Photomultipliers
Critical Parameters
| Parameter | Description | Typical Value (Fast PTM) |
|---|---|---|
| Rise Time (TR) | The time interval between the arrival of photon at the cathode and the arrival of the amplified pulse at the anode | 0,05 (MCP) to 3 ns |
| Transit Time (TT) | The time interval between the arrival of photon at the cathode and the arrival of the amplified pulse at the anode | MCP:0,5 ns. PMT: 5-30 ns |
| Transit Time Spread (TTS) | Considered as the most important specification for time-resolved measurements; the timing variation due to the different geometric paths that the electrons can take from the cathode to the anode | MCP: 0,025 ns. PMT: 0,2-1,5 ns |
Overview of different PMT's
| Part ID | Type | Driving Voltage | Gain | Spectral Range (nm) | Spectral Peak (nm) | Dark Current (after 30 min) | Rise Time (ns) | Transit Time (TT)(ns) | Transit Time Spread (TTS) (ns) |
|---|---|---|---|---|---|---|---|---|---|
| R1161 | PMT - Head On | 1000 V | 1,0E+06 | 300 to 650 | 420 | 1-6 nA | 2,5 | 27 | 2,8 |
| R5505 | PMT - Head On | 1750 V | 1,0E+06 | 300 to 1400 | 900 | 10 nA | 3 | 23 | 1,5 |