| Summary: | Low temperature plasma production is possible as a result of photoionization using high-intensity EUV (Extreme UltraViolet) and SXR (Soft X-Ray) pulses. Plasma of this type is also present in outer space, e.g. aurora borealis, it also occurs when high velocity objects enter the atmosphere, where high temperatures can be produced locally by friction. The low temperature plasma is also formed in an ambient gas surrounding the hot laser produced plasma (LPP). In this work a special system has been prepared for investigation of this type of plasma. The LPP was created inside a chamber filled with a gas under a low pressure, of the order of 1 – 50 mbar, by the laser pulse [3-9 J], [1-8 ns] focused onto a gas puff target. In such a case, the SXR/EUV radiation emitted from the LPP was partially absorbed in the low density gas. In this case high and low temperature plasmas (T e ~ 100eV, T e ~ 1eV respectively) were created locally in the chamber. Investigation of the EUV induced plasmas were performed mainly using spectral methods in UV/VIS light. The measurements were performed using an echelle spectrometer and additionally spatial-temporal measurements were performed employing an optical streak camera. Spectral analysis was supported by the PGOPHER numerical code.
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