On revisited models of L-H transition for tokamak plasmas

Models corresponding to L/H transition in tokamak plasmas are revisited. Values for the thickness of the meso-phase and for the range of the control parameter in the bifurcation region are obtained. We shown that in the collisional case the double hysteresis is absent when the control parameter is positive and there are critical values of the effective frequency and electron diffusivity for the existence of a simple bifurcation. The influence of the impurity flux on the radial electric field bifurcation and the time behaviour of the later on the basis of a tangent hyperbolic time-dependent ion temperature were also studied. SCOPUS: cp.j info:eu-repo/semantics/published Read more... Abstract: Models corresponding to L/H transition in tokamak plasmas are revisited. Values for the thickness of the meso-phase and for the range of the control parameter in the bifurcation region are obtained. We shown that in the collisional case the double hysteresis is absent when the control parameter is positive and there are critical values of the effective frequency and electron diffusivity for the existence of a simple bifurcation. The influence of the impurity flux on the radial electric field bifurcation and the time behaviour of the later on the basis of a tangent hyperbolic time-dependent ion temperature were also studied. SCOPUS: cp.j info:eu-repo/semantics/published img000 1 img001 2 img002 3 img003 4 img004 5 img005 6 img006 7 img007 8 img008 9 img009 10 img010 11 img011 12 img012 13 img013 14 img014 15 img015 16 img016 17 img017 18 img018 19 img019 20 img020 21 img021 22 img022 23 img023 24 img024 25 img025 26 img026 27 img027 28 img028 29 img029 30 img030 31 img031 32 img032 33 img033 34 img034 35 img035 36 img036 37 img037 38 img038 39 img039 40 img040 41 img041 42 img042 43 img043 44 img044 45 img045 46 img046 47 img047 48 img048 49 img049 50 img050 51 img051 52 img052 53 img053 54 img054 55 img055 56 img056 57 img057 58 img058 59 img059 60 img060 61 img061 62 img062 63 img063 64 img064 65 img065 66 img066 67 img067 68 img068 69 img069 70 img070 71 img071 72 img072 73 img073 74 img074 75 img075 76 img076 77 img077 78 img078 79 img079 80 img080 81 img081 82 img082 83 img083 84 img084 85 img085 86 img086 87 img087 88 img088 89 img089 90 img090 91 img091 92 img092 93 img093 94 img094 95 img095 96 img096 97 img097 98 img098 99 img099 100 img100 101 img101 102 img102 103 img103 104 img104 105 img105 106 img106 107 img107 108 img108 109 img109 110 img110 111 img111 112 img112 113 img113 114 img114 115 img115 116 img116 117 img117 118 img118 119 img119 120 img120 121 img121 122 img122 123 img123 124 img124 125 img125 126 img126 127 img127 128 img128 129 img129 130 img130 131 Ce livre donne les bases de la peinture et du dessin de paysages, et présente les techniques essentielles, traditionnelles ou numériques, permettant de réaliser les images à la fois fantastiques et vraisemblables. L'ouvrage propose ensuite de suivre la construction par étapes d'une quinzaine de mondes fantastiques. Il s'achève par une galerie d'oeuvres imaginées par des artistes fantasy actuels