AXAS 3.0

The new AXAS 3.0 is a complete spectroscopic system for VITUS SDDs in a very compact housing. It includes all power supplies, the latest generation preamplifier, a high precision temperature controller and in the digital system KETEK‘s proprietary digital pulse processor DPP3. The AXAS 3.0 is available with all sizes of VITUS SDDs from H7 to H50 and different lengths of the vacuum tight finger.

AXAS 3.0

ARRAY 3.0

AXAS 3.0

Complete system for VITUS modules H7 to H50

Unique Features

KETEK‘s new high-performance digital pulse processor DPP3 with peaking time down to 25 ns
Latest Generation 3.0 Preamp technology
Ethernet and USB 2.0 Type C interface
Guaranteed: FWHM < 133 eV @ 1 µs peaking time for Mn-K_α-line
Both Graphene window types available
Extremely small form factor: 81 × 61 × 36 mm³ (AXAS body only)
Single supply voltage: + 12 VDC / 250 mA typ
DLLs for Windows and libraries for LINUX, ARM based machines supported
Four M3 screws for easy mounting in customer system
Finger configuration compatible with current AXAS 2.0

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Available Options

Specifications

First amplification stage	KETEK CSA
Energy resolution (@ Mn-K_α, -35 °C chip temperature and 1 µs peaking time)	≤ 133 eV
Peak to background	> 15,000
Peak to tail	> 2,000
Peak shift stability up to 100 kcps	< 1 eV
Max. input countrate	2,000 kcps
Graphene CH window Graphene CL window	1 µm Carbon 165 nm Carbon
Cooling performance at +20 °C heat sink temperature	∆T > 85 K

Spectrum

The spectrum has been acquired in KETEK’s standard end qualification test stand with an Fe-55 source. The input count rate has been 50 kcps at a peaking time of 1 µs and a SDD chip temperature of -35 °C. The spectrum shows an excellent peak-to-background ratio and energy resolution for Mn-Kα.

Energy Resolution

This plot shows the energy resolution for Mn-Kα measured with a AXAS-D 3.0 with a VITUS H50 CH at two different SDD chip temperatures. The included KETEK DPP3 allows peaking times down to 25 ns. The best set of parameters depend on the application optimizing either the energy resolution or the achievable through put.

Throughput

The graph shows the throughput curves of the KETEK DPP3 and the concerning energy resolution for Mn-Kα measured with a VITUS H20 SDD at different peaking times between 25 ns and 2 µs. The standard parameters are optimized for high energy resolution (gap time = 300 ns). The parameters for optimized throughput use a shorter gap time (gap time = 100 ns).

Technical Data

Parameter	Specification	Note
Dimensions	81 x 61 x 36 mm³
Weight	0.58 kg ± 0.01 kg	with 100 mm finger length
Operating Temperature Range	0 °C to +50 °C
Storage Temperature Range	-20 °C to +50 °C
Operating Humidity Range	5 to 80 %	non-condensing
SDD temperature monitor	Digital temperature read-out
Vacuum tightness	He leakage rate < 10^-9 mbar · l/s
DC Input Voltage	+12 V ± 10 %
DC Input Current	+1000 mA max.	Typical at -35 °C chip temperature and +20 °C heat sink temperature: +300 mA
DPP3 software	Acquisition software (VICOScope), update tool (VICOUpdate) and comprehensive programming library (VICOLib) available for Windows and Linux
Preamplifier
Preamp Gain	5 mV/keV ± 20 %
Reset Time	< 500 ns	90-10 % fall time without under- or overshoot @ -35 °C, no X-rays: typical 1 µs
Ramp Direction	Positive
Ramp Size	Top: +1.0 V typ. Bottom: -1.0 V typ.
DPP3
Digital Interfaces	100 Mbit/s Ethernet USB 2.0 SPI
Number of Bins	max. 8192
Bin Depth	8 to 24 bit
ADC	16 bit
Clock Frequenzy	80 MHz
Peaking Time Range	25 ns – 12.6 µs
Max. Read-out Speed	0.69 ms (512 Bins, 2 Bytes/Bin)	Recommended 0.75 ms

Connectors

Connector	Notes
USB Output	USB 2.0 Type C
DC Input	Standard DC Jack: inner diameter 2.1 mm, outside diameter 5.5 mm, inner contact is “+“
Ethernet	RJ45, 100 Mbit/s
Busy-Out	MCX jack (female), digital output 0…3.3 V
Trigger-In	MCX jack (female), digital input 0…3.3 V