| 摘要 |
In a streak apparatus including a streak tube 1 having a vacuum container 1 a which has a photocathode 3 at its one end and an output surface 6 at its other end, an accelerating electrode 4 for accelerating photoelectrons, a deflecting electrode 5 formed of a pair of electrodes, and a plurality of focusing magnetic flux generators 12 a and 12 b for focusing the photoelectrons emitted from the photocathode 3 , a deflecting voltage generation circuit 10 , an acceleration voltage generation circuit 9 , and drive power supplies 13 a and 13 b for supplying a current to the focusing magnetic flux generators, the plurality of focusing magnetic flux generators 12 a and 12 b form a main focusing electron lens for forming an electron image, formed on the photocathode 3 , on the output surface, and a prefocus lens arranged between the photocathode and main focusing electron lens to focus the photoelectrons, emitted from the photocathode 3, toward the center of the main focusing electron lens.
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