The PMA detector is a single photon sensitive, fully integrated, fast time response and low noise photon sensor.
PMA Series
Photomultiplier Detector Assembly
The PMA detector is a single photon sensitive, fully integrated, fast time response and low noise photon sensor. The PMA integrates a fast Photomultiplier Tube (PMT), a high voltage power supply and a pre-amplifier. Thermoelectric cooling and automatic overload protection are available as an option.
Housing with dedicated RF and magnetic shielding
These devices are built in an iron or nickel coated aluminum housing with titanium nitride or gold refinement to achieve high level of RF and magnetic shielding and protection against the interference with other devices. The built in pre-amplifier is specially targeted at timing sensitive applications such as Time-Correlated Single Photon Counting (TCSPC). Signal output for all models is a standard 50 Ohms SMA connector.
Spectral ranges between 230 nm and 920 nm
Various photocathodes can be incorporated into the PMA to meet the user’s needs. Two different cathode versions are available. A blue sensitive, low dark count version with very high quantum efficiency up to 40% covers the spectral range from 230 nm to 700 nm. An extended red sensitive cathode covers the 230 nm to 920 nm range with a quantum efficiency up to 20%. A thermoelectrically cooled housing is available to reduce the dark count rate (recommended for red sensitive versions).
Integrated shutter, overload detection
The housing is available in three different versions. The OEM design contains no safety shutter. Standard PMA-M features a security shutter, which can be interlocked with e.g. a sample chamber lid. Cooled versions (PMA-C Series) incorporate in addition an automatic overload detection function that closes the shutter in case of over-illumination. All modules needs a 12 V DC supply line, which is delivered with the PMA-M and PMA-C versions.
| PMA 175 | PMA 192 | |
|---|---|---|
| Wavelength range | 230 – 700 nm | 230 – 920 nm |
| Dark counts (uncooled model, typ. value)* | < 50 cps | < 10 000 cps** |
| Dark counts (cooled model, typ. value)* | < 50 cps | < 1100 cps** |
| Transit time spread (FWHM, typ. value) | < 180 ps | |
| Recommended max. count rate | 5 MHz | |
| Single electron response width | 1.5 ns | |
| Pulse rise / fall time | 750 ps | |
| Signal Output | ||
| Connector | SMA female | |
| Impedance | 50 Ohms | |
| Polarity | negative | |
| Power Supply | ||
| Input | 12 V DC | |
| Max. current consumption (uncooled) | 200 mA | |
| Max. current consumption (cooled) | 450 mA | |
| Dimensions | ||
| OEM unit | 134 × 84 × 34 mm (w × d × h) | |
| PMA (uncooled) | 72 × 84 × 84 mm (w × d × h) | |
| PMA-C (cooled) | 120 × 84 × 110 mm (w × d × h) | |
| Detector active area | 8 mm | |
* at 20°C ambient temperature
** lower dark counts might be available on special selection. Please contact us for details.
All Information given here is reliable to our best knowledge. However, no responsibility is assumed for possible inaccuracies or omissions. Specifications and external appearances are subject to change without notice.
The single photon sensitive detectors of the PMA Series can be used in various applications, where the large active area, good sensitivity and good timing resolution of the detector are important, such as:
