Diagnosis of electromagnetic properties and light flash characteristics created by hypervelocity impact\m{1}

Abstract

In order to diagnose electromagnetic properties and light flash characteristics generated by hypervelocity impact, the diagnostic systems of sweep Langmuir probe(SLP) and triple Langmuir probe (TLP) for electron temperature and electron density in plasma were established, properties of magnetic field were obtained by using coil measurement system established, and characteristics of light flash were also acquired through optical pyrometer measurement system during the whole physical process in hypervelocity impact, Experimental results showed that the average electron temperature of the triple Langmuir probe was near 0.75 eV on the whole physical process, the average electron density in the experiment was about. However, the electron temperature and electron density of plasma acquired by using t he sweep Langmuir probe were lower than the values by using triple Langmuir probe. The peak value of magnetic induction intensity induced by plasma was 9.8 × 10/cm during the hypervelocity impacts, and light flash intensity peak value was 40–50 mW.cm−2.nm−1 in the experimental conditions in the paper.