CN1089361A

CN1089361A - Make the method for small-size microchannel plate

Info

Publication number: CN1089361A
Application number: CN 93118724
Authority: CN
Inventors: 郭银其
Original assignee: XiAn Institute of Optics and Precision Mechanics of CAS
Current assignee: XiAn Institute of Optics and Precision Mechanics of CAS
Priority date: 1993-10-21
Filing date: 1993-10-21
Publication date: 1994-07-13
Anticipated expiration: 2013-10-21
Also published as: CN1040913C

Abstract

A kind of method of making small-size microchannel plate, be characterized in glass filament bundle is done to arrange in order in glass tube, method is simple, reliable, and its hole shape of prepared microchannel plate is just being advised, arranged in order, is being evenly distributed, improve production efficiency and product quality reduces production costs greatly.

Description

Make the method for small-size microchannel plate

The invention belongs to the improvement of electron multiplication device method for making, relate to the photoelectron technology field.

Microchannel plate is the glass tablet, on ten million electron multiplier is arranged, it can change into the bright image that is made of bright spot to the dim figure of electromagnetic radiation.The manufacturing technology of large scale (as φ 100mm) and large-size (as φ 50mm) microchannel plate is all ripe day by day at home and abroad, Xi'an ray machine institute of the Chinese Academy of Sciences, Beijing Glass Inst., 205 in weapons portion all can manufacture, and foreign literature also has a large amount of reports.

Small-size microchannel plate is often referred to the microchannel plate of diameter less than 10mm, and because of its size is little, method for making is different, and particularly in enormous quantities, low cost, high-quality, high efficiency production require especially strictness to its manufacture craft.Now adopt two kinds of methods usually, the one, glass filament bundle is inserted in the glass tube, till sticking with disorderly, so just formed local distribution state as shown in Figure 1, pull-rod under the high-temperature vacuum condition is cut into slices again, passage distributes as shown in Figure 2 as a result, the cavity occurs and arranges unordered phenomenon; Second method is that the glass filament bundle of one group of solvable core and another glass filament bundle of organizing soluble core are arranged in as shown in Figure 3 shape, it outside the garden soluble core, it in the garden solvable core, under the high-temperature vacuum condition, pull into hexagonal rod, cut into slices in the garden of regrinding, the method has masty problems such as tow easily scatters in waste material, cost height, the pull-rod process.

The objective of the invention is to design a kind of method for making of small-size microchannel plate, the microchannel plate hole shape of making is just being advised, arrange in order, be evenly distributed, and enhance productivity greatly, reduce cost, improve the quality.

The invention is characterized in that the alternative line expansion coefficient is very near (differing 5 * 10 ^-7In the scope) the solvable core rod and the glass tube of soluble core, rod is injected in the pipe, draw wire, be cut into suitable length for row's silk usefulness; Choose again with the glass tube of silk equal length and make sleeve pipe, use paper gasket in inwall, form the bore of this end, as the size of next step row's silk at an end of pipe; Row's silk is to be in line to be arranged on row's silk mould bases of forming on the flat board three modules to carry out, sleeve pipe lining paper end near mould bases, its axis and mould bases center are straight line, as shown in Figure 4 and Figure 5, when silk row, thread go into into about 1 centimeter of sleeve pipe to what be positioned at the casing inner diameter scope, take sleeve pipe away after filling up, just forming with the casing inner diameter is a cocainine bundle of size, as shown in Figure 6; Then the tow concave ends is processed into the shape and size identical with the other end, forms tow as shown in Figure 7, two ends are the garden cylindricality, and center section is a sexangle; With two garden styletable face sintering, tie cylinder two ends, garden with glass thread, take off tow from row's silk mould bases, the silk of unsintered hexagonal part is removed, insert tow in the glass bushing, as shown in Figure 8 again; Carry out operations such as pull-rod, section, rubbing down, burn into hydrogen reduction, encapsulation again by the requirement of prior art, prepared microchannel plate has real core limit, and hole shape is just being advised, arranged in order, and as shown in Figure 9, its quality obviously improves, and cost reduces greatly.

