A Proposed National Heavy‐Ion Accelerator at Oak Ridge

Abstract

The proposed National Heavy-ion Laboratory will be provided with a multi-stage accelerator system integrated with the existing Oak Ridge Isochronous Cyclotron (OR1C) facilities. The main accelerator stage is to be a four-sector isochronous cyclotron that will provide beam energies up to 100 MeV/u. Ions may be injected into the large cyclotron from either a 20 MV tandem electrostatic accelerator or from the ORIC. The ion energies range from 100 MeV/u for oxygen to 10 MeV/u for uranium. Maximum beam intensities range from ^ 10 13 particles/second for oxygen to 2 x 10 12 particles/second for uranium. The sector magnet angle for the cyclotron is 52°w hich yields radial and axial focusing frequencies of v r = 1.1-1.2 and v 2 = 0.6-0.8. The field-radius product of the magnet is 3018 kG-cm at a maximum magnetic field of 16 kG. The rf system is tunable over the range 6-14 MHz to accommodate acceleration on harmonics 2-11. Second harmonic resonators are provided to increase the phase acceptance and/or the energy resolution.

A Separated-Sector Cyclotron Post-Accelerator for the Oak Ridge Heavy Ion Laboratory

“…The new jt. ; f Z'-^'C SSC configuration is similar to that described in 2 ), but it is somewhat more compact due to *"'"'• higher ion injection energy and subsequent higher charge state. Fig.…”

Computer Control System for ORIC

“…ORIC has always been a rather complex facility and it is becoming more complex with the addition of new external and internal ion sources, 1 * 2 new experimental areas, and an isotope separator (UNISOR). Also in the National Heavy-Ion Laboratory (NHL) 3 Proposal ORIC is included as an injector. Computer control will be essential, for such an operation.…”