Title page for 962202030


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Student Number 962202030
Author Pu Wang(王璞)
Author's Email Address No Public.
Statistics This thesis had been viewed 612 times. Download 379 times.
Department Physics
Year 2009
Semester 2
Degree Master
Type of Document Master's Thesis
Language zh-TW.Big5 Chinese
Title Preliminary Experiment for the Control of Cluster Vibration
Date of Defense 2010-07-08
Page Count 35
Keyword
  • cluster
  • cluster vibration
  • x-ray
  • Abstract Atomic cluster is a unique combination of gas and solid phase components. It is normally produced inside a high-pressure gas jet that the atoms are combined through van der Waal’s force. Their solid-like local density and gas-like average density cause individual nanometer clusters efficiently to absorb laser energy, forming highly-charged hot nanoplasmas; to eject keV electrons and MeV ions, and to emit strongly from extreme-ultraviolet to x-ray. It is also demonstrated that cluster jet can be served as the gain medium of the inner-shell hard x-ray laser.
    In the past studies of the high-harmonic generation from laser irradiated clusters, it has been proved that laser induced cluster vibration will effect the efficiency of high-harmonic generation. In order to understand and control laser-cluster interaction, we develop an experimental station for pump-probe experiment with IR and x-ray pulses. We use an infrared laser pulse (λ= 810 nm) to induce cluster vibration. After a time delay , we use a soft x-ray pulse (λ= 32.8 nm) to probe the vibration. The absorption of x-ray pulses is measured. We want to find the relationship between cluster vibration and x-ray absorption by observe the variation of x-ray absorption with time delay. As a result of that cluster vibration affects the distance between atoms, understand and control of the vibration may lead us to achieve the efficient inner-shell x-ray lasing from laser irradiated clusters.
    Table of Content 第一章 緒論 1
    1‐1 研究目的 1
    1-2 歷史背景 1
    1-2-1 氬原子團簇的震盪週期 1
    1-2-2 氬原子團簇震盪對產生高階諧波的效率影響 3
    1-2-3 氬原子團簇對高強度X 光脈衝之異常吸收 4
    1-2-4 氬原子團簇造成之X 光雷射小角度散射 5
    第二章 實驗架設 7
    2-1 實驗系統全示意圖 7
    2-2 雷射系統簡介 7
    2-2-1 10 兆瓦雷射系統 7
    2-1-2 X 光雷射脈衝系統 8
    2-1-3 X 光雷射的偏振方向 11
    2-2 實驗架設與參數 13
    2-3 實驗前的相關測試 17
    2-3-1 X 光脈衝能量監控 17
    2-3-2 Imaging MCP 所量測到的X 光脈衝訊號 19
    2-3-3 X 光脈衝能量監測器與imaging MCP 訊號比較 20
    2-3-4 入射X 光脈衝能量變化對穿透率的影響 22
    第三章 實驗結果與討論 24
    3-1 掃預脈衝與X 光脈衝間時間延遲之實驗結果 24
    3-2 氬原子團簇被預脈衝游離之證據 25
    第四章 總結 27
    參考文獻 28
    Reference [1]T. Ditmire et al., “High intensity laser absorption by gases of atomic clusters,” Phys. Rev. Lett. 78, 3121–3124 (1997).
    [2] Y. L. Shao, T. Ditmire, et al., “Multi-keV Electron Generation in the Interaction
    of Intense Laser Pulses with Xe Clusters,” Phys. Rev. Lett.77, 3343–3346 (1996).
    [3] T. Ditmire et al., “High-energy ions produced in explosions of superheated
    atomic clusters,” Nature 386, 54–56(1997).
    [4]M.-C. Chou, P.-H. Lin, et al.,” Experimental investigation of the parameter space for optical-field-ionization cluster-jet x-ray lasers” Phys. Rev. A, 74, 023804 (2006).
    [5]A. B. Borisov et al., “Ultrabright multikilovolt coherent tunable x-ray source at λ∼ 2.71–2.93 Å,” J. Phys. B: At. Mol. Opt. Phys. 36, 3433-3455 (2003).
    [6]Yen-Mu Chen et al., ‘‘Enhancement of high-harmonic generation by laser-
    induced cluster vibration and its application to diagnosis of clusters’’ Optics Letters 32, 2714 (2007)
    [7]Y. Ozaki et al., “Analyses of breathing vibration of nearly spherical Ar clusters based on a dense sphere model,” Chem. Phys. Lett. 182, 571 (1991)
    [8]A.R.B. de Castro et al,” Spectroscopy of rare gas clusters using VUV light from
    a free-electron-laser” JESRP 156-158, 25-29 (2007).
    [9]H.-H. Chu et al., “A versatile 10-TW laser system with robust passive controls to
    achieve high stability and spatiotemporal quality, ””Appl. Phy. B 79,193-201
    (2004).
    [10] M.-C. Chou et al., “Dramatic enhancement of optical-field-ionization collisional-excitation x-ray lasing by using an optically preformed plasma waveguide ” Phy. Rev. Lett. 99, 063904 (2007).
    [11]P.-H. Lin et al., “Optical-field-ionization collisional-excitation x-ray lasers with optically preformed plasma waveguide ” Phy. Rev. A 76, 053817 (2007).
    [12]M. C. Chou, Doctor Thesis (2007).
    [13]Z. X. Yang, Master Thesis (2005).
    [14]Ste´phane Sebban et al,” Investigations of collisionally pumped optical field ionization soft-x-ray lasers” J. Opt. Soc. Am. B 20, 195(2003)
    [15]S. Augst et al,”Tunneling Ionization of Noble Gases in a High-Intensity Laser Field” Phy. Rev. Lett. 63, 2212 (1989).
    Advisor
  • Hsu-Hsin Chu(朱旭新)
  • Files
  • 962202030.pdf
  • approve immediately
    Date of Submission 2010-07-28

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