CN105513930A - Pulse type single-color X-ray tube - Google Patents
Pulse type single-color X-ray tube Download PDFInfo
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- CN105513930A CN105513930A CN201610044852.XA CN201610044852A CN105513930A CN 105513930 A CN105513930 A CN 105513930A CN 201610044852 A CN201610044852 A CN 201610044852A CN 105513930 A CN105513930 A CN 105513930A
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J35/00—X-ray tubes
- H01J35/02—Details
- H01J35/14—Arrangements for concentrating, focusing, or directing the cathode ray
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- 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 invention relates to a pulse type single-color X-ray tube. The pulse type single-color X-ray tube comprises a ray tube body I, a cathode light source II and an electron beam filtering mechanism III. The cathode light source II is arranged on the ray tube body I, and the electron beam filtering mechanism III is arranged at one end of the ray tube body I. The pulse type single-color X-ray tube can screen electrons with different energy values, excitation ray monochromaticity is good, ray conversion efficiency is improved, the service life is long, overall performance is stable, and power is low.
Description
Technical field
The present invention relates to a kind of novel monochromatic X-ray source, specifically a kind of pulsed homogeneous X-ray pipe, be mainly applied to the imaging of X ray characteristic spectrum and X-ray fluorescence spectra detection.
Background technology
It is short that X ray has wavelength, the feature that penetration capacity is strong, is widely used in field of non destructive testing up to now, comprises imaging flaw detection, spectral detection etc.
X-ray imaging technology, utilizes the feature that X ray penetration capacity is strong exactly, and it can penetrating material varying in size according to the mass-absorption coefficient of penetrating material, realizes the noninvasive imaging to internal structure of body by the attenuation degree of detecting x-ray.X ray Dynamic Non-Destruction Measurement industrially has a very wide range of applications, and it both can be used for metal detection, also for nonmetal detection.To the defect that interiors of products produces in the mill, as bubble, foreign matter impurity, crackle, segregation, solder joint etc. all can utilize ray to detect.The industry of application has electronic device industry, Aero-Space, automobile making, war industry, precision equipment etc.
X ray spectral technique, utilize radiation exposure sample, different according to Atom of Elements, the fluorescent X-ray energy inspired after illuminated is also different, different ray energy intensity is measured respectively, for the qualitative and quantitative analysis to material element by the reception of detector.
In X ray Non-Destructive Testing now, adopt Coolidge tube as source, belong to hot cathode excitation electron.The disadvantage of this negative electrode is adopted to be the randomness of thermal excitation, temperature is higher, the quantity of electronics effusion metal is more, but due to cathode shape, be heated uneven, initial electron energy uncertainty etc., the free electron that makes to overflow near filament is in a kind of stochastic regime, this is also in secondary X-ray detection, the principal element of sensitive detection parts random noise, pulsed X-ray tube, initiating electron beam energy is changed from negative electrode, namely the energy range of electronic impact target is constrained, improve the unicity in emergent ray source, when X ray excited by detecting after thing, no matter imaging or fluorescence spectrum detect, ray energy is evenly distributed, fundamentally background noise is reduced from sending out.
Summary of the invention
For solving the problems referred to above that prior art exists, the invention provides a kind of pulsed homogeneous X-ray pipe, this pulsed homogeneous X-ray pipe can to the electron screening of different-energy, excitation ray monochromaticjty is good, and ray conversion efficiency improves, long service life, overall performance is stablized, and power is little.
Technical solution of the present invention is as follows: this pulsed homogeneous X-ray pipe comprises ray tube main body, cathode light sources, electron beam filter mechanism, and described cathode light sources is arranged on above ray tube main body, and electron beam filter mechanism is arranged on one end of ray tube main body.
Wherein, described ray tube main body comprises shell, supervisor is in the enclosure set, be arranged on the solenoid in supervisor's taper end, be arranged on the electromagnet of solenoid side in supervisor's taper end, be arranged on the ceramic case in supervisor, be arranged on three copper rods with contact conductor of the uniform arrangement of vertical setting of types of ceramic case one end, the copper rod of described centre is through shell, supervisor is connected with Au cathode construction with ceramic case, described Au cathode construction is made up of negative electrode annular outer cover and Au negative electrode, described ceramic case is also provided with MCP electron multiplication device, described MCP electron multiplication device is by MCP (Φ 50), be arranged on the MCP fixture outside MCP, the MCP pressure ring A and the MCP pressure ring B that are arranged on MCP both sides are formed.
