- MCP and FOP based devices
- PMT Sapphire-2A based on MCP
Photon counting photomultiplier tube (PMT) Sapphire-2A based on MCP
A photon counting photomultiplier tube (PMT) Sapphire-2A based on MCP for operation in the UV in the spectral range 115-360 nm. In terms of construction MCP-PMT Sapphire-2A is a glass-to-metal vacuum unit with a cesium-telluride photocathode deposited on a magnesium fluoride substrate, a shevron stack of two microchannel plates and a metal anode. Electrons from the photocathode are focused on the MCP input by electrostatic lens field.
PMT's view
Dimensional outlines
Sapphire-2A PMT spectral sensitivity
| Main technical data | ||
Parameter |
Dimension |
Value |
| Spectral response range | nm | 115 - 360 |
| Spectral response at λ=250 nm | mА/W | 20 min. |
| Photocathode active area diameter | mm | 15 |
| Single-electron amplitude resolution | % | 100 max. |
| Peak-to-Valley ratio | - | 10 min. |
| Gain at MCP voltage 2400 V max | - | 106 max. |
| Dark pulses counting rate density | sec-1cm-2 | 5 max. |
| Response duration (FWHM) | nsec | 1.1 max. |
| Anode current pulse rise time | nsec | 0.8 max. |
| Weight | g | 50 max. |
Single electron pulse height distribution
Sapphire-2A PMT counting characteristic
