II-2 ࣎ࢷࣤࢨࣔࣜゝῼ࣬㞹ሔ࡛ࣈࣚࢫ࣏㛚ࡋ㎲ࡴ◂✪ Diagnostics of Plasma-Confining Potentials for Improving Plasma Confinement due to Electric Fields ᖲ⏛ ┷ྍ㸡࣏࢝ࣤ 10 ࢡ࣭ࣜࣈ ➻ἴኬᏕࣈࣚࢫ࣏◂✪ࢬࣤࢰ࣭ HIRATA Mafumi, GAMMA 10 Group Plasma Research Centre, University of Tsukuba ☚ሔ᪁ᘟ࡞ࡻࡾࣈࣚࢫ࣏㛚ࡋ㎲ࡴ⨠࡞࠽࠷࡙ࠉ㞹న/㞹ሔ࡞ࡻࡾࣈࣚࢫ࣏㛚ࡋ㎲ࡴᛮ⬗ ࡡྡྷ୕ࡢࠉ࣐࣭ࣚᆵ├⥲⣌⨠ࡢࡵ࡛ࡻࡽࠉITER ➴ࡡࢹ࣏࢜ࢠ࣬ࣉࣛ࢜ࣜᆵ⎌≟⣌ࣈࣚࢫ ࣏㛚ࡋ㎲ࡴ⨠ࡵྱࡴᗀࡂᬉ㐚Ⓩ࡚㢟ⴥࣈࣚࢫ࣏㛚ࡋ㎲ࡴࡡᨭၻ࣬ྡྷ୕᪁Ἢ࡚࠵ࡽࠉⴥ ࡊ࠷㛚ࡋ㎲ࡴᛮ⬗ࡡྡྷ୕ぜࡼࡿ࡙࠷ࡾࠊ≁࡞ࢹ࣏࢜ࢠ࣬ࣉࣛ࢜ࣜᆵࣈࣚࢫ࣏࡚ࡢࠉ㧏ࣈ ࣚࢫ࣏㛚ࡋ㎲ࡴᨭၻ H ࣓࣭ࢺࡷࠉᙼ᪁ྡྷ࢙ࢾ࣭ࣜ࢟㛚ࡋ㎲ࡴࢅྡྷ୕ࡈࡎࡾහ㒂㍲㏞㝸ባ 㸝ITB㸞ࡡᙟᠺⓆぜࡈࡿࡒࠉࡐࡡ∸⌦ᶭᵋ࡞ࡗ࠷࡙ࡢ࠷ࡱࡓ࡞༎ฦよ᪺ࡈࡿࡒ࡛ࡢゕ࠻ ࡍࠉ㞹న/㞹ሔ࡞ࡻࡾࣈࣚࢫ࣏㛚ࡋ㎲ࡴྡྷ୕ࡡ◂✪ࡢࠉᰶ⼝ྙ࢙ࢾ࣭ࣜ࢟ࡡᐁ⏕࡞ྡྷࡄ࡙ ᚪさྊḖ◂✪ㄚ㢗࡚࠵ࡾࠊ ࡆࡿ࡞ᑊࡊࠉ⨠❻㒂ࢅᣚࡗ࣐࣭ࣚᆵᐁ㥺⨠ࡢࠉ㞹Ꮔࢦࢠࣞࢹࣞࣤຊ⇍(ECH)࡞ࡻࡽ 㞹Ꮔࢅ㐽ᢝⓏ࡞㧏Ὼ㹺㧏㏷ࡊࠉ࣐࣭ࣚ❻㒂࡞ᑊࡊ㞹Ꮔࡡୌ㒂ࢅࣆ࣭࡛ࣞࡊ࡙Ὦࡿฝࡈࡎࠉ ࡆࡿ࡞ࡻࡽࣈࣚࢪࡡ㞹న/㞹ሔࢅ⮤ᅹ࡞ᙟᠺ㹺โᚒ࡚ࡀࡾ࡛࠷࠹≁㛏ࢅᣚࡖ࡙࠽ࡽࠉࡆࡿࢅ Ὡ࠾ࡊ࡙ࠉᙟᘟࣈࣚࢫ࣏⨠࡞ࡵᬉ㐚Ⓩ∸⌦ᶭᵋよ᪺ࢅ᥆㐅ࡊ࡙࠷ࡾࠊ[1-3] ≁࡞㞹న࡛ࣈࣚࢫ࣏㍲㏞ࡡ∸⌦ᶭᵋࢅよ᪺ࡌࡾ࡛࠷࠹ふⅤ࠾ࡼࠉࣈࣚࢫ࣏㛚ࡋ㎲ࡴᨭၻ ࢅフ౮ࡌࡾࡒࡴࡡࣈࣚࢫ࣏チ᩷Ἢ࡛ࡊ࡙ࠉ≁࡞༟ୌࣈࣚࢫ࣏㹺ࢨࣘࢴࢹ࡚㞹నࡡ✭㛣ฦᕱゝ ῼ࡛ࣈࣚࢫ࣏㛚ࡋ㎲ࡴຝᯕࢅ᳠ゞࡌࡾࡒࡴࡡ࢛ࣤ㹺࢙ࢾ࣭ࣜ࢟㹺ࢪ࣋ࢠࢹࣜࡡ✭㛣ฦᕱゝ ῼࢅ⾔࠹❻⢇Ꮔゝῼჹ࢙࣬ࢾ࣭ࣜ࢟ฦᯊჹ࡛ࣝࣈࣚࢫ࣏㍲㏞ࢅ᳠ゞࡌࡾࡒࡴࡡ࣏ ࢠࣞࢲࣔࣤࢾࣜࣈ࣭ࣝࢹ࣬༖ᑙమ᳠ฝჹࢅ⏕࠷ࡒ X ⥲ཀྵࡦ୯ᛮ⢇Ꮔࡡ㸧ḗඔ᧔ാࢅ⾔࠷ࠉ 