Apparatus and methods of adjusting magnetic system for forming beam of protons in object plane of proton graphic system, matching magnetic induction of magnetooptical imaging system and monitoring adjustment of multiframe for recording proton images

FIELD: physics.

SUBSTANCE: apparatus for adjusting a magnetooptical system for forming a beam of protons consists of a pulsed electromagnet which is formed by a pair or a system of pairs of thin conductors directed along the axis of a proton graphic channel spread in a transverse plane. A scaling array of metal plates mounted in a frame is placed at the output of the electromagnet. The method of adjusting a magnetic system for forming a beam of protons and a method of matching magnetic induction of an imaging system involve generating a magnetic field, through which the beam of protons is passed, the direction of said beam through the imaging system to a recording system by which the image of the scaling array is formed. Upon obtaining a distorted image, the magnetic beam forming system is adjusted and magnetic induction of the magnetooptical imaging system is adjusted by varying current of lenses of said systems and retransmitting the beam of protons until the required images are formed.

EFFECT: high quality of adjustment.

4 cl, 14 dwg

 

The invention relates to a method of registering images, generated by the proton beam, and may find application in the study of materials and objects using radiographic methods registration of images using charged particles.

The task in this field of technology is to obtain high quality images of the study area at acceptable costs for construction, installation and maintenance of the research complex. How to configure the systems produce high-quality images are an integral part of this task.

From the prior art known devices, which perform the tuning of various systems pathographies complex. For example, the use of the world and test objects for system configuration register pathographies images in one frame (Antipov, Y.M., Afonin, A.G., Vasilevskii, A.V., Gusev, I.A., Demyanchuk, V.I., Zyat''kov, O.V., Ignashin, N.A., Karshev, Y.G., Larionov, A.V., Maksimov, A.V., Matuyshin, A.A., Minchenko, A.V., Mikheev, M.S., Mirgorodskii, VA, Peleshko, V.N., Rud'ko, V.D., Terekhov, V.L, Tyurin, N.E., Fedotov, Y.S., Trutnev, Y.A., Burtsev, V.V., Volkov, A.A., Ivanin I.A., Kartanov, S.A., Kuropatkin, Y.P., MoE, A.L., Mikhailyukov, K.L., Oreshkov, O.V., Rudnev, A.V., Spirov, G.M., Symnin, M.A., Tatsennko, M.V., Tkachenko, I.A. & Khramov, I.V. 2010. A radiograpfic facility for the 70-GeV proton accelerator of the institute for high energy physics. Instruments and Experimental Techniques, 53,319-326.). For example, as mariapolis system of sets of metal plates, alternating with plexiglass with the changing step in each set.

The configuration process using such devices is quite long and with their help it is impossible to configure a multi-frame registration system, because the object of scanning static, and static single frame does not differ from the other.

From the prior art known how to reconcile the magnetic induction magneto-optical system imaging pathographies channel with the energy of the protons, which includes the determination of the distribution of protons in the beam by passing the beam through the device settings magnetooptically system pathographies channel - profilometer. With the passage of the beam through the profilometer, its electrodes are charged, register the charge distribution, which is judged on the distribution of the protons in the beam ["Multiframe protonotaria on the basis of the U-70 accelerator as a method for studying fast processes", URI, A.i.lebedev, Alikhanov, V.A. Ogorodnikov, Averescu, Knnow, Aphrodi, Oveisi, Masironi, Yu.a.trutnev, Iwhrekan. 65 VNIIEF. Physics and technology of high energy density: Scientific publication in 2 editions. Issue 2. Sarov: FSUE "RFNC-VNIIEF", str-225]. This method is chosen as the prototype of the proposed method approval of the magnetic induction of magneto the optical system for imaging pathographies channel with the energy of the protons.

The disadvantages of this method are the low accuracy of determination of the distribution of protons across the field. In order to obtain the distribution of the protons using profilometers around the magneto-optical channel, it is necessary to place the moving parts and their elements in different areas of the channel that is associated with technical difficulties. In addition, profilometers have inside the vacuum system pathographies channel, which makes the output.

