CN105513930B - Pulsed homogeneous X-ray pipe - Google Patents
Pulsed homogeneous X-ray pipe Download PDFInfo
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- CN105513930B CN105513930B CN201610044852.XA CN201610044852A CN105513930B CN 105513930 B CN105513930 B CN 105513930B CN 201610044852 A CN201610044852 A CN 201610044852A CN 105513930 B CN105513930 B CN 105513930B
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/04—Electrodes ; Mutual position thereof; Constructional adaptations therefor
- H01J35/06—Cathodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/14—Arrangements for concentrating, focusing, or directing the cathode ray
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/22—X-ray tubes specially designed for passing a very high current for a very short time, e.g. for flash operation
Abstract
The present invention relates to a kind of pulsed homogeneous X-ray pipe, the pulsed homogeneous X-ray pipe includes ray tube main body I, cathode light sources II, electron beam filter mechanism, the cathode light sources II are arranged on above ray tube main body I, electron beam filter mechanismIt is arranged on one end of ray tube main body I.The pulsed homogeneous X-ray pipe can be good to the electron screening of different-energy, excitation ray monochromaticjty, and ray conversion efficiency is improved, long service life, and overall performance stabilization, power is small.
Description
Technical field
The present invention relates to a kind of new monochromatic X-ray source, specifically a kind of pulsed homogeneous X-ray pipe, mainly
It is applied to the imaging of X-ray characteristic spectrum and X-ray fluorescence spectra detection.
Background technology
X-ray has the characteristics of wavelength is short, and penetration capacity is strong, and field of non destructive testing is widely used in up to now, including
Imaging flaw detection, spectral detection etc..
X-ray imaging technology, be exactly using X-ray penetration capacity it is strong the characteristics of, it being capable of penetrating material and according to penetrating
The mass-absorption coefficient of material is of different sizes, is realized to the lossless of internal structure of body by detecting the attenuation degree of X-ray
Imaging.X-ray Dynamic Non-Destruction Measurement industrially has a very wide range of applications, and it can be not only used for metal detection, is also used for
Nonmetallic detection.The defect produced in the mill to interiors of products, such as bubble, foreign matter impurity, crackle, segregation, solder joint all may be used
Detected using ray.The industry of application has electronic device industry, Aero-Space, automobile making, war industry, precision equipment etc.
Deng.
X-ray spectrum technology, it is different according to Atom of Elements using radiation exposure sample, it is illuminated after inspire
Fluorescent X-ray energy it is also different, different ray energy intensity are measured by the reception of detector respectively, for material unit
The qualitative and quantitative analysis of element.
In X-ray Non-Destructive Testing now, using Coolidge tube as source, belong to hot cathode and excite electronics.Using
The disadvantage of this negative electrode is the randomness of thermal excitation, and temperature is higher, and the quantity of electronics effusion metal is more, but due to negative electrode shape
Shape, uneven, initial electron energy uncertainty etc. of being heated so that escape free electron near filament and be in a kind of random like
State, this is also the principal element of sensitive detection parts random noise, pulsed X-ray tube, from negative electrode in secondary X-ray detection
Change initiating electron beam energy, that is, constrain the energy range of electronic impact target, improve the unicity in emergent ray source, when sharp
Hair X-ray by after detectable substance, no matter be imaged or fluorescence spectrum detect so that ray energy is evenly distributed, from send out fundamentally drop
Low ambient noise.
The content of the invention
To solve the above mentioned problem that prior art is present, the invention provides a kind of pulsed homogeneous X-ray pipe, the pulse
Formula homogeneous X-ray pipe can be good to the electron screening of different-energy, excitation ray monochromaticjty, and ray conversion efficiency is improved, and uses the longevity
Life length, overall performance stabilization, power is small.
Technical solution of the present invention is as follows：The pulsed homogeneous X-ray pipe includes ray tube main body, cathode light sources, electron beam
Filter mechanism, the cathode light sources are arranged on above ray tube main body, and electron beam filter mechanism is arranged on ray tube main body
One end.
