Paper | Title | Page |
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TUZ02 | Accelerator Technologies Development at ITEP | 34 |
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Restart of scientific activity at ITEP associated with join it to the pilot project of NRC "Kurchatov Institute" is the occasion for summing up of intermediate results and existing capability of accelerator physics and technologies development in the institute. School of accelerators construction at ITEP has old traditions and refers on studying, invention, mastering and implementation to operation of technological features of proton and ion beams generation, transportation, acceleration, accumulation, extraction and space-time formation for usage of accelerated beams in physical experiments and applied research works. Historical survey and current state of accelerator science activity at ITEP are presented. | ||
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Slides TUZ02 [2.051 MB] | |
TUPSA16 | Electron Gun with Adiabatic Plasma Lens | 72 |
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Funding: This work supported by the Russian Foundation for Basic Research (grant № 12-02-00866-а) For researches on plasma physics has been designed and constructed the electronic gun with the cold cathode on energy about 250 keV. The electron beam have the parameters: time width of pulses 100 ns, current amplitude 100 A. The adiabatic plasma lens is used to reduce the beam size to the demanded value. The results of tests are presented. |
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TUPSA26 | Electrodes Form Optimization of RF Deflecting System Wobbler for FAIR Project | 91 |
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Funding: SAEC "Rosatom" and Helmholtz Association The new method for high energy density states in matter investigation, which based on irradiation of combined target by hollow high energy heavy ion beam was proposed in the Institute for theoretical and experimental physics (ITEP). The target consists of a sample of matter at the center and a hollow shell around it. The experiment of high energy density states generation will be carry on at FAIR project. The RF deflecting system (Wobbler) for hollow high energy heavy ion U28+ beam with kinetic energy Wk=1 GeV/n formation is developing at ITEP. The current results of electrodes form optimization for RF deflecting system (Wobbler) which is developing at ITEP for FAIR project are shown in this paper. |
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TUPSA30 |
Analysis of the Magnetic Field Distribution of PMQ Lenses for PRIOR Setup | |
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Funding: Joint Helmholtz-ROSATOM FAIR-Russia Research Centre (HGF-IVF-IK-Ru-002) As part of the FAIR project, HEDgeHOB collaboration involves developments of PRIOR* proton-radiographic facilities, one of the purposes of which is to study the state of matter in extreme conditions. In the currently in GSI (Darmstadt, Germany), prototype of PRIOR proton microscope setup is developing, this setup designed for the use of proton beam with energy of 4.5 GeV. Magnetic optics of PRIOR proton microscope forming section consists of four quadrupole lenses created on the basis of permanent magnets (PMQ). For best quality (linearity, magnetic axis position, angle of median plane) of the magnetic field of quadrupole lenses and a full-scale setup simulation is necessary to measure the magnetic field inside the lenses. For the measurement of the magnetic field (radial component of the magnetic field) of quadrupole lenses are designed and developed magnetic field scanner. Scanning of the magnetic field is performed on cylindrical surface near the inner surface of PMQ lenses. Based on the results of scanning the radial component of the magnetic field will be carried out calculations of the mathematical model (developed in ITEP)**, which describes the distribution of the magnetic field at any point within the aperture of the lens. In this work presents the results of the calculation of all components of the magnetic field, determining the position of the magnetic axis,harmonic analysis and the analysis of non-linearity of the magnetic field for PRIOR PMQ lenses. *D. Varenstov et.al.; PRIOR for GSI and for FAIR; 4th International Workshop on HEPM, 2013 **V.S. Skachkov et.al.; REPM Quadrupole for Proton Microscopy; 2th International Workshop on HEPM, 2010 |
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WEX02 |
Activities on Proton Radiography at ITEP | |
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The first activity on proton beam application to radiography was started about 45 years ago. Success of proton radiography was based on main characteristics the thickness of transmitted object, a spatial resolution which were significantly better then for X-ray. The possibility of the experiments executed according to the scheme "proton-object-detector" are limited with proton multiple scattering in object. In the end of 90-s in the USA it was shown that negative effects of multiple scattering could be suppressed by placing a system of magnetic lenses between an object and detector. Area of application for radiographic setup with protons becomes wider in comparison with traditional X-ray system. Use of proton radiography it becomes possible to study dynamic objects as protons could be removed from the accelerator by short pulses. In Russia first experiments on radiography with accelerated charged hadrons were carried out on the TWAC-ITEP accelerator facility in 2003. In those experiments a beam of carbon ions with energy of 200MeV/u without a magneto-optical system was used for radiographic purpose. From 2005 at ITEP operated the proton radiography facility using the magneto-optical system with different parameter of magnification "-1", "-4" and "-8". The review of the experimental activity on proton radiography аt ITEP is presented. | ||
