Nihon University

Tomohiko Asai

Tadafumi Matsumoto

Taichi Seki

Jun'ichi Sekiguchi

Daichi Kobayashi

A magnetized plasmoid injection device including a cylindrical external electrode, a cylindrical internal electrode coaxially disposed inside the external electrode, a plasma generating gas supply unit that supplies plasma generating gas in a pulse shape between the external electrode and the internal electrode, a magnetic field generation unit that applies a magnetic field that generates magnetized plasmoid between the external electrode and the internal electrode, a power supply control unit that applies a discharge voltage between the external electrode and the internal electrode, and an impurity generation unit that contains an impurity in the magnetized plasmoid, the impurity generation unit having a cover electrode that opens to the external electrode, a thin-rod electrode that is located inside the cover electrode and is formed of an impurity, and an impurity generation power supply that applies a voltage to the cover electrode and the thin-rod electrode.

Magnetized plasmoid injection device

Provided is a magnetized coaxial plasma generation device having increased magnetization efficiency and capable of improving power conservation and reducing the thermal load on a coil. The magnetized coaxial plasma generation device generating spheromak plasma comprises: an external electrode (); an internal electrode (); a plasma generation gas supply section (); a power supply circuit (); a bias coil (); a pulse power supply () for the bias coil; a magnetic flux conservation section (); and a control section (). The bias coil () is disposed inside the internal electrode and generates a bias magnetic field between the external and internal electrodes. The pulse power supply () for the bias coil pulse-drives the bias coil. The magnetic flux conservation section () is disposed outside the external electrode. The control section controls the pulse power supply for the bias coil so as to pulse-drive the bias coil for a time sufficient to apply a bias magnetic field necessary to generate the spheromak plasma between the external and internal electrodes and within a time shorter than a skin time of the magnetic flux of the bias magnetic field into the magnetic flux conservation section.

Growing community of inventors

Tokyo, Japan

Tomohiko Asai