Wherein, described ray tube main body includes shell, the supervisor being arranged in shell, the spiral shell being arranged in supervisor's taper end
Spool, be arranged on supervisor taper end on solenoid side electromagnet, be arranged on supervisor in ceramic case, be arranged on ceramic case one end
The uniform arrangement of vertical setting of types three copper rods with contact conductor, middle copper rod is through shell, supervisor and ceramic case and Au negative electrodes
Structure is connected, and the Au cathode constructions are made up of negative electrode annular outer cover and Au negative electrodes, and MCP electronics is additionally provided with the ceramic case
Multiplier device, the MCP electron multiplications device by MCP (Φ 50), the MCP fixtures being arranged on outside MCP, be arranged on MCP two
The MCP pressure ring A and MCP pressure rings B of side is constituted.
In described Au cathode constructions, Au negative electrodes are installed on negative electrode annular enclosure, electrode by metal ring trim ring
Lead is drawn from negative electrode annular enclosure and is fixed on middle copper rod and is connected with Au negative electrodes；Described ceramic case is shaped as
Semienclosed six face cube structure, adjacent two sides perforate, its mesopore as light source incidence end, hole goes out as electron beam
End is penetrated, it is an entirety to pass through ceramic case and be connected thereto with the middle copper rod of negative electrode annular cage connection.
MCP pressure rings A on described MCP electron multiplication devices is connected by contact conductor A with upper copper rod, MCP pressure rings B leads to
Contact conductor B is crossed to be connected with lower copper rod.
The solenoidal coiling length is that L, internal diameter are D, are enclosed in the taper end of ray tube main body close to MCP electronics times
Increase device, two sections of solenoid pin connects electric power system makes solenoid inside produce magnetic field, and direction is parallel with beam motion direction,
Play the direction constraint to outgoing electron beam；
Described electromagnet is arranged on the both sides up and down of ray tube main body taper end by U-shaped fixture, is mutually perpendicular to, opposite
Spacing between opposite polarity, two blocks of special electromagnet is D, and D is ray tube main body taper end diameter, and magnetic field range length is L, intensity
It is T, the external electric power system of supply lines that the electromagnet is drawn.
Described cathode light sources include square aluminum hull, be arranged on by ultraviolet LED fixture it is ultraviolet in square aluminum hull
LED, the lens fixing shell being arranged on below square aluminum hull, it is arranged in lens fixing shell by jackscrew and cushion angle
Extender lens；Wherein described square aluminum shell is the installation fixing shell of ultraviolet LED, and playing prevents ultraviolet radiation and ultraviolet LED
Thermolysis, extender lens be arranged on ultraviolet LED exit portal lower section, front and back position with install jackscrew as micro-adjusting mechanism,
Ultraviolet optical focus be can control in the position of negative electrode, outgoing electron beam angle degree is adjusted；Cathode light sources are integrally attached to penetrate as one
The negative electrode top of spool main body.
In order to ensure single energy electron beam outgoing, one electron beam filter is set in one end of ray tube body interior
Structure, the electron beam filter mechanism III includes high pressure connection, the spring copper sheet of connection high pressure connection, is arranged on supervisor's taper end axis
The fixing axle of line position, be arranged on supervisor fixing axle on electronic filter grid and ring-shaped pottery base, be uniformly arranged annular make pottery
Copper anode substrate on porcelain base, the anode target material for being arranged on copper anode substrate top, to be connected to copper anode substrate another
The round end fixed screw of one end, the motor for being connected to fixing axle outer end.The electronic filter grid and ring-shaped pottery base are concentric
Coaxial configuration, and three copper anode substrates are fixed on ring-shaped pottery base, mutual angle is 120 degree, electronic filter
Position of opening and three copper anode substrate locations on grid are corresponded, and rotating overall structure by motor control selects target
Material.
