| 摘要 |
In a streak apparatus including a streak tube 1 having a vacuum container 1a 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 12a and 12b 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 13a and 13b for supplying a current to the focusing magnetic flux generators, the plurality of focusing magnetic flux generators 12a and 12b 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. <IMAGE> |
