The lowest‐order drift equations are given in a canonical magnetic coordinate form for time‐dependent magnetic and electric fields. The advantages of the canonical Hamiltonian form are also discussed.
给出了与时间相关的磁场和电场的最低阶漂移方程的正则磁坐标形式。讨论了正则哈密顿形式的优点。
{"title":"TIME DEPENDENT DRIFT HAMILTONIAN","authors":"A. Boozer","doi":"10.1063/1.864525","DOIUrl":"https://doi.org/10.1063/1.864525","url":null,"abstract":"The lowest‐order drift equations are given in a canonical magnetic coordinate form for time‐dependent magnetic and electric fields. The advantages of the canonical Hamiltonian form are also discussed.","PeriodicalId":22276,"journal":{"name":"The annual research report","volume":"51 1","pages":"2-13"},"PeriodicalIF":0.0,"publicationDate":"1982-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74870171","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}
Pub Date : 1982-03-01DOI: 10.1016/0167-2789(83)90008-8
Y. Ichikawa, T. Kamimura, Charles F. F. Karney
{"title":"Stochastic Motion of Particles in Tandem Mirror Devices","authors":"Y. Ichikawa, T. Kamimura, Charles F. F. Karney","doi":"10.1016/0167-2789(83)90008-8","DOIUrl":"https://doi.org/10.1016/0167-2789(83)90008-8","url":null,"abstract":"","PeriodicalId":22276,"journal":{"name":"The annual research report","volume":"58 1","pages":"1-35"},"PeriodicalIF":0.0,"publicationDate":"1982-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73785130","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}
Cross sections for one-electron capture by highly stripped ions of Be, B and C from H 2 and Ar are measured at low energies below 10 keV. The cross sections are nearly independent of the collision energy investigated. The distinct oscillation with incident ionic charge q in the cross sections are observed.
{"title":"Cross sections for one-electron capture by highly stripped ions of Be, B and C from H_2 and Ar below 10 keV","authors":"S. Takagi, S. Ohtani, K. Kadota, J. Fujita","doi":"10.1143/JPSJ.52.3759","DOIUrl":"https://doi.org/10.1143/JPSJ.52.3759","url":null,"abstract":"Cross sections for one-electron capture by highly stripped ions of Be, B and C from H 2 and Ar are measured at low energies below 10 keV. The cross sections are nearly independent of the collision energy investigated. The distinct oscillation with incident ionic charge q in the cross sections are observed.","PeriodicalId":22276,"journal":{"name":"The annual research report","volume":"20 1","pages":"1-29"},"PeriodicalIF":0.0,"publicationDate":"1982-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78168281","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}
Pub Date : 1982-03-01DOI: 10.1103/PHYSREVLETT.48.1183
Y. Amagishi, A. Tsushima, M. Inutake
Axisymmetric compressional Alfven (fast) waves, which propagate into a region of an increasing magnetic field in a cylindrical plasma, are observed to be converted into ion-cyclotron (slow) waves via ion-cyclotron resonances.
{"title":"CONVERSION OF COMPRESSIONAL ALFVEN WAVES INTO ION CYCLOTRON WAVES IN INHOMOGENEOUS MAGNETIC FIELDS","authors":"Y. Amagishi, A. Tsushima, M. Inutake","doi":"10.1103/PHYSREVLETT.48.1183","DOIUrl":"https://doi.org/10.1103/PHYSREVLETT.48.1183","url":null,"abstract":"Axisymmetric compressional Alfven (fast) waves, which propagate into a region of an increasing magnetic field in a cylindrical plasma, are observed to be converted into ion-cyclotron (slow) waves via ion-cyclotron resonances.","PeriodicalId":22276,"journal":{"name":"The annual research report","volume":"9 1","pages":"1-14"},"PeriodicalIF":0.0,"publicationDate":"1982-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73887836","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}
Pub Date : 1981-12-28DOI: 10.1103/PHYSREVLETT.47.1899
H. Sugai
An extraordinary wave is normally incident on a large volume magnetoplasma, then below the second gyroharmonic, conversion into short-wavelength Bernstein waves is observed near the upper-hybrid layer. Significant conversion efficiency is attained in the optimum conditions. In the high power incidence, considerable electron heating due to the converted wave is found to be localized in the mode-conversion region.