The electronic filter grid are circular discs, relevant position (the filtering electronic beam Exit positions) perforate on disk, as electricity
Beamlet emergent light is blocked, and pore size determines the focal spot size and energy range of electron beam；Three are set in technical solution of the present invention
Identical copper anode substrate, the copper anode substrate is cylindrical structural, upper end is steamed with tapered ramp as anode material
Surfacing, respectively by Mg, Cr, W element evaporation on the surface of tapered ramp, copper anode substrate lower end is the circle with screw pedestal
Cylindricality, it is screwed on ring-shaped pottery base；The ring-shaped pottery base is the firm banking of copper anode substrate, in
Heart ceramics fixing axle is fixed with electronic filter grid center；The spring copper sheet encapsulation is fixed in one end side edge of supervisor,
While the lower section for being deep into ring-shaped pottery base contacts with screw terminal, on the spring copper sheet it is fluted as connecting terminal, it is another
While in the connection high pressure connection of supervisor foreign side；The motor is used for rotary ceramic fixing axle, controls it to rotate using external circuitses
Angle.
The present invention has the advantages that：
1st, traditional X-ray tube uses thermal excitation scheme, and the launching electronics primary power distribution of filament thermal excitation is also relatively wider, warp
The beam energy issue crossed after accelerating is than wide, therefore it is random to inspire X-ray energy distribution.Photocathode of the invention
Instead of filament, electronic filter system is added, can be good by the electron screening of different-energy, excitation ray monochromaticjty.
2nd, MCP affiliated in the present invention belongs to electron multiplication device, can form big line electron stream, improves ray conversion
Efficiency.
3rd, negative electrode affiliated in the present invention inherently reduces the next influence of noise in the torrid zone and controllable factor is careful, from
Different aspect regulation excites energy, the quantity of electronics, because of the next uncertainty factor of temperature band in change thermal excitation.Photocathode
Modulation is as follows：1. in the case where incident light frequency is certain, saturation photocurrent ImaxSize be directly proportional to the intensity of incident light,
The photoelectron number being knocked off in the namely unit interval is directly proportional to the intensity of incident light.2. photoelectronic maximum just kinetic energy with enter
The intensity for penetrating light is unrelated, and the frequency only with incident light is relevant.Frequency is higher, and photoelectronic energy is bigger.3. incident light
Frequency is less than v0Light, the intensity regardless of light, how long is irradiation time, all without photoelectron emissions.(played out by frequency
Pass act on) 4. light irradiation and it is photoelectronic release almost simultaneously, be usually no more than 10-9Second.(change preheating in thermal excitation
Link, improves efficiency)
4th, magnetic filtering system.Magnetic field allows the system that electron beam enters horizontal deflection.Electron motion side is changed by Lorentz power
Become deflection, referred to as electron energy filter system to electron beam is caused.Obtained by the theoretical of Lorentz power in magnetic field according to electronics
Know, the different electronics stress size of energy is not consistent, if adding a filtration system in electron beam Exit positions, according to meter
Calculate, the deflection of a beam of electrons angle for wanting to pass through is calculated with Exit positions and is filtered through in Exit positions, that is, reach list
The outgoing of one energy electron.
5th, the hot cathode in convention cathode ray tube is instead of using photocathode.Conventional hot-cathode ray tube uses W materials
Material makes element internal electron be changed into free electron effusion metal by thermal excitation as electron emitting cathode by improving temperature
Inside, therefore the life-span of tungsten filament is shorter, typically between 50~200 hours.Heretofore described negative electrode is cloudy photoelectricity
Pole, without carrying out filament pre-heating, and long service life in advance.
6th, overall performance stabilization of the present invention, power is small.
Brief description of the drawings
Fig. 1 is overall structure diagram of the present invention.
Fig. 2 is the structural representation of MCP electron multiplications device 8 in Fig. 1.
Fig. 3 is the enlarged drawing of ceramic case 6 in Fig. 1.
Fig. 4 is enlarged drawing at II in Fig. 1.
Fig. 5 is enlarged drawing at III in Fig. 1.
Fig. 6 is enlarged drawing at IV in Fig. 5.
Fig. 7 is electronic filter grid Anodic target distributing position figure in Fig. 5.
Fig. 8 is operation principle of the present invention and operating circuit schematic diagram.