In described Au cathode construction, Au negative electrode is installed on negative electrode annular enclosure by metal ring trim ring, and contact conductor is drawn from negative electrode annular enclosure and is fixed on middle copper rod and is connected with Au negative electrode; The shape of described ceramic case is semienclosed six cube structures, adjacent two sides perforate, its mesopore is as the incidence end of light source, and hole is as electron beam exit end, and the described middle copper post be connected with negative electrode annular outer cover passes ceramic case and is connected with it as a whole.
MCP pressure ring A on described MCP electron multiplication device is connected with upper copper rod by contact conductor A, MCP pressure ring B is connected with lower copper rod by contact conductor B.
Described solenoidal coiling length is L, internal diameter is D, be enclosed in the taper end of ray tube main body close to MCP electron multiplication device, solenoid pin two sections connects electric power system makes solenoid inside produce magnetic field, direction is parallel with beam motion direction, plays the direction constrain to outgoing electron bundle;
Two blocks of described special electromagnet are arranged on the both sides up and down of ray tube main body taper end by U-shaped fixture, mutually vertical, opposite polarity is contrary, spacing between two blocks of special electromagnet is D, D is ray tube main body taper end diameter, magnetic field range length is L, and intensity is T, the external electric power system of supply lines that described electromagnet is drawn.
Described cathode light sources comprises square aluminum hull, the ultraviolet LED be arranged on by ultraviolet LED fixture in square aluminum hull, be arranged on lens fixed housing below square aluminum hull, the extender lens be arranged on by jackscrew and cushion angle in lens fixed housing; Wherein said square aluminum hull is the installation fixed housing of ultraviolet LED, play the thermolysis preventing ultraviolet radiation and ultraviolet LED, extender lens is arranged on the below of ultraviolet LED exit portal, front and back position is with installing jackscrew as micro-adjusting mechanism, the position of ultraviolet light focus at negative electrode can be controlled, adjustment outgoing electron beam angle degree; Cathode light sources is integrally fixed on above the negative electrode of ray tube main body.
In order to ensure single energy electronic beam outgoing, an electron beam filter mechanism is set in one end of ray tube body interior, described electron beam filter mechanism III comprises high pressure connection, connect the spring copper sheet of high pressure connection, be arranged on the fixed axis of supervisor position, taper end axis, be arranged on the electronic filter grid on supervisor's fixed axis and ring-shaped pottery base, the uniform copper anode substrate be arranged on ring-shaped pottery base, be arranged on the anode target material on copper anode substrate top, be connected to the round end fixed screw of the copper anode substrate other end, be connected to the motor of fixed axis outer end.Described electronic filter grid and ring-shaped pottery base are concentric co-axial structure, and three copper anode substrates to be fixed on ring-shaped pottery base, each other angle be 120 degree, position of opening on electronic filter grid and three copper anode substrate location one_to_one corresponding, by Electric Machine Control rotary integral structure choice target.
Described electronic filter grid are circular discs, and relevant position (filtering electronic bundle Exit positions) perforate on dish, blocks as electron beam emergent light, and pore size determines focal spot size and the energy range of electron beam; Three identical copper anode substrates are set in technical solution of the present invention, described copper anode substrate be cylindrical structural, upper end with tapered ramp as anode material evaporation face, respectively by Mg, Cr, W element evaporation on the surface of tapered ramp, copper anode substrate lower end be band screw pedestal cylindrical, be screwed on ring-shaped pottery base; Described ring-shaped pottery base is the firm banking of copper anode substrate, and center ceramic fixed axis and electronic filter grid center are fixed; The encapsulation of described spring copper sheet is fixed in one end side edge of supervisor, and the below being deep into ring-shaped pottery base contacts with screw terminal, flutedly on described spring copper sheet is being responsible for foreign side's connection high pressure connection as connecting terminal, another side; Described motor is used for rotary ceramic fixed axis, utilizes external circuits to control its anglec of rotation.