Currently there are no methods of control settings multiframe registration system. There is a way to control the settings of individual channels by registering individual bunches proton beam at the appropriate time ["Proton radiographic installation at 70 GeV-om the IHEP accelerator", Umotion, Aghavanin, Avinashi, Vigilancy, Avetisov, Naegelin, Uggerslev, Averageman, Amy, Avenel, Msika, VA Mirgorodskaya, Vnilla, VDDIO, Veerakul, Nehuen, Usedots, Yu.a.trutnev, WAV, Alexander Volkov, Iaiaeen, Chacaltana, Uporabiti, Alikhanov, Averescu, Aphrodi, Gemserv, Masironi, Mwhaaa, Iasca.com, Iwhrekan. Preprint 2009. - 14 IHEP, 2009]. Proton beam accelerator U-70 contains 29 bunches (clots) of the protons. Each bunch has its own number. The duration of the bunch sostav the em ~15 NS, the time interval between bunches ~165 NS. Since the distribution of protons in space in each of the 29 bunches almost the same, there may be errors in the configuration of a multi-frame registration system, when one bunch is another.

In principle, may be used to control the settings of the multi-frame registration system dynamic objects containing explosives (he)as the characteristic speed of the investigated processes of not less than 1 km/s configuration of the magnetic path can be carried out in stages for each Quartet, so you may need a large number of explosive experiments. Each explosive experiment involves the installation of an explosive device inside the explosion-proof camera (IBD). After each experience of the camera and the device must be changed, this leads to high costs in time and resources, so in practice it is not applied. Other ways to achieve such speeds, for example, using a gas gun even more time-consuming.

Based on the above, for the proposed method of control settings multiframe registration system for proton imaging prototype not found.

The technical result that can be obtained when using the inventive devices and methods, is to improve the quality settings magnetooptic the coy system pathographies complex. The composition of the magneto-optical system includes: a system of beam (nodes and devices, carrying out the transport of the proton beam from the accelerator to the object plane/area of study), the system of forming images (nodes and devices responsible for transportation from the object plane to the registration system and the registration system image.

This technical result is achieved due to the fact that:

Device for adjusting the magneto-optical system and quality control multiframe image registration system pathographies complex includes a pulsed electromagnet formed by the pair or pairs of thin wires oriented along the axis pathographies complex and spaced apart in the transverse plane, with each pair connected to your generator current pulses launched by the programmer, providing a temporary delay generators, and outside the coil, perpendicular to the direction of movement of protons installed the scaling grid of metal plates secured to the frame;

The setting method of the magnetic system of formation of the proton beam in the object plane pathographies complex, also in common with the prototype of signs, consisting in the determination of the distribution is s protons in the beam by passing the beam through the device configuration of the magneto-optical system pathographies complex, includes distinctive, namely:

as the device configuration of the magneto-optical system pathographies complex use device consisting of a pulsed electromagnet comprising at least a pair of conductors;

the conductors are placed in the object plane of the image along the direction of propagation of the proton beam;

- through the conductors pass an electric current that generates a magnetic field;

- pass through a magnetic field, the proton beam, which changes their trajectory;

the proton beam is directed through a system of forming an image, comprising a collimator, a registration system;

using the registration system for the proton beam to create an image generated by the magnetic field of the device, and the image of the scale grating;

- when receiving asymmetric with respect to the lattice image concludes the necessary settings of the magnetic system of formation of the proton beam in the object plane pathographies channel;

adjustment is carried out by changing the current lens in the beam shaping and re-transmission of the proton beam before the formation of the symmetrical image;

- the necessary currents lenses can be pre-calculated by numerical simulation, when the volume is significantly reduced the number of required launches accelerator;

How to reconcile the magnetic induction magneto-optical system imaging pathographies complex with proton energy, also in common with the prototype characteristics, which consists in determining the distribution of protons in the beam by passing the beam through the device configuration of the magneto-optical system pathographies channel contains distinctive, namely:

as the device configuration of the magneto-optical system pathographies channel using a device consisting of a pulsed electromagnet comprising at least a pair of conductors; the conductors are placed in the object plane of the image;

