Method for induction electron acceleration. RU patent 2513034.
 Source of braking radiation / 2482642Source of braking radiation comprises a magnetic conductor, poles, excitation windings, central inserts, an accelerating chamber, a target, two systems of shift windings with opposite pulse ampere turns in the end of the acceleration cycle. Shift windings are arranged between the accelerating chamber and the magnetic conductor. In windings of the first system created by shift windings that are nearest to poles, direction of pulse ampere turns matches direction of currents in shift windings, and windings of the second system are arranged between windings of the first system with gaps relative to windings of the first system and between each other. The gap between shift windings of the second system is less than size of the accelerating chamber in axial direction. A part of the gap between shift windings of the first and second systems is filled with a magnetic material. |
 Source of braking radiation / 2482641Source of braking radiation comprises a magnetic conductor, poles, excitation windings, central inserts, an accelerating chamber, a target, two systems of shift windings with opposite pulse ampere turns in the end of the acceleration cycle. Shift windings are arranged between the accelerating chamber and the magnetic conductor. In windings of the first system created by shift windings that are nearest to poles, direction of pulse ampere turns matches direction of currents in shift windings, and windings of the second system are arranged between windings of the first system with gaps relative to windings of the first system and between each other. The first system of shift windings is made with amplitude of pulse ampere turns higher than amplitude of ampere turns of the second system. |
 Betatron having removable accelerator block / 2479168Betatron (1), particularly in an x-ray inspection station, having an accelerator block which has a rotationally symmetrical inner yoke composed of two spaced-apart pieces (2a, 2b), at least one main field coil (6a, 6b), and a toroidal betatron tube (5) lying between the pieces (2a, 2b) of the inner yoke, with an outer yoke which embraces the accelerator block, connects the two pieces (2a, 2b) of the inner yoke, and has at least one lateral opening, as well as a lead shield which accommodates the accelerator block and the outer yoke, wherein the outer yoke consists of at least two parts which are movable relative to one another between an open and a closed position, and the accelerator block can laterally removed from the opening which is in the open position of the outer yoke. Betatron is fitted with means of fixing parts of the external yoke in a closed position, said means being accessible through the lead shield. |
 Positron acceleration method, and device for its implementation / 2468546Positron acceleration method involves acceleration of charged particles with vortex electric field of cyclic induction accelerator - betatron. Positrons are ejected to acceleration chamber from radioactive isotope; at that, magnetic field growth rate is synchronised with induced electric field so that orbit on which positrons move remains constant during the whole acceleration cycle. Positron acceleration device includes magnetic conductor, excitation windings, acceleration chamber and output windings. In acceleration chamber above or under median plane on mean radius of acceleration chamber there installed is radioactive isotope of positrons. |
 Lead screen for introduction electron accelerator / 2454047Invention refers to X-ray inspection appliances. A lead screen (1) for an introduction electron accelerator (2) in an X-ray generator consisting of at least four shielding boxes (7, 8, 9, 10) two of which (7, 8) are represented in the form of a semicylinder and have recesses (11, 12) in their side surfaces with side surfaces of the semicylindrical shielding boxes (7, 8) located in the matched recesses of the other shielding boxes (9, 10) so the recesses (11, 12) in the side surfaces form air channels between the semicylindrical shielding boxes (7, 8) and other shielding boxes (9, 10). |
 Method for cyclic acceleration of charged particles / 2451435Time-constant dipolar magnetic field is generated, where the spatial configuration of the dipole field is determined by the azimuthal length of the dipole sections, which enables, in the entire range of accelerated energies, to have small orbit deviation from the orbit with maximum energy in the dipole and have coinciding orbits outside the dipole. Charged particles are injected into the dipolar magnetic field. The particles are accelerated by an electric inductive field with pulse frequency which is a multiple of the orbiting period of the particles in the cyclic accelerator and the particles are output from the accelerator. |
 Coaxial magnetic plasma accelerator / 2442095FIELD: accelerators. SUBSTANCE: device can be used to accelerate plasma to hyperspeeds. The coaxial magnetic plasma accelerator is a cylindrical titanium barrel positioned coaxially inside a solenoid coil. A fuse link, made from titanium wires, is positioned inside the solenoid coil and connects electrically the starting of the barrel and a central titanium electrode which is connected to one of the terminals of the accelerator feed circuit. The second terminal of the solenoid coil is connected with the barrel starting. The casing of the central electrode unit is made from magnetic material and covers an area where the fuse link is positioned. The length of the part covering the fuse link area is 40-50 mm and its exterior surface is cone-shaped. A cylindrical copper piece is installed into the barrel starting, the length of this copper piece should not exceed one quarter of the titanium barrel length. There are saw notches in the ending of the copper piece, the length of these cuts does not exceed 85% of the copper piece length. EFFECT: extra-hard powder-like mixture production; the mixture is based on titanium and contains a copper flexible binding agent. 1 dwg |
