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Detection-level micro-channel plate with large size and small opening area ratio and preparation method thereof

A technology of microchannel plate and opening area, which is applied in the manufacture of luminescent cathode, secondary emitter electrode, electrode device of multiple dynodes, etc. It can solve problems such as difficult to control the effective preparation of microchannel plate

Active Publication Date: 2020-05-08
NORTH NIGHT VISION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Both are currently difficult to control to achieve efficient preparation of probe-grade microchannel plates

Method used

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  • Detection-level micro-channel plate with large size and small opening area ratio and preparation method thereof
  • Detection-level micro-channel plate with large size and small opening area ratio and preparation method thereof
  • Detection-level micro-channel plate with large size and small opening area ratio and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0040] In the specific preparation process, the ratio of the mixed glass filaments to the leather glass filaments is determined based on the final opening area ratio of the microchannel plate to be realized and the ratio of the outer diameter to the inner diameter of the hollow leather glass tube used. Preferably, the ratio of the mixed glass filaments made of hollow leather glass tubes and core glass rods to the glass filaments made of solid leather glass rods is 1: (2-15).

[0041] Preferably, it also includes evaporating a magnesium oxide film layer with secondary electron emission capability on the non-channel position of the input surface on the input surface of the prepared microchannel plate by means of thermal evaporation. Preferably, the thickness of the film layer is 10nm to 30nm, so that when the non-channel position on the input surface is hit by electrons, secondary electrons will be generated, and the secondary electrons can enter the microchannel plate channel ag...

specific Embodiment 1

[0044] An appearance diameter size D1 is 50mm, the effective detection diameter is 45mm, the ratio of the hole spacing D3 of the microchannel plate to the channel aperture D2 is 1.5, the opening area ratio is 40%, and the non-channel position of the input surface is coated with oxide film with a thickness range of 10nm. The microchannel plate with magnesium film layer has passed the test, and its detection rate can reach 91%. It is subjected to 6 half-sine wave shocks in the parallel and vertical directions, with a peak acceleration of 1600g and no damage under the condition of a duration of 0.3ms±0.03ms. The dark current density is 5.1×10-12A / cm2.

[0045] Its production method is:

[0046] Production method 1: Select a hollow leather glass tube with an outer diameter of D4 of 31.6mm and an inner diameter of D5 of 20mm (D4: D5 = 1.58), and cooperate with a solid core material glass tube with a diameter of D6 of 20mm to pull the monofilament, arrange the wire, It is processed...

specific Embodiment 2

[0049] An appearance diameter size D1 is 81mm, the effective detection diameter is 75mm, the ratio of the hole spacing D3 of the microchannel plate to the channel aperture D2 is 2, the opening area ratio is 22.55%, and the non-channel position of the input surface is coated with oxide film with a thickness range of 15nm. The microchannel plate with magnesium film layer has passed the test, and its detection rate can reach 67%. It is subjected to 6 half-sine wave shocks in the parallel and vertical directions, with a peak acceleration of 1600g and no damage under the condition of a duration of 0.3ms±0.03ms. The dark current density is 3.2×10 -12 A / cm 2 .

[0050] Its production method is:

[0051] Production method 1: Select a hollow leather glass tube with an outer diameter of D4 of 37.8mm and an inner diameter of D5 of 18mm (D4: D5 = 2.1), and use a solid core material glass tube with a diameter of D6 of 18mm to pull the monofilament, arrange the wire, It is processed by m...

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Abstract

The invention provides a detection-level micro-channel plate with a large size and a small opening area ratio and a preparation method of the detection-level micro-channel plate. The appearance diameter size (D1) of the micro-channel plate ranges from 50mm to 200mm, and the effective detection diameter ranges from 45mm to 190mm; the ratio of the hole spacing (D3) of the micro-channel plate to thehole diameter (D2) of the channel ranges from 1.5 to 5, and the opening area ratio of the micro-channel plate under the condition ranges from 3.6% to 40%; and the non-channel position of the input surface of the micro-channel plate has secondary electron emission capability, so that the micro-channel plate generates secondary electrons when colliding with the non-channel position during signal detection, and the secondary electrons enter the channel of the micro-channel plate again under the action of an electric field to form effective signals. When the micro-channel plate provided by the invention is applied to the field of detection, the mechanical strength of the micro-channel plate can be improved while meeting the requirement of a large detection area; and under the same detection area, the total surface area is smaller, the total gas adsorption amount is smaller, and the noise of the micro-channel plate is lower.

Description

technical field [0001] The invention relates to the technical field of microchannel plates, in particular to a detection grade microchannel plate with large size and small opening area ratio and its preparation. Background technique [0002] With the expansion of the application of micro-channel plates, micro-channel plates are now gradually being used in detection fields, such as single-photon detection, cosmic ray signal detection, etc., which only need to detect signal strength and do not require imaging processing of signals. Due to the weaker detection signal, higher working gain, complex sources of dark signals, and harsh working environment, the detection field has put forward higher requirements on the detection area and noise of the micro-channel plate. [0003] The smaller the opening area of ​​the micro-channel plate, the smaller the proportion of its hollow area, and the corresponding increase in the mechanical strength of the micro-channel plate. [0004] The m...

Claims

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Application Information

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IPC IPC(8): H01J9/12H01J43/24
CPCH01J9/125H01J43/246
Inventor 乔芳建张正君丛晓庆邱祥彪李婧雯司曙光任玲王兴超张振杨锋
Owner NORTH NIGHT VISION TECH
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