- placement carried out in such a way that its conductors are oriented in the direction of propagation of the proton beam;

- on the exit of the electromagnet, perpendicular to the direction of movement of protons, set the scaling bars are made of metal plates secured to the frame;

- through the conductors pass electric current and generate a magnetic field;

- pass through the field of the proton beam, changing their trajectory;

the protons are sent through the system imaging, including the collimator, the registration system;

using system registration form the image to the scale of Bermuda lattice;

- when receiving a distorted image reconciled magnetic induction magneto-optical system imaging with proton beam energy by changing the current lens optical system imaging and re-crossing of the proton beam before forming an undistorted image of the scaling of the lattice, the required currents lenses can be calculated beforehand by means of numerical simulations, this significantly reduces the number of required launches accelerator.

The control method of configuring a multi-frame registration system proton images includes comparing the calculated images of the simulated processes registered in the formation of a series of changing images on the Converter registration system pathographies channel, to do this in the object plane of the images excite pulsed magnetic field influencing the direction of movement of protons, with a maximum energy density of the field move in the object plane with a minimum speed of 1 km/s by placing a device consisting of a pulsed electromagnet formed by the system of pairs of thin wires oriented along the axis pathographies channel and spaced apart in the transverse plane, with each pair connected is your generator current pulses, launched by the programmer, providing vremenno the delay generators, then passed through a magnetic field a series of bunches of protons, forming a sequence of images on the recorder.

The use of pulsed electromagnet formed by a pair or pairs of thin wires oriented along the axis pathographies complex and spaced apart in the transverse plane, allows you to generate a magnetic field, which changes the trajectory of the beam when transporting it in the plane of the Registrar and to form an image whose form is judged on the accuracy configuration of the system of training of the beam.

Installation outside the magnet, perpendicular to the direction of motion of the protons, the scaling of the lattice of the metal plates fixed in the frame, allows to determine the symmetry of the image relative to it. When receiving an asymmetrical image will configure the magnetic system of formation of the proton beam in the object plane pathographies complex by changing the current lens in the beam shaping and re-crossing of the proton beam to obtain the estimated shape corresponding to the optimal value of the currents in the training of the beam.

Connecting each pair of conductors to her pulse generator current, starts aemula programmer, providing a temporary delay generators, allows you to create a series of images that are significantly different from each other, meet each proton beam bunches.

The magnetic field excited by a pair of conductors with current, leads to a significant deviation of the particles and, consequently, to an increased distortion of the lattice, resulting in non-optimal setting of the lens system of the image transfer. Changing currents in the lens system of the image transfer, achieve the ideal image of the grating.

Comparing the estimated image obtained with high accuracy, and recorded in the experiment images get rated quality setting multiframe Registrar. The image lattice is the scaling factor.

Control over the distribution of protons in the beam are carried out by the image of the proton beam, it helps to set up a multi-frame registration system by comparing the experimentally obtained frames and theoretically calculated.

The movement of the maximum energy density of the field in the object plane with a minimum speed of 1 km/s allows to distinguish visually subsequent frame from the previous one.

In figure 1, 2, 3, 4 presents a series of paintings designed in variations of the current in the lens system of training of the beam.

Figure 5, 6, 7, series Sneem is s, obtained when optimizing current lenses Quartet.

On Fig, 9, 10 is a series of photos calculation used when configuring a multi-frame registration system, and on 11, 12, 13 - experimental, with a conventional collimator with a diameter of 20 mm

On Fig schematically shows a specific example of the inventive device, where: 1 - current generators, 2 - wires, 3 - scaling lattice, 4 - collimator.

