The FMB Oxford APD detector is an ultra-fast detector system using an avalanche photodiode, for X-ray scattering experiments up to 20keV.
It offers the ultimate in speed, resolution, efficiency and noise levels whilst maintaining a robust and easy to use architecture; making it ideal for experiments with a large dynamic range, time resolved measurements and fast photon counting.
The system requires an APD detector head, signal processing electronics and a signal cable. This section details the APD detector head and the two processing modules offered by FMB Oxford.
The FMB Oxford APD Detector Head comes in three standard formats, 5×5 rectangular body, 5×5 cylindrical body and a 10×10 transmissive version all with integrated preamplifier, in the housing.
[/vc_column_text]| APD0001 | APD0005 | APD0007 | APD0008 | |
|---|---|---|---|---|
 |  |  |  |
|
| 5 x 5 mm | 10 x 10 mm | 5 x 5 mm | 10 x 10 mm | |
| 110μm | 110μm | 110μm | 200μm | |
| 70μm Kapton | 70μm Kapton | 70μm Kapton | 70μm Kapton |
| Maximum count rate | 100MHz * |
| Diode area | 5mm x 5mm |
| Window | 70μm Kapton |
| Housing dimensions | 26mm x 20.85mm x 55mm (L) |
| Photon efficiency | 50% that of NaI up to 10keV * |
| Noise | below 1Hz * |
| Diode gain | 200x at 370V bias |
| Preamplifier gain | 60dB per stage at 100MHz |
| Rise time 10%-90% | <2ns * |
| FWHM | <4ns * |
| *indicative performance figures obtained at the National Synchrotron Light Source, Brookhaven National Laboratory |
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