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Slides WEX02 [5.201 MB] | |
WECA02 | Radiobiological Research with Charged Particles Beams in ITEP | 128 |
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Radiobiological researches with heavy ions have been started at ITEP in 2006 on unique heavy ion accelerating facility ITEP-TWAC. The main purpose of these researches is study of the biological efficiency of carbon ions for different types of biological objects, such as tumor and normal cells, in the framework of the development of heavy ion therapy for cancer treatment in Russia. Another possible area of application of this research is the space radiobiology, studying stochastic and deterministic effects of ionizing radiation in the space environment on human. In this work the experimental setup for radiobiological research with heavy ions in ITEP, the dosimetry system for dose measurements and the results of the radiobiological researches with carbon ions are presented. | ||
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Slides WECA02 [16.246 MB] | |
WEPSB25 | PRIOR Proton Microscope | 214 |
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Funding: Joint Helmholtz-ROSATOM FAIR-Russia Research Centre (HGF-IVF-IK-Ru-002) The new proton radiography facility PRIOR* (Proton microscope for FAIR) was developed at SIS-18 accelerator at GSI (Darmstadt, Germany). PRIOR setup is designed for measurement, with high spatial resolution up to 10 mkm, of density distribution of static and dynamic objects by using a proton beam with energy up to 4.5 GeV. The magnetic system of the PRIOR beam-line consists of two sections. The first, matching section, contains electromagnetic-quadruple lenses and provides formation of a proton beam for the objects imaging task (beam size, angular distribution). The second section is a magnification (K ~4) section that consists of four Permanent Magnet Quadruples (PMQ) lenses. Tungsten collimators, installed at central plane of magnification section, provides regulation of contrast of the proton-radiographic images. Investigated object installed between first and second section. The registration system for static experiments consists of CsI scintillator and plastic scintillator (Bicron BC-412) for dynamic one with two types of intensified CCD cameras: PCO DiMAX and PCO DicamPro. In the first experiments with static objects with 3.6 Gev proton, was demonstrated a spatial resolution of 30 mkm. Dynamic commissioning was performed with target based on underwater electrical wires explosion with electrical pulse with current amplitude of ~200 kA and time duration of few microseconds. * Merrill F.E. et al., Proton microscopy at FAIR, AIP Conf. Proc. 1195, 2009, p.667 |
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WEPSB38 | Multifunctional Extraction Channel Development Heavy Ion RFQ (Radio Frequency Quadrupole) | 245 |
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In the ITEP the Heavy Ion RFQ HIP-1 (Heavy Ion Prototype) provides ion beams for two different experimental programs. The first one is successfully ongoing and it is aimed to irradiation resistance investigation of reactor construction materials. Samples of new materials for reactors are irradiated by beams of iron, vanadium ions accelerated by the linac. The structure changes are investigated by both transmission electron microscope and atom-probe tomography. The second one is under development and it is aimed to investigate ion beam interaction with plasma and metal vapor targets. On the basis of beam dynamics simulation the design of new RFQ-output line for both experiments realization was developed. Details of beam dynamics simulation and output line design are presented and discussed in this paper. | ||
WEPSB48 | Status of Experiments on Surface Modification of Materials on the Accelerator HIP-1 | 269 |
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Ion-implant doping is efficient method of modification for near-surface layers material which used in different technological applications. The most common example of its is increase wear, corrosion, heat resistance of various industrial steels, special alloys implantation for applications in biology and medicine, surface layers of polymers strengthening and changes in the morphology. Works in this direction is executing on TIPR-1 accelerator in ITEP. Bunches of titanium and vanadium which are generated in MEVVA and nitrogen beams are generated in duoplasmatron was mastered acceleration to provide of experimental work. Several series of experiments on the modification of the surface of samples for further study by atomic probe tomography and transmission electron microscopy executed. Nanostructure of the surface layers of oxide dispersion strengthened steels exposed to ion beams showed makeover. | ||
TUPSA30 |
Analysis of the Magnetic Field Distribution of PMQ Lenses for PRIOR Setup | |
