| 摘要 |
<p>The present invention is related to a cyclotron comprising :
- an upper and lower magnet pole (5,6), symmetrically placed with respect to a median plane (3),
- an upper and lower superconducting coil (1,2) arranged around each of said magnetic poles,
- A ring-shaped magnetic return yoke (7), placed around said poles and said coils, so as to form a magnetic circuit,
- a beam chamber (8) between said upper and lower magnetic poles, comprising one or more electrodes (9) configured to accelerate ions moving substantially in said median plane, under the influence of a magnetic field oriented perpendicularly to said median plane, said field being generated by running an electric current through said coils (1,2),
- a cryostat (20),
wherein said ring-shaped magnetic return yoke (7) and said coils (1,2) form a cold mass contained within said cryostat (20), and wherein said cryostat does not contain said upper and lower poles (5,6).</p> |
