The RCNP accelerator facility is equipped with a cyclotron cascade
consisting of two variable-energy multi-particle cyclotrons;
- a K140 Azimuthally-Varying-Field(AVF) cyclotron constructed in 1973,
- a K400 ring cyclotron constructed in 1991.
The maximum acceleration energy of the ring cyclotron is 420 MeV for protons
and 100 MeV/nucleon for heavy ions.
A variety of ion beams are utilized for the research in nuclear physics,
radio chemistry and interdisciplinary research field.
The AVF cyclotron is mainly used as an injector of the ring cyclotron,
and regularly operated for production of radio-isotopes in a stand-alone mode.
An ultrahigh quality beam with an energy spread
ΔE/E of an order of 10-4 is available
for highly precise nuclear physics experiments, realized by the flat-top
acceleration system
of the ring cyclotron and a highly-stabilized cooling-water temperature-control system
of the cyclotron magnets.
The world-record energy resolution of ΔE/E = 5 x 10-5 was achieved
by a sophisticated dispersion matching technique using the spectrometer
called “Grand Raiden”
and the primary dispersive beam transport from the ring cyclotron.
An intense 400 MeV proton beam is supplied to the ultra-cold neutron source
and the muon source called MuSIC for the research in elementary particle physics
and fundamental science.
A radio-active beam is secondarily produced by a heavy ion beam
for the study of nuclear structure and high spin states.
Ring Cyclotron (K=400MeV)
since 1991
Magnet:
Field : max. 1.75T
Frequency：30～52MHz
Dee
voltage：max.
500kV
AVF Cyclotron (K=140MeV)
since 1973Magnet: Field : max. 1.6T
Frequency：6～18MHz
Dee voltage：max. 60kV