 Betatron structure and betatron structure manufacturing method / 2434369Betatron structure includes vacuum chamber, injector arranged in it and two or more magnets arranged outside vacuum chamber. According to one of the versions the betatron structure also includes at least one target made and arranged so that it represents an integral part of injector or is combined with injector. Vacuum chamber includes are least two or more parts connected together. At least one of the above two or more parts is coated with coating with active resistance. At least one of the above two or more parts of the coating is alloyed as per the specified specific conductivity. Betatron structure manufacturing method involves stages of betatron parts manufacture, arrangement of injector on one of those parts, connection of parts so that hollow chamber is formed and two or more magnets are arranged outside hollow chamber. |
 Coaxial magnetoplasma accelerator / 2431947Coaxial magnetoplasma accelerator consists of a cylindrical electrically conducting rod made from two electrically conducting cylinders, an inner graphite cylinder and an outer metallic cylinder, and a centre electrode consisting of a graphite tip and a metallic tail, electrically connected by fuse link made from carbon powder. The centre electrode is separated from the cylindrical electrically conducting rod by an insulator. The housing is made from magnetic material, matched with the outer metallic cylinder and overlaps the zone where the fuse link is located by 40-50 mm. The solenoid is tied up by powerful current-conducting pins between a flange and a glass-fibre support ring. The terminal of an external power supply circuit is connected to the current-conducting pins. A second power supply circuit is connected to the metallic tail. |
 Method of accelerating positively charged particles and ions and hollow inductive accelerator / 2422924Method of accelerating positively charged particles and ions involves use of second-class conductors in pulsed induction accelerators as conducting working walls and placing or forming a plasma column at axes thereof. The hollow pulsed inductive accelerator has a cavity formed by two coaxial walls 2 made from insulating material, for example glass. The walls 2 are spaced apart on the radius and are sealed at the ends by metallic flange washers 3 and 4. The cavity between the walls 2 is filled with a second-class conductor 1 used as the working conducting element. The flange washers are connected in series with the second-class conductor 1 to a circuit 5 with a pulsed current generator 6. |
 Method for preserving number of electrons in process of acceleration in betatron / 2281622Electron beam into stability area is injected with transverse section in form of elongated ellipse, greater axis of which is positioned in median plane of betatron. |
 Method for accelerating electrons in a betatron / 2319325Method for accelerating electrons in a betatron includes injection of electrons and acceleration cycle. In process of electronic beam acceleration cycle the radius of balanced orbit within limits of stability area is reduced according to law where R0 - radius of balanced orbit and a and b - greater and lesser semi-axes of ellipsoid cross-section of electronic beam after injection, and R01(t) - radius of balanced orbit and a1(t) and b1(t) - greater and lesser semi-axes of ellipsoid cross-section of electronic beam in the process of acceleration cycle. |
 Betatron electromagnet / 2339192Betatron electromagnet is related to accelerating equipment and may be used in development of betatrons that are intended for control of heavy-load transport means, containers and large-size items. Betatron electromagnet contains stands, yokes, poles with central inserts and multi-layer magnetising winding, which is arranged in the form of two sections that are symmetrically installed relative to middle plane of multipolar clearance; at that every section of winding is arranged as stepped, and steps of sections face the middle plane, and their number and number of turns in every step are selected so that turns of any step that are closest to the middle plane are distanced from this plane at the distance that is equal or more than the distance from the middle plane to the closet turn of i step. |
 Device for charge-particle beam conducting / 2356193Claimed invention relates to accelerating equipment and high-current electronics. Conducting device can be used in design of systems for charged particles beam input into various accelerators working in the mode of single pulses. In the claimed device focusing system is made stepped consisting of at least two magnet lenses and output shaper. In the magnet lenses inner stepped current-conducting screen is located, and output shaper step is made tapered with smooth transition from circular section at input to ellipsoidal section at output. Each of magnet lenses is connected to independent switched power supply. |
