Analyses of the plasma generated by laser irradiation on sputtered target for determination of the thickness used for plasma generationa

In Brookhaven National Laboratory, laser ion source has been developed to provide heavy ion beams by using plasma generation with 1064 nm Nd:YAG laser irradiation onto solid targets. The laser energy is transferred to the target material and creates a crater on the surface. However, only the partial...

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Bibliographic Details
Published in:Review of scientific instruments 2014-02, Vol.85 (2)
Main Authors: Cinquegrani, David, Kanesue Takeshi, Okamura Masahiro, Washio Masakazu
Format: Article
Language:English
Subjects:
Carbon
Heavy ions
Ion beams
Ion sources
Ions
Irradiation
Laser beams
Lasers
Neodymium lasers
Plasma
Scientific apparatus & instruments
Semiconductor lasers
YAG lasers
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Summary:In Brookhaven National Laboratory, laser ion source has been developed to provide heavy ion beams by using plasma generation with 1064 nm Nd:YAG laser irradiation onto solid targets. The laser energy is transferred to the target material and creates a crater on the surface. However, only the partial material can be turned into plasma state and the other portion is considered to be just vaporized. Since heat propagation in the target material requires more than typical laser irradiation period, which is typically several ns, only the certain depth of the layers may contribute to form the plasma. As a result, the depth is more than 500 nm because the base material Al ions were detected. On the other hand, the result of comparing each carbon thickness case suggests that the surface carbon layer is not contributed to generate plasma.
ISSN:0034-6748
1089-7623
DOI:10.1063/1.4862660