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The collisional-radiative model, that has been constructed for the helium plasma in the Sino-United Spherical Tokamak is introduced. The result of the 447.1nm (23P-43S)/492.2nm(21P-41D) and 492.2nm/504.8nm(21P-41S) line ratios is given. The line ratio method that is used for measuring electron temperature Te and density Ne parameters is described. The result from the line ratio method is consistent with the measurement of the 94 GHz interferometer. The method is also validated by comparing the relative population densities of the excited states which are deduced from the CR model and the measured intensity data of helium lines. The factors that brings errors into the diagnostic result are discussed, including the error from the measurements, and those from the uncertainties of the rate coefficients that are used in the CR model and the viewing chord integration characteristic of the optical emission measurement.
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Keywords:
- optical emission spectroscopy /
- collisional-radiative model /
- line ratio method /
- sino-united spherical tokamak
[1] Boivin R F, Kline J L, Scime E E 2001 Phys. Plasmas 8 5303
[2] Niu T Y, Cao J X, Liu L, Liu J Y, Wang Y, Wang L, L Y, Wang K, Zhu Y 2007 Acta Phys. Sin. 56 2330 (in Chinese) [牛田野, 曹金祥, 刘磊, 刘金英, 王艳, 王亮, 吕铀, 王珂, 朱颖 2007 56 2330]
[3] Yu Y Q, Xin Y, Ning Z Y 2011 Chin. Phys. B 20 015207
[4] Zhong W L, Duan X R, Yu D L, Han X Y, Yang L M 2010 Acta Phys. Sin. 59 3336 (in Chinese) [钟武律, 段旭如, 余德良, 韩晓玉, 杨立梅 2010 59 3336]
[5] Pu Y D, Zhang J Y, Yang J M, Huang T X, Ding Y K 2011 Chin. Phys. B 20 015202
[6] O'Mullane M G, Anderson H, Andrew Y, Brix M, Giroud C, Meigs A G, Proschek M, Summers H P, Zastrow K D, contributors to the FEDA-JET workprogramme 2002 Advanced Diagnostics for Magnetic and Inertial Fusion (Varenna: Springer) p67
[7] Goto M 2003 J. Quant. Spectrosc. Radiat. Transfer 76 331
[8] Schweer B, Mank G, Pospieszczyk A, Brosda B, Pohlmeyer B 1992 J. Nucl. Mater. 196-198 174
[9] Schmitz O, Beigman I L, Vainshtein L A, Schweer B, Kantor M, Pospieszczyk A, Xu Y, Krychowiak M, Lehnen M, Samm U, Unterberg B, the TEXTOR team 2008 Plasma Phys. Control. Fusion 50 115004
[10] Field A R, Carolan P G, Conway N J, O'Mullane M G 1999 Rev. Sci. Instrum. 70 355
[11] Hidalgo A, Tafalla D, Brañas B, Tabarés F L 2004 Rev. Sci. Instrum. 75 3478
[12] Ahn J W, Craig D, Fiksel G, Den Hartog D J, Anderson J K, O'Mullane M G 2007 Phys. Plasmas 14 083301
[13] Fujimoto T 1979 J. Quant. Spectrosc. Radiat. Transfer 21 439
[14] Li J, Xie W P, Huang X B, Yang L B, Cai H C, Pu Y K 2010 Acta Phys. Sin. 59 7922 (in Chinese) [李晶, 谢卫平, 黄显宾, 杨礼兵, 蔡红春, 蒲以康 2010 59 7922]
[15] Tang J W, Huang D Z, Yi Y B 2010 Acta Phys. Sin. 59 7769 (in Chinese) [唐京武, 黄笃之, 易有报 2010 59 7769]
[16] He Y X 2002 Plasma Sci. Technol. 4 1355
[17] Wang W H, He Y X, Gao Z, Zeng L, Zhang G P, Xie L F, Yang X Z, Feng C H, Wang L, Xiao Q, Li X Y 2005 Plasma Phys. Control. Fusion 47 1
[18] Ralchenko Y, Janev R K, Kato T, Fursa D V, Bray I, de Heer F J 2008 At. Data Nucl. Data Tables 94 603
[19] Verner D A, Ferland G J 1996 arXiv:astro-ph/9509083 [astro-ph]
[20] Aldrovandi S M V, Péquignot D 1973 Astron. Astrophys. 25 137
[21] Shull J M, Van Steenberg M 1982 Ap. J. Suppl. Ser. 48 95
[22] Arnaud M, Rothenflug R 1985 Astron. Astrophys. Suppl. Ser. 60 425
