Pore diameter 5-12 mm or on request Open area ratio ≥ 60% Electrode material Ni-Cr Input / Output penetration 0.3 ~ 0.7d
1.5 ~ 2.5d (d: channel diameter ) Bake out temperature ≤ 380 ℃
Round or rectangular shape and any other shape upon request
Standard Size 25mm,33mm,up to 50mm
Microchannel Plate (MCP) is a large area two-dimesional periodic array of high spatial resolution electron multiplier detector with very high time resolution, which is composed of many small channels fused together and formed in a very thin glass plate. The surface of MCP over the input and output with a resistive secondary electron emission film layer, and ions hit the inner wall of the capillaries, creating a large number of secondary electrons.
Application: Photo Multiplier/ Image Intensifier / X-ray Image Intensifier/ High Speed Oscillscope/ Photon Account/ Detect for Soft X-rays, UV Photons, Electrons, Ions, Charged Patricales and Subatomic Particles
Channel Bias Angle
The channel bias angle is an angle formed by the channel axis and the vertical axis to plate surface.
Open Area Ratio (OAR)
Open area is a ratio that defines how much of the open area is occupied by the total area of MCP.
Metal Coating (Electrodes)
The surface of MCP over the input and output are coated on the inside with a electron-emissive material(Nickel-chromium electron). The capillary is biased at a high voltage, and an ion hits the inner wall of one of the capillary, generating a large number of secondary electrons.
Gain is defined as the ratio of the output current to the input current of MCP.
The gain is basically set by the ratio of the length to diameter: L/D. Most MCPs have gains in the range 75 < Gain < 175.
Pulse height distribution(PHD)
PHD is the distribution of the amplitude of the output pulses at a constant applied voltage from a MCP.
As shown in the figure, PHD is usually characterized by the ratio of its full width at half maximum (FWHM) to the peak in the pulse height distribution, it is usually expressed as a percentage. The narrower the PHD and the smaller the FWHM, all the output pulses are close to the same value.
A typical MCP exhibits extremely low dark current at an applied voltage of 1 kV, less than 0.5 pA / cm2. Even with two-stage or three-stage MCP, the dark count rate is still low at 1 kV applied to each stage, less than 3 cps / cm2.
The spatial resolution of a micro channel plate is ultimately dictated by the channel pitch and the centre-to-centre spacing. The standard channel diameters ranging from 6μm to 18μm.
The following figure shows the relationship between channel pitch and spatial resolution.
The MCP resistance can be controlled by the material composition and manufacturing conditions used to make the MCP. Considering output saturation, lower resistance is expected.
However, because the MCP operating temperature increases due to power consumption, the resistance can only be reduced by a certain amount.
Although the MCP resistance varies by type, it is usually between 100 M9 and 1000 MQ2. Regarding requiring high output current in applications, 5 MI to 30 MQ2 low resistance MCP is very useful.
M25/6 M25/10 M33/6 M33/10 Overall Diameter (mm) Φ25.0 Φ25.0 Φ33.0 Φ33.0 Effective Diameter (mm) ≥Φ18.8 ≥Φ18.8 ≥Φ26.0 ≥Φ26.0 Pore diameter (μm) 6±0.5 10±0.5 6±0.5 10±0.5 Thickness (mm) 0.4±0.02 0.4±0.02 0.38±0.02 0.38±0.02 Channel pitch (μm) 6±0.5 10±0.5 6±0.5 10±0.5 Bias angle (degree) 6±0.5° 6±0.5° 6±0.5° 6±0.5° Resistance at 500V(MΩ) 100～300 100～300 50～300 50～300 Sheet Resistance (Ω) ≤100 ≤100 ≤100 ≤100 Dark Current (A/cm2) ≤5×10-12 ≤5×10-12 ≤5×10-12 ≤5×10-12 Gain at 800V ≥ 1500 ≥ 1500 ≥ 2500 ≥ 2500