| 摘要 |
This device makes it possible to achieve upon a target of predetermined position, the simultaneous focusing of a beam of accelerated particles, in two mutually perpendicular planes, this, whatever the energies of said particles. The device comprises two electromagnets E1 and E2 whose entry and exit faces are parallel with one another, and a third electromagnet E3 whose entry and exit faces are at an angle gamma . Relationships are given to determine the different parameters defining the dimensions and positions of the electromagnets in relation to one another being linked by determinate relationships. The device can be utilized in physical and biological researches, as well as in medical irradiation units.
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