The present invention has the following advantages and good effect:
1, traditional X-ray light pipe adopts thermal excitation scheme, and the electron emission primary power distribution of filament thermal excitation is also relatively wider, and the electron beam energy after accelerating is issued relatively more extensive, therefore inspires X-ray energy distribution random.Photocathode of the present invention replaces filament, adds electronic filter system, can by the electron screening of different-energy, and excitation ray monochromaticjty is good.
2, the MCP belonging in the present invention belongs to electron multiplication device, can form large line electron stream, improve ray conversion efficiency.
3, the negative electrode belonging in the present invention inherently reduce the noise effect that comes in the torrid zone and also controllable factor careful, regulate energy, the quantity of excitation electron from different aspect, change the uncertainty factor that in thermal excitation, Yin Wendu brings.Photocathode modulation is as follows: 1. when incident light frequency is certain, saturation photocurrent I
maxsize be directly proportional to the intensity of incident light, be namely directly proportional to the intensity of incident light by the photoelectron number hit in the unit interval.2. the intensity of photoelectronic maximum just kinetic energy and incident light has nothing to do, and only relevant with the frequency of incident light.Frequency is higher, and photoelectronic energy is larger.3. the frequency of incident light is lower than v
0light, regardless of the intensity of light, irradiation time is how long, does not all have photoelectron emissions.(playing on-off action by frequency) 4. the irradiation of light and photoelectronic release is almost simultaneously, is generally no more than 10
-9second.(change preheating link in thermal excitation, raise the efficiency)
4, magnetic filtering system.Magnetic field allows electron beam carry out the system deflected.Changing electron motion direction by Lorentz power makes electron beam become deflection, is called electron energy filter system.Learn by the theory of Lorentz power in magnetic field according to electronics, the stressed size of electronics that energy is different is also inconsistent, if add a filtration system at electron beam Exit positions, according to calculating, the deflection of a beam of electrons angle wanting to pass through and Exit positions are calculated and be filtered through at Exit positions, namely reaches the outgoing of single energy electronics.
5, photocathode is utilized to instead of hot cathode in convention cathode ray tube.Conventional hot-cathode ray tube adopt be W material as electron emitting cathode, by improve temperature make element internal electron be subject to thermal excitation and become free electron effusion metal inside, therefore the life-span of tungsten filament is shorter, generally between 50 ~ 200 hours.Negative electrode described in the present invention is photocathode, without the need to carrying out filament pre-heating in advance, and long service life.
6, overall performance of the present invention is stablized, and power is little.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present invention.
Fig. 2 is the structural representation of MCP electron multiplication device 8 in Fig. 1.
Fig. 3 is the enlarged drawing of ceramic case 6 in Fig. 1.
Fig. 4 is II place enlarged drawing in Fig. 1.
Fig. 5 is III place enlarged drawing in Fig. 1.
Fig. 6 is IV place enlarged drawing 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 numeral in figure: 1, overall structure shell; 2, be responsible for; 3, solenoid; 4, special electromagnet; 5, copper rod and contact conductor; 6, ceramic case; 7, Au cathode construction; 8, MCP electron multiplication device; 9, square aluminum hull; 10, ultraviolet LED fixture; 11, ultraviolet LED; 12, lens fixed housing; 13, cushion angle; 14, extender lens; 15, jackscrew; 16, high pressure connection; 17, motor; 18, fixed axis; 19, electronic filter grid; 20, ring-shaped pottery base; 21, copper anode substrate; 22, spring copper sheet; 23, anode target material; 24, round end fixed screw; 25, MCP (Φ 50); 26, MCP fixture; 27, MCP pressure ring A; 28, MCP pressure ring B; 29, X ray.
Embodiment
Shown in accompanying drawing 1: this pulsed homogeneous X-ray pipe comprises ray tube main body I, cathode light sources II, electron beam filter mechanism III, described cathode light sources II is arranged on above ray tube main body I, and electron beam filter mechanism III is arranged on one end of ray tube main body I.
