We report an attempt to detect the electron-positron annihilation line from the radio galaxy 3C 120, in which the jet interacts strongly with interstellar clouds. Such interactions should cause most of the jet plasma tomix with the gas in the clouds. This will thermalize the majority of any positrons in the jet, leading to continuous annihilation with ambient electrons. We derive the number den...

A novel approach combining experimental and numerical methods for the study of reaction mechanisms in a cold atmospheric Ar plasma jet is introduced. The jet is operated with a shielding gas device that produces a gas curtain of defined composition around the plasma plume. The shielding gas composition is varied from pure N2 to pure O2. The density of metastable argon ( ) Ar 4s, P 3 2 in the pl...

A novel approach combining experimental and numerical methods for the study of reaction mechanisms in a cold atmospheric Ar plasma jet is introduced. The jet is operated with a shielding gas device that produces a gas curtain of defined composition around the plasma plume. The shielding gas composition is varied from pure N2 to pure O2. The density of metastable argon ( ) Ar 4s, P 3 2 in the pl...

A bstract We study evolution equations describing jet propagation through quark-gluon plasma (QGP). In particular we investigate the contribution of momentum transfer during branching and find that such a is sizeable. Furthermore, various approximations, as Gaussian approximation diffusive to jet-broadening term. notice in order reproduce BDIM equation (without branching) requires very large va...

The microwave plasma jet has the advantage of high density and abundant active particles but fails to produce large-scale plasmas in ambient air which hinders application ignition combustion. We have applied a surface wave resonator (including Zn-coated iron wire trigger) Ar/Zn pulsed jet. discharge experiment shows that generally presents three modes, namely, filamentous argon (P < 120 ...

In preparation for ITER, JET has been upgraded with a new ITER-like wall (ILW), whereby the main plasma facing components, previously of carbon, have been replaced by mainly Be in the main chamber and W in the divertor. As part of the many diagnostic enhancements, a new, survey, visible spectroscopy diagnostic has been installed for the characteri...

Under the condition of specific pulsed discharge parameters, mode conversion low-temperature plasma jet channel that originally propagates along a straight line will occur, forming three-dimensional helical channel. Unlike traditional wave discharge, there are no factors such as an external constant magnetic field destroys poloidal symmetry dielectric tube, and chiral direction streamer change ...