㞹ሔᯕࡒࡌࣈࣚࢫ࣏㛚ࡋ㎲ࡴຝᯕࡡレ⣵✪᪺ࢅ㐅ࡴ࡙࠷ࡾࠊ[4,5] ᮇሒ࿈࡚ࡢࠉࡆࡿࡼࡡ∸⌦ᶭᵋよ᪺ࡡࡒࡴࡡゝῼჹࡡⓆᒈ࡞ࡗ࠷࡙㏑ࡾ࡛භ࡞ࠉࡐࡡ ⤎ᯕ࡛ࡊ࡙ᚋࡼࡿࡒ㸝㸦㸞᩺ᆵゝῼჹࣝ࡞ࡻࡾ✭㛣Ⓩ࣬㛣Ⓩ࡞ንࡌࡾ࢛ࣤ㛚ࡋ ㎲ࡴ㞹న࡛❻࢛ࣤ㞹Ὦ࠾ࡼࠉ㞹Ꮔࢦࢠࣞࢹࣞࣤຊ⇍(ECH)ࣂ࣭࣠ࡡቌኬ➴࡞ఔ࠹ 㞹నࡡ᛬㐅ᒈ[ᚉᮮࡡ⣑ 4 ಶࡡ࢛ࣤ㛚ࡋ㎲ࡴ㧏㞹న(3 kV)ࢅ㐡ᠺ]࡞ࡻࡾࠉᙁ࠷ᙼ᪁ྡྷ㞹ሔ ࢨ࣭(dEr/dr)ࡡ⏍ᠺࠉࡐࡿ࡞ఔ࠹࣏࢝ࣤ 10 ࢬࣤࢹࣚࣜ㒂࣬ࣈࣚࢫ࣏❻㒂୦㒂࡞࠽ࡄࡾ ິࡡᢒโ[2]ࠉཀྵࡦࣈࣚࢫ࣏㛚ࡋ㎲ࡴࡡᨭၻ࡞ᑊࡌࡾᮇ㈻Ⓩຝᯕ࡞ࡗ࠷࡙[3]ࠉ୕オࡡරమ Ⓩᐁ㥺ౚ࡛ࡊ࡙♟ࡌࠊࡆࡡ⤎ᯕࢅᚺ⏕ࡊࠉ㸝㸧㸞࣐࣭ࣚᆵ⨠࡞ࡻࡾิࡴ࡙ࡡࠔᙼ᪁ྡྷ㍲ ㏞㝸ባࠕࡡ⨠❻㒂ࢅὩ⏕ࡊࡒ⬗ິโᚒࢅࠉࣁࣛ㒂࢛ࣆ㹺ࢠࢨࢪ ECH ࡞ࡻࡽᙟᠺࡊࡒ ළ⎌≟ࡡ㧏Ὼ㞹Ꮔᒒ࡞ࡻࡾࢬࣤࢹࣚࣜ㒂㞹ᏄὮࢅ⏍ᠺࡊ࡙ᐁ᪃ࡊࡒࠊ㞹Ꮔࡡୌ㒂ࡢ❻ ࡊᙼ᪁ྡྷ࡞ළ⎌≟ࡡᑻᡜ୦ᴗᛮ㞹నࡡࣁࣤࣈ/㞹నࣅ࣭ࢠࢅషࡽࠉࡐࡡ୦ഁ࡞ᙟᠺࡈࡿࡒཬ ᑊ➚ྒࡡ Er ࡞ࡻࡾ E×B ࣆ࣭ࣞࡡཬ㌹ࠉཀྵࡦ ᙁ࠷ Er ࢨ࣭/㧏࣍ࣜࢷࢨࢷ࣭ᙟᠺࢅ⾔ ࠷ࠉࠔᙼ᪁ྡྷ㍲㏞㝸ባࠕࡡ⏍ᠺ࡛ὮῸࡡᢒโ࣬ᙼ᪁ྡྷ㍲㏞ᢒโ࡞ࡻࡾ㛚ࡋ㎲ࡴᨭၻ㉫ ࡆࡾࡆ࡛ゝῼࡈࡿࡒࠊᮇゝῼౚ࡞ࡗ࠷࡙ెࡎ࡙ሒ࿈ࡌࡾࠊ [1] T. Cho et al., Physical Review Letters 97 (2006) 055001. [2] T. Cho et al., Physical Review Letters 94 (2005) 085002. [3] T. Cho et al., Nuclear Fusion 45 (2005) 1650. [4] M. Hirata et al., Trans. Fusion Science and Technology 47 (2005) 215. [5] M. Hirata et al., Review of Scientific Instruments 75 (2004) 3631.
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