Detector sytem 9910
The unit is designed to count X-rays in laboratory or production equipment and in synchrotron radiation experiments.
The 9910 is a wide dynamic range, X-ray counting system. X-rays up to 100 keV are detected using a scintillator coupled to a photomultiplier and signal processing electronics to provide a TTL output.
The detector uses a window discriminator to detect X-rays within a selected energy band. The width and threshold (lower limit) of the window and the HV of the photomultiplier can be set by the user with the 9910-CONTROL.
Fast count rates are achieved by using a YAP(Ce) scintillator, selected for its very fast (30ns) decay time, and high speed electronics, designed to minimise dead-time.
As well as counting X-rays in a set energy band, the unit can be used to generate an energy spectrum by using a narrow (energy) window and progressively increasing the lower threshold. This feature is also used to calibrate the detector, using Gamma and X-ray sources of known energy.
Technical data:
| Scintillator: | Yttrium Aluminium Perovskit |
| (Cer dotiert) - YAlO3(Ce) | |
| Detection range: | 5 to 100 keV |
| Lower window discriminator: | 100 mV |
| Max. window width: | 3 V |
| Max. count rate: | 5 MHz (indicated counts) |
| 10 MHz (actual counts) | |
| Background counts: | 0.15 Hz |
| Supply voltage: | 4.75 to 5.75 V |
| Supply current: | 80 mA at 1 MHz count rate |