Ray tube main body I:
Wherein, described ray tube main body I comprises shell 1, the supervisor 2 be arranged in shell 1, the solenoid 3 be arranged in supervisor 2 taper end, the electromagnet 4 being arranged on solenoid 3 side in supervisor 2 taper end, the ceramic case 6 be arranged in supervisor 2, be arranged on three copper rods 5 with contact conductor of the uniform arrangement of vertical setting of types of ceramic case 6 one end, the copper rod 5-1 of described centre is connected with Au cathode construction 7 with ceramic case 6 through shell 1, supervisor 2, be provided with Au negative electrode 7-2 in described negative electrode annular outer cover 7-1, described ceramic case 6 be also provided with MCP electron multiplication device 8.
MCP structure:
Shown in accompanying drawing 2: described MCP electron multiplication device 8 by MCP (Φ 50) 25, be arranged on the MCP fixture 26 outside MCP25, the MCP pressure ring A27 being arranged on MCP25 both sides and MCP pressure ring B28 and form.If apply certain magnitude of voltage on MCP pressure ring A27, the electrons that Au negative electrode 7-2 overflows flies to the surface of MCP (Φ 50) 25 through electric field acceleration.MCP (Φ 50) 25 is divided into header board voltage and rear plate voltage, applies voltage different, there is pressure reduction, make electron beam by gain and acceleration according to front and rear panel, and below, the gain electron amount of outgoing can reach 10 before gain
5doubly.Achieve high density electron beam, improve pipe stream size.
MCP pressure ring A27 on described MCP electron multiplication device 8 is connected with upper copper rod 5-2 by contact conductor A, MCP pressure ring B28 is connected with lower copper rod 5-3 by contact conductor B.
Au cathode construction:
Shown in accompanying drawing 3: in described Au cathode construction 7, it is inner that Au negative electrode 7-2 is installed on negative electrode annular outer cover 7-1 by metal ring trim ring, and contact conductor is drawn from negative electrode annular outer cover 7-1 inside and is fixed on middle copper rod 5-1 and is connected with Au negative electrode 7-2; The shape of described ceramic case 6 is semienclosed six cube structures, adjacent two sides perforate, wherein 6-1 hole is as the incidence end of light source, 6-2 hole is as electron beam exit end, and the described middle copper post 5-1 be connected with negative electrode annular outer cover 7-1 passes ceramic case 6 and is connected with it as a whole.
Solenoid:
Described solenoid 3 electron beams converge structure, coiling length is L, internal diameter is D, be enclosed in the taper end of ray tube main body I close to MCP electron multiplication device 8, solenoid 3 pin two sections connects electric power system makes solenoid inside produce magnetic field, direction is parallel with beam motion direction, find when being moved by simulation electronic parallel magnetic field, electronics is movement locus is spirality, different according to the magnetic field intensity applied, the track of electronic deflection is also different, so when the magnetic field applied according to this type of feature reaches certain value, can converge just deflecting from plate outgoing electron Shu Jinhang after MCP, (type of focusing is magnetic focusing herein in the direction constrain effect playing outgoing electron bundle, also electrofocusing can be changed into).
Electromagnet:
Described two blocks special electromagnet 4 are arranged on the both sides up and down of ray tube main body I taper end by U-shaped fixture, mutually vertical, opposite polarity is contrary, spacing between two blocks of special electromagnet 4 is D, D is ray tube main body I taper end diameter, magnetic field range length is L, and intensity is T, the external electric power system of supply lines that described electromagnet 4 is drawn.The special 4 parallel two ends being up and down distributed in supervisor of special electromagnetism, in pipe, generation one is by the vertical magnetic field region of N to S, different-energy electron beam can be separated by this region, because magnetic field is unidirectional constant stationary magnetic field, then electron beam is only subject to Lorentz power, suppose to ignore interelectric interaction, put aside electric field acceleration.Lorentz power suffered by electron beam:
F＝-ev(k)×B
In formula, e is electronics, and v is speed, and the effect of magnetic field to electronics is different with electric field, and its not work done does not change the energy of electronics.Special magnet in the present invention utilizes Lorentz power to apply a power in electron beam vertical direction, is changed the size of beam motion radius R by the size changing it.According to known in classical mechanics.Radius of gyration R: when charged particle only does uniform circular motion by Lorentz power in uniform magnetic field, Lorentz power serves as centripetal force, can derive the radius formula of this circular motion thus:
In formula, m is electron mass, and q is electron charge.Because the direction of Lorentz power is perpendicular to the direction of motion, then do not change the energy (kinetic energy) of electron beam.Deflection angle: after electron beam enters to inject magnetic field, if deflection angle is α, learn according to formula:
In formula, L is length of magnetic field, changes electron beam incidence rate here and changes radius, namely change deflection angle size.The length in magnetic field can be drawn by formulae discovery.Because incident electron primary power is inconsistent, namely v is different, causes some electron motion radius Rs different.In magnetic field in motion process, there will be the inconsistent of amplitude.Above-mentioned technology is called electromagnetic electronic bundle screening structure, the electronics of different-energy in electron beam is carried out convergence distribution by it, the Beam distribution making energy comparatively identical or approximate is interval at a certain focal spot (relevant with electronic filter grid 19 filter bores size in C), like this, when anode voltage is certain, R is identical for its moving radius of the electron beam of same energy, so the electron beam energy obtained after screening is single.