{"title":"Mode Conversion and Local Heating below the Second Electron Cyclotron Harmonic","authors":"H. Sugai","doi":"10.1103/PHYSREVLETT.47.1899","DOIUrl":"https://doi.org/10.1103/PHYSREVLETT.47.1899","url":null,"abstract":"An extraordinary wave is normally incident on a large volume magnetoplasma, then below the second gyroharmonic, conversion into short-wavelength Bernstein waves is observed near the upper-hybrid layer. Significant conversion efficiency is attained in the optimum conditions. In the high power incidence, considerable electron heating due to the converted wave is found to be localized in the mode-conversion region.","PeriodicalId":22276,"journal":{"name":"The annual research report","volume":"13 1","pages":"2-13"},"PeriodicalIF":0.0,"publicationDate":"1981-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90079065","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}
Heating and current generation due to the lower hybrid wave are studied using particle simulation. In contrast with previous work, where only a single mode is treated, the main interest of this work is focused on the physical problems of a propagation cone consisting of many Fourier‐expanded modes. It is found that the trajectory of the propagation cone is well described up to the lower hybrid resonance layer using both the cold plasma approximation and the WKB method. An ion cross‐field drift due to the ponderomotive force is observed. A main discovery of this work is that the modes in the upper portion of the spectrum of the antenna play a key role in the creation of the ion high‐energy tail. This process cannot be explained by the linear theory and is called the cascade process judging from the time variation of the damping of each mode. The particle model is significantly improved using the elongated grid and the quadratic spatial interpolation. Applications of this model to simulations of other probl...
{"title":"Energy and Momentum Deposition to Plasmas due to the Lower Hybrid Wave by a Finite Source","authors":"N. Nakajima, H. Abe, R. Itatani","doi":"10.1063/1.863729","DOIUrl":"https://doi.org/10.1063/1.863729","url":null,"abstract":"Heating and current generation due to the lower hybrid wave are studied using particle simulation. In contrast with previous work, where only a single mode is treated, the main interest of this work is focused on the physical problems of a propagation cone consisting of many Fourier‐expanded modes. It is found that the trajectory of the propagation cone is well described up to the lower hybrid resonance layer using both the cold plasma approximation and the WKB method. An ion cross‐field drift due to the ponderomotive force is observed. A main discovery of this work is that the modes in the upper portion of the spectrum of the antenna play a key role in the creation of the ion high‐energy tail. This process cannot be explained by the linear theory and is called the cascade process judging from the time variation of the damping of each mode. The particle model is significantly improved using the elongated grid and the quadratic spatial interpolation. Applications of this model to simulations of other probl...","PeriodicalId":22276,"journal":{"name":"The annual research report","volume":"66 1","pages":"1-64"},"PeriodicalIF":0.0,"publicationDate":"1981-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78589711","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}
Pub Date : 1981-10-01DOI: 10.1103/PHYSREVLETT.48.1022
T. Fujimoto, T. Kato
It is shown that, in dense plasmas, dielectronic capture into doubly excited ionic states followed by the ladderlike excitation-ionization chain becomes important in the excitation-ionization process of ions. For an example of a hydrogenlike ion, its contribution to the excitation 1s..-->..2s, 2p and also to the ionization has been evaluated by the method of the quasisteady-state solution to the rate equations. The increase is found to be substantial, i.e., by more than a factor of 2 both for the excitation and ionization rate coefficients.
{"title":"New Excitation and Ionization Mechanism of Ions in Dense Plasmas : The Role of Autoionizing States","authors":"T. Fujimoto, T. Kato","doi":"10.1103/PHYSREVLETT.48.1022","DOIUrl":"https://doi.org/10.1103/PHYSREVLETT.48.1022","url":null,"abstract":"It is shown that, in dense plasmas, dielectronic capture into doubly excited ionic states followed by the ladderlike excitation-ionization chain becomes important in the excitation-ionization process of ions. For an example of a hydrogenlike ion, its contribution to the excitation 1s..-->..2s, 2p and also to the ionization has been evaluated by the method of the quasisteady-state solution to the rate equations. The increase is found to be substantial, i.e., by more than a factor of 2 both for the excitation and ionization rate coefficients.","PeriodicalId":22276,"journal":{"name":"The annual research report","volume":"57 1","pages":"1-13"},"PeriodicalIF":0.0,"publicationDate":"1981-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91316020","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}
Pub Date : 1981-10-01DOI: 10.1103/PHYSREVLETT.47.1902
M. Nakamura, T. Cho, S. Kubo, T. Shimozuma, H. Kawai, Y. Yamazaki, T. Maekawa, Y. Terumichi, Shigetoshi Tanaka, Y. Hamada
By injecting rf power P/sub rf/ near the lower hybrid frequency into an Ohmically heated plasma near the end of tokamak discharge in the WT-2, an rf-driven current-sustained plasma is produced and continues to exist during the rf injection period, the toroidal current (I/sub p/approx.10 kA) being generated by the lower hybrid wave only without the Ohmic power. The efficiency of rf-driven current generation is high and attains I/sub p//P/sub rf/roughly-equal0.9 kA/kW at the plasma density n/sub e/approx. =1.4 x 10/sup 12/ cm/sup -3/, with somewhat lower efficiency at higher density.
