The detector with a voltage divider on the printed circuit board is designed for the detection of charged particle fluxes as part of a mass spectrometer.
The board on which the MCP detector is mounted consists of a detector voltage divider, components of the power supply circuit and a coaxial connector for the signal readout. The assembly of the detector on the board allows to reduce the influence of spurious inductances, and as a result, the output pulse of the MCP detector acquires a classical waveform without “ripple” with improved timing characteristics. The compact design with 2 pins for the power supply and a coaxial connector for the signal acquisition is more appropriate to the application and provides easy installation and replacement of the detector when needed.
Specification
Basic parameters
| Parameter, unit | Value | |
|---|---|---|
| min | max | |
| MCP active area diameter, mm | 25 | |
| Supply voltage at 1×107 gain, V | 2400 | |
| Single electron pulse height resolution, % | 135 | |
| Dark count rate density, count/sec×cm2 | 3 | |
| Average pulse width (FWHM), ns | 1.6 | |
| Pulse leading edge rise time, ns | 0.75 | |
| Product consumption current at supply voltage, μA | 250 | |
Typical output waveform
The detector electrical connection diagram
R1 = 10 MΩ;
R2 = R3 = 1 MΩ;
С1 = С2 = 470 pF;
Usupply = -2.4 kV, max
1 – control electrode;
2 – MCP unit;
3 – anode
General view, overall, setting and mounting dimensions of MCP detector with 25 mm active area diameter
| Lead designation | |
|---|---|
| 1 | Supply voltage –2400 V, max |
| 2. 3 | Package |
| SMA | Signal output |
| А | Anode |