Sapphire-2AM MCP-PMT with a built-in voltage divider is designed for the detection and amplification of optical signals in the UV spectrum and provides operation in photon counting mode.
PMT vacuum unit has a cesium-telluride photocathode, a chevron stack of two MCPs, and a metal anode. Its construction parts form an immersion lens that focuses photoelectrons to the first MCP input.
A resistive voltage divider is mounted on the vacuum unit, providing the necessary PMT electrode potentials.
The entire device is housed and sealed with a compound. Attached to the output end of the envelope is a 50-Ohm SMA output connector and a high voltage SHV connector for the power supply.
Specification
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 3300 V max | 106, min |
| Single electron pulse height resolution, % | 110, max |
| Peak-to-valley ratio | 10, min |
| Dark count rate density, counts/sec·cm2 | 10, max |
| Response pulse duration (FWHM), ns | 1.2 max |
| Anode current pulse rise time, ns | 0.8 max |