AXAS-A
Analog system with VITUS SDD, reset type low-noise preamplifier and all power supplies in compact housing.
Unique Features
- Detector sizes from 7 mm² to 50 mm²
- Customized finger length available
- Filtering for SDD operating voltages
- Highly integrated design
- SDD operating temperature readout
Spectrum
Figure 1: Typical Fe-55 spectrum of a 20 mm² KETEK VITUS SDD in AXAS-A, taken with XIA Mercury at peaking time of 1 µs.
Throughput
Figure 2: The diagram provides the throughput behavior of the AXAS-A. It shows the dependency of the output count rate with the input count rate for different peaking times. The lower the peaking time, the higher is the maximum throughput for a system. Acquired with XIA Mercury.
Energy Resolution
Figure 3: Energy resolution with input count rate: The energy resolution of the analog system is dependent on the input count rate. The graph shows the dependency of the Full Width at Half Maximum with the incoming photons (input count rate) for different peaking times. Acquired with XIA Mercury.
Figure 4: Peak Position: The graph shows the dependency of the peak position of the Mn-Kα line with the input count rate for different peaking times. Acquired with XIA Mercury.
Connectors
Figure 5: The backplane of the AXAS-A with all available connectors is shown. For the operation a ±12 V power supply is needed. The digital outputs (USB and RS232) are only available for the AXAS-D.
Geometries
Figure 6: All AXAS have compact aluminum housings plated with Nickel. All screws are stainless steel and the systems can be fixed to a plate by using M3 screws. The mounting plates are compatible for all AXAS.
Analog Output Signal
Figure 7: In case of the AXAS-A only the analog output is available. The shape of this output signal (ramped reset type) is shown on the graph. The ramp amplitude is approx. 3 V. The AXAS-A does not contain an additional shaper.
Figure 8: If the detector is exposed to an X-ray radiation small steps are visible in the ramp signal. The height of each step corresponds to the energy of the single photon (one event).
Technical Data
| Operating temperature range | 0 to +50 °C | Signal output | Low noise preamplifier |
|---|---|---|---|
| Storage temperature range | 0 to +50 °C | Signal form | Ramped reset type +1 V to -2 V; 5 mV/keV |
| Temperature monitor | Thermistor | Output connector | LEMO FFS.00.250 |
| Power supply | ±12 VDC; KETEK APS-L power supply 220/110 VAC | Vacuum tightness | Optional; He leakage rate <10-6 mbar · l/s |
Available Options
| CUBE Class |
|||
|---|---|---|---|
| VITUS SDD | Guaranteed FWHM [Mn Kα] @ 1 µs PT | Finger length [mm] | Vacuum-tightness of snout |
| H7 | ≤ 133 eV | 50, 100 (standard), 160, 200 | Yes (optionally) |
| H20 | ≤ 133 eV | 50, 100 (standard), 160, 200 | Yes (optionally) |
| H30 | ≤ 133 eV | 50, 100 (standard), 160, 200 | Yes (optionally) |
| H50 | ≤ 133 eV | 50, 100 (standard), 160, 200 | Yes (optionally) |
| H7LE* | ≤ 133 eV | 50, 100 (standard), 160, 200 | Yes (optionally) |
| H20LE* | ≤ 133 eV | 50, 100 (standard), 160, 200 | Yes (optionally) |
Related Products
EMLCOL
External multilayer collimator to protect the SDD’s entrance window
APS-L
Linear regulated power supply for use with KETEK X-Ray Acquisition Systems
Vacuum Flange
Customized welded vacuum flanges available on request