Excitation mechanisms in 1 mJ picosecond laser induced low pressure He plasma and the resulting spectral quality enhancement | Zendy

Nasrullah Idris | Zendy; Kurnia Lahna | Zendy; Syahrun Nur Abdulmadjid | Zendy; Muliadi Ramli | Zendy; Hery Suyanto | Zendy; Alion Mangasi Marpaung | Zendy; Marincan Pardede | Zendy; Eric Jobiliong | Zendy; Rinda Hedwig | Zendy; Maria Margaretha Suliyanti | Zendy; Zener Sukra Lie | Zendy; Tjung Jie Lie | Zendy; Kiichiro Kagawa | Zendy; May On Tjia | Zendy; Koo Hendrik Kurniawan | Zendy

Open Access

Excitation mechanisms in 1 mJ picosecond laser induced low pressure He plasma and the resulting spectral quality enhancement

Author(s) -

Nasrullah Idris,

Kurnia Lahna,

Syahrun Nur Abdulmadjid,

Muliadi Ramli,

Hery Suyanto,

Alion Mangasi Marpaung,

Marincan Pardede,

Eric Jobiliong,

Rinda Hedwig,

Maria Margaretha Suliyanti,

Zener Sukra Lie,

Tjung Jie Lie,

Kiichiro Kagawa,

May On Tjia,

Koo Hendrik Kurniawan

Publication year - 2015

Publication title -

journal of applied physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.699

H-Index - 319

eISSN - 1089-7550

pISSN - 0021-8979

DOI - 10.1063/1.4922456

Subject(s) - picosecond , laser , plasma , excitation , atomic physics , nanosecond , spectroscopy , emission spectrum , excited state , materials science , chemistry , optics , spectral line , physics , quantum mechanics , astronomy

We report in this paper the results of an experimental study on the spectral and dynamical characteristics of plasma emission induced by 1 mJ picoseconds (ps) Nd-YAG laser using spatially resolved imaging and time resolved measurement of the emission intensities of copper sample. This study has provided the experimental evidence concerning the dynamical characteristics of the excitation mechanisms in various stages of the plasma formation, which largely consolidate the basic scenarios of excitation processes commonly accepted so far. However, it is also clearly shown that the duration of the shock wave excitation process induced by ps laser pulses is much shorter than those observed in laser induced breakdown spectroscopy employing nanosecond laser at higher output energy. This allows the detection of atomic emission due exclusively to He assisted excitation in low pressure He plasma by proper gating of the detection time. Furthermore, the triplet excited state associated with He I 587.6 nm is shown to be...

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