Construction of collisional-radiative models and a neutral transport code with accurate internal states of atomic and molecular hydrogen

2016 Fiscal Year Final Research Report

• Project/Area Number: 25400532
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Plasma science
• Research Institution: Shinshu University
• Principal Investigator: SAWADA Keiji 信州大学, 学術研究院工学系, 教授 (40262688)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: 水素原子 / 水素分子 / 衝突輻射モデル / 中性粒子輸送コード / 振動状態 / 回転状態 / 分子活性化再結合 / 非接触プラズマ

Outline of Final Research Achievements

A rovibrationally resolved collisional-radiative model of molecular hydrogen that includes 4,133 rovibrational levels for electronic states whose united atom principal quantum number is below six is developed. The population distribution of the rovibrational in the electronic ground state in a fusion demo detached divertor plasma is investigated by solving the model time-dependently with an initial 300 K Boltzmann distribution. The effective reaction rate coefficients of molecular assisted recombination and of other processes in which atomic hydrogen is produced are calculated using the obtained time-dependent population distribution.
A neutral transport code including the rovibrational excitation of molecule hydrogen induced by atomic hydrogen, and a collisional-radiative model of atomic hydrogen with the levels specified by the principal and azimuthal quantum numbers are also developed.

Free Research Field

プラズマ分光学