| Paper | Title | Other Keywords | Page |
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| MOPPT015 | Plan of a 70 MeV H− Cyclotron System for the ISOL Driver in the Rare Isotope Science Project | target, cyclotron, ISOL, injection | 64 |
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| A 70 MeV H− cyclotron system has been planned for the rare isotope science project (RISP) in Korea mainly to be used as ISOL driver. The maximum beam current requested is 1 mA, and the beam will be used for the nuclear and neutron science programs. A commercial cyclotron with two extraction ports is to be installed for the facility, and the beam distribution lines have been designed with consideration of radiation shielding. The injection beam line has been also studied to produce pulsed beams in the range of 0.01-1 MHz for the users of neutron science to utilize the time of flight technique. A chopper and collimator system is thought as a feasible scheme, and beam optics calculation has been performed. The cyclotron is scheduled to produce a first beam for the RISP in 2007. | |||
| TUPSH006 | Development of a New Active-Type Gradient Corrector for an AVF Cyclotron | cyclotron, extraction, proton, quadrupole | 230 |
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| A new gradient corrector with active coils has been developed for beam focusing and bending in the extraction region of the RCNP AVF cyclotron. The gradient corrector is a quadrupole type consisting of a pair of a C-type iron yoke. A sixteen-turn hollow conductor was coiled around each side yoke, and the two iron dipoles generate a linear field gradient independently. A field gradient up to 9 T/m is available for focusing a heavy ion beam with magnetic rigidity up to 1.6 T-m. The position of the gradient corrector is manually changeable within ±20 mm from a beam extraction base line. A field measurement was carried out with a Hall-element and we confirmed generation of the designed field gradient under excitation of the main coil. We have succeeded in focusing an extracted beam at an object point of the beam transport optics by a combination of the gradient corrector and a triplet quadrupole magnet following the gradient corrector. Correction of an extracted beam orbit was also demonstrated by optimizing the coil current and position of the gradient corrector. We will report the design and performance of the new gradient corrector. | |||
| WEPPT003 | Beam Optical Simulation in a Proposed Magnetic Einzel Lens | solenoid, ion, beam-transport, electron | 323 |
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| Magnetic scalar potential and field distributions along the central axis of a magnetic einzel lens consisting of a pair of axisymmetric iron yoked anti-solenoids have been evaluated using a simple closed form of analytical expressions. The magnetic field distribution is used to track single charged particles as well as ion beam through lens segmentation method. The method facilitates in evaluation of optical properties as well as aberration coefficients of the lens. Application of such doublet solenoid lens in transporting low energy ion beam introduces minimal rotation of the beam as well as least entangling between transverse phase spaces of the beam. | |||
| WEPPT006 | Design of Achromatic Bends for the High Energy Beam Transport System of HCI at IUAC Delhi | DTL, quadrupole, ion, beam-transport | 332 |
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The high energy beam transport system of the High Current Injector (HCI) being currently developed at IUAC will transport beam of maximum energy ~ 1.8 MeV/u with mass to charge ratio (A/q) equal to 6 from drift tube linac (DTL) to the superconducting LINAC in the zero degree beam line of the existing 15UD Pelletron. The whole transport path (~40 m) consists of four 90 degree bends. Since the beams coming from DTL are expected to have an energy spread of 0.5 %, the magnetic bends have to be achromatic. The transport system is designed to meet the restrictions imposed by the existing beam hall and the other space constraints. The first three 90 degree achromats have the configuration of Q1Q2Q3MQ4MQ3Q2Q1 and the fourth one has configuration of Q1Q2MQ3Q4Q4Q3MQ2Q1 where Q stands for magnetic quadrupole and M stands for 45 degree bending magnets. Each achromat has been designed so that its total length is restricted to 7 m to fit into the available space. The maximum dispersion occurs at the middle of Q4. Standard beam dynamics codes like GICOSY* and TRACE 3D** have been used to design the achromats and details of optics will be presented.
*H. Weick, GICOSY homepage, http://www.linux.gsi.de/~weick/gicosy **K.R. Crandall, TRACE 3-D Documentation, Report LA-11054-MS, Los Alamos, 1987 |
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