 Method for induction acceleration of charged particles / 2359434Invention is related to accelerating equipment and may be used in creation of induction cyclic accelerators of industrial purpose. Method of induction acceleration of charged particles consists in generation of magnetic filed increasing in time, injection of charged particles in it, acceleration of particles by induction electric field and withdrawal of accelerated particles. Magnetic field is generated with average value of magnetic induction, which is much lower than value of induction in orbit. Sign-changing gradient of magnetic field is generated in orbit with index of field, which is much higher than unit (intense focusing). Charged particles are accelerated by impulses of induction electric field with duration of impulses, which is much lower compared to time of field growth in orbit and is equal to half of particles circulation period with frequency of pulses repetition, which is equal to frequency of particles circulation and amplitude ΔU=ΔBvR0, where: ΔB is growth of induction per time of single circle, R0 is orbit radius, v is velocity of particles. |
 Electromagnet coil assembly method / 2397566Electromagnet coil assembly method involves bonding of the frame parts, each of which consists of coaxially adjacent disc and cylindrical sections. On one of the parts there laid are windings to spiral grooves. By applying the bonding agent to one of the parts, there connected are bonded parts with further application of compression force to them. Gap is left between cylindrical sections of parts. Abundant amount of bonding agent is applied in the form of circular bead to surface of disc sections of the part with the winding laid at the distance of 1/3-1/2 of radial size of disc from cylindrical section. As the bonding agent spreads, compression force is gradually increased. At that, effluent bonding agent is removed. Gap of not less than 0.25-0.5 mm is formed between cylindrical sections. Bonding agent is applied on the basis of 1-2 kg/m. Maximum compression force F=S·P, where S-contact area of disc sections of parts, m2, and P=104-1.2·104 Pa. |
 Ironless betatron electromagnet / 2397627Ironless betatron electromagnet has two coaxial flat spiral coils with a solenoid between them whose leads are connected to a power supply. The ends of the solenoid are connected to inner ends of the flat spiral coils. The electromagnet is divided into two parts which are symmetrical about a plane. Each part includes a main flat spiral coil and solenoid and an extra flat spiral coil and an extra solenoid with opposite main winding B of each part from the butt-end facing the plane of symmetry. The ends of the main and extra solenoids are connected to each other. On the other butt-end, the main solenoid is connected to the main flat spiral coil. The extra solenoid is connected to the extra flat spiral coil. The solenoids and flat spiral coils have N-recesses and n windings, where N and n are integers. The leads are coaxial. |
 Device for directing beam of electrons accelerated in betatron onto target / 2400949Device for directing a beam of electrons accelerated in a betatron onto a target has two groups of windings which are symmetrical about the plane of symmetry of the betatron. Each group includes a ring bias winding which is coaxial with the betatron and a sector emission winding. The middle of the said sector winding is diametrically opposite the target. The said sector winding is formed by several coils which are made in form of annular sectors uniformly distributed in an angle stretching 180°, are connected in parallel and are connected to their own power supply. |
 Method for inductive ion acceleration / 2420045Particles are accelerated in a magnetic field increasing over time, in which the average value of magnetic flux density inside the equilibrium orbit Bav is much less than the magnetic flux density at the equilibrium orbit. B0 ("Bav<<B0"), In order to keep the radius of the equlibrium orbit constant during acceleration, special relationships between amplitude-time characteristics of magnetic flux density on the orbit and the induced acceleration voltage are satisfied. In order to realise strong focusing, magnetic field with a large alternating gradient is formed on the orbit. The absence of resonant accelerating systems and synchronisation of accelerating pulses with pulses of the time-of-flight beam system enables to accelerate particles in a wide range of particle energy (velocity) with constant equilibrium radius during acceleration. |
| Method of accelerating positively charged particles and ions and hollow inductive accelerator / 2422924 Method of accelerating positively charged particles and ions involves use of second-class conductors in pulsed induction accelerators as conducting working walls and placing or forming a plasma column at axes thereof. The hollow pulsed inductive accelerator has a cavity formed by two coaxial walls 2 made from insulating material, for example glass. The walls 2 are spaced apart on the radius and are sealed at the ends by metallic flange washers 3 and 4. The cavity between the walls 2 is filled with a second-class conductor 1 used as the working conducting element. The flange washers are connected in series with the second-class conductor 1 to a circuit 5 with a pulsed current generator 6. |
FIELD: physics.
