Electron temperature distribution measurement in Z pinch by the laser radiation absorption method

The paper proposes a new method for measuring the temperature of internal region of Z-pinch; the method is based on laser probing of plasma and simultaneous measurements of absorption profiles and interferential run-on of probing radiation phase inside Z-pinch. It is shown that opaque pinch region which occurs laser probing experiments is related to the absorption of radiation. It is shown that laser radiation which has passed through Z-pinch features sufficiently high degree of coherence which enables interferometry of absorption region. The values of electron density and electron temperature were recovered in the experiments with Z-pinches (produced after an explosion of 20 μm aluminium wire by 50 ns pulse of current of about 250 kA for necking the pinch of ∼ 1.4 x 1020 cm-3 and ∼ 530 eV, respectively. 11 refs., 4 figs