K. Murayama, T. Nishi, Y. Teramoto, S. Kohno, I. Lisitsyn, H. Akiyama
Gas-puff z-pinch plasmas are driven by an inductive voltage adder-inductive energy storage pulsed power generator "ASO-X" and the behavior of the plasma column and the spatial distribution of hot spots are investigated. ASO-X has a maximum output voltage and current of 180 kV and 400 kA respectively and can provide a fast current rise rate with the plasma opening switch (POS). By using ASO-X with POS operation, the stability of the plasma column and the spatial distribution of hot spots are improved.
{"title":"Gas-puff z-pinch plasmas driven by inductive voltage adder-inductive energy storage pulsed power generator ASO-X","authors":"K. Murayama, T. Nishi, Y. Teramoto, S. Kohno, I. Lisitsyn, H. Akiyama","doi":"10.1109/PPC.1999.823708","DOIUrl":"https://doi.org/10.1109/PPC.1999.823708","url":null,"abstract":"Gas-puff z-pinch plasmas are driven by an inductive voltage adder-inductive energy storage pulsed power generator \"ASO-X\" and the behavior of the plasma column and the spatial distribution of hot spots are investigated. ASO-X has a maximum output voltage and current of 180 kV and 400 kA respectively and can provide a fast current rise rate with the plasma opening switch (POS). By using ASO-X with POS operation, the stability of the plasma column and the spatial distribution of hot spots are improved.","PeriodicalId":11209,"journal":{"name":"Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)","volume":"46 4","pages":"1082-1085 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72612912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Taylor, G. Rodriguez, R. Fulton, D. Oró, B. Mccuistian, D. Clark, J. Roberts, D. Holtkamp, R. Watt, R. Bartsch, R. Trainor
Atlas will be a 23 MJ capacitor bank capable of delivering greater than 30 MA to a liner target with a nominal 4 microsecond risetime. We describe here our ongoing diagnostic development efforts in this extreme Atlas environment. Included in this discussion are development efforts in X-ray radiography, shock physics diagnostics, and temperature and pressure diagnostics. X-ray radiography is the key diagnostic for visualizing the shock-induced fluid flows characteristic of the proposed Atlas experiments. Due to the large area densities needed for Atlas targets, a number of radiographic systems are under investigation. Diagnostics that address shock physics issues on Atlas include VISAR (velocity interferometer for a surface of any reflector), shock breakout, optical pins, and dark-field shadowgraphy. Temperature diagnostics include infrared pyrometry. As pressure diagnostics we are developing probes based on the pressure dependence of the frequency of fluorescence lines from ruby and the Raman shift in diamond.
{"title":"Diagnostic development for the Atlas pulsed power facility","authors":"A. Taylor, G. Rodriguez, R. Fulton, D. Oró, B. Mccuistian, D. Clark, J. Roberts, D. Holtkamp, R. Watt, R. Bartsch, R. Trainor","doi":"10.1109/PPC.1999.825455","DOIUrl":"https://doi.org/10.1109/PPC.1999.825455","url":null,"abstract":"Atlas will be a 23 MJ capacitor bank capable of delivering greater than 30 MA to a liner target with a nominal 4 microsecond risetime. We describe here our ongoing diagnostic development efforts in this extreme Atlas environment. Included in this discussion are development efforts in X-ray radiography, shock physics diagnostics, and temperature and pressure diagnostics. X-ray radiography is the key diagnostic for visualizing the shock-induced fluid flows characteristic of the proposed Atlas experiments. Due to the large area densities needed for Atlas targets, a number of radiographic systems are under investigation. Diagnostics that address shock physics issues on Atlas include VISAR (velocity interferometer for a surface of any reflector), shock breakout, optical pins, and dark-field shadowgraphy. Temperature diagnostics include infrared pyrometry. As pressure diagnostics we are developing probes based on the pressure dependence of the frequency of fluorescence lines from ruby and the Raman shift in diamond.","PeriodicalId":11209,"journal":{"name":"Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)","volume":"34 1","pages":"236-240 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75296566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
M. Bramoulle, J. Marret, P. Michalczyk, D. Rubin de Cervens
This paper describes the evolution of the medium and high voltage DC capacitors, used for filtering and energy storage applications. This evolution was accelerated in the 1990s because of the new requirements for the DC capacitors for rolling stock. The basic design was radically changed thanks to the combination of existing but seemingly incompatible raw materials. Over the last 10 years, all the improvements have been based on a better knowledge of the influence of the metallization, including the resistivities and the segmentation modes. The successful experiences obtained on more than 50000 large filter capacitors have led to transfer this technology to the energy storage field. For this application in which the voltages and the energy are often high, the self-healing process is secured by some other resistivity levels and some different modes of segmentation in order to reduce the inrush energy in the local breakdown and to meet the discharge current requirements.
