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激光产生的等离子体动力学及对聚变装置第一壁材料诊断研究

Abstract第5-6页
摘要第7-19页
TABLE OF SYMBOLS第19-20页
LIST OF ABREVIATIONS第20-21页
1 Introduction第21-31页
    1.1 Effects of Physical Parameters on LA第21-25页
        1.1.1 Laser Parameters第22-23页
        1.1.2 Ambient Background Effects第23-25页
    1.2 Some Prominent Applications of LA第25-29页
        1.2.1 Laser Induced Breakdown Spectroscopy(LIBS)第25-27页
        1.2.2 Ion Emission From Laser-produced Plasma第27-28页
        1.2.3 Nanoparticles Generation第28-29页
    1.3 Lasers for Simulating the Effect of Transient Energy Load on PFMs第29-30页
    1.4 Motivation第30页
    1.5 Organization of Dissertation第30-31页
2 Experimental Details第31-36页
    2.1 Experimental Setup for Time Integrated LIBS Studies第31-33页
        2.1.1 Sample Preparation第31-32页
        2.1.2 Lasers第32页
        2.1.3 Vacuum Chamber第32页
        2.1.4 LIBS System第32-33页
        2.1.5 SEM and Profilometer第33页
    2.2 Experimental Setup for Plasma Imaging and Time-resolved Studies第33-36页
        2.2.1 Nanosecond Laser第33页
        2.2.2 Femtosecond Laser第33页
        2.2.3 Chamber第33-34页
        2.2.4 ICCD for Fast-gated Plasma Imaging第34页
        2.2.5 Spectrometers for Optical Emission Spectroscopy第34页
        2.2.6 Ion Collector第34-35页
        2.2.7 Scanning Electron Microscope(SEM) and Profilometer第35-36页
3 LIBS With Different Laser Wavelengths at Reduced Pressures第36-55页
    3.1 Background第36-37页
    3.2 Analysis第37-40页
        3.2.1 Electron Density第37-39页
        3.2.2 Electron Temperature第39页
        3.2.3 Local Thermodynamical Equilibrium(LTE)第39-40页
    3.3 LIBS of W With Various Wavelengths of Nd:YAG Laser第40-46页
        3.3.1 Emission Intensity第40-41页
        3.3.2 Effect of Irradiance on Plasma Parameters第41-42页
        3.3.3 Laser Wavelength Dependence Material Reflectivity第42-43页
        3.3.4 Mass Ablation Rate第43-44页
        3.3.5 Laser Plasma Absorption第44-45页
        3.3.6 Temporal Evaluation第45-46页
    3.4 Ambient Gases Effects on Plasma Parameters and Ablated Mo Surface第46-49页
        3.4.1 Emission Intensity第46-47页
        3.4.2 Effect of Background Gasses on Electron Density第47-48页
        3.4.3 Temperature Variation第48-49页
    3.5 Discussion第49-54页
        3.5.1 Development of Cascade Like Growth of Density第50-51页
        3.5.2 Surface Morphology第51-52页
        3.5.3 Profillometery第52-54页
    3.6 Summary第54-55页
4 Dynamics of Nanosecond and Femtosecond Laser-produced Plasma第55-83页
    4.1 Introduction第55页
    4.2 Dynamics of Nanosecond Laser Produced Plasma第55-68页
        4.2.1 Time-resolved Emission in Vacuum and at Atmospheric Pressure第55-56页
        4.2.2 Line Intensity and Line Broadening with Background Pressure第56-58页
        4.2.3 SNR and SBR第58-59页
        4.2.4 Influence of Pressure on T_e and N_e第59-60页
        4.2.5 Plasma Shielding第60-61页
        4.2.6 Pressure Effects on the Morphology of Crater第61-62页
        4.2.7 Hydrodynamic Expansion of Ns Plume vs Pressure第62-64页
        4.2.8 Shock Wave & Drag Models第64-65页
        4.2.9 Ions Kinetic Energy第65-66页
        4.2.10 Plume Length & Adiabatic Expansion Model第66-68页
    4.3 Dynamics of Femtosecond Laser-Produced Plasma第68-74页
        4.3.1 Experimental Details第68页
        4.3.2 Hydrodynamics of Expanding Plasma第68-71页
        4.3.4 Time-resolved Optical Emission第71-72页
        4.3.5 S/B and S/N Ratios第72-73页
        4.3.6 Effects of Plasma Parameters on S/B and S/N Ratios第73-74页
    4.4 Comparison of fs and ns LA plumes第74-81页
        4.4.1 Background Gas Collisional and Confinement Effects第74-76页
        4.4.2 Emission Features第76-78页
        4.4.3 Optimum of S/B Ratios for Ns and Fs第78-79页
        4.4.4 Plasma Parameters第79-80页
        4.4.5 Comparison of Surface Morphology第80-81页
    4.5 Summary第81-83页
5 Kinetics of Particles Emission from LPP第83-109页
    5.1 Kinetics of Ions Emission from Nanosecond LPP第83-95页
        5.1.1 Elemental Dependent Ion Profile第83-84页
        5.1.2 Variation in Ion Flux with Atomic Weight & Sublimation Energy第84-85页
        5.1.3 Velocity & KE第85页
        5.1.4 Fast & Slow Ions Emission for High-Z Elements第85-86页
        5.1.5 Variation in Flux and K.E With Power Density第86-88页
        5.1.6 Angle Resolved Flux of Fast & Slow Ions第88-89页
        5.1.7 Fast Photography of Emission第89-90页
        5.1.8 Optical Emission Time of Flight Spectroscopy第90-91页
        5.1.9 Observation of Ionization of Background Gas at Early time第91-92页
        5.1.10 Prompt Electron Emission From Low & High-Z Element第92-94页
        5.1.11 Summary第94-95页
    5.2 Nanoparticles Generation in Femtosecond LPP第95-109页
        5.2.1 Experimental Detail第95-96页
        5.2.2 Nanoparticles Imaging第96-98页
        5.2.3 Black Body Emission From Nanoparticles第98-100页
        5.2.4 Nanoparticles Temperature第100-102页
        5.2.5 OTOF Profiles of W+~第102页
        5.2.6 Comparison of W With Low-Z Elements第102-107页
        5.2.7 Summary第107-109页
6 Investigation of W Under ELM's Like Energy Load Using Lasers第109-118页
    6.1 Introduction第109页
    6.2 Experimental Detail第109-110页
    6.3 Particles Emission第110-113页
        6.3.1 Time Integration Particles Emission第110-111页
        6.3.2 Time Resolved Particles Emission第111-112页
        6.3.3 Temperature of Particles第112-113页
    6.4 Morphology of Degraded Surface第113-117页
        6.4.1 Ductile-to-brittle Transition & Cracks Formation第115-116页
        6.4.2 Small Particles & Fine Grains第116-117页
    6.5 Summary第117-118页
7 Conclusion & Outlook第118-121页
8 Abstract of Innovation Points第121-122页
9 创新点摘要第122-123页
References第123-140页
Published Academic Papers During PhD Period第140-142页
Acknowledgement第142-143页
About the Author第143-145页

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