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  • Scintillation Detection Arrays (Coupled with Si PDs)
  • Scintillation Detection Arrays (Coupled with Si PDs)
  • Scintillation Detection Arrays (Coupled with Si PDs)
  • Scintillation Detection Arrays (Coupled with Si PDs)
  • Scintillation Detection Arrays (Coupled with Si PDs)
  • Scintillation Detection Arrays (Coupled with Si PDs)

Scintillation Detection Arrays (Coupled with Si PDs)

  • Linear Scintillation Array + Monocrystalline Si Photodiode Array + Mounting Board
  • Element size width 1.4mm, height 2.5nm, with element pitch of 1.575nm
  • Modules of 16 elements, 64 elements, and 128 elements are available
  • Wide spectral range of 350-1100nm (responsitivity peak at 950nm)
  • A variety of scintillator materials including: CsI(Tl), GOS ceramic, CdWO4 or other custom choices
  • Dual energy inspection is enabled when combining a CsI(Tl) detector for high energy and GOS detector for low energy
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Note: The following specifications are only of the 16-element standard modules, other custom specifications with maximum element number up to 128 elements could also be arranged by Shalom EO.

Specifications:

Element Picth 1.575mm Element Size Width: 1.4mm, Height 2.5mm
Number of elements 16 Response Spectrum 350-1100nm
Peak Responsitivity Spectrum 950nm Responsitivity (S: @550nm) 0.4 A/W(Typ.), 0.36 A/W(Min)
Dark Current (ID: @-10mV) 5pA(Typ.),20pA(Max) Terminal Capacitance (Ct: @0V, f=10kHZ) 41pF(Typ.),50pF(Max.)
Max Reverse(Bias) Voltage 10V Operating Temperature 0-60℃
Storage and Transport Temperature (With Package) -20-70℃ Operating Humidity (Non-Condensing) 30-90%RH
Storage and Transport Temperature (With Package/Non-Condensing) 40-95%RH Operating, Storage and Transport Atmospheric Pressure (mbar) 700-1060


Specifications and Properties of Scintillators:

Material GOS ceramic (Gd2O2S:Pr) CsI (Tl)(Cesium Iodide)
Dimension of Scintillator Thickness: 0.145mm,
Width: 3.5mm,
Length: 25.4mm
Thickness: 5mm,
Width: 3.5mm,
Length: 25.4mm
Peak Emission Wavelength 512nm 550nm
Decay Time 3000ns 1000ns
Refractive Index 2.2 1.79
Afterglow 0.01% @20ms <1% @20ms
Density 7.34 g/cm^3 4.51 g/cm^3
Non-uniformity of Sensitivity +/- 15% +/- 15%

This product is a portfolio of liner Scintillation Detection Arrays, all the modules are coupled with  16-element, 64-element, or even 128-element Front-Side-illumination(FSI) monocrystalline Si photodiodes as the photo readout devices. The detector modules exhibit reliability and versatility for diverse applications which involve non-destructive X-Ray inspection (e.g. baggage inspection, portal security, food inspection etc). Various scintillation materials such as CsI(Tl), GOS ceramic screens, CdWO4, etc. could be incorporated. Compared to PMTs, using photodiode readout are advantageous in terms of low cost, excellent electrical current linearity, long life span, and high quantum efficiency(also known as responsitivity).

The working course of such devices encompasses two stages. The scintillation stage, which is a process of illumination of the scintillation materials after receiving ionizing radiation, where the scattering of photons of the pixels is prevented by reflectors. In stage two, light emission is received by the silicon photodiodes which are applied with a reverse voltage and coupled individually to each scintillation pixel, where the photons irradiated generate electrical signals in the PDs, one photodiode element is coordinated to one pixel of the scintillators. The discrimination of the electrical signals of different elements realizes resolution.

Shalom EO’s scintillation detection arrays feature ultra-low dark current, high response speed, low terminal capacitance, and the photosensitivity spectrum extensively stretches from 350-1100nm, peaking at approx. 950nm. Additionally, this module is compact and lightweight, allowing easy integration, and only requires a low maximum reverse voltage of <10V, photosensitivity of the diode elements is impressively homogeneous.

Two standard scintillation materials are optional, the CsI(Tl) scintillation detector performs extremely high light output for high energy inspection, GOS ceramic scintillation detector is for low energy inspections, and CdWO4 scintillation has the virtue of both high light output and low afterglow, making them ideal for PD detectors. The scintillation pixels of one array are separated by a reflector with a wide assortment of materials selective (e.g. MgO2, TiO2, ESR, BaSO4 White Plastic, White Epoxy, etc.) to avert optical crosstalk. Combining one high energy detector and one low energy detector at the upper stage and the lower stage respectively, a dual energy X-Ray imaging sensor could be obtained. Furthermore, when aligning multiple detection arrays in a row, long size line detectors are formed.

About the specifications, the element size is 1.4mm width x 2.5mm height, the element pitch is 1.575mm, apt for compact security inspection systems. CsI(Tl) arrays are mounted on 25.4mm x 10.2mm boards, GOS arrays are mounted on 25.4mm x 20mm boards. Other customized specifications could also be tailored upon requests.


Typical Applications:

  • Non-destructive X-Ray Inspection
  • Security Check
  • Food Inspection
  • Thickness measurement
  • Industrial Process control
  • Mineral Detection
  • Waste Sorting

Drawings:

1. Si Photodiode Detection Arrays with CsI Scintillator for High Energy X-Ray Inspection



2.  Si Photodiode Detection Arrays with GOS Scintillator for Low Energy X-Ray Inspection


CdWO4 Scintillator Crystals

CdWO4 Scintillator Crystals

  • Low afterglow
  • High density and High-Z scintillator
  • Relatively high light yield and High Radiation Hardness
  • Single crystal and CdWO4 1D array or 2D arrays offered
  • Main applications: Security inspection, X-ray CT, High energy physics, Nuclear medicine
...

CsI(Tl) Scintillator Crystals

CsI(Tl) Scintillator Crystals

  • Extremely High Light Output
  • Excellent Mechanical Properties
  • CsI(Tl) Crystals and CsI(Tl) Arrays Available
  • Custom Short After-glow available
  • Applications: Nuclear Radiation Detection, Security and Industrial Inspection, Medical CT
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X-Ray Detector Boards

X-Ray Detector Boards

  • Based on Linear Si PD scintillation detection chips, supporting both single energy and dual energy X-Ray detection
  • Compatible with Shalom EO’s Scintillation Detection Arrays
  • Maximum 128 channel with custom pixel pitch and dimension
  • Common applications: security screening, non-destructive inspection, food testing, ore sensing, etc.
  • Customization for your specific application
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