Separated Sector Cyclotron Research Articles

Status Report on GANIL

The GANIL heavy ion accelerator is composed of three isochronous cyclotrons in cascade. The first stage is a small compact cyclotron fitted with a conventional PIG source. The two following stages are two identical Separated Sector Cyclotrons (K = 400). The charge state of the ions is multiplied by a factor of 3.5 by the means of a stripper located between the two SSC's. The beam characteristics in the small injector cyclotron have been observed on a full scale working model at CERN in 1976. The shimming and the trim-coils for the two SSC's have been determined from magnetic measurements made on a one fourth model of the magnets. Recently an RF cavity, scale one third, has been realized and is under experiment. The magnets and vacuum chambers for the SSC's are already ordered. The accelerator is due to be in operation in 1982.

The Status of the South African National Accelerator Centre

The National Accelerator Centre (NAC) is at present being established around a 200 MeV separated-sector cyclotron and an 8 MeV solid-pole injector cyclotron. The design of the SSC magnets has been finalised and tenders for the manufacture of the magnet steel have recently been received. Detailed designs of the central region of the SSC, the magnet vacuum chambers, main coils and the magnet supports have been made. The general layout of the accelerator vaults and adjacent experimental areas have been frozen. Consultant engineers, architects and quantity surveyors have been appointed and initial planning for the building and services has been completed. Final design of the accelerator building is now under way. Progress on these aspects of the project and its present status are reported.

Design Status of a Separated-Sector Cyclotron Booster Accelerator for the Holifield Heavy Ion Research Facility

A separated-sector cyclotron booster accelerator is being designed for the Holifield Heavy Ion Research Facility as a Phase II project to be started in 1978. Phase I of the HHIRF, now under construction, includes a 25 MV tandem electrostatic accelerator, a beam transport and injection system to enable use of the Oak Ridge Isochronous Cyclotron as an energy booster for tandem beams, and some additional experiment areas and associated beam transport systems. The Phase I facility using the ORIC-25 MV tandem combination will provide energies up to about 25 MeV/amu for light ions such as oxygen and more than 5 MeV/amu up to the region of mass 160. The new Phase II separated-sector cyclotron will provide energies up to 100 MeV/amu for light ions and up to 12 MeV/amu for the heaviest ions such as uranium.

A New Multidisciplinary Separated-Sector Cyclotron Facility

A separated-sector cyclotron with a maximum proton energy of 200 MeV has been proposed for a multidisciplinary accelerator facility for the Republic of South Africa. At energies up to 100 MeV, proton and deuteron currents of the order of 100 microamps will be available for routine isotope production and neutron therapy. Light-ion beams for particle physics and chemistry will be delivered with maximum currents of about 10 microamps and maximum energies in excess of 50 MeV per nucleon. Heavy-ion beams of between 15 and 50 MeV per nucleon are planned with maximum intensities of between 10 particle-nanoamps and 1 particle-microamp, depending on the type of ion. This proposal has recently been approved and progress in the design of the cyclotron and related aspects of the proposed facility is reported here.

Cascade Cyclotron Magnet

A brief study of a separated-sector cyclotron has been made. The total weight of a cascade system of the separated-sector cyclotrons is reduced when the beam is accelerated up to a half of the final energy with the injector cyclotron. Such a large injector system has also some unique features other than its weight.

The Radio Frequency System for the Indiana University Isochronous Separated Sector Cyclotron

The Radio Frequency System for the Indiana University Isochronous Separated Sector Cyclotron

Separate Sector Cyclotron Beam Dynamics with Space Charge

Separate Sector Cyclotron Beam Dynamics with Space Charge

GANIL: A Proposal for a National Heavy-Ion Laboratory

Under the control of the French Atomic Energy Commission (CEA) and of the National Institute of Nuclear and Particle Physics (I N2 P3) a multi accelerator system for heavy ions is beeing studied. The heart of this system consists of two identical conventionnal separated-sector cyclotrons K = 400 (SSC 1 and SSC 2); at the output of SSC 1 ions are stripped through a foil, high charge is selected and injected into SSC 2. The injection into SSC 1 will be achieved by a small compact cyclotron or by an 1 MV electrostatic accelerator. As the required beam must be intense and precise (energy resolution and emittance) special attention has been paid for a careful matching of the three stages of acceleration in transversal and longitudinal planes taking into account space charge forces as well as electric and magnetic defects. A set of parameters for the two main machines and their injectors is given.