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FEATURED STORIES - MARCH 2017

"Parametric Simulation on Reduction of S-Band Rear Bistatic Radar Cross Section of Jet Engine With Vector Thrust Nozzle via Plasmatized Exhaust"

by Shen Shou Max Chung

The feasibility of using plasmatized exhaust to reduce engine rear bistatic radar cross section (RCS) is studied. The possible range of plasma density inside a jet engine when alkaline additives are used in fuel is analyzed via the Saha equation, and the results show that there should be high density plasma. Next, the S-band rear bistatic RCS of a jet engine with or without the vector thrust nozzle is simulated using a finite difference time-domain code. Then, the RCS when exhaust is plasmatized is simulated to make comparison. The results show that even with low density plasma, the effective shape of the vector thrust nozzle is changed, and the RCS is reduced. As the plasma density becomes higher, the reflection becomes stronger and the radar wave penetration into the plasmatized exhaust becomes less. The change in RCS is strongly related to the direction and shape of the jet exhaust, besides the plasma density more...
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"Numerical Simulation of the Chemical Combination and Dissociation Reactions of Neutral Particles in a Rarefied Plasma Arc Jet"

by Jie Li, Derek Ingham, Lin Ma, Ning Wang, and Mohamed Pourkashanian

The expansion of neutral particles in a plasma arc jet is crucial for the distribution of the ions and electrons, especially in an unsteady rarefied plasma arc jet with chemical reactions. A 3-D unsteady investigation of neutral particles in a rarefied flow with chemical combination and dissociation reactions is numerically simulated based on an in-house direct simulation Monte Carlo (DSMC) code. The evolution of the neutral particles flow in vacuum cylinders is presented, and the influence of the chemical reactions has been investigated for the neutral particles. The predicted results imply that the dissociation reaction plays a key role in the expansion of the neutral particles process. In order to study the expansion of the neutral particles in an electric field, an electrostatic particle-in-cell (PIC) and DSMC are combined to simulate the axisymmetric rarefied plasma flows with chemical reactions. Two sets of grids are employed for the DSMC/PIC method by considering the different requirements of both the methods based on the molecule mean free path and the Debye length. The properties of both the flow and electric fields are analyzed in detail. It is found that the electric potential increases if the initial velocity of the ions from the inlet is sufficiently large, and accordingly, the number density of the ions in the flow field increases further. more...
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A PUBLICATION OF THE IEEE NUCLEAR AND PLASMA SCIENCES SOCIETY

MARCH 2017   |  VOLUME 45  |  NUMBER 3  |  ITPSBD  |  (ISSN 0093-3813)

REGULAR PAPERS
Basic Processes in Fully and Partially Ionized Plasmas
Comparisons of the Characteristic on the Mode Transition in an Inductively Coupled Discharge by Exciting Coil Change . . . . . . . . . . . . . . . . . .
     . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X. Zhang, J.-X. Cao, Y. Liu, Y.-P. Wang, P.-C. Yu, and Z.-K. Zhang
Comparison Between Conventional and Transferred DBD Plasma Jets for Processing of PDMS Surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
     . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F. do Nascimento, M. Machida, M. A. Canesqui, and S. A. Moshkalev
Shaping Diverted Plasmas With Symplectic Maps . . . . . . . . . . . . . . . . . . . . . . G. Roberson, M. Roberto, I. L. Caldas, T. Kroetz, and R. L. Viana

Microwave Generation and Microwave-Plasma Interaction
Effects of a Hypersonic Plasma Sheath on the Performances of Dipole Antenna and Horn Antenna . . . . . . . . . . . . . . . . . . . J. Mei and Y.-J. Xie
A 650-GHz Backward Wave Oscillator Based on Axial Loaded Double Defected-Photonic Crystal SWS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
     . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A. I Nashed, S. K. Chaudhuri, and S. Safavi-Naeini
Experimental Studies on Radiation Intensification in Gigahertz Radio Frequency Band by Subwavelength Plasma Structures . . . . . . . . . . . . . . .
      . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . F.-R. Kong, Y.-F. Sun, S. Lin, Q.-Y. Nie, Z.-B. Wang, Z.-L. Zhang, B.-W. Li, and B.-H. Jiang
Parametric Simulation on Reduction of S-Band Rear Bistatic Radar Cross Section of Jet Engine With Vector Thrust Nozzle
     via Plasmatized Exhaust
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . S. S. M. Chung

