  A normal-conducting carbon-ion synchrotron design for cancer therapy is
proposed. The lattice design is based on the double-bend achromat lens with
additional quadrupole magnets. The proposed synchrotron design is compact with
a circumference of 55 meters. The lattice is tuned for slow extraction at the
third integer resonance and the optical functions are optimised with
considerations for reducing the power consumption during operation.