{"title":"Evolution of the DC capacitors","authors":"M. Bramoulle, J. Marret, P. Michalczyk, D. Rubin de Cervens","doi":"10.1109/PPC.1999.825423","DOIUrl":"https://doi.org/10.1109/PPC.1999.825423","url":null,"abstract":"This paper describes the evolution of the medium and high voltage DC capacitors, used for filtering and energy storage applications. This evolution was accelerated in the 1990s because of the new requirements for the DC capacitors for rolling stock. The basic design was radically changed thanks to the combination of existing but seemingly incompatible raw materials. Over the last 10 years, all the improvements have been based on a better knowledge of the influence of the metallization, including the resistivities and the segmentation modes. The successful experiences obtained on more than 50000 large filter capacitors have led to transfer this technology to the energy storage field. For this application in which the voltages and the energy are often high, the self-healing process is secured by some other resistivity levels and some different modes of segmentation in order to reduce the inrush energy in the local breakdown and to meet the discharge current requirements.","PeriodicalId":11209,"journal":{"name":"Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)","volume":"58 1","pages":"106-109 vol.1"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91279237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Electrothermal guns utilize an ablation stabilized pulsed capillary arc discharge to generate a high-pressure propellant gas. The plastic propellant, usually polyethylene, is ablated from the capillary walls by absorption of the radiative flux from the arc discharge. Similar capillary discharges have also been used to ignite conventional gun propellants in electrothermal-chemical (ETC) guns. During the rising part of the current pulse, there are rapid changes in the chamber pressure and temperature as shocks propagate from the capillary and then reflect from the base of the projectile and back into the capillary. This causes redistribution of the current density within the capillary altering the spatial ablation rates with time. MACH2 is a general purpose MHD code that has been used to simulate these complex electrical, hydrodynamic and radiation interactions for a 12 mm bore diameter electrothermal gun configuration tested at Institut St. Louis (ISL). The simulation domain includes the capillary discharge, and an expansion chamber extending to the projectile. The radiation was adjusted to match the measured pressure pulse and total ablated mass. Large radial and temporal variations in the velocity, temperature, density and radiation fields were observed in the simulations during the rising part of the current pulse. These results suggest that one-dimensional models may neglect some important physical processes.
{"title":"MACH2 simulations of an electrothermal gun","authors":"D. Keefer, R. Rhodes","doi":"10.1109/PPC.1999.823598","DOIUrl":"https://doi.org/10.1109/PPC.1999.823598","url":null,"abstract":"Electrothermal guns utilize an ablation stabilized pulsed capillary arc discharge to generate a high-pressure propellant gas. The plastic propellant, usually polyethylene, is ablated from the capillary walls by absorption of the radiative flux from the arc discharge. Similar capillary discharges have also been used to ignite conventional gun propellants in electrothermal-chemical (ETC) guns. During the rising part of the current pulse, there are rapid changes in the chamber pressure and temperature as shocks propagate from the capillary and then reflect from the base of the projectile and back into the capillary. This causes redistribution of the current density within the capillary altering the spatial ablation rates with time. MACH2 is a general purpose MHD code that has been used to simulate these complex electrical, hydrodynamic and radiation interactions for a 12 mm bore diameter electrothermal gun configuration tested at Institut St. Louis (ISL). The simulation domain includes the capillary discharge, and an expansion chamber extending to the projectile. The radiation was adjusted to match the measured pressure pulse and total ablated mass. Large radial and temporal variations in the velocity, temperature, density and radiation fields were observed in the simulations during the rising part of the current pulse. These results suggest that one-dimensional models may neglect some important physical processes.","PeriodicalId":11209,"journal":{"name":"Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)","volume":"18 1","pages":"658-661 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83520873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
D. J. Fulker, P. Winstanley, A.D. Case, S. Macgregor, R. Fouracre, F. A. Tuema
The spatial structure and temporal evolution of surface discharges have been studied. The substrate was a sheet of PTFE that was 0.5 mm thick and the cover gas was argon or nitrogen. The surface discharges were capacitively coupled to an earth plane that was located on the underside of the substrate. High-speed digital photographs were taken of the surface discharge development and these have shown that the structure was dependent upon the gas type. Uniform discharges tended to form in argon whereas filamentary discharges were prominent in nitrogen. It was also found that the amount of energy stored in the external circuit capacitance influences the nature of the surface discharge by determining both its width and uniformity.