A specific example of the inventive device shown in Fig, is a device for adjusting the magneto-optical system and quality control multiframe image registration system pathographies complex (hereinafter - the device configuration and control), consisting of a cylindrical metal case with a diameter of ~15 cm In building a pulsed electromagnet formed by three pairs of thin (diameter ~2 mm) copper conductors connected in series and forming a current loop. The case is equipped with feet adjustable height. The wires are oriented along the axis pathographies channel and spaced apart in the transverse plane. The conductors are fixed in vinyl plastic tube with a plastic lid with a thickness of 5 mm each. Each loop is connected with their high-voltage pulsed current generator placed outside the building and run by the programmer, through the om three cable KVI-50 length 3 m The programmer provides a temporary delay generators. Parallel to the findings of each of the loops is connected a resistor (~1 Ohm) to suppress the switching voltage fluctuations. At the exit of the electromagnet installed in the housing of the scaling grid (cell size 2 cm) of the metal plates 2 mm thick, fixed in the frame, and the collimator. The collimator is installed outside the housing and is made of tungsten in the form of a tube with a thickness of 5 cm and an inner diameter of 20 mm After the collimator to the optical axis mounted swivel mirror and the Converter is in the form of a disk of lutetium silicate. The image is recorded by a multi-frame of the Registrar. Swivel mirror, Converter, recorder and multiframe are not shown.

The device configuration and control is performed as follows.

After Assembly of the device perform its alignment relative to the proton beam by adjusting the height of the legs of the cylindrical body and the combination of the guide lines on the body with the projection of the thread stretched along the beam axis along the guide line. The final alignment (adjustment and control) are carried out by pathographies images of the grating 3. Directly next to the device feature generators current pulse 1, the high voltage charger and control unit (PR is Grammaton). All capacitive drives generators 1 are charged to the same voltage, and software change in the ratio of the currents in the conductors 2 device setup and control by selecting start delay generators 1. Using the device configuration and control is carried out by all known methods.

The setting method of the magnetic system of formation of the proton beam in the object plane pathographies complex includes the following operations. Pre-calculated by determining the magnitude of the current feeding the lens system forming the proton beam. Form a series of bunches of protons. Set the activation sequence generator 1 using the programmer in accordance with the sequence of passing bunches of protons on the transportation system through the device. The current passing through the conductors 2 form of quick-variable magnetic field. Using three pairs of conductors 2 with the current of the collimator 3 and the transportation system of the beam in the plane of the Registrar form the image of the grating 3 and the magnetic field, the shape of which depends on the accuracy of the system setup training beam. The image formed on the Converter and using the rotary mirror is transported on a multi-frame Registrar. Upon receipt asymmetric with respect to the lattice image provide by the three magnetic system of formation of the proton beam in the object plane pathographies complex by changing the current lens in the beam shaping and re-crossing of the proton beam through the device to getting the appropriate forms, corresponding to the optimal value of the currents in the formation of the beam. In figure 1, 2, 3, 4 shows the series of paintings designed in variations of the current in the lens system forming the beam collimator with a diameter of 15 mm). Originally lens current is equal to I0and the estimated image of the magnetic field device is symmetrical about the horizontal axis when the current 0.94×I0.

How to reconcile the magnetic induction magneto-optical system imaging pathographies complex with proton energy includes the following operations. The transmission of current through the conductors 2 for forming a quick-variable magnetic field, through which is passed a stream of protons, send it through the system imaging, including the collimator 4, the registration system, which consists of a Converter, a rotary mirror and multiframe Registrar, which form the image of the scale grating 3. Magnetic transfer system of the beam in the perfect setting provides the image transfer from point to point without distortion. Passing a beam of protons through the scaling grid 3 received its undistorted image. The magnetic field generated by three pairs of conductors with a current of 2, leads to a significant deviation h is CI, accordingly, increased distortion of the lattice 3, resulting in non-optimal setting of the lens system forming the image. When receiving a distorted image reconciled magnetic induction magneto-optical system imaging with proton beam energy. Coordination is carried out by changing the current lens optical system forming the image, then re-transmit the beam of protons through the scaling grid 3 to the formation of an ideal (undistorted) image scaling grating 3. Figure 5, 6, 7 shows an experimental image of the magnetic field and the scaling of the lattice, obtained by experimental testing of the claimed device. Figure 5 and 6 visible distortion of the image lattice distortion is minimal for the image of figure 7, when the current is picked up correctly.

