Voltage–current characteristics of free burning arcs in SF6 and air have been known for decades. As the demand an SF6-free solution is increasing, there accompanying need to determine arc parameters alternative gases. An unblown experiment has established voltage–current gases, which not yet thoroughly studied. In this experiment, measurements were performed a number gases under consideration a...

The carbon nanomaterails having the brittle star-like morphology (bs-CNMs) could be synthesized using C2H2-SF6 gases under thermal chemical vapour deposition (TCVD) system. The micro-sized Ni grains were used as the catalyst for bs-CNMs on the Al2O3 substrate. The bs-CNMs could be obtained under the condition of the source gases flow rates at 100sccm for C2H2 and 50sccm for SF6. The bs-CNMs wer...

In the self-breakdown experiment, it is demonstrated that breakdown stability of 15% SF6/N2 was higher than pure SF6 and N2 in non-uniform field under negative impulse voltages. this paper, stable phenomenon gas mixture studied at nanosecond scale. The corona process streamer these three gases are investigated by using a high-speed framing camera. stabilized abnormal phenomena observed discharg...

Cryogenic buffer gas beams are central to many cold molecule experiments. Here, we use absorption and fluorescence spectroscopy directly compare molecular of AlF, CaF, MgF YbF molecules, produced by chemical reaction laser ablated atoms with fluorine rich reagents. The beam brightness for AlF is measured as 2×1012 molecules per steradian pulse in a single rotational state, comparable an Al atom...

Abstract: In this paper, a DRIE process for fabricating MEMS silicon trenches with a depth of more than 250 m is described. The DRIE was produced in oxygen-added sulfur hexafluoride (SF6) plasma, with sample cooling to cryogenic temperature using a Plasmalab System 100 ICP 180 at different RF powers. A series of experiments were performed to determine the etch rate and selectivity of the some m...

CUS-3 is a short-tailed, dsDNA bacteriophage that infects serotype K1 Escherichia coli. We report icosahedrally averaged and asymmetric, three-dimensional, cryo-electron microscopic reconstructions of the CUS-3 virion. Its coat protein structure adopts the "HK97-fold" shared by other tailed phages and is quite similar to that in phages P22 and Sf6 despite only weak amino acid sequence similarit...

In this experimental study, a column of heavy gas (SF6) surrounded by light gas (air) is accelerated by a planar Mach 1.2 shock. Richtmyer-Meshkov instability on the initially diffuse air-SF6 interface determines the repeatable large-scale vortex dynamics of the system after the shock passage. Subsequently secondary instabilities form, with the system eventually transitioning to turbulence. We ...

PURPOSE To describe the long-term clinical course in children with a traumatic macular hole after vitrectomy with platelet concentrate. DESIGN Interventional case series. METHODS Four pediatric patients with a mean age of 13.2 years (range, 10-15 years) underwent pars plana vitrectomy with platelet concentrate, internal limiting membrane peeling, and SF6 gas tamponade for stage 3 traumatic ...