Plastic scintillator performance parameters

The performance parameters of the plastic scintillator vary depending on the matrix, the scintillation substance, and the second solute, the difference in the wavelength and the difference in scores. Therefore, the varieties of plastic scintillators are various and the performance parameters vary greatly.
The emission spectrum of the plastic scintillator is consistent with the emission spectrum of the scintillator, and the emission spectrum of the scintillator
different. When a wave remover is used, the emission spectrum of the plastic scintillator is consistent with that of the wave shifter.
The light output of the plastic scintillator increases with the increase of the concentration of the scintillator substance, and reaches an extreme value when the mass concentration is 1% to 4%. As the concentration continues to increase, the light output decreases. Adding 0.01% to 0.02% of the mass of the agent can dramatically increase the light output.
Large quantities of heavy charged particles or electrons are radiated over a long period of time, causing the plastic scintillator to be damaged and the light output to be reduced.
The energy response of the line attenuation coefficient of the plastic scintillator is shown in the figure.

FROM:baidubaike

Optical Windows

A variety of  optical windows are offered in Hangzhou Shalom EO:  circular windows, rectangular windows, wedged windows and elliptical windows, with dimensions range from Diam. 0.8mm to 300mm. We are able to process the large volume productions, and also deal with the small quanity of prototypes. A wide range of  optical crystals and optical glass materials substrates are available.

SPECIFICATIONS

Specifications 
Materials BK7, B270, FS, BaF2, CaF2, MgF2,Quartz, YAG , Ge, Si, Sapphire, ZnSe, ZnS and other customized materials;
Spherical configurations circular windows, rectangular windows, wedged windows and elliptical windows
Size Tolerance +/-0.1mm
Thickness Tolerance +/-0.2mm or upon request
Surface quality(S/D) 40/20 or upon customer’s request to 10/5
Aperture 90% of central dimension
Flatness Lambda/4 @ 633nm or upon customer’s request to Lambda/10 @ 633nm

Note: The custom specifications are available upon customer’s request.

Infrared Optics >> Infrared Windows

IPL Filters and Waveguides-Filters

IPL is short for Intense Pulsed Light, IPL machines are used for a range of treatments as hair removal, skin rejuvenation, pigmentation removal, acne clearance and vascular therapy. Filters and waveguides are critical components in IPL machine, it blocks the harmful UV light sourcing from Xe lamps.

Hangzhou Shalom EO provides a variety of IPL filters and waveguides made from sapphire, fused silica and BK7, with various types of coating band. The available wavelength are: 430nm; 450nm; 480nm; 510nm; 530nm; 560nm; 580nm; 640nm; 690nm; 700nm; 750nm. Some standard types of the filtesr are in stocks at fast delivery, the customized filters are available upon  request

Pixellated Arrays-CdWO4 Arrays

CdWO4 arrays has wide applications, its extremely low afterglow property is of great importance of fast inspection, especially in the cargo container of customs, while in the X-CT equipment due to its relatively high light output, high density and strong prevention of X-ray property, also in the high energy physics because of its strong anti-radiation.

Modules or types
Single element size: customized
Linear array: 8, 16, 32, 64…elements
2-Dimensional array: 6×10, 12×18, 24×36…elements
Light output: 12,000-15,000 Photons/Mev
Afterglow: 0.1%(max) after 3ms
Reflector: polymer with TiO2(excellent reflection to ensure minimized cross talk)
Application Notes
· Security inspection
· X-ray CT
· High energy physics
· Nuclear medicine

Lithium Aluminate (LiAlO2) Crystals and Substrates

Lithium Aluminate or LiAlO2 is a potential substrate for III-V nitride thin films due to its excellent lattice mismatch to GaN (<0.2% at <100> ), chemical stability at high temperature and cost effective. The lattice parameter of Lithium Dioxogallate (LiGaO2) and Lithium Aluminium Oxide (γ) (LiAlO2) crystal can match with the Gallium Nitride film very well. The mismatch coefficients are 0.2% and 1.4% only for LiGaO2 and LiAlO2, much smaller than that of the common used substrates such as <0001> sapphire (14%), <100> MgO (3%), <0001> SiC (3.5%). The Gallium Nitride film is a very important material for blue, violet, UV and white LED. A substrate material that matches the film to be grown well is very important to get a nice GaN epitaxial film.

Specifications 
Orientations <100>, <110>, <111>
Orientation Tolerance ±0.5°
Standard Size (mm) Ф30,Ф20, 20×20, 15×15,10×10,10×5,10x3mm
Thickness 0.35 mm, 0.5 mm and 1.0 mm
Dimensional Tolerance ±0.1mm
Grown Boule 55 mm dia. x 50-80 mm length
Surface Quality 20/10 S/D
Flatness 1/4 Lambda @633nm for thickness less than 2mm
Parallelism 30 arc sec.
Perpendicularity 5 arc minutes
Wavefront Distortion <1/4 Lambda @ 633nm
Micro Roughness (5μmx5μm) Ra:<1Å

Plastic scintillator performance parameters

Plastic scintillator performance parameters with the substrate, scintillating material and the second solute – shift the difference between the different and the difference. Therefore, the variety of plastic scintillators is varied, the performance parameters vary widely.

