| 摘要 |
PURPOSE:To simplify structure by forming an anode with double helical coils and making a current flow reversely in said double helical coils so as to cover a helical magnetic field. CONSTITUTION:An anode 2 is formed with double helical coils (a) and a current I is made flow reversely in it to generate a helical magnetic field in a discharge room. An ionized plasma produced in the discharge room is recombined on the wall surface of a discharge container 8 and either disappear or is reflected. The wall surface of the discharge container 8 is covered with a helical magnetic field, to move electrons by the line of magnetic force reducing a recombinating zone. Thus, the anode is formed in an integrated form with the double helical coil, eliminating the need of separate fixing method.
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