Cathode light sources II:
Shown in accompanying drawing 4: described cathode light sources II comprises square aluminum hull 9, the ultraviolet LED 11 be arranged on by ultraviolet LED fixture 10 in square aluminum hull 9, be arranged on lens fixed housing 12 below square aluminum hull 9, the extender lens 14 be arranged on by jackscrew 15 and cushion angle 13 in lens fixed housing 12; Wherein said square aluminum hull 9 is the installation fixed housing of ultraviolet LED 11, play the thermolysis preventing ultraviolet radiation and pipe, extender lens 14 is arranged on the below of ultraviolet LED 11 exit portal, front and back position is with installing jackscrew 15 as micro-adjusting mechanism, the position of ultraviolet light focus at negative electrode can be controlled, adjustment outgoing electron beam angle degree; Cathode light sources II is integrally fixed on above the negative electrode 7 of ray tube main body I.Select ultraviolet LED 11 as excitation source, it can make the pulse-like light source irradiation Au cathode construction 7 of a kind of frequency, adjustable pulse width, during by penetrating Au negative electrode 7-2 with the illumination of certain frequency, can produce photoelectric effect.Overcome potential barrier effusion metal surface by the electronics of Au negative electrode 7-2 inside, thus form free electron in metal surface, useful life will far away higher than filament.
Electron beam filter mechanism III:
By accompanying drawing 5, 6, shown in 7: in order to ensure single energy electronic beam outgoing, an electron beam filter mechanism III is set in one end of ray tube main body I, described electron beam filter mechanism III comprises high pressure connection 16, connect the spring copper sheet 22 of high pressure connection 16, be arranged on the fixed axis 18 of position, supervisor 2 taper end axis, be arranged on the electronic filter grid 19 on supervisor 2 fixed axis 18 and ring-shaped pottery base 20, the uniform copper anode substrate 21 be arranged on ring-shaped pottery base 20, be arranged on the anode target material 23 on copper anode substrate 21 top, be connected to the round end fixed screw 24 of copper anode substrate 21 other end, be connected to the motor 17 of fixed axis 18 outer end.Described electronic filter grid 19 are concentric co-axial structure with ring-shaped pottery base 20, and three copper anode substrates 21 to be fixed on ring-shaped pottery base 20, each other angle be 120 degree, position of opening on electronic filter grid 19 and three copper anode substrate 21 position one_to_one corresponding, control rotary integral structure choice target by motor 17.Electron beam filtration and above-mentioned electromagnetic electronic bundle screen structure and are called electron beam filtration system.
Described electronic filter grid 19 are circular discs, and relevant position (filtering electronic bundle Exit positions) perforate on dish, blocks as electron beam emergent light, and pore size determines focal spot size; Three identical copper anode substrates 21 are set in technical solution of the present invention, described copper anode substrate 21 be cylindrical structural, upper end with tapered ramp 21-1 as anode material evaporation face, respectively by Mg, Cr, W element evaporation on the surface of tapered ramp 21-1, copper anode substrate 21 lower end be band screw pedestal cylindrical use, be screwed on ring-shaped pottery base 20; Described ring-shaped pottery base 20 is the firm banking of copper anode substrate 21, and center ceramic fixed axis and electronic filter grid center are fixed, target and perforate one_to_one corresponding; The encapsulation of described spring copper sheet 22 is fixed in the side edge of supervisor 2, and the below being deep into ring-shaped pottery base 20 contacts with screw terminal, on described spring copper sheet 22 fluted as connecting terminal, another side at supervisor 2 foreign side connection high pressure; Described motor 17, for rotary ceramic fixed axis 18, utilizes external circuits to control its anglec of rotation, is packaged in supervisor 2 inner.
