Spectroscopic analysis of temperature and density of Sn plasma produced by a CO{sub 2} laser

Journal Article · Fri Oct 15 00:00:00 EDT 2010 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3475369· OSTI ID:21476551

Shaikh, Nek M ^[1]; Tao, Y; Burdt, R A; Yuspeh, S; Tillack, M S ^[1]; Amin, N ^[1]

---

1. Center for Energy Research, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0417 (United States)

The temporal and spatial evolution of electron temperature and electron density from Sn plasma produced by a CO{sub 2} laser has been investigated in vacuum using spectroscopic methods. The plasma parameters were inferred by the Boltzmann plot method from experimentally observed line profiles of singly ionized Sn and Stark broadened profiles. At a laser intensity of 10{sup 10} W/cm{sup 2}, electron temperature and density were measured to be within 1.13 eV to 0.53 eV and 5.3x10{sup 16} cm{sup -3} to 1.4x10{sup 16} cm{sup -3}, respectively, for delay times between 200 ns and 1100 ns, and at distances up to 5 mm along the target normal. The results show the electron temperature and density from Sn plasma produced by a CO{sub 2} laser with wavelength of 10.6 {mu}m to be lower than previously reported results using a 1064 nm laser in a similar parameter regime. The lower temperature in the region far away from the target surface confirms the smaller interaction region for CO{sub 2} laser as compared with that of neodymium-doped yttrium aluminum garnet laser.

• OSTI ID: 21476551
• Journal Information: Journal of Applied Physics, Vol. 108, Issue 8; Other Information: DOI: 10.1063/1.3475369; (c) 2010 American Institute of Physics; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ALUMINIUM
CARBON DIOXIDE LASERS
DOPED MATERIALS
ELECTRON DENSITY
ELECTRON TEMPERATURE
EMISSION SPECTROSCOPY
EV RANGE
ION TEMPERATURE
LASER RADIATION
LASER-PRODUCED PLASMA
LINE BROADENING
NEODYMIUM LASERS
PLASMA DENSITY
PLASMA DIAGNOSTICS
PLASMA PRODUCTION
STARK EFFECT
TIN
ELECTROMAGNETIC RADIATION
ELEMENTS
ENERGY RANGE
GAS LASERS
LASERS
MATERIALS
METALS
PLASMA
RADIATIONS
SOLID STATE LASERS
SPECTROSCOPY