Tootfinder

Numerical simulations of a RF-RF hybrid plasma torch with argon at atmospheric pressure
Loann Terraz, Biruk Alemu, Santiago Eizaguirre
https://arxiv.org/abs/2508.13858 https://

Numerical simulations of a RF-RF hybrid plasma torch with argon at atmospheric pressure
We report numerical results regarding the minimum sustaining coil excitation current for a RF-RF hybrid torch operating at two different frequencies. The first coil is excited at a high-frequency, while the second coil is set at a medium frequency. The filling gas is argon, at atmospheric pressure. We use the modeling software COMSOL Multiphysics to describe the evolution of key parameters when: (i) the distance between the two coils changes, (ii) the power of the high frequency coil changes. W…

Analytical models for coated plasmonic particles: effects of shape and size-corrected dielectric function
Nikolai G. Khlebtsov, Sergey V. Zarkov
https://arxiv.org/abs/2508.11248

Analytical models for coated plasmonic particles: effects of shape and size-corrected dielectric function
Recently, modal expansion methods (MEMs) were developed to accurately predict the extinction and scattering spectra of bare and coated plasmonic particles. However, it remains uncertain whether the accuracy of analytical models is preserved when incorporating size-corrected dielectric functions. We compare numerical (COMSOL) and analytical extinction and scattering spectra for various particle shapes - rods, disks, prisms, bicones, and bipyramids - using both bulk and size-corrected dielectric …

Positron Transport System for Muonium-to-Antimuonium Conversion Experiment
Guihao Lu, Shihan Zhao, Siyuan Chen, Jian Tang
https://arxiv.org/abs/2508.07922 https://

Positron Transport System for Muonium-to-Antimuonium Conversion Experiment
Muonium-to-Antimuonium Conversion Experiment (MACE) aims to find the charged lepton flavor violation (cLFV) process. A key component of MACE is the positron transport system (PTS) to collect and transport atomic positrons from antimuonium decays, which consists of an electrostatic accelerator and a solenoid beamline. Through field simulations in \textsc{COMSOL} and particle transport simulations based on \textsc{Geant4}, the PTS can achieve a geometric acceptance of the signal at 65.81(4)\% alo…

Multiphysics Simulation and First Prototype Development of a Microwave Plasma System for Chemical Vapour Deposition (CVD) Applications
Akash Akash, Sanjeev Kumar Pandey, Venkata Sai Teja Madana, S. Manikandan, Guhan Gunasekaran, Sundar Ravi, Sethu Narayanana, C. Nikhil, Nishant Sirse, S. Sathyan, N. Arunachalam, M. S Ramachandra Rao
https://

Multiphysics Simulation and First Prototype Development of a Microwave Plasma System for Chemical Vapour Deposition (CVD) Applications
With the aid of COMSOL multiphysics simulations, a compact microwave plasma reactor operated at 2.45 GHz frequency has been designed for diamond film deposition. The reactor consists of a cylindrical cavity that resonates in the fundamental mode $TM_{01p}$ with a longitudinal field variation (p = 1). Investigations on microwave electric field and hydrogen $(H_{2})$ plasma characteristics inside the microwave plasma cavity have been carried out, which assisted in the resonant cavity optimization…

Enhancing the Propagation Length of Graphene Surface Plasmon Polaritons using a Metamaterial Substrate with a Near-Zero Refractive Index
Zoya Eremenko, Igor Volovichev
https://arxiv.org/abs/2508.04601 …

Enhancing the Propagation Length of Graphene Surface Plasmon Polaritons using a Metamaterial Substrate with a Near-Zero Refractive Index
This paper aims to investigate the conditions necessary to control, enhance, and modify the propagation length of graphene surface plasmon polaritons (SPPs) at room temperature, using an all-dielectric metamaterial substrate in comparison to suspended graphene. The analysis is conducted within a photonic crystal framework using COMSOL Multiphysics 6.2 to study the resonant modes of the all-dielectric metamaterial. Our results confirm the existence of an near-zero effective refractive index (NZE…

Analysis of RF Sheath-Driven Tungsten Erosion at RF Antenna in the WEST Tokamak
A. Kumar, W. Tierens, T. Younkin, C. Johnson, C. Klepper, A. Diaw, J. Lore, A. Grosjean, G. Urbanczyk, J. Hillairet, P. Tamain, L. Colas, C. Guillemaut, D. Current, S. Shiraiwa, N. Bertelli, the WEST Team
https://arxiv.org/abs/2507.06059

Analysis of RF Sheath-Driven Tungsten Erosion at RF Antenna in the WEST Tokamak
This study applies the newly developed STRIPE (Simulated Transport of RF Impurity Production and Emission) framework to interpret tungsten (W) erosion at RF antenna structures in the WEST tokamak. STRIPE integrates SolEdge3x for edge plasma backgrounds, COMSOL for 3D RF sheath potentials, RustBCA for sputtering yields, and GITR for impurity transport and ion energy-angle distributions. In contrast to prior work by Kumar et al. 2025 Nucl. Fusion 65, 076039, which focused on framework validation …