Ito T, Osakabe M, Ida K, Yoshinuma M, Kobayashi M, Goto M, Murakami S, Isobe M, Kobayashi S, Toi K, Ogawa K, Takeiri Y, Okamura S
National Institute for Fusion Science, Toki 509-5292, Japan.
Rev Sci Instrum. 2010 Oct;81(10):10D327. doi: 10.1063/1.3502331.
A tangential Fast Ion Charge eXchange Spectroscopy is newly applied on a Large Helical Device (LHD) for co/countercirculating fast ions, which are produced by high energy tangential negative-ion based neutral beam injection. With this new observation geometry, both the tangential-neutral beam (NB) and a low-energy radial-NB based on positive ions can be utilized as probe beams of the measurement. We have successfully observed Doppler-shifted H-alpha lights due to the charge exchange process between the probing NB and circulating hydrogen ions of around 100 keV in LHD plasmas.
一种切向快离子电荷交换光谱技术新近应用于大型螺旋装置（LHD），用于测量由基于高能切向负离子的中性束注入产生的共/反向循环快离子。利用这种新的观测几何结构，切向中性束（NB）和基于正离子的低能径向NB都可以用作测量的探测束。我们已经成功观测到由于探测NB与LHD等离子体中约100keV的循环氢离子之间的电荷交换过程而产生的多普勒频移H-α光。
