The weld penetration under different plasma welding currents was compared in the plasma-gas metal arc (GMAW) hybrid of aluminum alloy. When current lower than 150 A, greater sum single and GMAW penetration. reached 130 with increase current, advantage gradually weakened, that welding. above change mechanism is revealed from heat source energy distribution molten pool stress. results show when 1...

background: there are varieties of purification techniques for separation of human plasma proteins such as salting out, ion exchange chromatography, and ethanol fractionation. there are limitations for each method, for example in salting out method, the salt has to be removed in an additional step. ion exchange chromatography is difficult for scaling up, and plasma fractionation is a time consu...

U-shaped inductively coupled plasma (ICP) source was investigated as a linear plasma source for the next generation roll-to-toll flexible display processing. For the radio frequency power to the source, the dual frequency composed of 13.56 MHz and 2 MHz was used and the effect of dual frequency to the U-shaped ICP source on the plasma density, electron temperature, and plasma uniformity was inv...

An underdense plasma-lens experiment is planned at the UCLA Neptune Laboratory. For this experiment, a LaB6based discharge plasma source was developed and tested. Test results of the plasma source show that it can provide satisfactory argon plasma parameters for underdense plasma lens experiments, i.e., a density in low 10 cm 3 range and a thickness of a few cm. In the plasma chamber a YAG slab...

Magnetic flux tubes or flux ropes in plasmas are important in nature and the laboratory. Axial boundary conditions strongly affect flux rope behavior, but this has never been systematically investigated. We experimentally demonstrate for the first time axial boundary conditions that are continuously varied between ideal magnetohydrodynamic (MHD) line-tied (fixed) and non-line-tied (free). In co...

We discuss some phenomenological aspects of γ-ray emitting jets. In particular, we present calculations of the γ-sphere and π-sphere for various target photon fields and employ them to demonstrate how γ-ray observations at very high energies can be used to constraint the Doppler factor of the emitting plasma and the production of VHE neutrinos. We also consider some implications of the rapid Te...

Plasma characterization and impedance matching are an integral part of any radio frequency (RF) based plasma source. In long pulse operation, particularly in high power operation where plasma load may vary due to different reasons (e.g. pressure and power), online tuning of impedance matching circuit and remote plasma density estimation are very useful. In some cases, due to remote interfaces, ...