in photon counting mode.

Structurally, Topaz MCP-PMT is a metal-glass vacuum unit with an insulating coating, containing a bialkali antimony-potassium-sodium photocathode, a chevron stack of two microchannel plates, and a metal anode.

The electrons are focused from the photocathode to the MCP input by the electrostatic lens field.

It can be used as a Cherenkov detector. Since PMT is thermally stable up to 150 °C, it can be used in devices operating under high climatic loads.


Basic technical characteristics
Parameter, unitValue
Spectral response range, nm300–650
Integral sensitivity, μA/lm35, min
Photocathode active area diameter, mm17
Gain at MCP voltage of 2400 V max106, min
Single electron pulse height resolution, %110, max
Dark count rate density, counts/sec·cm240, max
Peak-to-valley ratio10, min
Response pulse duration (FWHM), ns1.2 max
Anode current pulse rise time, ns0.8 max