Home / Store / Journals / Electronic Articles / Fusion Science and Technology / Volume 63 / Number 1T / Pages 343-345
K. Furutachi et al.
Fusion Science and Technology / Volume 63 / Number 1T / Pages 343-345
Format:electronic copy (download)
In the tandem mirror GAMMA 10, a gold neutral beam probe (GNBP) has been developed to measure the local electrostatic potential and electric field of the central plasma. The potentials at two points of which separation is about 1cm can be measured simultaneously with high time resolution. The estimation error of the potential is reduced to be ±15V using a new fitting function for the secondary beam profile. The electric field of the plasma maintained by ICRF only (~240 kW) is a little negative (about -5 V/cm), and it increased by about 20 V/cm and became positive due to the plug ECH with the power of 300 kW.
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