Laser-generated Cu plasma in vacuum and in nitrogen gas

0525527 - ÚJF 2021 RIV GB eng J - Journal Article
Torrisi, L. - Cutroneo, Mariapompea - Torrisi, Alfio
Laser-generated Cu plasma in vacuum and in nitrogen gas.
Vacuum. Roč. 178, č. 8 (2020), č. článku 109422. ISSN 0042-207X. E-ISSN 1879-2715
R&D Projects: GA MŠMT EF16_013/0001812; GA MŠMT LM2015056
Institutional support: RVO:61389005
Keywords : Cu plasma * laser-generated plasma * Nitrogen gas environment * SiC * TOF
OECD category: Materials engineering
Impact factor: 3.627, year: 2020
Method of publishing: Limited access
https://doi.org/10.1016/j.vacuum.2020.109422

A pulsed ns IR laser at about 10(10) W/cm(2) intensity is employed to irradiate a Cu target placed in a vacuum and in nitrogen gas. The produced plasma is characterized in terms of emitted ions and photons as a function of the nitrogen pressure in the chamber. The mechanisms of ion gas interactions are investigated in terms of Cu ion energy loss and X-ray attenuation using an ion collector and a SiC detector. A fast CCD camera in the visible region has produced the collision images of the ions with the nitrogen molecules. A plasma temperature of about 44 eV, an emission of soft X-rays up to about 100 eV, an ablation yield of about 2.4 x 10(15) atoms/pulse, a maximum Cu ion acceleration of 1.4 keV and a maximum ionization up to Cu9+ were measured in high vacuum.
Permanent Link: http://hdl.handle.net/11104/0309640