The emission spectrum of a plastic scintillator is consistent with the emission spectrum of a scintillating substance, whereas the emission spectrum of a scintillator

different. The emission spectrum of the plastic scintillator coincides with that of the wave-shifting agent when the wave-shifting agent is applied.

The light output of plastic scintillator increases with the increase of scintillation material concentration, reaching the extreme value when mass concentration is 1% ~ 4%. Continue to increase the concentration, but the light output decreases. The addition of mass concentration of 0.01% ~ 0.02% of the wave-shift agent can make a sharp increase in light output.

For a long time heavy fluences heavy charged particles or electron radiation, so that the plastic scintillator damage and thus reduce the light output.

Hangzhou Shalom Electro-optics Technology Co., Ltd. is located in the high-tech area of the beautiful touring city Hangzhou, about 300Km from Shanghai city. Besides its beautifulness and long history, Hangzhou is well known for its high-tech industry of IT, optical fiber communications and electro-optics.

Achromatic Waveplates-Laser Component

Achromatic waveplate or retarders is made from two different substrate materials such as crystal quartz and magnesium fluoride. For the single material waveplates the working wavelength is very limited because of the dispersion of the material. While Achromatic Waveplate use two different kinds of material, the dispersions of the birefringence are also different. Hence such waveplate is not sensitive to the wavelength change.

Hangzhou Shalom EO offers the custom achromatic waveplates or retarders upon customer’s request, and the stocked modules are available in fast delivery and low cost.

Optical Lenses

Hangzhou Shalom EO offers a variety of optical lenses: plano-concave, plano-convex, convex- concave, double convex, double concave, cylindrical lenses, rod lenses and ball lenses. Dimensions range from 0.8mm to 300mm. We are able to process the large volume productions, and also deal with the small quantity for your prototypes. A wide range of optical crystals and optical glass materials substrates are available.

SP101 Plastic Scintillators

SP101 Plastic Scintillators are used for Gamma-ray detection. They are widely used in various applications, such as isotope gauge, vehicle radiation detection and environmental radiation monitoring systems.

Application Notes
Isotope gauge
Vehicle radiation detection
Environmental radiation monitoring
Anti-Compton detector

Features
Easy to be processed into various shapes
High transparency
Easy to be processed into large volume scintillators
Short decay time(10^-8~10^-9s)
High mechanical strength
Good vibration resistance
Good impact resistance
Good humidity resistance
Best anti-radiation property

 

Basic Properties
Softening temperature (℃) 75~80
Density (g/cm3) 1.05
Hygroscopic None
Operating temperature (℃) -40~55
Wavelength of emission max. (nm) 423
Refractive index @ emission max 1.58
Decay time (ns) 2.8
Photoelectron yield (% of NaI(Tl)) (for γ-rays) 20~30

Note: The boules, blanks, polished elements are available.

 

IR Windows-Infrared Windows Assemblies for Thermal Imaging Inspection

Inspection is necessary for high power and high voltage electric installations to avoid the possible accident, the thermal imagine is found to be the optimal and effective way for this application. In some countries, thermal imagine inspections is compulsory for accident insurance. And in some industrial equipment likethe high temperature metallurgic oven, it is necessary to use the thermal imagine to watch its temperature inside. An infrared windows assembly is needed to be installed on the housing of the electric and industrial equipment as the viewport windows for thermal image camera.

Features

Applications
High power and high voltage electric installations, switch cabinet;
High temperature metallurgic oven;
Mineral and petroleum industry.

Design and standard
The windows assembly consists of metal flange, crystals windows and metal protective cover;
The protective cover is fixed by two small magnet nubs;
The whole windows is fixed on the cabinet house by the flange, no screw is needed;
Various types of infrared crystals is available: CaF2; BaF2; Germanium; Sapphire; Silicon; ZnS; ZnSe;
Confirm to the dust tight standard IP67 of NF EN6052.

Materials Used 
Flange Metal
Housing or Cover Metal Materials
Optics CaF2, BaF2, Ge, Sapphire, silicon, ZnSe, ZnS windows
Cover fixing Fixed by Magnet nub
Water and dust ingress IP67 of NF EN60529
Typical Dimensions 
Models Body Diameter Crystals Diameter Viewing Diameter Assembly Thickness
SHIRW-60 84 mm 60mm 55mm 22mm
SHIRW-75 99 mm 75mm 70mm 22mm
SHIRW-100 124 mm 100mm 95mm 22mm

Application notes
Installation steps
Step 1: Calculate and decide the position where the windows would be installed according to the view angle of the thermal imagine camera;
Step 2: Drill a hole according to the size of the windows assemblies;
Step 3: Install the whole windows assemblies;
Step 4: Open the protective cover and make the testing of the inspection.
Select the suitable crystals materials for your applications:
Several factors you should take into consideration during the selection of crystals materials: Wavelength range, environment (temperature, humidity and vibration ect.) and cost. Here is the specification of the materials for your reference.