在WT-2中，在托卡马克放电结束时，向欧姆加热的等离子体中注入较低混合频率附近的射频功率P/sub rf/，产生射频驱动的持续电流等离子体，并在射频注入期间持续存在，环形电流(I/sub rf/)约为。10 kA)仅由低杂波产生，没有欧姆功率。射频驱动的电流产生效率高，在等离子体密度n/sub / e/左右时达到I/sub p// p/ sub rf/约等于0.9 kA/kW。=1.4 x 10/sup 12/ cm/sup -3/，密度越大效率越低。
{"title":"TOROIDAL PLASMA CURRENT SUSTAINMENT BY LOWER HYBRID WAVES IN THE WT-2 TOKAMAK","authors":"M. Nakamura, T. Cho, S. Kubo, T. Shimozuma, H. Kawai, Y. Yamazaki, T. Maekawa, Y. Terumichi, Shigetoshi Tanaka, Y. Hamada","doi":"10.1103/PHYSREVLETT.47.1902","DOIUrl":"https://doi.org/10.1103/PHYSREVLETT.47.1902","url":null,"abstract":"By injecting rf power P/sub rf/ near the lower hybrid frequency into an Ohmically heated plasma near the end of tokamak discharge in the WT-2, an rf-driven current-sustained plasma is produced and continues to exist during the rf injection period, the toroidal current (I/sub p/approx.10 kA) being generated by the lower hybrid wave only without the Ohmic power. The efficiency of rf-driven current generation is high and attains I/sub p//P/sub rf/roughly-equal0.9 kA/kW at the plasma density n/sub e/approx. =1.4 x 10/sup 12/ cm/sup -3/, with somewhat lower efficiency at higher density.","PeriodicalId":22276,"journal":{"name":"The annual research report","volume":"56 1","pages":"1-14"},"PeriodicalIF":0.0,"publicationDate":"1981-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83929345","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 theoroetical model of the triggering of a solar flare by magnetosonic waves in a neutral sheet plasma is discussed. It is shown that the ponderomotive force due to the magnetosonic waves strongly excites the plamsa convection flow in the magnetic neutral sheet which in turn enhances the tearing instability. The system of basic equations for the tearing mode, including the time-averaged nonlinear effects due to the growth time of the instability is shortened to about 100 s for reasonable magnetosonic wave intensity.
{"title":"A Triggering of Solar Flare by Magnetosonic Waves in a Neutral Sheet Plasma","authors":"J. Sakai, H. Washimi","doi":"10.1086/160129","DOIUrl":"https://doi.org/10.1086/160129","url":null,"abstract":"A theoroetical model of the triggering of a solar flare by magnetosonic waves in a neutral sheet plasma is discussed. It is shown that the ponderomotive force due to the magnetosonic waves strongly excites the plamsa convection flow in the magnetic neutral sheet which in turn enhances the tearing instability. The system of basic equations for the tearing mode, including the time-averaged nonlinear effects due to the growth time of the instability is shortened to about 100 s for reasonable magnetosonic wave intensity.","PeriodicalId":22276,"journal":{"name":"The annual research report","volume":"30 1","pages":"1-30"},"PeriodicalIF":0.0,"publicationDate":"1981-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85951387","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}
Total charge transfer cross sections are calculated for the collisions of Li 3+ and Be 4+ ions with H(1s) atoms in the low energy region ( E <25 keV/amu). The perturbed-stationaly-state method in the impact parameter approximation is used with a basis set of adiabatic one-electron two-center molecular orbitals. For the Li 3+ -H system, a reasonable agreement is found between the present calculation and the recent experiment.
{"title":"Charge Transfer in Collisions of Li^ and Be^ ions with Atomic Hydrogen at Low Impact Energy","authors":"T. Ohyama, Y. Itikawa","doi":"10.1143/JPSJ.51.2982","DOIUrl":"https://doi.org/10.1143/JPSJ.51.2982","url":null,"abstract":"Total charge transfer cross sections are calculated for the collisions of Li 3+ and Be 4+ ions with H(1s) atoms in the low energy region ( E <25 keV/amu). The perturbed-stationaly-state method in the impact parameter approximation is used with a basis set of adiabatic one-electron two-center molecular orbitals. For the Li 3+ -H system, a reasonable agreement is found between the present calculation and the recent experiment.","PeriodicalId":22276,"journal":{"name":"The annual research report","volume":"56 1","pages":"1-20"},"PeriodicalIF":0.0,"publicationDate":"1981-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76192853","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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