{"title":"The evolution of pulsed discharges over PTFE in the presence of various cover gases","authors":"D. J. Fulker, P. Winstanley, A.D. Case, S. Macgregor, R. Fouracre, F. A. Tuema","doi":"10.1109/PPC.1999.823705","DOIUrl":"https://doi.org/10.1109/PPC.1999.823705","url":null,"abstract":"The spatial structure and temporal evolution of surface discharges have been studied. The substrate was a sheet of PTFE that was 0.5 mm thick and the cover gas was argon or nitrogen. The surface discharges were capacitively coupled to an earth plane that was located on the underside of the substrate. High-speed digital photographs were taken of the surface discharge development and these have shown that the structure was dependent upon the gas type. Uniform discharges tended to form in argon whereas filamentary discharges were prominent in nitrogen. It was also found that the amount of energy stored in the external circuit capacitance influences the nature of the surface discharge by determining both its width and uniformity.","PeriodicalId":11209,"journal":{"name":"Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)","volume":"91 1","pages":"1071-1074 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72898225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
For the 10 MJ-railgun PEGASUS a pulse forming network (PFN) was developed and built up which consists of 200 units with an energy of 50 kJ each. The units are completely equipped by semiconducting switches (thyristors and diodes). Due to a particular design they are extremely compact and have a blocking voltage of 12 kV and a current capability of more than 90 kA. For the railgun application a maximum current of up to 2 MA can be generated. Due to the modular set-up of the pulse forming network the current pulse can be shaped in an almost arbitrary manner. First results with this PFN by applying a railgun as load is reported. Investigations took place to apply the same PFN as energy source for an ETC-launcher as well. First investigations showed that the overvoltage peaks occurring with this application are causing damage of the pulse forming units. Measurements had to be taken in order to protect the pulse power supply against these harmful events. The experiments revealed that the units are triggered by disturbances yielded by the ETC-load. To analyse these malfunctions simulations with the electrical code PSpice have been performed. The simulations showed that by carrying out small modifications the PFN should be qualified as energy source for ETC-experiments. The 50 kJ-modules, changed in this way, were applied to an ETC-load. The experiments confirmed that a PFN consisting of several modified units is excellently qualified as energy source for an ETC-launcher because due to its highly modular configuration it allows generation of current shapes particularly adaptable to the load.
{"title":"A flexible pulse power supply for EM- and ETC-launchers","authors":"E. Spahn, G. Buderer","doi":"10.1109/PPC.1999.823778","DOIUrl":"https://doi.org/10.1109/PPC.1999.823778","url":null,"abstract":"For the 10 MJ-railgun PEGASUS a pulse forming network (PFN) was developed and built up which consists of 200 units with an energy of 50 kJ each. The units are completely equipped by semiconducting switches (thyristors and diodes). Due to a particular design they are extremely compact and have a blocking voltage of 12 kV and a current capability of more than 90 kA. For the railgun application a maximum current of up to 2 MA can be generated. Due to the modular set-up of the pulse forming network the current pulse can be shaped in an almost arbitrary manner. First results with this PFN by applying a railgun as load is reported. Investigations took place to apply the same PFN as energy source for an ETC-launcher as well. First investigations showed that the overvoltage peaks occurring with this application are causing damage of the pulse forming units. Measurements had to be taken in order to protect the pulse power supply against these harmful events. The experiments revealed that the units are triggered by disturbances yielded by the ETC-load. To analyse these malfunctions simulations with the electrical code PSpice have been performed. The simulations showed that by carrying out small modifications the PFN should be qualified as energy source for ETC-experiments. The 50 kJ-modules, changed in this way, were applied to an ETC-load. The experiments confirmed that a PFN consisting of several modified units is excellently qualified as energy source for an ETC-launcher because due to its highly modular configuration it allows generation of current shapes particularly adaptable to the load.","PeriodicalId":11209,"journal":{"name":"Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)","volume":"58 1","pages":"1353-1356 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90450119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Welleman, E. Ramezani, J. Waldmeyer, S. Gekenidis
An overview is given about semiconductor components in a range up to Vdrm=12 kV and Ip=150 kA, stackable up to more than 50 kV, for repetitive and nonrepetitive applications in pulsed power technologies. This includes also the trigger units, the stack construction as well as an estimation about reliability is presented, based on internal tests and field experience. This presentation gives the user of solid-state components an overview about the existing and newly developed devices which are available today, especially for pulsed power applications.
