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Diagnosis of carbon laser produced plasma by using an electrostatic energy analyzer

C. URSU1, P.-E. NICA2,*

Affiliation

  1. “Petru Poni” Institute of Macromolecular Chemistry, 41A Gr. Ghica Voda Alley, 700487 Iasi, Romania
  2. “Gheorghe Asachi” Technical University of Iasi, Blvd. Mangeron no.64, 700029 Iasi, Romania

Abstract

Using an electrostatic energy analyzer in both, time-of-flight (TOF) and retarding field analyzer (RFA) modes, respectively, some laser produced plasma parameters are derived from monitoring the positive particles. In TOF mode, the plasma temperature and centre of mass velocity evolutions as a function of laser fluence have been derived. In RFA mode, a charge separation phenomenon was evidenced. TOF spectra recorded for different applied retarding voltage present two separated peaks whose corresponding time values increase with the applied voltage. Moreover, a reheating effect of the plasma was evidenced as a consequence of reflected ions..

Keywords

Laser ablation, Electrostatic energy analyzer, Energy distribution.

Submitted at: Sept. 25, 2012
Accepted at: Feb. 20, 2013

Citation

C. URSU, P.-E. NICA, Diagnosis of carbon laser produced plasma by using an electrostatic energy analyzer, Journal of Optoelectronics and Advanced Materials Vol. 15, Iss. 1-2, pp. 42-45 (2013)