SUBSTANCE: invention relates to acceleration techniques and can be used in making induction cyclic accelerators for industrial purposes, e.g. for modifying and producing new materials, sterilising medical instruments and food products, disinfecting medical wastes and other wastes, cleaning industrial flue gases from hazardous SOx and NOx oxides. The disclosed method involves achieving given final energy (≤10 MeV) using a rectangular wave of accelerating induction voltage and a triangular wave of the guiding magnetic field. In order to keep the radius of the equilibrium orbit constant during acceleration, special relationships between amplitude-time characteristics of magnetic induction on the orbit and induced accelerating voltage are satisfied. In order to realise strong focusing, a magnetic field with a large alternating gradient is formed on the orbit.
EFFECT: high average power of a beam of accelerated charged particles, reduced size and weight of the induced cyclic accelerator of electrons, simple power supply system of the induction accelerating system, low cost of the accelerator.
5 dwg
The invention relates to accelerator technology and can be used when creating induction of cyclic accelerators for industrial use, for example, for the modification and production of new materials, sterilization of medical instruments and food products, disinfection of medical and other waste, flue gas purification of industrial enterprises from harmful SO x and NO x oxides.
Known electron accelerators for industrial technology type ELV [1]. This direct action accelerators, in which the accelerating electric field is created by permanent difference of potentials between the cathode and the anode electrode. For extraction of a beam from the accelerator, the electrode must be under the ground potential, so in direct action accelerators cathode voltages equal to the energy of accelerated electrons. At an energy of 2.5 MeV at the cathode is the voltage of 2.5 MB, and the accelerator design of direct action should provide electrical isolation of the cathode at a constant voltage equal to the maximum allowable energy. This determines the large size of direct action accelerators (more than 4 m high).
In high-frequency accelerators (which include accelerators type DRS) for acceleration of electrons is used alternating high frequency (HF) electric field, so the issue of providing electrical isolation is solved easier. In accelerators type DRS electrons are accelerated in the gap RF resonator high quality. The resonator excited HF generator through the loop of communication and RF circuit works as a step-up transformer.
Accelerators type DRS [2-4] are resonator machines running at the standing half. Working frequency accelerators DRS are in a meter band radio waves - 118 MHz (IL-6 and IL-10) and 180 MHz (SILT-8). The length of the accelerating gap accelerator DRS-8 - 3.6 cm, ILU-6 - 16 cm, ILU-10 - 26 see, for Accelerating the clearance of these machines shorter wavelength in vacuum, so in the process of acceleration of electrons gained energy, almost equal to the maximum voltage at the resonator. In accelerators DRS used triode electron gun (with a control electrode), located directly in front of the accelerating gap.
Using a control voltage to electronic gun allows you to quickly adjust the beam current and reduces the phase angle of injection, which significantly reduces fluctuations of the energy of the electrons in the beam.
Accelerators type DRS have their advantages and disadvantages in relation to the most widespread type of accelerators, accelerators direct action, which include produce INP accelerators of ELV type. Accelerators DRS is the pulse of the machine. Their dimensions are smaller (height of 2-2,4 m), and the energy of accelerated electrons more (1-5 MeV)than that of ELV accelerators. They do not need a tank of compressed gas SF 6 for gas insulation of high voltage parts of the accelerator. In the accelerator ILU-10 on triode electron gun is served RF voltage with adjustable phase shift relative to the accelerating voltage that changes the phase angle of injection and reduces the dispersion of the energies of electrons in the beam.
The disadvantages of accelerators DRS include: the relatively low conversion factor consumed the electric power in the beam power, and maximum power accelerators (up to 50 kW) is limited by the power produced by the generator lamps.
Unlike the linear accelerators of ELV and DRS cyclic accelerators have no high voltage accelerating systems with the voltage of up to 1-5 MB. The required energy of the electrons acquire at multiple passing of accelerating gap voltage average value [5, 6]. For radiation technologies used in industry, requires accelerated electron beams with energies of 0.5-10 MeV. Cyclic accelerators in this energy range is much smaller and cheaper than direct action accelerators and microwave accelerators.