Charged Particle Beams and Sources
Analysis of Experimental Results on Pseudospark Discharge-Based Electron Beams With Simulation Model . . . . . . . . . . . . . . . . . . . . . . . . . . . .
     . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . N. Kumar, A. S. Jadon, P. Shukla, U. N. Pal, and R. Prakash

Industrial, Commercial, and Medical Applications of Plasmas
Plasma Actuator Performance Driven by Dual-Power Supply Voltage—AC High Voltage Superimposed With Pulse Bias Voltage . . . . . . . . . . . .
      . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X.-H. Qi, L. Yang, H.-J. Yan, Y. Jin, and C.-S. Ren

Pulsed Power Science and Technology
Fracturing Effect of Electrohydraulic Shock Waves Generated by Plasma-Ignited Energetic Materials Explosion . . . . . . . . . . . . . . . . . . . . . . . . .
     . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Q. Liu, W. Ding, R. Han, J. Wu, Y. Jing, Y. Zhang, H. Zhou, and A. Qiu

Arcs & MHD
A Mathematical Model for Determining an Electrohydrodynamic Accelerator’s Monopolar Flow Limit During Positive Corona Discharge . . . . . . .
      . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E. D. Fylladitakis, A. X. Moronis, and M. P. Theodoridis
Nonequillibrium Effective Conductivity of a Seeded Noble Gas Flowing in a Magnetic Field . . . . . . . . . . . . . . . . . M. S. Sodha and S. Srivastava
Investigation into Limitation of Arc Erosion in LV Switches Through Application of Hybrid Switching . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
     . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . P. Oramus, M. Florkowski, A. Rybak, and J. Sroka
Performance of a Seed-Free Disk Magnetohydrodynamic Generator With Self-Excited Joule Heating in the Nozzle . . . . . . . . . . . . . . . . . . . . . . . .
      . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M. Tanaka and Y. Okuno

Space Plasmas
Numerical Simulation of the Chemical Combination and Dissociation Reactions of Neutral Particles in a Rarefied Plasma Arc Jet . . . . . . . . . . .
      . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . J. Li, D. Ingham, L. Ma, N. Wang, and M. Pourkashanian

Special Issue on Atmospheric Pressure Plasma Jets and Their Applications
A Novel DC Arc Fault Detection Method Based on Electromagnetic Radiation Signal . . . . . . . . . . . Q. Xiong, S. Ji, L. Zhu, L. Zhong, and Y. Liu

Special Issue on Plasma Assisted Technologies 2016
Degradation of Textile Dye AB 52 in an Aqueous Solution by Applying a Plasma at Atmospheric Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
      . . . . . . . . . . . J. Vergara Sánchez, C. Torres Segundo, E. Montiel Palacios, A. Gómez Díaz, P. G. Reyes Romero and H. Martinez Valencia

Special Issue-Selected Papers from APSPT9/SPSM28
Measurement of Ion Mach Number of Arcjet Plasmas by a Directional Langmuir Probe Under High-Gas Pressure . . . . . . . . . . . . . . . . . . . . . . . .
      . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . W. Sasano, T. Shikama, K. Kozue, L. Matsuoka, N. Tamura, and S. Namba
External AC Electric Field-Induced Conformational Change in Bovine Serum Albumin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
      . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . T. Okumura, K. Yamada, T. Yaegashi, K. Takahashi, B. Syuto, and K. Takaki

Special Issue on Selected Papers from SOFE 2015
Stray Magnetic Field Analysis of ITER Poloidal Field Converter Unit . . . . . . . . . . . . . . . . Y. Yang, M. Zhang, Z. Song, M. Xia, K. Yu, and L. Jiang
Validation Experiments on the 2-MW CW 170-GHz Load for the European ITER Gyrotron . . . . . . . . .W. Bin, A. Bruschi, K. Takahashi, R. Ikeda,
     Y. Oda, T. Aoki, F. Dell’Era, M. Hayashibara, D. Minelli, A. Nardone, K. Sakamoto, A. Simonetto, N. Spinicchia, M. Terakado, and N. Tsubota

Development of CFETR Integration Design Platform: Modular Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
      . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . M. Y. Ye, S. J. Wang, S. F. Mao, Z. W. Wang, G. L. Xu, X. F. Liu, J. W. Zhang, and V. S. Chan
Manufacturing and High Heat Flux Testing of Tungsten-Brazed Mock-Ups for KSTAR Divertor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
      . . . . . . . . . . . . . . . . . . . . K. M. Kim, H. T. Kim, J. H. Song, H. K. Kim, S. H. Park, S. H. Hong, B. C. Kim, H. L. Yang, Y. S. Kim, and S. Y. You

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