Patent attributes
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 (1); an internal electrode (2); a plasma generation gas supply section (3); a power supply circuit (4); a bias coil (5); a pulse power supply (6) for the bias coil; a magnetic flux conservation section (7); and a control section (8). The bias coil (5) is disposed inside the internal electrode and generates a bias magnetic field between the external and internal electrodes. The pulse power supply (6) for the bias coil pulse-drives the bias coil. The magnetic flux conservation section (7) 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.
