| 摘要 |
PROBLEM TO BE SOLVED: To take out electron beams of a plurality of orbits without increasing the size of a main electromagnet by providing a port for taking-out the electron beams on the straight orbits of the electron beams which are emitted from the magnetic field area of the second main electromagnet formed to be larger than that of the first main electromagnet. SOLUTION: The electron beams which are made incident to the magnetic field range of the second main electromagnet 107 is deflected by 180 deg., and draws a second circular arcuate orbit 119. The electron beams along the second orbit 119 is deflected by 180 deg. by the first main electromagnet 106 and passes through a circular arcuate orbit to be emitted to a linear accelerator 108 and is accelerated by the linear accelerator 108 again. Mass is increased in the electron beams in this case so that the third orbit 120 being the larger circular arcuate one is drawn when 180 deg. deflection is obtained by the second main electromagnet 107. The electron beams are deflected by a deflection magnet 109, a target is irradiated with them, X-rays are generated, a visual field range is restricted by a collimator 112 and a testee body set on a diagnosing device is irradiated with the electron beams.
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