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Funding: Joint Helmholtz-ROSATOM FAIR-Russia Research Centre (HGF-IVF-IK-Ru-002) As part of the FAIR project, HEDgeHOB collaboration involves developments of PRIOR* proton-radiographic facilities, one of the purposes of which is to study the state of matter in extreme conditions. In the currently in GSI (Darmstadt, Germany), prototype of PRIOR proton microscope setup is developing, this setup designed for the use of proton beam with energy of 4.5 GeV. Magnetic optics of PRIOR proton microscope forming section consists of four quadrupole lenses created on the basis of permanent magnets (PMQ). For best quality (linearity, magnetic axis position, angle of median plane) of the magnetic field of quadrupole lenses and a full-scale setup simulation is necessary to measure the magnetic field inside the lenses. For the measurement of the magnetic field (radial component of the magnetic field) of quadrupole lenses are designed and developed magnetic field scanner. Scanning of the magnetic field is performed on cylindrical surface near the inner surface of PMQ lenses. Based on the results of scanning the radial component of the magnetic field will be carried out calculations of the mathematical model (developed in ITEP)**, which describes the distribution of the magnetic field at any point within the aperture of the lens. In this work presents the results of the calculation of all components of the magnetic field, determining the position of the magnetic axis,harmonic analysis and the analysis of non-linearity of the magnetic field for PRIOR PMQ lenses. *D. Varenstov et.al.; PRIOR for GSI and for FAIR; 4th International Workshop on HEPM, 2013 **V.S. Skachkov et.al.; REPM Quadrupole for Proton Microscopy; 2th International Workshop on HEPM, 2010 |
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WEX02 |
Activities on Proton Radiography at ITEP | |
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The first activity on proton beam application to radiography was started about 45 years ago. Success of proton radiography was based on main characteristics the thickness of transmitted object, a spatial resolution which were significantly better then for X-ray. The possibility of the experiments executed according to the scheme "proton-object-detector" are limited with proton multiple scattering in object. In the end of 90-s in the USA it was shown that negative effects of multiple scattering could be suppressed by placing a system of magnetic lenses between an object and detector. Area of application for radiographic setup with protons becomes wider in comparison with traditional X-ray system. Use of proton radiography it becomes possible to study dynamic objects as protons could be removed from the accelerator by short pulses. In Russia first experiments on radiography with accelerated charged hadrons were carried out on the TWAC-ITEP accelerator facility in 2003. In those experiments a beam of carbon ions with energy of 200MeV/u without a magneto-optical system was used for radiographic purpose. From 2005 at ITEP operated the proton radiography facility using the magneto-optical system with different parameter of magnification "-1", "-4" and "-8". The review of the experimental activity on proton radiography аt ITEP is presented. | ||
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Slides WEX02 [5.201 MB] | |
WECA02 | Radiobiological Research with Charged Particles Beams in ITEP | 128 |
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Radiobiological researches with heavy ions have been started at ITEP in 2006 on unique heavy ion accelerating facility ITEP-TWAC. The main purpose of these researches is study of the biological efficiency of carbon ions for different types of biological objects, such as tumor and normal cells, in the framework of the development of heavy ion therapy for cancer treatment in Russia. Another possible area of application of this research is the space radiobiology, studying stochastic and deterministic effects of ionizing radiation in the space environment on human. In this work the experimental setup for radiobiological research with heavy ions in ITEP, the dosimetry system for dose measurements and the results of the radiobiological researches with carbon ions are presented. | ||
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Slides WECA02 [16.246 MB] | |
WEPSB25 | PRIOR Proton Microscope | 214 |
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Funding: Joint Helmholtz-ROSATOM FAIR-Russia Research Centre (HGF-IVF-IK-Ru-002) The new proton radiography facility PRIOR* (Proton microscope for FAIR) was developed at SIS-18 accelerator at GSI (Darmstadt, Germany). PRIOR setup is designed for measurement, with high spatial resolution up to 10 mkm, of density distribution of static and dynamic objects by using a proton beam with energy up to 4.5 GeV. The magnetic system of the PRIOR beam-line consists of two sections. The first, matching section, contains electromagnetic-quadruple lenses and provides formation of a proton beam for the objects imaging task (beam size, angular distribution). The second section is a magnification (K ~4) section that consists of four Permanent Magnet Quadruples (PMQ) lenses. Tungsten collimators, installed at central plane of magnification section, provides regulation of contrast of the proton-radiographic images. Investigated object installed between first and second section. The registration system for static experiments consists of CsI scintillator and plastic scintillator (Bicron BC-412) for dynamic one with two types of intensified CCD cameras: PCO DiMAX and PCO DicamPro. In the first experiments with static objects with 3.6 Gev proton, was demonstrated a spatial resolution of 30 mkm. Dynamic commissioning was performed with target based on underwater electrical wires explosion with electrical pulse with current amplitude of ~200 kA and time duration of few microseconds. * Merrill F.E. et al., Proton microscopy at FAIR, AIP Conf. Proc. 1195, 2009, p.667 |
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