Effective molecular targets for a laser plasma XUV radiation source

Gagik Ts. Nersisyan; Valeri O. Papanyan

doi:10.1117/12.375165

11 January 2000 Effective molecular targets for a laser plasma XUV radiation source

Gagik Ts. Nersisyan, Valeri O. Papanyan

Proceedings Volume 3886, High-Power Lasers in Energy Engineering; (2000) https://doi.org/10.1117/12.375165
Event: Advanced High-Power Lasers and Applications, 1999, Osaka, Japan

Abstract

Metal targets covered by micrometer layers of metal- phthalocyanines or fullerenes are studied here. An increase in XUV yield due to the optimized absorption of the laser field is reported. Effects of high-temperature plasma rapid expansion were observed. Moderate power nanosecond and picosecond neodymium lasers are used to produce an incident intensity of 10¹¹ to 10¹³ W/cm² on the targets. The plasma electron density was measured by fitting observed spectral profiles to the theoretical profiles. Collisional, Doppler, and Stark broadening mechanisms were considered in the calculations. Our measurement technique permits us to determine the electron density and temperature dependence on distances from the target surface from 1 mm up to approximately 5 mm. Electron temperature was measured by comparing intensities of spectral lines, belonging to the ions having a different degree of ionization. Preliminary experiments show that conversion efficiency for molecular coated targets is greater by a factor of approximately 1.5 than measured form bulk solid metal targets.

Citation Download Citation

Gagik Ts. Nersisyan and Valeri O. Papanyan "Effective molecular targets for a laser plasma XUV radiation source", Proc. SPIE 3886, High-Power Lasers in Energy Engineering, (11 January 2000); https://doi.org/10.1117/12.375165

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