| Paper | Title | Page |
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| MOPAN042 | Switching Power Supply for Induction Accelerators | 251 |
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| A new particle acceleration method using pulsed induction cavities was introduced in the super-bunch project at KEK. Unlike conventional RF acceleration, this acceleration method separates functions of acceleration and confinement As a result, this acceleration method can be applied for accelerating a wide mass range of particles. However, it is necessary to give a very fast pulsed-excitation to the cavity to perform the induction acceleration. Switching power supplies of high voltage output with very fast pulse-operation is one of the most important key technologies for this new acceleration method. We have developed 20ns rise time pulse at continuous repetition rate of 1MHz using MOS-FET's. Induction cavities were modulated through the 200m long transmission lines. Further development using SI- thyristor achieved 1MHz and 2kV switching in a burst mode operation. SiC devices are also studied for the application and some promising results were obtained. Faster operation will make this new acceleration technology available for small accelerator projects. | ||
| 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. |