Plasma

MBMS measured H2O2 and OH densities as function of distance. The full lines represent results of the 2D axially symmetric fluid model of the species transport and reaction kinetics in the plasma effluent. The dotted, dashed and short dotted lines represent the model results for nini,H = 1 x 1013cm-3, nini,H = 1 x 1014cm-3 and nini,H = 2 x 1014cm-3 respectively. The line indicated by "diffusion only" shows the effect on nH2O2 due to radial diffusion losses only. Due to experimental constraints, HO2 was only measured for one distance point. Image taken from Gert Willems et al 2017 J. Phys. D: Appl. Phys. 50 335204, © IOP Publishing, All Rights Reserved.

Quantifying plasma chemistry products at atmospheric pressure

By Georgia Longstaff on October 20, 2017

An atmospheric plasma produces many species. But which ones, and what role do they play? We take a closer look.

Band edges for intrinsic silicon dioxide (left panel) and intrinsic silicon (right panel) in contact with a hydrogen plasma. Inside the wall solid red (blue) curves are the edges of the conduction (valence) band while in front of it the curves give the potential energy for an electron (ion). Dashed blue curves indicate the edges for the valence band holes. Distances from the interface at z=0 are measured in the wall's (plasma's) electron Debye screening length. The profiles inside the light grey regions have no direct physical meaning. They arise from implementing technically the physical boundary conditions for the double layer responsible for the band bending. The electron (ion) temperature of the plasma is 2 eV (0.2 eV). Image taken from Franz X Bronold and Holger Fehske 2017 J. Phys. D: Appl. Phys. 50 294003 © IOP Publishing, All Rights Reserved.

Electronic response of a plasma-facing dielectric solid

By Georgia Longstaff on August 25, 2017

Towards a microscopic understanding of the transfer of the plasma’s electronic non-equilibrium to a solid.

Plasma grid at 14 kVpp. Image taken from I Adamovich et al 2017 J. Phys. D: Appl. Phys. 50 323001, © IOP Publishing, All Rights Reserved.

Introducing the 2017 Plasma Roadmap: Low temperature plasma science and technology

By Dean Williams on July 14, 2017

JPhysD presents the 2017 Plasma Roadmap: the first of a planned series of periodic updates to the original Plasma Roadmap that was published in 2012.

An interview with Emerging Leader Endre Szili

By Dean Williams on July 7, 2017

“I am hoping that there will be an even higher level of cooperation and collaboration amongst researchers and clinicians in this field, leading to larger, multi-centre clinical trials of plasma in wound decontamination/healing and cancer therapy.”

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