Induction of cyclic accelerators [5, 6] and the criteria proposed in this work, have low weight of the magnetic material and are not tunable resonant accelerating structure, but they are intended for induction acceleration of light particles - electrons, which are quickly gaining speed on the first speed, and the main acceleration process is conducted at the speed of particles near the speed of light. The period of revolution of the electron in the range of the required energy is t<10 NS, which complicates the formation of accelerating pulses of duration t/2 and fronts order ≤10 -9 C.
As a prototype choose the method [6]. This method consists in that form an increasing time-magnetic field with an average value of magnetic induction, much less of magnetic field induction in orbit, form the alternating magnetic field gradient in orbit with the index of the field, many large units (strong focus), Inuktitut it charged particles; accelerate charged particles pulse induction electric field and take accelerated particles. The disadvantages of the prototype specified earlier.
The technical result of the invention is to increase the average power of the accelerated beam, as well as reducing the weight and dimensions of the accelerator by reducing the perimeter of the orbit and shorten the duration of the cycle, simplify and reduce the cost of accelerating system, reducing the cost of the accelerator and the increase of the adjustment range of the energy of accelerated electrons.
The method of induction of electron acceleration is that growing form in the magnetic field with an average much less than the magnetic field on the orbit; form the alternating gradient magnetic fields in orbit with the index field many large units (strong focus); Inuktitut in him electrons; accelerate the electron pulse induction electric field and take accelerated electrons, for acceleration of electrons form a triangular waveform leading magnetic field and rectangular waveform induction accelerating electric field, duration accelerating part of a wave is equal to the duration of linear growth of the magnetic induction on the equilibrium orbit that corresponds to the duration of the acceleration process, the change of the flow of magnetic induction Δ in the inductors accelerating system choose from the relation:
Δ F = 1 e Δ P L = Δ B i n d S ,where ΔP=P-P 0 - the growth momentum of the electrons in the acceleration process (P 0 - momentum of electrons injection, P is the momentum of the electrons in the end of the process acceleration), L is the perimeter of the orbits of electrons, & Delta; b ind ≤2B S - band changes induction in accelerating inductors in the acceleration process, B S - induction of saturation inductors, S=Δrl - total cross section of all inductors accelerating section (Δr-radial size of the inductors / -length induction section), e is the electron charge, at the same time, the accelerating voltage choose from the relation:
& Delta; b ind S=V acc T,
where V acc total voltage accelerating inductors, T - duration of the accelerating momentum.
Distinctive features of the claimed process is the following: to accelerate electrons form a triangular waveform leading magnetic field and rectangular waveform induction accelerating electric field, duration accelerating part of a wave is equal to the duration of linear growth of the magnetic induction on the equilibrium orbit that corresponds to the duration of the acceleration process, thus, altering the flow of magnetic induction in Δ inductors accelerating system choose from the relation:
Δ F = 1 e Δ P L = Δ B i n d S ,where ΔP=P-P 0 - the growth momentum of the electrons in the acceleration process (P 0 - momentum of electrons injection, P is the momentum of the electrons in the end of the process acceleration), L is the perimeter of the orbits of electrons, & Delta; b ind ≤2B S - band changes induction in accelerating inductors, B S - induction of saturation inductors, S=Δrl - total cross section of all inductors accelerating section (Δr - radial size of inductors, l-the length of the induction section), e is the electron charge, at the same time, the accelerating voltage choose from the relation:
& Delta; b ind S=V acc T,
where V acc total voltage accelerating inductors, T - duration of the accelerating momentum.
The technical result of the invention that uses this method is: reducing the weight and dimensions of the accelerator by reducing the perimeter of the orbit and shorten the duration of the cycle; simplify and reduce the cost of accelerating system, reducing the cost of the accelerator and the increase of the adjustment range of the energy of accelerated electrons. This is achieved by the combination of all the essential features of the formula can accelerate electrons from energy injection until the specified end energy, not a series of pulses of accelerating induction system, the number of which is equal to the number acceleration cycles (the speed of the electron acceleration), and the duration of each accelerating pulse (less than or equal to half the period of conversion electrons t 0 ≤10 -9 c), and one square wave pulse with a duration equal to the acceleration process of t-10o -7 -10 -6 C.
This method of acceleration allows to reduce to the minimum the period of revolution of the electron, which leads to an increase in the average beam power, reduction of the perimeter of the orbit, to reduce the size of the accelerator, its weight and cost, significant simplification and cheapening of the system of formation of the accelerating voltage pulse.
Adjusting the energy of the electrons at the exit of the accelerator produces a change of the parameter T waves of magnetic induction of accelerating voltage.
