| Paper | Title | Page |
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| TUPAN046 | A Modification Plan of the KEK 500MeV Booster to an All-ion Accelerators (An Injector-free Synchrotron) | 1490 |
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A medium-energy synchrotron capable of accelerating all ion species based on a novel technology of the induction synchrotron* has been proposed as an all-ion accelerator (AIA)**. The AIA without any specific injector employs a strong focusing lattice and induction acceleration, driven by novel switching power supplies. All ions, including cluster ions with any charge state, are accelerated in a single accelerator. A plan to modify the existing KEK 500 MeV Booster to the AIA is under consideration. Its key aspects, such as an ion-source, a low-field injection scheme and induction acceleration***, are described. Deep implant of moderate-energy heavy ions provided from the AIA into various materials may create a new alloy in bulk size. Energy deposition caused by the electro-excitation associated with passing of swift ions through the material is known to largely modify its structure. The similar irradiation on metal in a small physical space of less than a mm in diameter and in a short time period less than 100 nsec is known to create a particularly interesting warm dense-matter state. The AIA capable is a quite interesting device as a driver to explore these new paradigms.
* K. Takayama, et al., "Experimental Demonstration of the Induction Synchrotron", PAC07.** K. Takayama, et al., PCT/JP2006/308502 (2006).*** T. Dixit, et al., PAC07. |
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| TUPAN050 | Status of the Induction Acceleration System | 1502 |
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Single proton bunch confined by the barrier voltage was accelerated by the induction step-voltage from 500 MeV to 6 GeV at the KEK-PS on March 2006*. We will present the status with the information about troubles and counter-measures for the induction acceleration system.
* K. Takayama, presented in PAC07. |
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| TUPAN052 | New Beam Optics Design of Injection/Fast Extraction/Abort Lines of J-PARC Main Ring | 1508 |
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| J-PARC Main Ring has three straight sections for injection, slow extraction and fast extraction. Injection line has been redesigned so as to give a higher reliability for the thin septa. The magnetic field can be reduced by adding an extra kicker. New optics for the fast extraction with a larger acceptance has been proposed. In this design, the thin septa are replaced by kickers with a large aperture. Beam with an arbitrary energy can be aborted from opposite side from the fast extraction. An external abort line has been designed to deliver the beam aborted with an arbitrary energy to a dump just by using a static quadrupole doublet for the focus. |