Development of Multi-species cluster jet and Cryogenically cooled cluster jet

碩士 === 國立中央大學 === 物理研究所 === 95 === With the rapid progress in high-power laser technology in the past decade, the interaction of ultrashort high-intensity laser pulses with atomic clusters has become an active field of research. As a result of their solid-like local density and gas-like average dens...

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Main Authors: Cheng-Yu Lin, 林政宇
Other Authors: Szu-yuan Chen
Format: Others
Language:zh-TW
Published: 2007
Online Access:http://ndltd.ncl.edu.tw/handle/44097500041390530255
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spelling ndltd-TW-095NCU051980062015-10-13T13:59:36Z http://ndltd.ncl.edu.tw/handle/44097500041390530255 Development of Multi-species cluster jet and Cryogenically cooled cluster jet 混合物種與低溫冷凍原子團簇噴流的發展 Cheng-Yu Lin 林政宇 碩士 國立中央大學 物理研究所 95 With the rapid progress in high-power laser technology in the past decade, the interaction of ultrashort high-intensity laser pulses with atomic clusters has become an active field of research. As a result of their solid-like local density and gas-like average density, it has been shown that individual nanometer clusters can absorb laser energy efficiently to form highly-charged hot nanoplasmas, eject KeV electrons and MeV ions, and emit strongly from EUV to hard x-ray. Furthermore, nuclear fusion has also been demonstrated by collisions of high-energy ions produced from laser-heated deuterium clusters. In the past many high field science researches have revealed that many important issues, such as the evolution of refractive index in high harmonic generation and the efficiency of inverse bremstrahlung heating and three body recombination in x-ray laser, are strongly dependent on cluster size. The development of cryogenically cooled cluster jet system and the investigation of cluster formation with buffer gas are used to (1) get deeper insight into the mechanisms of cluster formation, (2) produce larger clusters, and (3) attain cluster formation of hydrogen or deuterium which cannot form clusters under room temperature. Moreover, by measuring the variation of cluster size with the distance perpendicular to nozzle exit we can investigate the evolution of cluster formation. With these methods we can establish the parameters more extensively and precisely for controlling cluster size, and these provide a preliminary study for utilizing cluster as medium in high field science research. Szu-yuan Chen 陳賜原 2007 學位論文 ; thesis 49 zh-TW
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description 碩士 === 國立中央大學 === 物理研究所 === 95 === With the rapid progress in high-power laser technology in the past decade, the interaction of ultrashort high-intensity laser pulses with atomic clusters has become an active field of research. As a result of their solid-like local density and gas-like average density, it has been shown that individual nanometer clusters can absorb laser energy efficiently to form highly-charged hot nanoplasmas, eject KeV electrons and MeV ions, and emit strongly from EUV to hard x-ray. Furthermore, nuclear fusion has also been demonstrated by collisions of high-energy ions produced from laser-heated deuterium clusters. In the past many high field science researches have revealed that many important issues, such as the evolution of refractive index in high harmonic generation and the efficiency of inverse bremstrahlung heating and three body recombination in x-ray laser, are strongly dependent on cluster size. The development of cryogenically cooled cluster jet system and the investigation of cluster formation with buffer gas are used to (1) get deeper insight into the mechanisms of cluster formation, (2) produce larger clusters, and (3) attain cluster formation of hydrogen or deuterium which cannot form clusters under room temperature. Moreover, by measuring the variation of cluster size with the distance perpendicular to nozzle exit we can investigate the evolution of cluster formation. With these methods we can establish the parameters more extensively and precisely for controlling cluster size, and these provide a preliminary study for utilizing cluster as medium in high field science research.
author2 Szu-yuan Chen
author_facet Szu-yuan Chen
Cheng-Yu Lin
林政宇
author Cheng-Yu Lin
林政宇
spellingShingle Cheng-Yu Lin
林政宇
Development of Multi-species cluster jet and Cryogenically cooled cluster jet
author_sort Cheng-Yu Lin
title Development of Multi-species cluster jet and Cryogenically cooled cluster jet
title_short Development of Multi-species cluster jet and Cryogenically cooled cluster jet
title_full Development of Multi-species cluster jet and Cryogenically cooled cluster jet
title_fullStr Development of Multi-species cluster jet and Cryogenically cooled cluster jet
title_full_unstemmed Development of Multi-species cluster jet and Cryogenically cooled cluster jet
title_sort development of multi-species cluster jet and cryogenically cooled cluster jet
publishDate 2007
url http://ndltd.ncl.edu.tw/handle/44097500041390530255
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