In addition, the use of induction method of acceleration acceleration of electrons in increasing magnetic field with an average magnetic field is much less of a magnetic field on the orbit and with alternating magnetic field gradient in orbit (strong focus), can further increase the beam intensity and reduce the weight and cost of electron accelerator.
The list of drawings
Figure 1 - the scheme of the accelerator.
Figure 2 - scheme of the C-shaped cores with alternating gradient.
Figure 3 - the wave form of the magnetic induction on the equilibrium orbit.
Figure 4 diagram On-shaped cores of induction accelerating section.
Figure 5 - amplitude-time characteristics of magnetic induction on the equilibrium orbit (a) and the accelerating voltage coils On-shaped cores (inductors) (b).
The method works as follows: a Beam of charged particles (electrons) derive the equilibrium orbit of a particle beam hold on equilibrium orbit magnetic field With-shaped magnets (1), accelerating electric field induced by On-shaped ferromagnetic cores (inducers) (2), and at achievement of the required energy is removed from the accelerator.
For the implementation of the proposed method of acceleration increasing in time the magnetic field in orbit form S-shaped magnets with high gradients field n>>1 and n<<-1. The combination of two types-shaped cores assures focus ions.
Figure 2 shows a diagram C-shaped cores of magnets with alternating gradient. Electromagnets form a triangular shape of the waves of the magnetic field.
The wave form of the magnetic induction B 0 in orbit shown in figure 3, where T - the duration of the growing part of the wave induction corresponding to the duration of the process of acceleration.
Particles moving on the equilibrium orbit, are accelerated by the electric field induced by On-shaped ferromagnetic cores (inducers), which are located on the straight parts of the accelerator.
Figure 4 shows a diagram Of-shaped cores of induction accelerating system: 1) ferromagnetic cores, inductors, 2) excitation coils, 3) lines of force of the induced electric field. In order to accelerate the equilibrium radius of the orbit remained constant, you must perform the well-known condition of constancy in the acceleration process ratio
P (t) /eB (t) =const,
where P (t) and b (t) is the momentum of ions and magnetic field induction in orbit in the acceleration process, e is the electron charge.
This condition occurs when the value of the total induced On-shaped cores voltage equal to:
V acc =R 0 LdB/dt,
where R 0 is the equilibrium radius of the orbit, L - total perimeter of the orbit with account of linear sections.
Amplitude-time characteristics of magnetic induction on the orbit and the accelerating voltage coils On-shaped cores (inductors) is shown in Figure 5:
a) the wave Form of induction of a magnetic field on the equilibrium orbit In 0(t) ,
b) the wave Form of induction of accelerating voltage inductors V acc(t) .
The pulse duration of the accelerating voltage V acc(t) is equal to the duration of linear growth of the magnetic induction on the equilibrium orbit In 0(t) that corresponds to the duration of the process of acceleration of electrons.
The positive part of the pulse accelerates the ions and negative part peremagnichivanii On-shaped cores and returns them to their original state. Such a mode of acceleration is possible if the change of the total flow of magnetic induction in the inductors accelerating section Δ=ind & Delta; b's and a change in the momentum of the electrons Δ=P-P 0 are based:
Δ F = 1 e Δ P L ,as the total voltage induction section
V acc =Δ/T
where & Delta; b ind ≤2B S - change induction B S - induction of saturation, S - total cut of core inductors, L is total length of the perimeter of the given linear sections, P=mcβγ and P 0 - final and initial impulses of electrons, T - duration of the process of acceleration, c is the light velocity, beta and gamma - relative speed and relativistic factor of electrons.
Formation of a magnetic field in the gaps With-shaped electromagnet with a large radial gradient and implementation of ion focusing alternating field gradient (strong focus) allows to increase the number of electrons accelerated in one cycle acceleration. Great indicator of magnetic field reduces the amplitude of betatron oscillations and reduces the size of the vacuum chamber, to reduce the size, weight and cost of the C-shaped magnets.
For example, consider the basic parameters of the electron accelerator for the 10 MeV. When energy 10 MeV relativistic factor of the electrons is equal to g=20.6, and their relative speed β≅of 1.0. When the amplitude of the magnetic induction leading magnetic field B max =0.1 T a closed orbit radius R is equal to 0:
R 0 =P max /eB max =mc 2 γβ/ecB max =0.33 l,
where P max - the maximum momentum of the electron, e is the electron charge, m is the electron mass, and c is the light velocity,?=V/c - relative velocity protons, B max - the maximum amplitude of the magnetic induction field.