[23] Summers H P, Dickson W J, O'Mullane M G, Badnell N R, Whiteford A D, Brooks D H, Lang J, Loch S D, Griffin D C 2006 Plasma Phys. Control. Fusion 48 263
[24] Chung H K, Chen M H, Morgan W L, Ralchenko Y, Lee R W 2005 High Energy Denisty Phys. 1 3
[25] Boivin R F, Loch S D, Ballance C P, Branscomb D, Pindzola M S 2007 Plasma Sources Sci. Technol. 16 470
[26] Burgos J M M, Schmitz O, Loch S D, Ballance C P 2012 Phys. Plasmas 19 012501
[27] Fujimoto T, Sawada K, Takahata K, Eriguchi K, Suemitsu H, Ishii K, Okasaka R, Tanaka H, Maekawa T, Terumichi Y, Tanaka S 1989 Nucl. Fusion 29 1519
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[1] Boivin R F, Kline J L, Scime E E 2001 Phys. Plasmas 8 5303
[2] Niu T Y, Cao J X, Liu L, Liu J Y, Wang Y, Wang L, L Y, Wang K, Zhu Y 2007 Acta Phys. Sin. 56 2330 (in Chinese) [牛田野, 曹金祥, 刘磊, 刘金英, 王艳, 王亮, 吕铀, 王珂, 朱颖 2007 56 2330]
[3] Yu Y Q, Xin Y, Ning Z Y 2011 Chin. Phys. B 20 015207
[4] Zhong W L, Duan X R, Yu D L, Han X Y, Yang L M 2010 Acta Phys. Sin. 59 3336 (in Chinese) [钟武律, 段旭如, 余德良, 韩晓玉, 杨立梅 2010 59 3336]
[5] Pu Y D, Zhang J Y, Yang J M, Huang T X, Ding Y K 2011 Chin. Phys. B 20 015202
[6] O'Mullane M G, Anderson H, Andrew Y, Brix M, Giroud C, Meigs A G, Proschek M, Summers H P, Zastrow K D, contributors to the FEDA-JET workprogramme 2002 Advanced Diagnostics for Magnetic and Inertial Fusion (Varenna: Springer) p67
[7] Goto M 2003 J. Quant. Spectrosc. Radiat. Transfer 76 331
[8] Schweer B, Mank G, Pospieszczyk A, Brosda B, Pohlmeyer B 1992 J. Nucl. Mater. 196-198 174
[9] Schmitz O, Beigman I L, Vainshtein L A, Schweer B, Kantor M, Pospieszczyk A, Xu Y, Krychowiak M, Lehnen M, Samm U, Unterberg B, the TEXTOR team 2008 Plasma Phys. Control. Fusion 50 115004
[10] Field A R, Carolan P G, Conway N J, O'Mullane M G 1999 Rev. Sci. Instrum. 70 355
[11] Hidalgo A, Tafalla D, Brañas B, Tabarés F L 2004 Rev. Sci. Instrum. 75 3478
[12] Ahn J W, Craig D, Fiksel G, Den Hartog D J, Anderson J K, O'Mullane M G 2007 Phys. Plasmas 14 083301
[13] Fujimoto T 1979 J. Quant. Spectrosc. Radiat. Transfer 21 439
[14] Li J, Xie W P, Huang X B, Yang L B, Cai H C, Pu Y K 2010 Acta Phys. Sin. 59 7922 (in Chinese) [李晶, 谢卫平, 黄显宾, 杨礼兵, 蔡红春, 蒲以康 2010 59 7922]
[15] Tang J W, Huang D Z, Yi Y B 2010 Acta Phys. Sin. 59 7769 (in Chinese) [唐京武, 黄笃之, 易有报 2010 59 7769]
[16] He Y X 2002 Plasma Sci. Technol. 4 1355
[17] Wang W H, He Y X, Gao Z, Zeng L, Zhang G P, Xie L F, Yang X Z, Feng C H, Wang L, Xiao Q, Li X Y 2005 Plasma Phys. Control. Fusion 47 1
[18] Ralchenko Y, Janev R K, Kato T, Fursa D V, Bray I, de Heer F J 2008 At. Data Nucl. Data Tables 94 603
[19] Verner D A, Ferland G J 1996 arXiv:astro-ph/9509083 [astro-ph]
[20] Aldrovandi S M V, Péquignot D 1973 Astron. Astrophys. 25 137
[21] Shull J M, Van Steenberg M 1982 Ap. J. Suppl. Ser. 48 95
[22] Arnaud M, Rothenflug R 1985 Astron. Astrophys. Suppl. Ser. 60 425
[23] Summers H P, Dickson W J, O'Mullane M G, Badnell N R, Whiteford A D, Brooks D H, Lang J, Loch S D, Griffin D C 2006 Plasma Phys. Control. Fusion 48 263
[24] Chung H K, Chen M H, Morgan W L, Ralchenko Y, Lee R W 2005 High Energy Denisty Phys. 1 3
[25] Boivin R F, Loch S D, Ballance C P, Branscomb D, Pindzola M S 2007 Plasma Sources Sci. Technol. 16 470
[26] Burgos J M M, Schmitz O, Loch S D, Ballance C P 2012 Phys. Plasmas 19 012501
[27] Fujimoto T, Sawada K, Takahata K, Eriguchi K, Suemitsu H, Ishii K, Okasaka R, Tanaka H, Maekawa T, Terumichi Y, Tanaka S 1989 Nucl. Fusion 29 1519
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