CXRS measurements of energetic helium ions in ASDEX Upgrade plasmas heated with a three-ion species ICRH scheme

摘要

Introduction The generation and investigation of energetic helium in present devices can provide insight on how fusion-produced, fast alpha particles will behave in future reactor plasmas. Aside from investigating fusion-produced He (TFTR [1]), a fast He population can be simulated either by He neutral beam injection (NBI) (JET [2]), or by using ion cyclotron resonance heating (ICRH) to accelerate either ~4He-beam ions (JET [3]) or ~3He ions (TFTR [4]). A key element in such studies is the measurement of the fast He populations with charge exchange recombination spectroscopy (CXRS) [1, 2,4]. CXRS measurements of energetic ~3He ions, a new measurement for ASDEX Upgrade (AUG), are presented.