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.
|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,
|Peak Emission Wavelength||512nm||550nm|
|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, 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, and 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, the 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 in width x 2.5mm in 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, and GOS arrays are mounted on 25.4mm x 20mm boards. Other customized specifications could also be tailored upon requests.
Versions that are integrated with data readout electronics are also available in Shalom EO.
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