Reference in figure：1st, overall structure shell；2nd, it is responsible for；3rd, solenoid；4th, special electromagnet；5th, copper rod and electricity
Pole lead；6th, ceramic case；7th, Au cathode constructions；8th, MCP electron multiplications device；9th, square aluminum hull；10th, ultraviolet LED fixture；
11st, ultraviolet LED；12nd, lens fixing shell；13rd, cushion angle；14th, extender lens；15th, jackscrew；16th, high pressure connection；17th, electricity
Machine；18th, fixing axle；19th, electronic filter grid；20th, ring-shaped pottery base；21st, copper anode substrate；22nd, spring copper sheet；23rd, sun
Pole target；24th, round end fixed screw；25、MCP(Φ50)；26th, MCP fixtures；27th, MCP pressure rings A；28th, MCP pressure rings B；29、X
Ray.
Specific embodiment
As shown in accompanying drawing 1：The pulsed homogeneous X-ray pipe includes ray tube main body I, cathode light sources II, electronics beam filter
Mechanism III, the cathode light sources II are arranged on above ray tube main body I, and electron beam filter mechanism III is arranged on ray tube master
One end of body I.
Ray tube main body I:
Wherein, described ray tube main body I includes shell 1, the supervisor 2 being arranged in shell 1, is arranged on 2 taper ends of supervisor
On solenoid 3, be arranged on supervisor 2 taper ends on the side of solenoid 3 electromagnet 4, be arranged on supervisor 2 in ceramic case 6, set
Three copper rods 5 with contact conductor that vertical setting of types in the one end of ceramic case 6 is uniformly arranged, middle copper rod 5-1 passes through shell 1, master
Pipe 2 and ceramic case 6 are connected with Au cathode constructions 7, and Au negative electrodes 7-2, the ceramic case are provided with the negative electrode annular outer cover 7-1
MCP electron multiplications device 8 is additionally provided with 6.
MCP structures：
As shown in accompanying drawing 2：The MCP electron multiplications device 8 is solid by MCP (Φ 50) 25, the MCP being arranged on outside MCP25
The MCP pressure ring A27 and MCP pressure rings B 28 for determine part 26, being arranged on MCP25 both sides is constituted.If applying on MCP pressure rings A27 certain
Magnitude of voltage, the electrons of Au negative electrodes 7-2 effusions fly to the surface of MCP (Φ 50) 25 by electric field acceleration.25 points of MCP (Φ 50)
Be foreboard voltage and back plate voltage, it is different according to front and rear panel applied voltage, there is pressure difference so that electron beam by gain and acceleration,
Below, the gain electron amount of outgoing can reach 10 before gain5Times.High density electron beam is realized, Guan Liu great is improve
It is small.
MCP pressure rings A27 on described MCP electron multiplications device 8 is connected by contact conductor A with upper copper rod 5-2, MCP
Pressure ring B28 is connected by contact conductor B with lower copper rod 5-3.
Au cathode constructions：
As shown in accompanying drawing 3：In described Au cathode constructions 7, Au negative electrodes 7-2 is installed on cathode loop by metal ring trim ring
Inside shape shell 7-1, contact conductor from negative electrode annular outer cover 7-1 inside draw be fixed on middle copper rod 5-1 and with Au negative electrodes
7-2 is connected；Described ceramic case 6 is shaped as semienclosed six face cube structure, adjacent two sides perforate, wherein 6-1
Hole as light source incidence end, 6-2 holes are worn as electron beam exit end, the middle copper rod 5-1 being connected with negative electrode annular outer cover 7-1
It is an entirety to cross ceramic case 6 and be connected thereto.
Solenoid：
The electron beam aggregation infrastructure of the solenoid 3, coiling length is L, internal diameter is D, be enclosed in the taper end of ray tube main body I
Close to MCP electron multiplications device 8, two sections of 3 pin of solenoid connects electric power system makes solenoid inside produce magnetic field, direction and electricity
The beamlet direction of motion is parallel, is found when being moved by simulation electronic parallel magnetic field, and it is spirality that electronics is movement locus, according to applying
Plus magnetic field intensity it is different, the track of electronic deflection is also different, so when reaching certain value according to the magnetic field that such feature applies,
Can be converged just horizontal deflection is entered from MCP back plate outgoing electron beams, play and the direction effect of contraction of outgoing electron beam (is gathered herein
Burnt mode is magnetic focusing, can also change into electrofocusing).
