Imaging polychromator for density measurements of polystyrene pellet cloud on the Large Helical Device.
Experimental data on spatial distributions of a pellet cloud electron density are necessary for the development of many applications of pellet injection, namely, plasma fuelling, discharge control, and plasma diagnostics. An improved approach of electron density measurements inside the cloud of a polystyrene pellet ablating in hot plasma of the large helical device is described. Density values of (1-30) × 10(16) cm(-3) depending on the background plasma parameters and distance from the solid pellet were measured.
Saint-Petersburg State Polytechnical University, Saint-Petersburg, Russia.
I A
IA
Sharov
Saint-Petersburg State Polytechnical University, Saint-Petersburg, Russia.
V Yu
VY
Sergeev
Saint-Petersburg State Polytechnical University, Saint-Petersburg, Russia.
I V
IV
Miroshnikov
National Institute for Fusion Science, Toki, Japan.
N
N
Tamura
Russian Scientific Centre Kurchatov Institute, Moscow, Russia.
B V
BV
Kuteev
National Institute for Fusion Science, Toki, Japan.
S
S
Sudo