| ชื่อเรื่อง | : | Model for pedestal transport based on suppression of anomalous transport using ω E × B flow shear and magnetic shear |
| นักวิจัย | : | Yutthapong Pianroj , Jeerapat Techakunchaiyanunt |
| คำค้น | : | Fusion , H-mode , Pedestal , Plasma , Tokamak , Transport model , Bohm/gyro-Bohm anomalous , Pedestal transport |
| หน่วยงาน | : | สถาบันวิจัยและให้คำปรึกษาแห่ง มหาวิทยาลัยธรรมศาสตร์ |
| ผู้ร่วมงาน | : | - |
| ปีพิมพ์ | : | 2555 |
| อ้างอิง | : | Journal of the Physical Society of Japan. 81,4 (2012) Art. no. 044502 , 0031-9015 , http://dspace.library.tu.ac.th/handle/3517/6487 |
| ที่มา | : | - |
| ความเชี่ยวชาญ | : | - |
| ความสัมพันธ์ | : | - |
| ขอบเขตของเนื้อหา | : | - |
| บทคัดย่อ/คำอธิบาย | : | A model for describing a pedestal transport in H-mode tokamak plasmas is developed and tested in BALDUR integrated predictive modelling code. The transport model is calculated based on the suppression of an anomalous core transport due to the ω E × B flow shear and magnetic shear. Because of the reduction of transport in the edge region, the pedestal can be formed and evolved. In this work, an anomalous transport is computed using a semi-empirical mixed Bohm/gyro-Bohm anomalous core transport model. The BALDUR code with both core and pedestal transport is used to simulate the time evolution of plasma current, ion and electron temperature, and particle and impurity density profiles for 10 DIII-D H-mode discharges in various plasma scenarios (i.e., gyro-radius scan, density scan, power scan, and elongation scan). It is found that the formation of the pedestal can be observed in all simulations, in which the L-H transition in the simulations is consistent with the L-H transition power threshold model. Moreover, both values at the top of the pedestal and the pedestal width for ion and electron temperatures and particle and impurity densities are all in the ranges expected for the experimental data and agree with the existing pedestal scalings. To quantify the agreement between the simulated core-edge profiles and the corresponding experiment, several statistical analysis techniques, including RMS and offset, are carried out. It is found that the simulated profiles yield an agreement with experimental data in the range from 7.45 to 17.39% for density and temperature, respectively, which is slightly worse than those using experimental data at the top of the pedestal as boundary conditions in BALDUR code. In addition, a cross comparison technique is used to confirm the predictive capability of the model by using a comparison with 12 JET H-mode discharges. It shows that the predicted plasma profiles yield satisfactory agreement. © 2012 The Physical Society of Japan. |
| บรรณานุกรม | : |
Yutthapong Pianroj , Jeerapat Techakunchaiyanunt . (2555). Model for pedestal transport based on suppression of anomalous transport using ω E × B flow shear and magnetic shear.
กรุงเทพมหานคร : สถาบันวิจัยและให้คำปรึกษาแห่ง มหาวิทยาลัยธรรมศาสตร์ . Yutthapong Pianroj , Jeerapat Techakunchaiyanunt . 2555. "Model for pedestal transport based on suppression of anomalous transport using ω E × B flow shear and magnetic shear".
กรุงเทพมหานคร : สถาบันวิจัยและให้คำปรึกษาแห่ง มหาวิทยาลัยธรรมศาสตร์ . Yutthapong Pianroj , Jeerapat Techakunchaiyanunt . "Model for pedestal transport based on suppression of anomalous transport using ω E × B flow shear and magnetic shear."
กรุงเทพมหานคร : สถาบันวิจัยและให้คำปรึกษาแห่ง มหาวิทยาลัยธรรมศาสตร์ , 2555. Print. Yutthapong Pianroj , Jeerapat Techakunchaiyanunt . Model for pedestal transport based on suppression of anomalous transport using ω E × B flow shear and magnetic shear. กรุงเทพมหานคร : สถาบันวิจัยและให้คำปรึกษาแห่ง มหาวิทยาลัยธรรมศาสตร์ ; 2555.
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