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國立成功大學「邁向頂尖大學計畫」
延攬優秀人才工作報告表
NCKU’s “Aim for the Top University Project”
Work Report Form for Distinguished Scholars
■續聘continuation of employment □離職resignation
100 年 7 月 13 日更新 受聘者姓名
Name of the Employee 徐啟天 ■男 女
Male Female
聘 期 Period of Employment
from 101 年(y) 7 月(m) 1 日(d) to 102 年(y) 6 月(m) 30 日(d) 研究或教學或科技研發與
管理計畫名稱 The project title of research,
teaching, technology development and management
邁向頂尖大學計畫
計畫主持人
（申請單位主管）
Project Investigator (Head of Department/Center)
向克強
補助延聘編號
Grant Number HUA - - -
一、 研究、教學、科技研發與管理工作全程經過概述。（由受聘人填寫）
Please summarize the entire research, teaching, or science and technology R&D and management work process (To be completed by the employee)
1、 “Neoclassical Theory inside Transport Barriers in Tokamaks”, K.C. Shaing, C.T. Hsu, Phys. Plasmas 19, 022502 (2012)
Inside the transport barriers in tokamaks, ion energy losses sometimes are smaller than the value predicted by the standard neoclassical theory. This improvement can be understood in terms of the orbit squeezing theory in addition to the sonic poloidal E B Mach number Up,m that pushes the tips of the trapped particles to the higher energy. In general, Up,m also includes the poloidal component of the parallel mass flow speed. These physics mechanisms are the corner stones for the transition theory of the low confinement mode (L-mode) to the high confinement mode (H-mode) in tokamaks. Here, detailed transport fluxes in the banana regime are presented using the parallel viscous forces calculated earlier. It is found, as expected, that effects of orbit squeezing and the sonic Up,m reduce the ion heat conductivity. The former reduces it by a factor of |S|3/2 and the later by a factor of R(U2p,m) exp(-U2p,m) with R(U2p,m), a rational function. Here, S is the orbit squeezing factor.
2、 “Theory for neoclassical toroidal plasma viscosity in tokamaks”, K.C. Shaing, M.S. Chu, C.T.
Hsu, S.A. Sabbagh, Jae Chun Seol and Y Sun, Plasma Phys. Control. Fusion 54 (2012) 124033 Error fields and magnetohydrodynamic modes break toroidal symmetry in tokamaks. The broken symmetry enhances the toroidal plasma viscosity, which results in a steady-state toroidal plasma flow. A theory for neoclassical toroidal plasma viscosity in the low-collisionality regimes is developed. It extends stellarator transport theory to include multiple modes and to allow for |m – nq| 1. Here, m is the poloidal mode number, n is the toroidal mode number and q is the safety factor. The bounce averaged drift kinetic equation is solved in several asymptotic limits to obtain
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transport fluxes. These fluxes depend non-linearly on the radial electric field except for those in the 1/ν regime. Here, ν is the collision frequency. The theory is refined to include the effects of the superbanana plateau resonance at the phase space boundary and the finite B drift on the collisional boundary layer fluxes. Analytical expressions that connect all asymptotic limits are constructed and are in good agreement with the numerical results. The flux–force relations that relate transport fluxes to forces are used to illustrate the roles of transport fluxes in the momentum equation. It is shown that the ambipolar state is reached when the momentum equation is relaxed. It is also shown that the origin of the momentum for plasma flow generated without momentum sources is the local unbalance of particles’ momenta and is diamagnetic in nature regardless of the details of the theory.
二、研究或教學或科技研發與管理成效評估（由計畫主持人或單位主管填寫）
Please evaluate the performance of research, teaching or science and technology R&D and management Work: (To be completed by Project Investigator or Head of Department/Center)
(1)是否達到延攬預期目標？
Has the expected goal of recruitment been achieved?
Yes, the goal has been achieved.
(2)研究或教學或科技研發與管理的方法、專業知識及進度如何？
What are the methods, professional knowledge, and progress of the research, teaching, or R&D and management work?
The progress of research is on schedule.
(3)受延攬人之研究或教學或科技研發與管理成果對該計畫(或貴單位)助益如何？
How have the research, teaching, or R&D and management results of the employed person given benefit to the project (or your unit)?
Dr. Hsu has contributed tremendously to the research program on high temperature fusion plasma physics.
(4)受延攬人於補助期間對貴單位或國內相關學術科技領域助益如何？
How has the employed person, during his or her term of employment, benefited your unit or the relevant domestic academic field?
Dr. Hsu’s research could contribute to the future of Taiwan’s energy demand. The results of the research also are important to the fusion energy development around the world.
(5)具體工作績效或研究或教學或科技研發與管理成果：
Please describe the specific work performance, or the results of research, teaching, or R&D and management work:
Dr. Hsu has participated to the two papers on plasma transport theory in tokamaks. One is related to the transport processes in the pedestal region in tokamaks and the other is related to the theory for neoclassical toroidal plasma viscosity in tokamaks. The results of both papers are relevant to the success of the tokamak fusion reactors.
(6)是否續聘受聘人? Will you continue hiring the employed person? ■續聘Yes □不續聘No
此次聘期為 101 年 7 月 1 日至 102 年 6 月 30 日，因 102 年 7 月中斷，所以自 102 年 9 月 1 日起以新聘 申請(聘期為 102 年 9 月 1 日至 103 年 8 月 31 日)。
※ 此報告表篇幅以三～四頁為原則。This report form should be limited to 3-4 pages in principle.
※ 此表格可上延攬優秀人才成果報告繳交說明網頁下載。
This report form can be downloaded in http://scholar.lib.ncku.edu.tw/explain/