The present invention filters electron beam by regulating high pressure and magnetic field, and the electron beam after filtration clashes into target.Target, under the exciting of high-energy electron, can be inspired the X ray of different wavelength range, and wave-length coverage is little, and the homogeneous X-ray intensity of outgoing is strong.
Circuit:
Described X ray control circuit is as shown in Figure 8: cathode light sources II is powered to it by external Special pulse modulation power source U1; U2 is Au negative electrode supply power voltage, and voltage is added on copper rod 5-1, is connected with Au negative electrode 7-2 by contact conductor; U3 is solenoid 3, U4 is special electromagnet 4 supply power voltage; Ug represents the high-voltage power voltage being connected on high pressure connection 16, the external positive high voltage Ug=10 ~ 50kV of high pressure connection 16; U
mcp1for voltage before MCP, voltage is added on copper rod 5-2, is connected with MCP pressure ring A27 by contact conductor; U
mcp2for voltage after MCP, voltage is added on copper rod 5-1, is connected with MCP pressure ring A28 by contact conductor.
The above, be only the present invention's preferably embodiment, and these embodiments are only for purpose of explanation, and do not limit the scope of the invention and essence.
Claims (6)
1. a pulsed homogeneous X-ray pipe, it is characterized in that: this pulsed homogeneous X-ray pipe comprises ray tube main body I, cathode light sources II, electron beam filter mechanism III, described cathode light sources II is arranged on above ray tube main body I, and electron beam filter mechanism III is arranged on one end of ray tube main body I;
Wherein, described ray tube main body I comprises shell (1), be arranged on the supervisor (2) in shell (1), be arranged on the solenoid (3) in supervisor (2) taper end, be arranged on the electromagnet (4) of solenoid (3) side in supervisor (2) taper end, be arranged on the ceramic case (6) in supervisor (2), be arranged on three copper rods with contact conductor (5) of the uniform arrangement of vertical setting of types of ceramic case (6) one end, the copper rod (5-1) of described centre is through shell (1), supervisor (2) is connected with Au cathode construction (7) with ceramic case (6), described Au cathode construction (7) is made up of negative electrode annular outer cover (7-1) and Au negative electrode (7-2), described ceramic case (6) is also provided with MCP electron multiplication device (8), described MCP electron multiplication device (8) is by MCP (25), be arranged on the MCP fixture (26) of MCP (25) outside, the MCP pressure ring A (27) and the MCP pressure ring B (28) that are arranged on MCP (25) both sides are formed,
Described cathode light sources II comprises square aluminum hull (9), the ultraviolet LED (11) be arranged on by ultraviolet LED fixture (10) in square aluminum hull (9), be arranged on lens fixed housing (12) below square aluminum hull (9), the extender lens (14) be arranged on by jackscrew (15) and cushion angle (13) in lens fixed housing (12); The installation fixed housing that wherein said square aluminum hull (9) is ultraviolet LED (11), play the thermolysis preventing ultraviolet radiation and ultraviolet LED (11), extender lens (14) is arranged on the below of ultraviolet LED (11) exit portal, front and back position is with installing jackscrew (15) as micro-adjusting mechanism, can control ultraviolet light expand after in the shadow surface position of negative electrode, adjustment outgoing electron bundle position; Cathode light sources II is integrally fixed on negative electrode (7) top of ray tube main body I;
Described electron beam filter mechanism III comprises high pressure connection (16), connect the spring copper sheet (22) of high pressure connection (16), be arranged on the fixed axis (18) of position, supervisor (2) taper end axis, be arranged on the electronic filter grid (19) on supervisor (2) fixed axis (18) and ring-shaped pottery base (20), the uniform copper anode substrate (21) be arranged on ring-shaped pottery base (20), be arranged on the anode target material (23) on copper anode substrate (21) top, be connected to the round end fixed screw (24) of copper anode substrate (21) other end, be connected to the motor (17) of fixed axis (18) outer end, described electronic filter grid (19) and ring-shaped pottery base (20) are concentric co-axial structure, and three copper anode substrates (21) are fixed on ring-shaped pottery base (20) upper, each other angle be 120 degree, position of opening on electronic filter grid (19) and three copper anode substrate (21) position one_to_one corresponding, control rotary integral structure choice target by motor (17).
