Large Area 7-Channel Silicon Drift Detector Array.
Complete XRF multi-channel system including 7 fast CUBE SDDs, ultra-low-noise preamplifiers, 7 high performance digital pulse processors with USB2.0 interface, external control unit with all power supplies and cooling station.
7 x 80 mm² = 560 mm² collimated area
FWHM < 139 eV @ 1 μs peaking time for Mn Kα-line
(typ. < 132 eV)
Optimized for high input count rates up to 1 Mcps per channel and short peaking times down to 0.1 μs
Up to 7 Mcps detection rate of the full system
X-ray detection energy range from 1.5 keV to > 30 keV
Figure 1: Fe-55 spectrum of the VA560 of a) single channel with other channels switched off (grey) b) single channel with all channels switched on (purple). There is no crosstalk between the channels.
SDD Modules and Detector Head
New slim-line SDD modules with fast CUBE ASIC readout
Detector thickness: 450 μm
Each SDD equipped with an individual multilayer collimator (no spectral contamination)
Radiation Entrance Window
Large entrance window (45 mm diameter) made of 7.5 μm polyimide with 200 nm Al coating
Ceramics support grid for minimal spectral contamination
Transmittance comparable to 25 μm thick Beryllium window
Entrance Window Transmission
Figure 2: X-ray transmittance of the Al-coated polyimide window as a function of the photon energy, compared to 25 μm Beryllium.
External Control Unit
Individual preamp, power supply, and KETEK DPP2 for each channel
No crosstalk between the single channels
Rack contains system main switch and temperature and pressure monitoring (including system shutdown in failure case)
Channel status display and “channel ready” LEDs that indicate operating temperature has been reached