Electromagnet：
Described electromagnet 4 is arranged on the both sides up and down of the taper end of ray tube main body I by U-shaped fixture, is mutually perpendicular to, right
Spacing between face opposite polarity, two blocks of special electromagnet 4 is D, and D is the taper end diameter of ray tube main body I, and magnetic field range length is L,
Intensity is T, the external electric power system of supply lines that the electromagnet 4 is drawn.Special electromagnetism special 4 is parallel to be distributed in up and down the two of supervisor
End, produces a vertical magnetic field region by N to S, this region to be separated different-energy electron beam in pipe, due to
Magnetic field is unidirectional constant stationary magnetic field, then electron beam is only subject to Lorentz power, it is assumed that ignore interelectric interaction, temporarily
Do not consider electric field acceleration.Lorentz power suffered by electron beam：
F=-ev (k) × B
E is electronics in formula, and v is speed, and effect of the magnetic field to electronics is different with electric field, and its not work done does not change electronics
Energy.Special magnet in the present invention applies a power using Lorentz power in electron beam vertical direction, by changing the big of it
The small size to change beam motion radius R.Understood according in classical mechanics.Radius of gyration R：Charged particle is in uniform magnetic field
In only by Lorentz power when doing uniform circular motion, Lorentz power serves as centripetal force, it is possible thereby to derive that the circumference is transported
Dynamic radius formula：
In formula, m is electron mass, and q is electron charge.Because the direction of Lorentz power is perpendicularly to the direction of movement, then simultaneously
The energy (kinetic energy) of electron beam is not changed.Deflection angle：After electron beam enters injects magnetic field, if deflection angle is α, according to public affairs
Formula is learnt：
In formula, L is length of magnetic field, and electron beam incidence rate is changed here to change radius, that is, change deflection angle big
It is small.The length in magnetic field can be calculated by formula.Because incident electron primary power is inconsistent, i.e. v is different, causes
Electron motion radius R is different.In motion process in magnetic field, it may appear that amplitude it is inconsistent.Above-mentioned technology is referred to as electromagnetic electronic
Beam screens structure, and the electronics of different-energy in electron beam is carried out convergence distribution by it, the electronics for making energy more identical or approximate
Beam is distributed in a certain focal spot interval (relevant with the filter bores size of electronic filter grid in C 19), so, in the certain feelings of anode voltage
Under condition, R is identical for its moving radius of the electron beam of same energy, so, it is single by the beam energy obtained after screening.
Cathode light sources II：
As shown in accompanying drawing 4：Described cathode light sources II are including square aluminum hull 9, by the side of being arranged on of ultraviolet LED fixture 10
Ultraviolet LED 11 in shape aluminum hull 9, the lens fixing shell 12 being arranged on below square aluminum hull 9, by jackscrew 15 and cushion angle
13 are arranged on the extender lens 14 in lens fixing shell 12；Wherein described square aluminum shell 9 fixes outer for the installation of ultraviolet LED 11
Shell, plays the thermolysis for preventing ultraviolet radiation and pipe, and extender lens 14 is arranged on the lower section of the exit portal of ultraviolet LED 11, preceding
Position can control ultraviolet optical focus in the position of negative electrode with jackscrew 15 is installed as micro-adjusting mechanism afterwards, adjust outgoing electron beam angle
Degree；Cathode light sources II are used as a top of Au cathode constructions 7 for being integrally attached to ray tube main body I.From the conduct of ultraviolet LED 11
Excitation source, it can make the pulse-like light source irradiation Au cathode constructions 7 of a kind of frequency, adjustable pulse width, by with certain
During the light irradiation Au negative electrode 7-2 of frequency, photoelectric effect can be produced.Potential barrier is overcome to escape metal by the electronics inside Au negative electrodes 7-2
Surface, so as to form free electron in metal surface, service life will be significantly larger than filament.
