Sapphire-2A Photon Counting MCP-PMT

Photomultiplier tube Sapphire-2A MCP-PMT is designed for the detection and amplification of UV light in 115-360 nm wavelength range and enables operation in photon counting mode.

Structurally, Sapphire-2A MCP-PMT is a metal-glass vacuum unit with an insulating coating, containing a cesium-telluride photocathode on a magnesium fluoride substrate, 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.


Schematic diagram

Basic technical characteristics

Parameter, unit Value
Spectral response range, nm 115–360
Photocathode active area diameter, mm 15
Gain at MCP voltage of 2400 V max 106, min
Single electron pulse height resolution, % 100, max
Peak-to-valley ratio 10, min
Dark count rate density, counts/sec·cm2 5, max
Response pulse duration (FWHM), ns 1.1 max
Anode current pulse rise time, ns 0.8 max