Products | AXAS-A

Analytical X-Ray
Acquisition Systems - Analog

Short Facts

highly integrated design
KETEK reset type preamplifier
filtering for SDD operating voltages
SDD operating temperature readout
VITUS SDD sizes (7 – 30 mm²) available
adaptable finger length
optional Shaping Amplifier
from 0.25 to 6µs analog shaping time
optional ADC/MCA plus KETEK Acquisition Software (Windows XP)

Complete Analog Detector System

Performance

Throughput: The diagram provides the throughput behaviour of the AXAS-A. It shows the dependency of the output count rate with the input count rate for different analogue shaping times. The lower the shaping time, the higher is the maximum throughput for a system.

Energy Resolution with Input Count Rate: The energy resolution of the analogue 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 analogue shaping times.

Peak Position: The graph shows the dependency of the peak position of the Mn-Ka line with the input count rate for different analogue shaping times.

AXAS-A output versus input count rate

Sample Spectrum

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Typical spectrum of a 7mm² KETEK VITUS SDD in AXAS-A, taken with KETEK Shaper and ADC/MCA at 6µs shaping time.

Block Diagram

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The AXAS-A has basically two outputs: Preamplifier Output and Shaping Amplifier Output. The Preamplifier Output can be used to connect any external pulse processing system. The Shaping Amplifier Output provides an output signal between 0 and +5V and can therefore be used as an input signal to the KETEK ADC/MCA or any other standard ADC/MCA. The ADC/MCA is then connected via USB to a host PC.

AXAS-A Connection Diagram

AXAS-A Pin Assignment

15-pole Sub-D Connector (see table)
exponential decay preamplifier output
shaping amplifier semi-gaussian output
pulser test input
temperature monitor output in Kelvin/100 [V]
2.73 V → 273 K
power indicator LED for ±12 V

AXAS Pin Assignment
1	2	3	4	5
PUR	PUR	GND	GND	GND

AXAS Pin Assignment
6	7	8	9	10
+12V	GND	GND	GND	-12V

AXAS Pin Assignment
11	12	13	14	15
SCK*	SDO*	SOT*	ALD*	L5318*

* for KETEK ADC/MCA hand-shaking

Geometries

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All AXAS have compact aluminium 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.