The control method of configuring a multi-frame registration system proton images includes the following operations. Get high accuracy in the calculated image of the simulated processes (shown in Fig, 9, 10). In the object plane of the images excite pulsed magnetic field influencing the direction of movement of protons, with a maximum energy density of the field move in the object plane with a speed of 5km/s Using a system of conductors 2, the generators 1 and the programmer is formed a series of images that are significantly different from each other, meet each of the bunches of the proton beam (see figure 11, 12, 13). Comparing the estimated image obtained with high accuracy, and recorded in the experiment images get rated quality setting multiframe Registrar. The image lattice is the scaling factor. We can say that each bunch "sees" different magnetic field and, accordingly, the Converter is formed by a different image. Control over the distribution of protons in the beam are carried out by the image of the proton beam, it helps to set up a multi-frame registration system by comparing the experimentally obtained frames and theoretically calculated. In the experiments for testing the proposed method defined sensitivity settings of the inlet of the magnetic path and the magnetic optics, which is not less than 0.2% of the current set.

Thus, the inventive device and methods help to improve the quality settings of the magneto-optical system pathographies complex with ease and reasonable cost of service research complex. At the moment, other methods or devices that allow you to customize magnitno the optics with an accuracy of 0.2% current not found.

1. Device for adjusting the magneto-optical system and quality control multiframe image registration system pathographies complex, consisting of a pulsed electromagnet formed by a pair or pairs of thin wires oriented along the axis pathographies channel and spaced apart in the transverse plane, with each pair connected to your generator current pulses launched by the programmer, providing a temporary delay generators, and the output of the electromagnet set the scaling grid of metal plates secured in the frame.

2. The setting method of the magnetic system of formation of the proton beam in the object plane pathographies complex, which consists in determining the distribution of protons in the beam by passing the beam through the device configuration of the magneto-optical system pathographies complex, characterized in that as the device configuration of the magneto-optical system pathographies complex use device consisting of a pulsed electromagnet including a pair of conductors, which is placed in the object plane of the image so that the conductors are oriented in the propagation direction p. the otonic beam, through the conductors pass electric current and generate a magnetic field through which is passed a beam of protons, changing their trajectory and directing through the system imaging, including a collimator, a registration system, which form the image beam, upon receipt of the asymmetric image will configure the magnetic system of formation of the proton beam in the object plane pathographies complex by changing the current lens in the beam shaping and re-crossing of the proton beam before the formation of the symmetrical image.

3. How to reconcile the magnetic induction magneto-optical system imaging pathographies complex with proton energy, which includes the determination of the distribution of protons in the beam by passing the beam through the device configuration of the magneto-optical system pathographies complex, characterized in that as the device configuration of the magneto-optical system pathographies complex use device consisting of a pulsed electromagnet including a pair of conductors, which is placed in the object plane of the image so that its conductors are oriented in the direction of propagation of the proton beam, whereas the ohms at the output of the electromagnet set the scaling bars, made of metal plates secured in the frame, then through the conductors pass electric current and generate a magnetic field, through which is passed a beam of protons, changing their trajectory and directing through the system imaging, including a collimator, a registration system, which form the image of the scaling of the lattice, when receiving a distorted image reconciled magnetic induction magneto-optical system imaging with proton beam energy by changing the current lens optical system imaging and re-crossing of the proton beam before the formation of the undistorted image scaling grid.

4. The control method of configuring a multi-frame registration system proton images, consisting in the comparison of calculated images of the simulated processes registered in the formation of a series of changing images on the Converter registration system pathographies channel, to do this in the object plane of the images excite pulsed magnetic field influencing the direction of movement of protons, with a maximum energy density of the field move in the object plane with a minimum speed of 1 km/s by placing a device consisting of a pulsed electromagnet, formed by a system of pairs of thin wires oriented along the axis pathographies channel and spaced apart in the transverse plane, with each pair connected to your generator current pulses launched by the programmer, providing a temporary delay generators, then passed through a magnetic field a series of bunches of protons, forming a sequence of images on the Registrar.