Electron beam filter mechanism III：
As shown in accompanying drawing 5,6,7：In order to ensure single energy electron beam outgoing, one is set in one end of ray tube main body I
Individual electron beam filter mechanism III, the electron beam filter mechanism III includes high pressure connection 16, the spring copper of connection high pressure connection 16
Piece 22, be arranged on supervisor 2 taper end axis line positions fixing axle 18, be arranged on supervisor 2 fixing axles 18 on electronic filter grid 19
With ring-shaped pottery base 20, the copper anode substrate 21 being uniformly arranged on ring-shaped pottery base 20, be arranged on copper anode serve as a contrast
The anode target material 23 on the top of bottom 21, the round end fixed screw 24 for being connected to the other end of copper anode substrate 21, it is connected to fixing axle
The motor 17 of 18 outer ends.The electronic filter grid 19 and ring-shaped pottery base 20 are concentric co-axial structure, and by three copper sun
Pole substrate 21 is fixed on ring-shaped pottery base 20, mutual angle is 120 degree, the position of opening on electronic filter grid 19 and three
The individual position of copper anode substrate 21 corresponds, and controls rotation overall structure to select target by motor 17.Electronics beam filter knot
Structure is referred to as electron beam filtration system with above-mentioned electromagnetic electronic beam screening structure.
The electronic filter grid 19 be circular discs, relevant position (the filtering electronic beam Exit positions) perforate on disk, as
Electron beam emergent light is blocked, and pore size determines focal spot size；Three identical copper anode substrates are set in technical solution of the present invention
21, the copper anode substrate 21 is cylindrical structural, upper end is deposited with face with tapered ramp 21-1 as anode material, respectively
By Mg, Cr, W element evaporation on the surface of tapered ramp 21-1, the lower end of copper anode substrate 21 is the cylinder with screw pedestal
Shape is used, is screwed on ring-shaped pottery base 20；The ring-shaped pottery base 20 is the fixation of copper anode substrate 21
Base, center ceramics fixing axle is fixed with electronic filter grid center, and target is corresponded with perforate；The envelope of the spring copper sheet 22
Dress is fixed in the side edge of supervisor 2, while the lower section for being deep into ring-shaped pottery base 20 contacts with screw terminal, the spring copper
It is fluted on piece 22 to be responsible for 2 foreign sides connection high pressure as connecting terminal, another side；The motor 17 is fixed for rotary ceramic
Axle 18, its anglec of rotation is controlled using external circuitses, is packaged in inside supervisor 2.
The present invention is filtered by adjusting high pressure and magnetic field to electron beam, and the electron beam after filtering clashes into target.Target
Material can be inspired the X-ray of different wavelength range under the exciting of high-energy electron, and wave-length coverage is small, the list of outgoing
Color X-ray intensity is strong.
Circuit：
Described X-ray control circuit is as shown in Figure 8：Cathode light sources II is supplied it by external Special pulse modulation power source U1
Electricity；U2 is Au negative electrode supply voltages, and voltage is added on copper rod 5-1, is connected with Au negative electrodes 7-2 by contact conductor；U3 is helical
Pipe 3, U4 is the supply voltage of special electromagnet 4；Ug represents the high-voltage power voltage for being connected on high pressure connection 16, outside high pressure connection 16
Meet positive high voltage Ug=10~50kV；Umcp1It is voltage before MCP, voltage is added on copper rod 5-2, is pressed by contact conductor and MCP
Ring A27 is connected；Umcp2It is voltage behind MCP, voltage is added on copper rod 5-1, is connected with MCP pressure rings A28 by contact conductor.
The above, preferably specific embodiment only of the invention, these embodiments are only in order at the mesh of explanation
, and do not limit the scope of the invention and essence.