2. a kind of pulsed homogeneous X-ray pipe according to claim 1, it is characterized in that: in described Au cathode construction (7), it is inner that Au negative electrode (7-2) is installed on negative electrode annular outer cover (7-1) by metal ring trim ring, and contact conductor is drawn from negative electrode annular outer cover (7-1) inside and is fixed on middle copper rod (5-1) and is connected with Au negative electrode (7-2); The shape of described ceramic case (6) is semienclosed six cube structures, adjacent two sides perforate, its mesopore (6-1) is as the incidence end of light source, hole (6-2) is as electron beam exit end, and the described middle copper post (5-1) be connected with negative electrode annular outer cover (7-1) is through ceramic case (6) and be connected as a whole with it.
3. a kind of pulsed homogeneous X-ray pipe according to claim 1, is characterized in that: the MCP pressure ring A (27) on described MCP electron multiplication device (8) is connected with upper copper rod (5-2) by contact conductor A, MCP pressure ring B (28) is connected with lower copper rod (5-3) by contact conductor B.
4. a kind of pulsed homogeneous X-ray pipe according to claim 1, it is characterized in that: the coiling length of described solenoid (3) is L, internal diameter is D, be enclosed in the taper end of ray tube main body I close to MCP electron multiplication device (8), solenoid (3) pin two sections connects electric power system makes solenoid inside produce magnetic field, direction is parallel with beam motion direction, plays the direction constrain to outgoing electron bundle.
5. a kind of pulsed homogeneous X-ray pipe according to claim 1, it is characterized in that: two pieces of described special electromagnet (4) are arranged on the both sides up and down of ray tube main body I taper end by U-shaped fixture, mutually vertical, opposite polarity is contrary, spacing between two pieces of special electromagnet (4) is D, D is ray tube main body I taper end diameter, and magnetic field range length is L, intensity is T, the external electric power system of supply lines that described electromagnet (4) is drawn.
6. a kind of pulsed homogeneous X-ray pipe according to claim 1, is characterized in that: described electronic filter grid (19) are circular discs, and filtering electronic bundle Exit positions perforate on dish, blocks as electron beam emergent light; Described ring-shaped pottery base (20) is arranged three identical copper anode substrates (21), described copper anode substrate (21) is cylindrical structural, upper end with tapered ramp (21-1) as anode material evaporation face, respectively by Mg, Cr, W element evaporation on the surface of tapered ramp (21-1), that copper anode substrate (21) end is band screw pedestal is cylindrical, be screwed on ring-shaped pottery base (20); The firm banking that described ring-shaped pottery base (20) is copper anode substrate (21), center ceramic fixed axis and electronic filter grid center are fixed; Described spring copper sheet (22) encapsulation is fixed in one end side edge of supervisor (2), while the below being deep into ring-shaped pottery base (20) contacts with screw terminal, described spring copper sheet (22) is above fluted connects high pressure connection (16) as connecting terminal, another side in supervisor (2) foreign side; Described motor (17), for rotary ceramic fixed axis (18), utilizes external circuits to control its anglec of rotation.
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| CN201610044852.XA CN105513930B (en) | 2015-11-05 | 2016-01-22 | Pulsed homogeneous X-ray pipe |
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| 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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| CN105513930B 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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| US10499484B2 (en) * | 2017-11-16 | 2019-12-03 | Moxtek, Inc. | X-ray source with non-planar voltage multiplier |
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| 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
-
2016
- 2016-01-22 CN CN201610044852.XA patent/CN105513930B/en not_active Expired - Fee Related
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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105206489A (en) | 2015-12-30 |
| CN105513930B (en) | 2017-05-31 |
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