 

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EFFECT: obtaining a three-dimensional image of a plankton sample, assembled using standard methods, with high refinement of objects.

FIELD: measurement equipment.

SUBSTANCE: sample is previously frozen, a frozen sample under conditions of negative temperature is put in contact with a frozen solution of a radio-opaque agent, upon completion of sample saturation, computer X-ray microtomography of the sample is carried out under negative temperatures, and by means of analysis of the produced computer tomographic image they detect spatial distribution and concentration of ice and/or gas hydrate inclusions of open and closed porosity, distribution of pores by size, specific surface in the sample.

EFFECT: higher accuracy of assessment of characteristics of non-consolidated porous media.

10 cl, 1 dwg

FIELD: medicine.

SUBSTANCE: immunological and ray examinations of intramammary lymph nodes of bronchopulmonary group are conducted. It is combined with Diaskin-test integrated with advanced tuberculin diagnosing and determination of a specific antibody titre. If observing positive results and the absence of X-ray pattern changes, multispiral computed tomography (MSCT) is conducted. A disturbed structure of the root of lungs requires MSCT with angiography. A size gain of the intramammary lymph nodes more than 0.5 cm at density more than +0.25 HU, tuberculosis of the intramammary lymph nodes of bronchopulmonary group is diagnosed.

EFFECT: diagnosing tuberculosis of the intramammary lymph nodes of bronchopulmonary group in children.

2 ex

FIELD: physics.

SUBSTANCE: device comprises phase grating to pass X-rays from X-ray source to form distribution of interference intensity by Talbot effect, absorption grating partially screening interferences intensity distribution formed by said phase grating, detector to detect data on distribution of moire intensity formed by absorption grating, and arithmetic unit to calculate data on differential phase image of object by making Fourier transform for data on moire intensity distribution detected by aforesaid detector.

EFFECT: higher quality.

12 cl, 9 dwg

FIELD: physics.

SUBSTANCE: when obtaining images of an object, the principle of arrangement of objects, associated with measurement, which is carried out when photographing, is observed. The photograph obtained using X-rays simultaneously includes a certain number of reference points whose positions are known in a three-dimensional coordinate system. The method involves use of coordinates of the reference points in both the Cartesian coordinate system, associated with reconstruction of the three-dimensional image, and in a coordinate system associated with digital photographing, which is required to establish the relationship which enables to perform transformations between these two coordinate systems. The path and the position of each X-ray beam are determined using said relationship. Also, all three-dimensional elements associated with each of those X-ray beams passing through the object of interest are determined.

EFFECT: high resolution and shorter duration of exposure to X-rays, as well as simple design of the device, low power consumption and less rigid conditions for facilities where the device is used.

3 cl, 11 dwg

FIELD: nondestructive testing.

SUBSTANCE: method can be used for checking passenger's luggage and aviation and naval containers. Method concludes in generating electron beam in pulse forming unit. Current pulses are injected in structure accelerating electron beam. High-frequency pulses are generated inside the unit and passed to electron beam accelerating structure followed by bombardment of conversion target with flow of accelerated electrons. Accelerating structure operating in running wave mode is used as accelerating structure. Electron beam current pulse amplitude when generating in electron beam current pulse forming unit and values of high-frequency power pulse frequency in high-frequency power pulse forming unit are to be changed simultaneously. Device for irradiating conversion model has electron beam current pulse forming unit which has outputs connected with first input electron beam accelerating system through injector. Accelerating structure is made for bombarding conversion target with accelerated electron flow. Device also has high-frequency power pulse forming unit which has output connected with second input of electron beam accelerating system. Electron beam accelerating structure is made in form of accelerating structure operating at running wave mode. Electron beam current pulse forming unit has at least one synchronizer which has control output connected with control input of high-frequency power pulse forming unit. At least one synchronizer is made for simultaneous change of frequency of high-frequency power pulses at output of high-frequency pulse forming unit and value of change in electron beam current pulse amplitude at output electron beam current pulse forming unit.

EFFECT: improved degree of sensitivity relating to selection of material.

9 cl, 5 dwg

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