AXAS-A 2017-04-05T14:59:14+00:00

AXAS-A

Analog system with VITUS SDD, reset type low-noise preamplifier and all power supplies in compact housing.

KETEK AXAS-A

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.

Ketek AXAS-A Spectrum

Ketek AXAS-A Throughput

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.

Ketek AXAS-A Energy Resolution

Ketek AXAS-A Energy Resolution

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.

AXAS-A/D connectors

Ketek AXAS-A Geometries

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.

Ramped reset type analog output signal

Ramp with steps

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 ±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 <10-9 mbar · l/s

Available Options

* with low-energy window
CUBE Class
Premium Class
Standard Class
VITUS SDD Guaranteed FWHM [Mn Kα] @ 1 µs PT Finger length [mm] Vacuum-tightness of snout
H7 ≤ 133 eV ≤ 133 eV ≤ 139 eV 50, 100 (standard), 160, 200 Yes (optionally)
H20 ≤ 133 eV ≤ 133 eV ≤ 139 eV 50, 100 (standard), 160, 200 Yes (optionally)
H30 ≤ 133 eV ≤ 133 eV ≤ 139 eV 50, 100 (standard), 160, 200 Yes (optionally)
H50 ≤ 133 eV ≤ 133 eV ≤ 139 eV 50, 100 (standard), 160, 200 Yes (optionally)
H7LE* ≤ 133 eV ≤ 133 eV ≤ 139 eV 50, 100 (standard), 160, 200 Yes (optionally)
H18LE* ≤ 136 eV ≤ 136 eV ≤ 144 eV 50, 100 (standard), 160, 200 Yes (optionally)