Upgrade of the diagnostic neutral beam injector for the TCV tokamak

Authors :: Karpushov, Alexander N.
Abdrashitov, G.F.
Averboukh, I.I.
Bosshard, P.
Condrea, I.
Duval, B.P.
Ivanov, A.A.
Kolmogorov, V.V.
Mlynar, J.
Perez, A.
Shikhovtsev, I.V.
Shukaev, A.N.
Weisen, H.
Source :: Fusion Engineering & Design. Aug2003, Vol. 66-68, p899-904. 6p.
Publication Year :: 2003
Abstract: A diagnostic neutral beam injector (DNBI) [CRPP report LRP 710/01, CRPP-EPFL, 2001; EPS Conf. Contr. Fusion Plasma Phys., 25A (2001) 365] has been installed on tokamak à configuration variable (TCV) [Plasma Phys. Control Fusion, 36 (1994) B277; Plasma Phys. Control Fusion, 43 (2001) A161; Plasma Phys. Control Fusion, to be published] for the purpose of providing local measurements of plasma ion temperature, velocity and impurity density by Charge eXchange recombination spectroscopy (CXRS) [EPS Conf. Contr. Fusion Plasma Phys., 25A (2001) 365]. The system recently underwent a technical upgrade, which allowed to increase the full neutral beam current density by a factor of two (from 0.5 to 1 A at 52 keV injection energy) and to extend the operational range of the diagnostic. This was achieved by means of a new, larger ion source, with an increased extraction area and corresponding enhancements of the power supplies. [Copyright &y& Elsevier]