Vortex-ME4®- Silicon Drift X-Ray Detector

Name Silicon Drift X-Ray Detector
Type Vortex-ME4®
Overview Vortex-ME4TM is a four-element silicon drift detector (SDD) X-ray detection system with a total active area of 170 mmTM.

The Vortex-ME4TM offers superior energy resolution and high throughput performance to enhance the total analytical performance of the X-ray spectrometry system.

The Vortex-ME4TM (Model number 267-VTX-ME4) is composed of the following components, which are supplied as a package:

 

  • Power supply: Model number MMVI-PS-1
  • Detector Cable
  • Power Cable
  • xMAP XIA 4-channel digital pulse processor (optional)
Component Specifications
  • Detector material: Silicon
  • Detector sensitive thickness: 350 +/- 30um
  • Detector total active area (for 4SDDs) 170mm2
  • Window material: 12.5 um thick Beryllium
  • Preamplifiers 91 per SDD for a total of 4):
    • Type: Charge sensitive
    • Gain: 1.6 mV/keV +/-10%
    • Signal polarity: Positive
    • Reset: Electrical, synchronized for all channels, <1us duration
  • Cooling: Air cooling. Sufficient airflow needed. Do not Obstruct cooling fan vent.
Spectrometer Performance (each channel) using the xMAP
Energy resolution using 55Fe isotope:
FWHM (eV) at 5.9 keV
Peaking Time
12us
4us
1us
0.25us 		Typical
<145
<150
<170
<250 		Maximum
155
160
185
275
Output count rate (OCR) of each channel at 50% dead time, with optimum pileup rejection performance, measured with X-ray tube excitation of a Mn sample:
Peaking Time
12us
4us
1us
0.25us 		OCR (kcps) per Channel
>10
>30
>100
>250
Peak-to-background ratio (peak count at 5.9 keV divided by average counts between 1.6 keV and 3.2 keV background using 55Fe): >1000:1 at 12us peaking time
Counting efficiency stability for 8 hours using 55Fe isotope: <+/-0.5% rms
Counting efficiency stability with temperature (+5 to +30oC) using 55Fe: <200ppm/oC
Peak position stability with temperature (+5 to +30 oC) using 55Fe: <20eVat 200kcps ICR

 

Operating Environment

Ambient Temperature: +5 to +30 oC
Humidity: 20 to 80% RH (no condensation)
Operating Position Horizontal, or tilted from 0 – 90o with the detector end pointing down
Physical Specifications Weight: 4.3kg
Length x Height x Width: 425 mm x 165 mm 82 mm
Standard cable length: 3 m
4-channel digital pulse processor (xMAP from XIA): Digitization: 14 bit, 50 MHz
Gain: 16 bit, Gain DAC control
Peaking Time: 0.1 – 100 us
Pileup rejection: Pulse pair resolution (PPR) better than 100ns
ROIs: Up to 32 ROIs can be defined
Timing: Multiple spectra, or ROIs can be stored with continuous operation using dual memory bank configuration.
Integral non-linearity: <=0.1% over the full scale output range
Data output: Spectrum size: 1024, 2048, 4096, 8192
Channel size: 10eV
Software: xManager (from XIA)
Power Requirement and Consumption: Inlet line voltage (Inlet key selectable): 100V+15%, 115V+15%, 230V+20%single phase
Detector power consumption: <40 W
xMAP unit power consumption: <20 W

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