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The K500 Cyclotron is capable
of supplying a variety of ion beams to the experiments at the Cyclotron
Institute. Starting from the ECR ion sources, ion beams of the very
lightest elements to ion beams of the very heaviest of elements
can be accelerated by the cyclotron to high energies. Beam energies
for protons (ionized hydrogen) can range from 8 MeV to 70 MeV, while
energies for uranium ions can range from 500 MeV (2MeV per nucleon)
to 3.5 GeV (15 MeV per nucleon).
At the heart of our cyclotron
is a superconducting magnet whose intense magnetic field holds the
ions in orbits between its poles. The 50-kilogauss magnetic field
is generated by 800 Amperes of electrical current carried by 5500
turns (25 miles) of niobium-titanium superconducting wire in a coil
surrounded by 100 tons of steel. The acceleration of the ions is
accomplished by intense, rapidly alternating electric fields generated
by a 240-kilowatt radio-frequency system and impressed upon hollow
copper structures called dees located between the poles of the magnet.
The generation, injection, acceleration and delivery to target of
the ions takes place in high vacuum, while the path and focus of
the beam outside the cyclotron is controlled by high-field, electromagnets.
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