If the total perimeter of the orbit with account of linear sections equal to L≈2.4 m, then the period of accelerated protons will be equal to t min was 8·10 -9 C, and the requested change of the flow of magnetic induction will be:
Δ F = 1 e Δ P L = m c 2 γ β e c = 0.08 T l x m 2The duration of the acceleration cycle T=1 ISS, the amplitude of accelerating voltage will be V acc =Δ/T=80 kV. When the radial size of the cross section of inductors accelerating section, equal Δr=0.2 m, the length of the section of inductors is equal to l=0.4 m If the radial size of each inductor ≈ 0.01 m, it will take 40 inductors with the voltage on the exciting coils ind V =2 kV. If necessary, voltage V ind can be reduced by increasing the duration of the acceleration cycle T. For the formation of a square wave accelerating voltage, you can use transistor key schemes. Transistor converters DC voltage in AC have high reliability, durability and efficiency In work [7] reported on the implementation of the Converter with the capacity of 1.6 MW with a switching frequency 150 kHz. Available transistor switches with switching frequencies up to 30 MHz and a capacity of up to 1.8 kW [8]. Rapid progress in the field of semiconductor switches make it possible to hope that powerful power supply system for induction accelerators of particles with high repetition rate cycles will be developed in the near future.
List of literature
1. R.A. Salimov, Cherepkov V.G., Golubenko J.I. et al. DC high power electron accelerators of ELV-series: status, development, and applications // Radiation Physics and Chemistry. 2000. №57. P. 661-665.
2. Auslender, V. L. ILU-type electron accelerator for industrial technologies // Nuclear Instruments and Methods in Physical Research. 1994. №89. P.46-48.
3. Auslander V.L., Bezuglov V.V., Brazgin A.A. and other Accelerators of electrons series IL and their use in radiation-technological processes // Neirokhirurgii. atomic science and technology. Series: Technical physics and automation. 2004. Vyp. P.78-85.
4. Auslander V.L., Brazgin A.A. Voronin, L.A. and other Accelerators of electrons series DRS and their applications in industry and medicine // Proceedings of the Eleventh international conference on application of accelerators in industry and medicine. SPb., 2005. P.78-81.
5. .V.Dolbilov, "The Compact Iduction Circular Accelerator for Radiation Technologies", Proceedings ofAPAC 2007, Raja Ramanna Centre for Advanced Technology(RRCAT), Indore, India, p.p.628-629.
6. Gvidovita, "Method of induction of charged particle acceleration", the Patent for the invention № 2359434, 05 July 2007
7. H.Matthes, R. Jurgens, "1.6 MW 150 kHz Series Resonant Converter Circuit incorporating IGBT Device for welding Applikation", International Seminar Heating, Padova, p.25-31.
8 one Abo Zied, Peter Mutschler, Guido Bachmann, "A Modulator IGBT Converter System for High Frequency Induction Heating Application", PCIM 2002, 14-16 .05, Nurenberg.
The method of induction acceleration of electrons, namely, that form an increasing time-magnetic field with an average much less than the magnetic field on the orbit; form of alternating magnetic field gradient in orbit with the index of the field, many large units (strong focus); Inuktitut in him electrons; accelerate the electron pulse induction electric field and take accelerated electrons, notable for acceleration of electrons form a triangular waveform leading magnetic field and rectangular waveform induction accelerating electric field, duration accelerating part of a wave is equal to the duration of linear growth of the magnetic induction on the equilibrium orbit that corresponds to the duration of the acceleration process, the change of the flow of magnetic induction Δ in the inductors accelerating system choose from the relation:
where ΔP=P-P 0 - the growth momentum of the electrons in the acceleration process (P 0 - momentum of electrons injection, P is the momentum of the electrons in the end of the process acceleration), L is the perimeter of the orbits of electrons, & Delta; b ind ≤2B S - band changes induction in accelerating inductors, B S - induction of saturation inductors, S=Δrl - total cross section of all inductors accelerating section (Δr - radial size of inductors, l - the length of the induction section), e is the electron charge, with the accelerating voltage is chosen from the relation: & Delta; b ind S=V acc T, where V acc total voltage accelerating inductors, T - duration of the accelerating momentum.