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남성모,Jaemin Han,Yong Joo Rhee,Yong-Ho Cha,Yong Woo Lee,Jung Ho Mun,이성만,Sungok Kwon,Hyungki Cha 한국물리학회 2010 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.56 No.1
Heteronuclear clusters recently obtained interest for their own ability to generate enough highenergy ions to produce fusion neutrons efficiently with a table-top-sized laser system. A neutron generation experiment with deuterated methane (CD4) clusters exposed to a femtosecond laser beam (620 mJ, 28 fs) was done. The relation of the ion energy distribution to the cluster size was studied. By analyzing time-of-flight ion signals, neutron yield was estimated to be 2×105 per laser shot.
High-Energy Ion Emission from Deuterium Clusters by Using an Intense Femtosecond Laser
Sungmo Nam,Duck-Hee Kwon,Hyungki Cha,Jaemin Han,Jung Ho Mun,Sungman Lee,Sungok Kwon,Yong Joo Rhee,Yong Woo Lee,Yong-Ho Cha 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.4
The interaction of a femtosecond laser pulse with deuterium clusters was experimentally studied. The prepulse and the amplified spontaneous emission (ASE) effects on laser absorption and ion emission were measured with the ASE time width controlled. We also measured the spatial distribution of ions along the plasma channel produced from laser interaction with clusters. We performed an experiment to generate neutrons by using laser-induced nuclear fusion, d(d, n)³He. A 10-TW femtosecond laser beam (280 mJ, 30 fs) was focused onto deuterium gas clusters and produced ions accelerated by Coulomb explosion, which resulted in a neutron yield of 3× 10³/shot. The interaction of a femtosecond laser pulse with deuterium clusters was experimentally studied. The prepulse and the amplified spontaneous emission (ASE) effects on laser absorption and ion emission were measured with the ASE time width controlled. We also measured the spatial distribution of ions along the plasma channel produced from laser interaction with clusters. We performed an experiment to generate neutrons by using laser-induced nuclear fusion, d(d, n)³He. A 10-TW femtosecond laser beam (280 mJ, 30 fs) was focused onto deuterium gas clusters and produced ions accelerated by Coulomb explosion, which resulted in a neutron yield of 3× 10³/shot.