研究目的
Investigating the generation of a monochromatic soft x-ray from femtosecond laser-produced plasma with aluminum.
研究成果
A tabletop ultrafast soft x-ray source was successfully generated using a femtosecond laser and aluminum target. The study provided detailed parameters of the x-ray beam and demonstrated the potential of laser-induced x-ray sources as an efficient alternative to large facility accelerators for time-resolved experiments.
研究不足
The study is limited by the energy resolution of the detector and the mechanical fluctuation of the aluminum tape target. The conversion energy efficiency from the laser to Al Kα is relatively low.
1：Experimental Design and Method Selection:
A Ti:Sapphire laser was used to generate x-ray radiation by ablating an aluminum target. The setup included a gold coated off-axis parabolic mirror for focusing the laser beam.
2：Sample Selection and Data Sources:
An aluminum alloy tape was used as the target material. The x-ray radiation was analyzed using a Si-PIN diode x-ray detector and a soft x-ray CCD.
3：List of Experimental Equipment and Materials:
Equipment included a Ti:Sapphire laser, gold coated off-axis parabolic mirror, aluminum tape target, Si-PIN diode x-ray detector, soft x-ray CCD, tungsten/silicon multilayer, flat quartz, and bent thallium acid phthalate (TLAP) crystals.
4：Experimental Procedures and Operational Workflow:
The laser was focused onto the aluminum tape target to generate x-ray radiation. The x-ray radiation was then monochromatized using different crystals and analyzed.
5：Data Analysis Methods:
The energy distribution of the x-ray radiation was analyzed using the Si-PIN diode x-ray detector and soft x-ray CCD. The size of the x-ray source beam was estimated using the FWHM of the intensity profile near the focal point.
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Ti:Sapphire laser
Legend
COHERENT
Generating x-ray radiation by ablating the target material
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gold coated off-axis parabolic mirror
OAPM
Focusing the laser beam
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Si-PIN diode x-ray detector
XR-100CR & PX5
AMPTEK Co.
Analyzing the high energy radiation
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soft x-ray CCD
PIXIS-1024B
Princeton Instruments
Detecting Al Kα line
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flat W/Si multilayer
Monochromatization of soft x-ray
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flat quartz
1010
Monochromatization of soft x-ray
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bent thallium acid phthalate (TLAP) crystal
Monochromatization of soft x-ray
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