Glass Capillary Array (GCA)
Glass Capillary Array (GCA)
Glass Capillary Array (CA) is a product that consists of millions of hollow fibers fused together to form a uniform and rigid structure. The tubes, or capillaries, have very small diameters and can be used for various purposes such as filtration, collimation, beam splitting, and multiplexed analysis. Glass Capillary Array can be made in different shapes, sizes, materials, and surface finishes depending on the application. They have high heat resistance, mechanical strength, optical quality, and chemical stability.
Specification
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Capillary Diameter
Hole diameter is the diameter of each Single Capillary (hole).
- Typical Value: 4um,6um,25um,100um
- Min Value: 1um
- Max Value: 200um
The hole diameter influences the sample volume, the electric field strength, and the heat dissipation.
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Thickness (or Length)
The height of the capillary array, usually measured in millimeters.
- Typical Range: 0.5mm - 1mm
- Lower Range: 0.20 - 0.5mm
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Length to Diameter Ratio (L/D)
L/D ratio in capillary array is the ratio of the length to the diameter of the capillaries.
- Typical Value: 50 - 200
- Max Value: 600
A longer and thinner capillary may require more sophisticated fabrication techniques and materials, which can increase the production cost and complexity
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Format Available
Single Capillary (Hole) Shape
- Circular
- Rectangle
Array Shape Available:
- Circular
- Rectangle
Array Dimension
- Typical: dia25mm - dia50mm
- Max: dia200mm
- Min: dia6mm
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Open Area Ratio (OAR)
OAR ratio is the open area ratio of a capillary array, which is defined as the ratio of the cross-sectional area of the capillaries to the total area of the array.
- Typical Range: 50% - 65%
- High Range: 70% - 80%
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Material & Fabrication
- Material: Borosilicate Glass
- Heat Resistance: up to 500°C
- Lead Free: Optional
(Hole shape and uniformity may vary depends on materials) - Surface Coating Available: Ni-CR, ITO
- Interal Coating(on wall): ITO, TiO2
A Zoom-In Look on the GCA Plates
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750x Magnificaiton
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1500x Magnificaiton + Measurement
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3000x Magnificaiton
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3750x Magnificaiton
Applications
Using Capillary array as a filter
High Resolution Sctinllator Plate
The liquid scintillator is a mixture of organic solvents and fluorescent molecules that emit light when they are excited by radiation. The liquid scintillator is injected into the capillary holes using a syringe or a pump, and then sealed with epoxy resin or silicone rubber.
The capillary array then acts as an image converter, which transforms the radiation image into a light image. When a neutron or a gamma ray hits the liquid scintillator inside a capillary, it produces a flash of light that travels along the capillary by total internal reflection. The light reaches the end of the capillary, where it is detected by a photodetector, such as a photomultiplier tube (PMT) or a silicon photomultiplier (SiPM). The photodetector converts the light signal into an electrical signal, which can be processed and analyzed by a data acquisition system. By measuring the intensity and shape of the light pulses from each capillary, the detector can determine the type, energy, and direction of the incident radiation.