Page 10 - Progress minimizing fast-ion charge-exchange loss associated with gas injection on C-2W
P. 10
NBI fueling insufficient to maintain particle inventory
Ionization and CX Rate Coefficients
Balmer-α emission, radial view
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10 14
CX
e-ioniz i-ioniz
10 15
102 103 104
105 106 NB Energy or Te, using Ti:500 [eV]
• 500 A NB atoms injected, ∼400 A captured
• ∼80 A captured via ionization reactions
• ∼180 A warm neutrals ionized before hitting wall
• ≳ 2 kA additional gas atoms required, injected between formation and
outer divertors.
Presenter: Erik Granstedt 7
Rate Coefficient [m3/s]
15 keV 40 keV