{"title":"Semiconductor components up to 12 kV and 150 kA for closing switches","authors":"A. Welleman, E. Ramezani, J. Waldmeyer, S. Gekenidis","doi":"10.1109/PPC.1999.823755","DOIUrl":"https://doi.org/10.1109/PPC.1999.823755","url":null,"abstract":"An overview is given about semiconductor components in a range up to Vdrm=12 kV and Ip=150 kA, stackable up to more than 50 kV, for repetitive and nonrepetitive applications in pulsed power technologies. This includes also the trigger units, the stack construction as well as an estimation about reliability is presented, based on internal tests and field experience. This presentation gives the user of solid-state components an overview about the existing and newly developed devices which are available today, especially for pulsed power applications.","PeriodicalId":11209,"journal":{"name":"Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)","volume":"146 1","pages":"1268-1271 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88837524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Kyrala, J. Hammerberg, R. Bowers, D. Morgan, J. Stokes, J. Cochrane, W. Anderson
The authors have investigated the acceleration of very thick cylindrical aluminum liners using the Pegasus II capacitor bank. These accelerated solid liners will be used to impact other objects at velocities below 1.5 km/sec, allowing them to generate and sustain shocks of a few 100 kilobar for a few microseconds. A cylindrical shell of 1100 series aluminum with an initial inner radius of 23.61 mm, an initial thickness of 3.0 mm, and a height of 20 mm, was accelerated using a current pulse of 7.15 MA peak current and a 7.4 microsecond quarter cycle time. The aluminum shell was imploded within confining copper glide planes with decreasing separation with an inward slope of 8 degrees. At impact with a cylindrical target of diameter 3-cm, the liner was moving at 1.4 km/sec and its thickness increased to 4.5 mm. Radial X-ray radiograms of the liner showed both the liner and the glide plane interface. The curvature of the inner surface of the liner was measured before impact with the 15-mm radius target. The radiograms also showed that the copper glide planes distorted as the liner radius decreased and that some axial stress is induced in the liner. The axial stresses did not affect the inner curvature significantly. Post-shot calculations of the liner behavior indicated that the thickness of the glide plane played a significant role in the distortion of the interface between the liner and the glide plane.
{"title":"Accelerating thick aluminum liners using pulsed powers","authors":"G. Kyrala, J. Hammerberg, R. Bowers, D. Morgan, J. Stokes, J. Cochrane, W. Anderson","doi":"10.1109/PPC.1999.823654","DOIUrl":"https://doi.org/10.1109/PPC.1999.823654","url":null,"abstract":"The authors have investigated the acceleration of very thick cylindrical aluminum liners using the Pegasus II capacitor bank. These accelerated solid liners will be used to impact other objects at velocities below 1.5 km/sec, allowing them to generate and sustain shocks of a few 100 kilobar for a few microseconds. A cylindrical shell of 1100 series aluminum with an initial inner radius of 23.61 mm, an initial thickness of 3.0 mm, and a height of 20 mm, was accelerated using a current pulse of 7.15 MA peak current and a 7.4 microsecond quarter cycle time. The aluminum shell was imploded within confining copper glide planes with decreasing separation with an inward slope of 8 degrees. At impact with a cylindrical target of diameter 3-cm, the liner was moving at 1.4 km/sec and its thickness increased to 4.5 mm. Radial X-ray radiograms of the liner showed both the liner and the glide plane interface. The curvature of the inner surface of the liner was measured before impact with the 15-mm radius target. The radiograms also showed that the copper glide planes distorted as the liner radius decreased and that some axial stress is induced in the liner. The axial stresses did not affect the inner curvature significantly. Post-shot calculations of the liner behavior indicated that the thickness of the glide plane played a significant role in the distortion of the interface between the liner and the glide plane.","PeriodicalId":11209,"journal":{"name":"Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)","volume":"70 1","pages":"872-875 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78692937","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Modern, continuously operating particle accelerators require large power, highly stable, radio frequency power generators to provide the sinusoidal electric field for acceleration. The most common and efficient method of generating RF power is the klystron, which is further powered by a microsecond scale, high voltage, moderate current pulse power source at moderate pulse rates. The most commonly used klystron modulator consists of a thyratron switched pulse forming line and a voltage step up transformer, which is termed a "line modulator". This paper describes the common line type modulator, the individual components, the specifications, and the cost breakdown for a typical system. The objective of this paper is to investigate the methods of designing modulators for the next generation of particle accelerators, and to evaluate circuit and component options for improving the performance to cost ratio. A large number of klystrons and thus klystron modulators will be required for any next generation particle physics accelerator and thus, the reliability and the cost of the individual components are critical parameters that will determine the feasibility of building any pulse power klystron modulator system. This paper also discusses reliability and cost issues associated with klystron modulator system and component design and implementation.
