KAERI, Daejon, Republic of Korea
Many scientists have studied metal nano-particles for newly known optical, electronic and chemical properties. The unique properties of nano-particles have a tendency to relate the particle size and shape. Electron beam have been used for the nano-particle synthesizing and many results were published. Study of nano-particles synthesize by using proton beam is still in the early stages however study for gold, silver, platinum and cobalt nano-particle was in progress. 100 MeV proton linear accelerator, which is by Proton Engineering Frontier Project, Korea Atomic Energy Research Institute, is scheduled to be completed by 2012. Study of nano-particle synthesize by using proton beam will become active due to the completion of 100 MeV proton accelerator and it can be mass-produced because of the large current beam. Finally, industrial applications could become possible. The mechanism of metal nano-particles synthesizing by proton beam irradiation was not completely known. In this study, we investigated the changes of size and shape for metal nano-particle depending on the condition of proton beam irradiation, and concentration of additives by TEM and UV/Vis spectrophotometer.
KAERI, Daejon, Republic of Korea
A 100-MeV, 20-mA high intensity proton linac is to be constructed in 2012 by the PEFP (Proton Engineering Frontier Project) of the Korea Atomic Energy Research Institute, which was started in 2002 with three main objectives; development of high intensity proton linac, development of proton beam utilization technologies, and industrialization of developed technologies. Proton beams with variable energy and current can be provided to the users from various research and application fields such as nano-, bio-, semiconductor-, space-, radiation-, environment-technologies and medical- and basic sciences, etc. through 10 targets rooms, which are assigned specific application fields to meet various user’s beam requirements. Following a brief introduction to the accelerator development, multiple beamline development and the construction works, we will review the achievements of our user program which have been operated over the past 8 years to cultivate and foster proton beam users and beam utilization technologies in diverse R&D fields. In addition, we will discuss the perspectives of the beam utilization in conjunction with design and construction of user facilities.
KAERI, Daejon, Republic of Korea
PEFP (Proton Engineering Frontier Project) has developed a 20~100 MeV/20 mA proton linear accelerator, proton beam utilization technology and accelerator applications, in order to acquire core technologies which are essential to develop future science and secure the industrial competitiveness. In the experimental hall, 10 target rooms will be constructed for the research of radioisotopes, material, medical, neutron source, etc. In the irradiation experiments using proton beam of more than a few MeV energy, radio-activation of targets and equipments can be essentially caused by the proton induced nuclear reactions. Highly radioactive samples occasionally makesome problems or inconveniences concerning with sample handling and post-treatment because we have to wait for the samples to be cooled down under the safe value for radiation protection. So we estimated proton beam irradiation condition of each target room and used samples including equipments, then we calculated radio-activation of each target room by using Monte Carlo N-particle Transport Code.