Accompanying drawing 1 is the synoptic diagram that the cavity appears in glass filament bundle in the prior art in lack of alignment technology, accompanying drawing 2 is the empty formed crimp synoptic diagram among Fig. 1, accompanying drawing 3 is the end view of one group of glass filament bundle being made up of solvable core glass tow and soluble core glass tow in the prior art, accompanying drawing 4 is a glass filament bundle arrangement mould bases structural representation of the present invention, the synoptic diagram that accompanying drawing 5 is arranged on mould bases in order for glass filament bundle of the present invention, the synoptic diagram that accompanying drawing 6 takes out from mould bases for orderly arranged glass tow of the present invention, accompanying drawing 7 is tow both ends of the surface processing of the present invention, synoptic diagram after being sintered to fix, accompanying drawing 8 is for inserting the synoptic diagram in the glass tube cover behind the present invention the removes unnecessary glass fiber, accompanying drawing 9 be that the prepared last end face that forms of microchannel plate is illustrated and local enlarged diagram.1 is mould bases among the figure, and 2 is glass filament bundle, and 3 is glass bushing.

Embodiment: choose external diameter φ 35mm, long 500mm, wall thickness 3.5mm, lead glass pipe material as the boron glass of cladding and diameter phi 31mm, length 500mm as solvable core material, with the fine grinding of core material rod, rod can be put in the pipe, form core pipe material; Send it to the wire drawing machine wire drawing, pull out the silk footpath and be the monofilament of 0.5mm, be cut into the monofilament of long 500mm, collect about about 3500 altogether.Row silk be arrange by front-seat silk technology on row's silk mould bases silk intact after, on wire drawing machine, be drawn into the rod of φ 7mm again, in the pull-rod process, need to extract air in the glass tube with vacuum pump.The glass bar of φ 7mm is cut into the many rods of long 100mm, stick into a bundle with wax, in the multitool section, be cut into the thick sheet of about 0.7mm, behind the thin slice rubbing down, be placed on the glass supporter, each support is put 600, corrodes in the HCl of concentration 1N solution, with the solvable core material dissolving in the every monofilament, thereby form the netted platelet of forming by more than 3000 apertures.The glass sheet that to finish etching process at last is placed on the support, in saturated nitrogen atmosphere, high temperature reduction a few hours, this technology is finished in the back glass sheet and is reduced because of heavy metals such as plumbous bismuths, surface resistance greatly reduces, glass sheet carefully encapsulates by dustproof, moistureproof standard by the microchannel plate that becomes black again.

Claims

1, a kind of method of making small-size microchannel plate is characterized in that, proposes a kind of step of solvable core glass silk being done orderly arrangement in soluble core glass pipe:

A. choose suitable solvable core rod and soluble core glass pipe, rod is injected in the pipe, require wire drawing routinely, be cut into the length of regulation, use for row's silk;

B. choose the soluble core glass pipe identical, be lining in inwall with thin paper, form the bore of this end, the size during as row's silk at an end of pipe with tow length;

C. with glass tube lining paper end near a row silk mould bases, its axis and mould bases center are same straight line, during row's silk, when the position of silk is in the bore scope, thread are just gone into into a segment distance in the sleeve pipe, up to filling up, take sleeve pipe away, and be standby;

D. on fiber-arranging device, the tow concave ends is processed into the shape and size identical with the other end, forming two ends is the garden cylindricality, and the centre is hexagonal tow.

E. with tow two garden styletable face sintering, tie the garden cylinder with glass thread again, take off tow, hexagonal silk is partly removed, formed a positive tow of outer garden rule from row's silk mould bases;

F. tow is put in the above-mentioned standby sleeve pipe, the size of the requirement of technology and design code is cut into slices routinely, and rubbing down, burn into hydrogen reduction, encapsulation obtain the small-size microchannel plate that hole shape is just being advised, arranged in order, is being evenly distributed.

2, method according to claim 1 is characterized in that, solvable core rod can be boron glass, and soluble core glass pipe can be lead glass, and the two linear expansion coefficient differs 5 * 10 ^-7In the scope.

3, method according to claim 1 and 2 is characterized in that, described row silk mould bases is made up of three row's silk modules and platform, and with the predetermined distance arrangement that is in line, the module internal diameter is shaped as regular hexagon on platform for three modules.