High field side launch of RF waves: A new approach to reactor actuators
High field side launch of RF waves: A new approach to reactor actuators
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DOI：
10.1063/1.4936482
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发表时间：
2015-12
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通讯作者：
G. Wallace;S. Baek;P. Bonoli;I. Faust;B. LaBombard;Y. Lin;R. Mumgaard;R. Parker;S. Shiraiwa;R. Vieira;D. Whyte;S. Wukitch
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作者：
G. Wallace;S. Baek;P. Bonoli;I. Faust;B. LaBombard;Y. Lin;R. Mumgaard;R. Parker;S. Shiraiwa;R. Vieira;D. Whyte;S. Wukitch
从托卡马克的高场侧（HFS）发射射频（RF）波相对于低场侧（LFS）发射在波物理和等离子体材料相互作用（PMI）两者方面提供显著优势。对于低杂波（LH）波，较高的磁场打开了波可达性（n ω p/ω>1-ω pi 2/ω2+ω pe 2/ω ce 2 +ωpe/ω 2）之间的窗口。|ωce|）和强电子朗道阻尼（n = 30/Te，Te单位为keV）的条件，使得来自HFS的LH波穿透到燃烧等离子体的核心，而来自LFS的发射波被限制在等离子体的外围。在较高的Te下吸收的波的较低的n值也产生较高的电流驱动效率。在离子回旋频率范围（ICRF）中，HFS发射允许直接进入模式转换层，其中模式转换波强烈吸收热电子和离子，从而避免产生高能少数离子尾。湍流热量和粒子通量的HFS的情况下，特别是在…
Launching radio frequency (RF) waves from the high field side (HFS) of a tokamak offers significant advantages over low field side (LFS) launch with respect to both wave physics and plasma material interactions (PMI). For lower hybrid (LH) waves, the higher magnetic field opens the window between wave accessibility (n∥≡ck∥/ω>1−ωpi2/ω2+ωpe2/ωce2+ωpe/|ωce|) and the condition for strong electron Landau damping (n∥∼30/Te with Te in keV), allowing LH waves from the HFS to penetrate into the core of a burning plasma, while waves launched from the LFS are restricted to the periphery of the plasma. The lower n∥ of waves absorbed at higher Te yields a higher current drive efficiency as well. In the ion cyclotron range of frequencies (ICRF), HFS launch allows for direct access to the mode conversion layer where mode converted waves absorb strongly on thermal electrons and ions, thus avoiding the generation of energetic minority ion tails. The absence of turbulent heat and particle fluxes on the HFS, particularly in...