{"title":"Review of klystron modulator technology for particle accelerators","authors":"W. Nunnally, T. Engel","doi":"10.1109/PPC.1999.823678","DOIUrl":"https://doi.org/10.1109/PPC.1999.823678","url":null,"abstract":"Modern, continuously operating particle accelerators require large power, highly stable, radio frequency power generators to provide the sinusoidal electric field for acceleration. The most common and efficient method of generating RF power is the klystron, which is further powered by a microsecond scale, high voltage, moderate current pulse power source at moderate pulse rates. The most commonly used klystron modulator consists of a thyratron switched pulse forming line and a voltage step up transformer, which is termed a \"line modulator\". This paper describes the common line type modulator, the individual components, the specifications, and the cost breakdown for a typical system. The objective of this paper is to investigate the methods of designing modulators for the next generation of particle accelerators, and to evaluate circuit and component options for improving the performance to cost ratio. A large number of klystrons and thus klystron modulators will be required for any next generation particle physics accelerator and thus, the reliability and the cost of the individual components are critical parameters that will determine the feasibility of building any pulse power klystron modulator system. This paper also discusses reliability and cost issues associated with klystron modulator system and component design and implementation.","PeriodicalId":11209,"journal":{"name":"Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)","volume":"41 1","pages":"967-970 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76681339","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The time-dependent dynamics of formation, relaxation and auto-reparation of double DNA breaks by the combined irradiation action and nontraditional processes of degradation were considered. The auto-repairing of double DNA breaks is connected with the peculiarities of long-range interaction of nucleotide charges, atoms and molecules in the intracellular milieu. The properties of intracellular liquid and the characteristics of force interaction between the end pairs of nucleotides in the area of DNA break in response to radiation are changed. Each kind of radiation is characterized by the certain effectiveness of double DNA beaks formation but simultaneously one creates the conditions for their liquidation. On the basis of the analysis and correlation of these processes, time-dependent theory for DNA degradation was created, including hormesis phenomenon, radiation antagonism, the validity of anomaly influence of low and large doses at sharp and chronic radiation and others effects. The qualitative and quantitative correspondence of the theory and experimental results of radiation biology was obtained.
{"title":"The time-dependent dynamics of depolymerization and autorepairing processes of DNA macromolecules at separate of combine, short-time or long-time action of pulsed or stationary ionizing radiation to biological systems","authors":"V. Vysotskii, A. Pinchuk, I. I. Samoylenko","doi":"10.1109/PPC.1999.823797","DOIUrl":"https://doi.org/10.1109/PPC.1999.823797","url":null,"abstract":"The time-dependent dynamics of formation, relaxation and auto-reparation of double DNA breaks by the combined irradiation action and nontraditional processes of degradation were considered. The auto-repairing of double DNA breaks is connected with the peculiarities of long-range interaction of nucleotide charges, atoms and molecules in the intracellular milieu. The properties of intracellular liquid and the characteristics of force interaction between the end pairs of nucleotides in the area of DNA break in response to radiation are changed. Each kind of radiation is characterized by the certain effectiveness of double DNA beaks formation but simultaneously one creates the conditions for their liquidation. On the basis of the analysis and correlation of these processes, time-dependent theory for DNA degradation was created, including hormesis phenomenon, radiation antagonism, the validity of anomaly influence of low and large doses at sharp and chronic radiation and others effects. The qualitative and quantitative correspondence of the theory and experimental results of radiation biology was obtained.","PeriodicalId":11209,"journal":{"name":"Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)","volume":"69 1","pages":"1425-1428 vol.2"},"PeriodicalIF":0.0,"publicationDate":"1999-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85816814","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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