A simple method for laser-induced plasma diagnostics under condition of optically thin

For simple plasma diagnostics for laser-induced plasma (LIP) under the condition of optically thin, taking the Cu I spectral lines produced by the laser-induced copper plasma, we investigate a simple method for temperature and electron density diagnostics, and we obtain the plasma temperature which has 104 K order of magnitude and the averaged electron density is 3.8 × 1018cm−3, which are in agreement with that obtained by other methods. This investigation will be significant for spectral diagnostics for LIP.