Claims (6)
1. a kind of pulsed homogeneous X-ray pipe, it is characterised in that：The pulsed homogeneous X-ray pipe includes ray tube main body I, the moon
Aurora source II, electron beam filter mechanism III, the cathode light sources II are arranged on above ray tube main body I, electron beam filter
Structure III is arranged on one end of ray tube main body I；
Wherein, described ray tube main body I includes shell (1), the supervisor (2) being arranged in shell (1), is arranged on supervisor (2)
Solenoid (3) in taper end, be arranged on the electromagnet (4) of solenoid (3) side in supervisor (2) taper end, be arranged on supervisor (2) in
Ceramic case (6), be arranged on three copper rods (5) with contact conductor of the uniform arrangement of the vertical setting of types of ceramic case (6) one end, it is middle
Copper rod (5-1) is connected through shell (1), supervisor (2) and ceramic case (6) with Au cathode constructions (7), the Au cathode constructions (7)
It is made up of negative electrode annular outer cover (7-1) and Au negative electrodes (7-2), MCP electron multiplication devices is additionally provided with the ceramic case (6)
(8), the MCP electron multiplications device (8) by MCP (25), the MCP fixtures (26) being arranged on outside MCP (25), be arranged on
MCP pressure rings A (27) and MCP pressure rings B (28) of MCP (25) both sides are constituted；
Described cathode light sources II are included square aluminum hull (9), are arranged on by ultraviolet LED fixture (10) in square aluminum hull (9)
Ultraviolet LED (11), be arranged on the following lens fixing shell (12) of square aluminum hull (9), by jackscrew (15) and cushion angle
(13) it is arranged on the extender lens (14) in lens fixing shell (12)；Wherein described square aluminum shell (9) is ultraviolet LED (11)
Fixing shell is installed, the thermolysis for preventing ultraviolet radiation and ultraviolet LED (11) is played, extender lens (14) is installed in ultraviolet
The lower section of LED (11) exit portal, front and back position with install jackscrew (15) as micro-adjusting mechanism, controllable ultraviolet light expand after in the moon
The shadow surface position of pole, adjusts outgoing electron beam position；Cathode light sources II are used as an Au for being integrally attached to ray tube main body I
Cathode construction (7) top；
The electron beam filter mechanism III includes high pressure connection (16), the spring copper sheet (22) of connection high pressure connection (16), sets
In the fixing axle (18) for being responsible for (2) taper end axis line position, the electronic filter grid (19) being arranged on supervisor (2) fixing axle (18)
With ring-shaped pottery base (20), the copper anode substrate (21) being uniformly arranged on ring-shaped pottery base (20), be arranged on copper
The anode target material (23) on anode substrate (21) top, the round end fixed screw for being connected to copper anode substrate (21) other end
(24), it is connected to the motor (17) of fixing axle (18) outer end；The electronic filter grid (19) and ring-shaped pottery base (20) are same
Heart coaxial configuration, and three copper anode substrates (21) are fixed on ring-shaped pottery base (20), mutual angle is 120
Degree, position of opening and three copper anode substrate (21) positions on electronic filter grid (19) are corresponded, by motor (17)
Control rotation overall structure selection target.
2. a kind of pulsed homogeneous X-ray pipe according to claim 1, it is characterised in that：Described Au cathode constructions (7)
In, Au negative electrodes (7-2) are installed on negative electrode annular outer cover (7-1) inside by metal ring trim ring, and contact conductor is annular from negative electrode
Drawn inside shell (7-1) and be fixed on middle copper rod (5-1) and be connected with Au negative electrodes (7-2)；The shape of described ceramic case (6)
Shape be semienclosed six face cube structure, adjacent two sides perforate, its mesopore (6-1) as light source incidence end, hole (6-
2) as electron beam exit end, the middle copper rod (5-1) being connected with negative electrode annular outer cover (7-1) through ceramic case (6) and and its
It is connected as an entirety.
3. a kind of pulsed homogeneous X-ray pipe according to claim 1, it is characterised in that：Described MCP electron multipliers
MCP pressure rings A (27) on part (8) are connected by contact conductor A with upper copper rod (5-2), MCP pressure rings B (28) are by contact conductor B
It is connected with lower copper rod (5-3).
4. a kind of pulsed homogeneous X-ray pipe according to claim 1, it is characterised in that：The winding of the solenoid (3)
Length is that L, internal diameter are D, are enclosed in the taper end of ray tube main body I close to MCP electron multiplications device (8), solenoid (3) pin
Two sections connect electric power system and solenoid inside is produced magnetic field, and direction is parallel with beam motion direction, plays to outgoing electron beam
Direction constraint.
5. a kind of pulsed homogeneous X-ray pipe according to claim 1, it is characterised in that：Described electromagnet (4) passes through
U-shaped fixture is arranged on the both sides up and down of the taper end of ray tube main body I, is mutually perpendicular to, opposite opposite polarity, two blocks of special electromagnet
(4) spacing between is D, and D is the taper end diameter of ray tube main body I, and magnetic field range length is L, and intensity is T, and the electromagnet (4) is drawn
The external electric power system of supply lines for going out.
