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| THPMA089 | Studies of Metallic Ion Beams using ECRIS | ion, plasma, ion-source, extraction | 770 | ||
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Low energy metallic ion beams find wide applications in various research fields especially in materials science, atomic and molecular physics. Several metallic ion beams have been developed successfully using all permanent magnet 10 GHz electron cyclotron resonance (ECR) ion source based low energy ion beam facility (LEIBF) [*] at IUAC. The most important feature of the facility is that the source and all its peripheral components including electronics and vacuum systems are on a high voltage platform (300 kV).The metallic ion beams were developed by different methods e.g. oven, sputtering, insertion and metal ions using volatile compounds (MIVOC). The ion source has been tuned to get optimum intensities of metallic ion beams. The high intensities of low charge state metallic ion beams are suitable to engineer the materials for optical, electrical and structural properties via ion implantation. For the interest of atomic and molecular physics, the high intensities of highly charged metallic ion beams are produced using gas mixing [**] and bias techniques. The charge state distribution studies of various metallic ion beams and gas mixing effect of different gases are presented.
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[*] P. Kumar et.al., Nucl. Instr. and Meth. B, 440 (2006) 246.[**] A. G. Drentje et.al., Rev. Sci. Instrum. 953 (1996) 67. |
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| THPMA114 | Activities on the Nuclear Data Measurement at the Pohang Neutron Facility Based on Electron Linac | electron, target, linac, quadrupole | 800 | ||
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We report the present status of the Pohang Neutron Facility which consists of an electron linear accelerator, a water-cooled Ta target, and a 12-m time-of-flight path. We measured the neutron total cross-sections in the neutron energy range from 0.1 eV to few hundreds eV by using the neutron time-of-flight method. A 6LiZnS(Ag) glass scintillator was used as a neutron detector. The neutron flight path from the water-cooled Ta target to the neutron detector was 12.1 m. The background level was determined by using notch-filters of Co, In, Ta, and Cd sheets. In order to reduce the gamma rays from Bremsstrahlung and those from neutron capture, we employed a neutron-gamma separation system based on their different pulse shapes. The present measurements of Ta, Hf, Ag, and Mo samples are in general agreement with the evaluated data in ENDF/B-VI. The resonance parameters were extracted from the transmission data from the SAMMY fitting and compared with the previous ones.
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| FRXMA01 | Progress of the Laser-Plasma Acceleration Research at KERI | laser, plasma, electron, acceleration | 832 | ||
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There rise great interest worldwide in plasma accelerators driven by ultra-intense lasers or electron beams which make it possible to generate ultra-high gradient acceleration and high quality particle beams in a much more compact size compared with conventional accelerators. A frontier research on laser and plasma accelerators is focused on high energy electron acceleration and ultra-short coherent X-ray and Tera Hertz radiations as their applications. These achievements will provide not only a wide range of sciences with benefits of a table-top accelerator but also a basic science with a tool of ultrahigh energy accelerators probing an unknown extremely microscopic world. Harnessing the recent advance of ultra-intense ultra-short pulse lasers and accelerators, the worldwide research has made a tremendous breakthrough in demonstrating high-energy high-quality particle beams in a compact scale. This talk highlights recent progress of results on laser and plasma based acceleration experiments to quest for physics of acceleration and beam physics in plasma and to present new outlook for applications of laser and plasma accelerators.
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