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Experimental and theoretical analysis of bias ionization by α-particles in a nitrogen laser

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Abstract

Nitrogen laser performance with TE configuration and wedge electrodes is analyzed with background ionization in the laser discharge channel by α particles at a low exposition rate. With the bias ionization, the laser power presents two peaks as a function of gas pressure, with one at the normal low pressure, without bias ionization, and the other at high pressure generated by bias ionization. A simple theoretical model has been developed in a trial to understand this behavior. This model was first tested in later results for a TE configuration nitrogen laser, with flat electrodes, without and with bias ionization. It has been observed that due to the competition between electrode shielding by positively charged α particles and bulk ionization by impact, the laser energy is suppressed with pressure below 50 Torr and enhanced above it.

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Authors and Affiliations

  1. Laboratório de Espectroscopia e Laser, Instituto de Física, Universidade Federal Fluminense, Campus da Boa Viagem, Av. Gen. Milton Tavares de Souza, s/n, Boa Viagem, Niterói, RJ, 24210-340, Brazil

    R. R. Silva, L. A. Vieira Mendes, K. H. Tsui & C. E. Fellows

  2. Departamento de Física, Centro de Ciências Tecnológicas, CCT, Universidade do Estado de Santa Catarina, Campus Universitário Prof. Avelino Marcante, Rua Paulo Malschitzki, s/n, Zona Industrial Norte, Joinville, SC, 89219-710, Brazil

    R. A. De Simone Zanon & A. L. de Oliveira

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  1. R. R. Silva
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  2. L. A. Vieira Mendes
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  3. K. H. Tsui
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  4. R. A. De Simone Zanon
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  5. A. L. de Oliveira
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Correspondence to C. E. Fellows.

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Silva, R.R., Vieira Mendes, L.A., Tsui, K.H. et al. Experimental and theoretical analysis of bias ionization by α-particles in a nitrogen laser. Appl. Phys. B 104, 679–687 (2011). https://doi.org/10.1007/s00340-011-4384-8

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  • DOI: https://doi.org/10.1007/s00340-011-4384-8

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