6. a kind of pulsed homogeneous X-ray pipe according to claim 1, it is characterised in that：The electronic filter grid (19)
It is circular discs, the filtering electronic beam Exit positions perforate on disk is blocked as electron beam emergent light；The ring-shaped pottery base (20)
Three identical copper anode substrates (21) of upper setting, the copper anode substrate (21) is cylindrical structural, upper end is with wedge shape
Inclined-plane (21-1) is deposited with face as anode material, respectively by Mg, Cr, W element evaporation on the surface of tapered ramp (21-1), copper
Anode substrate (21) end processed is the cylinder with screw pedestal, is screwed on ring-shaped pottery base (20)；The ring
Shape ceramic base (20) is the firm banking of copper anode substrate (21), and center is consolidated with ceramic fixing axle and electronic filter grid center
It is fixed；Spring copper sheet (22) encapsulation is fixed in one end side edge of supervisor (2), while being deep into ring-shaped pottery base (20)
Lower section contacted with screw terminal, on the spring copper sheet (22) it is fluted as connecting terminal, another side supervisor (2) foreign side connect
Connect high pressure connection (16)；The motor (17) controls its anglec of rotation for rotary ceramic fixing axle (18) using external circuitses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610044852.XA CN105513930B (en) | 2015-11-05 | 2016-01-22 | Pulsed homogeneous X-ray pipe |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510743654.8A CN105206489A (en) | 2015-11-05 | 2015-11-05 | Impulse type monochromatic X ray tube |
| CN2015107436548 | 2015-11-05 | ||
| CN201610044852.XA CN105513930B (en) | 2015-11-05 | 2016-01-22 | Pulsed homogeneous X-ray pipe |
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| CN105513930A CN105513930A (en) | 2016-04-20 |
| CN105513930B true CN105513930B (en) | 2017-05-31 |
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| CN201510743654.8A Pending CN105206489A (en) | 2015-11-05 | 2015-11-05 | Impulse type monochromatic X ray tube |
| CN201610044852.XA Expired - Fee Related CN105513930B (en) | 2015-11-05 | 2016-01-22 | Pulsed homogeneous X-ray pipe |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510743654.8A Pending CN105206489A (en) | 2015-11-05 | 2015-11-05 | Impulse type monochromatic X ray tube |
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| US10499484B2 (en) * | 2017-11-16 | 2019-12-03 | Moxtek, Inc. | X-ray source with non-planar voltage multiplier |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5576549A (en) * | 1994-07-20 | 1996-11-19 | Siemens Aktiengesellschaft | Electron generating assembly for an x-ray tube having a cathode and having an electrode system for accelerating the electrons emanating from the cathode |
| US7085351B2 (en) * | 2000-10-06 | 2006-08-01 | University Of North Carolina At Chapel Hill | Method and apparatus for controlling electron beam current |
| CN1992141A (en) * | 2000-10-06 | 2007-07-04 | 北卡罗来纳-查佩尔山大学 | X-ray generating mechanism using electron field emission cathode |
| CN205657040U (en) * | 2015-11-05 | 2016-10-19 | 长春理工大学 | Pulsed homogeneous X -ray pipe |
-
2015
- 2015-11-05 CN CN201510743654.8A patent/CN105206489A/en active Pending
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5576549A (en) * | 1994-07-20 | 1996-11-19 | Siemens Aktiengesellschaft | Electron generating assembly for an x-ray tube having a cathode and having an electrode system for accelerating the electrons emanating from the cathode |
| US7085351B2 (en) * | 2000-10-06 | 2006-08-01 | University Of North Carolina At Chapel Hill | Method and apparatus for controlling electron beam current |
| CN1992141A (en) * | 2000-10-06 | 2007-07-04 | 北卡罗来纳-查佩尔山大学 | X-ray generating mechanism using electron field emission cathode |
| CN205657040U (en) * | 2015-11-05 | 2016-10-19 | 长春理工大学 | Pulsed homogeneous X -ray pipe |
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| CN105513930A (en) | 2016-04-20 |
| CN105206489A (en) | 2015-12-30 |
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