| 摘要 |
PURPOSE:To reduce the drift in the peak anode voltage, output, etc. by arranging a plurality of uniform magnetic steel members radially on the circumference of a focusing ring. CONSTITUTION:Uniform magnetic boards 14 cut into rectangular shape from Fe- Nickel alloy steel board, for example, are arranged radially at an interval of approximately 45 deg. on the circumferential end of a focusing ring 8. Under normal temperature a portion of flux contributing to the magnetron functioning space S is leaked through a uniform magnetic board 14 to a yoke 9, then said leak is decreased as the temperature rises and said decrement is recovered to the flux to said functioning space S. Consequently, the flux in said space S can also be compensated for the temperature change. |
