M. Gazaix, H. Doucet, B. Etlicher, A. Bers, K. Felch, G. Anastaze, L. Vallier
{"title":"Interaction between a thin polyethylene target and a relativistic electron beam","authors":"M. Gazaix, H. Doucet, B. Etlicher, A. Bers, K. Felch, G. Anastaze, L. Vallier","doi":"10.1063/1.331736","DOIUrl":"https://doi.org/10.1063/1.331736","url":null,"abstract":"We investigate theoretically and experimentally the possibility of energy deposition enhancement when a beam interacts with a high-density plasma in the diode. The beam-plasma instability has been studied taking into account the angular spread of the beam, the e-i collisions and the density gradients. The beam (500 kV, 250 kA, 50 ns) interacts with a thin CH2 foil. The plasma expansion from the foil target is found to be symmetric. The temperature, estimated by XRD is 10 eV. The measured parameters (temperature, density, gradients), together with the theoretical study, show that the beam-plasma instability is ineffective in the expanding target.","PeriodicalId":390921,"journal":{"name":"1981 4th International Topical Conference on High-Power Electron and Ion Beam Research & Technology","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117242705","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}
{"title":"Plasma heating by a relativistic electron beam","authors":"G. Janssen, P. D. de Haan, H. Hopman","doi":"10.1063/1.864648","DOIUrl":"https://doi.org/10.1063/1.864648","url":null,"abstract":"We report measurements on the heating of a hydrogen plasma by means of a relativistic electron beam — The beam parameters are: V<inf>b</inf> =600 kV, I<inf>b</inf> = 5 kA, τ<inf>max</inf> = 400 ns. The plasma density was varied between 1 × 10<sup>19</sup> m<sup>−3</sup> and 3 × 10<sup>20</sup> m<sup>−3</sup>. We observed maximum heating at n<inf>e</inf> =8 × 10<sup>19</sup> m<sup>−3</sup>. The corresponding electron temperature is 200 eV.","PeriodicalId":390921,"journal":{"name":"1981 4th International Topical Conference on High-Power Electron and Ion Beam Research & Technology","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1984-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116401308","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}
B. Duborgel, J. Dufour, M. Fedotoff, P. Gouard, A. Devin, C. Peugnet
{"title":"Theoretical and experimental studies of electron deposition in thin targets","authors":"B. Duborgel, J. Dufour, M. Fedotoff, P. Gouard, A. Devin, C. Peugnet","doi":"10.1063/1.331469","DOIUrl":"https://doi.org/10.1063/1.331469","url":null,"abstract":"Experiments performed on CHANTECLAIR to study the absorption of relativistic electron beams in thin foils are discussed. High z target REB interaction is simulated with the TRAJEC code coupled to an hydrodynamic code. TRAJEC calculates electron trajectories in the target's region resulting from macroscopic self beam and diode fields and magnetic field diffused in the target plasma; in this treatment, magnetic field and particle motion are self consistent and the energy deposition at each electron pass through the target is calculated. These simulations indicate that a deposition enhancement factor of about 2 to 3 is obtained in our experiments, with a rear side temperature of 15–25 ev, in good agreement with experimental data.","PeriodicalId":390921,"journal":{"name":"1981 4th International Topical Conference on High-Power Electron and Ion Beam Research & Technology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1982-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131200121","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. Barak, D. Chernon, A. Fisher, H. Ishizuka, N. Rostoker
{"title":"High current Betatron","authors":"G. Barak, D. Chernon, A. Fisher, H. Ishizuka, N. Rostoker","doi":"10.1109/TNS.1981.4332099","DOIUrl":"https://doi.org/10.1109/TNS.1981.4332099","url":null,"abstract":"In a conventional Betatron, space charge limits the electron current during injection. By adding a toroidal magnetic field and injecting electrons with the inductive charging method we expect to increase the current limit by a factor of 104–106. After the beam has been accelerated to high energy the toroidal field is no longer necessary and can be reduced to facilitate extraction of the beam. The effect of the toroidal magnetic field on space charge instabilities is investigated. An experimental Betatron has been constructed with a major radius of 40 cm and a minor radius of 5 cm. On the basis of previous experimental results with inductive charging the current limit should be a few kilo-amperes.","PeriodicalId":390921,"journal":{"name":"1981 4th International Topical Conference on High-Power Electron and Ion Beam Research & Technology","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133685387","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}
{"title":"Filamentation instability in heavy ion beams","authors":"N. Metzler, K. Brueckner, R. Janda","doi":"10.1063/1.863469","DOIUrl":"https://doi.org/10.1063/1.863469","url":null,"abstract":"The filamentation instability of heavy ion beams is investigated. (1) The finite converging intense beam is considered to be focused into a low pressure ICF reactor-chamber. Zero order, as well as higher order filamentation modes, are studied.","PeriodicalId":390921,"journal":{"name":"1981 4th International Topical Conference on High-Power Electron and Ion Beam Research & Technology","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1981-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130520812","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}
{"title":"Non-axisymmetric wave propagation in pulsed power machines","authors":"E. Waisman, Andrew Wilson","doi":"10.1063/1.329938","DOIUrl":"https://doi.org/10.1063/1.329938","url":null,"abstract":"We analyze, in the absence of space charge, non-axisymmetric wave propagation in pulsed power machines in the long wavelength limit (λ >> anode-cathode gap dimensions). The conditions for generalized TEM waves are derived for both straight (coaxial) and convergent (double-disk) transmission lines. We examine the asymmetries resulting from the lack of switch synchronization as it affects the wave propagation and power delivery to a small radius symmetric imploding load. We apply the long wavelength equations to the output water line and vacuum feed sections of a machine resembling BLACKJACK V and calculate the reduction in power delivered to the load as a function of the degree of synchronization.","PeriodicalId":390921,"journal":{"name":"1981 4th International Topical Conference on High-Power Electron and Ion Beam Research & Technology","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114136874","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}