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                            Microchannel Plate
                            Date:2013/12/30 16:39:41   [back]

                            Microchannel Plate
                            Microchannel plates (MCPs) are flat glass discs containing millions of small diameter pores. They have been used for many years as compact electron multipliers: mainly in night vision image intensifier tubes. More recently, similar devices have been used to focus X-rays by reflection from the inside surfaces of the channels. These provide a compact, low mass, relatively inexpensive alternative to conventional X-ray focusing mirrors. The technology shows great potential for imaging in X-ray astronomy.

                            There are mainly two kinds of MCP’s available diameter 25mm and 18mm. The detailed specifications are below: 

                            Typical parameters
                            F25mm MCP
                            F18mm MCP
                            Plate Diameter
                            F32.7 ± 0.04   mm
                            F24.8 ± 0.04  mm
                            Useful Diameter
                            F26               mm
                            F18.8             mm
                            Plate Thickness    
                            0.47 ± 0.02      mm
                            0.38 ± 0.02 mm
                            0.33 ± 0.02 mm
                            OAR
                            > 60%
                            > 60%
                            Pore Size:
                            10.5           mm
                            8.0 mm
                            6.0 mm
                            Channel Pitch
                            12.5 ± 0.5 mm
                            10.0 ± 0.5 mm
                            8.0 ± 0.5 mm
                            Bias Angle
                            12.5°± 1°        degrees
                            6°± 1°     degrees
                            Electrode Dia.
                            F31.8             mm
                            F23.9      mm
                            Dark Current at 1000V:
                            £ 5 x 10 –12 A / Cm2
                            £ 5 x 10 –12 A / Cm2

                            Features
                              1. Pore size:5~50 μm
                              2. Open ration:≥60%
                              3. Electrode material:Ni-Cr
                              4. Depth of electrode:
                               Input plane:≤0.8d (d : pore size)
                               Output plane:2~3d (d: pore size)
                              5. Bake out temperature:≤400℃
                               High output current, wide dynamic range,high gain,low noise, long life time
                              6. With or without solid glass border

                             Typical paameters for MCPs

                             Type
                             Useful Diameter
                            mm
                            Channel Diameter
                            μm
                             Channel Pitch
                            μm
                             Resistance
                             Surface Resistance
                            Ω
                             Gain
                            800V
                            Φ16  
                            Φ12
                            6
                            7.5
                              50~300
                            120
                            700
                            Φ22  
                            Φ16
                            6
                            7.5
                              50~300
                            120
                            1200
                            Φ25
                             Φ18.8 
                             
                            6
                            8
                            70250
                            100
                            1500
                            8
                            10
                            70250
                            100
                            1500
                            10
                            12.5
                            70250
                            100
                            1500
                            Φ33
                                
                            Φ26
                            6
                            8
                            50300
                            100
                            2500
                            8
                            10
                            50300
                            100
                            2500
                            10
                            12.5
                            50300
                            100
                            2500
                            Φ36
                            Φ31
                            12
                            14
                            80300
                            160
                            3000
                            Φ50
                            Φ45
                            25
                            27
                            50300
                            300
                            7000*
                            Φ56
                            Φ50
                            25
                            27
                            50300
                            300
                            7000*
                            Φ81
                            Φ75
                            27
                            30
                            30200
                            500
                            7000*
                            Φ100
                            Φ95
                            27
                            30
                            30200
                            500
                            7000*
                            Φ106
                            Φ100
                            27
                            30
                            30200
                            500
                            7000*

                                                                                                                             *test voltage1000V

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