التحقيق في خصائص إنتاج البلازما لموجهات التفريغ الشعرية
Wiggins, . S. M
MetadataShow full item record
This paper investigates the testing of plasma waveguides that are suitable for the guiding of high power femtosecond laser pulses in non-linear laser-plasma interaction experiments. Plasma is created by ionising the gas injected into the capillary using a high voltage pulse. Two waveguides were used: each is 4 cm in length but with a different capillary diameter profile. The first waveguide was a linear (straight) waveguide with a constant diameter of 288 μm and the second featured a taper in its diameter from 289 – 232 μm. To characterise the performance of each capillary, high voltage testing was undertaken using a vacuum chamber. The straight capillary produced a steady current of 320 A with a voltage input of 17kV. The tapered capillary was tested with the current flowing from the large end to the small end to produce a reasonably stable current of 300 A with an input voltage of 16 kV. In both straight and tapered capillaries, the temporal fluctuations of the current pulse demonstrates excellent stability of the plasma current.