Power dissipation mode transition by a magnetic field

2002 ◽  
Vol 81 (14) ◽  
pp. 2529-2531 ◽  
Author(s):  
S. J. You ◽  
C. W. Chung ◽  
K. H. Bai ◽  
H. Y. Chang
Keyword(s):  
Magnetic Field ◽  
Power Dissipation ◽  
Mode Transition

Re-adjustments for MOM calculations of microstrip and stripline power dissipation

2020 ◽  
pp. 1-11
Author(s):  
Frederick Huang
Keyword(s):  
Magnetic Field ◽  
Method Of Moments ◽  
Current Density ◽  
Power Dissipation ◽  
Finite Thickness ◽  
The Other ◽  
Integration Limit ◽  
Large Current ◽  
Large Current Density ◽  
Parallel Strips

Abstract Microstrip and stripline losses in Method of Moments (MOM) calculations have an error arising from the large current density at the strip edges, characterized by an integration limit (W/2-d) in the equation for current density in thin strips (width W), where d is a fitting parameter. It depends primarily on the width of the MOM subsection on the edge of the strip. By comparing with the integration limit (W/2-Δ) for an actual strip with finite thickness, a correction factor is estimated. The equations incorporating d are confirmed by comparing with MOM calculations of isolated stripline, uniformly spaced parallel strips, striplines and microstrips close to ground planes, and with a strip in a uniform, externally applied magnetic field. The results are also consistent with measurements with copper. This makes the accuracy of the loss estimates commensurate with the excellence of the other aspects of MOM simulations.

Power dissipation and mode transition in an RF discharge with multi-hollow cathode electrode

2010 ◽  
Vol 518 (22) ◽  
pp. 6682-6685 ◽  
Author(s):  
Yun-Seong Lee ◽  
Hun-Su Lee ◽  
Hong-Young Chang
Keyword(s):  
Hollow Cathode ◽  
Power Dissipation ◽  
Rf Discharge ◽  
Mode Transition ◽  
Cathode Electrode

scholarly journals Mode transition for power dissipation induced by driving frequency in capacitively coupled plasma

2003 ◽  
Vol 94 (12) ◽  
pp. 7422 ◽  
Author(s):  
S. J. You ◽  
H. C. Kim ◽  
C. W. Chung ◽  
H. Y. Chang ◽  
J. K. Lee
Keyword(s):  
Power Dissipation ◽  
Driving Frequency ◽  
Mode Transition ◽  
Capacitively Coupled ◽  
Capacitively Coupled Plasma

scholarly journals Enhancing Magnetic Hyperthermia Nanoparticle Heating Efficiency with Non-Sinusoidal Alternating Magnetic Field Waveforms

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3240
Author(s):  
Michael Zeinoun ◽  
Javier Domingo-Diez ◽  
Miguel Rodriguez-Garcia ◽  
Oscar Garcia ◽  
Miroslav Vasic ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Magnetic Nanoparticles ◽  
Heat Production ◽  
Power Dissipation ◽  
Magnetic Hyperthermia ◽  
Experimental Results ◽  
Production Performance ◽  
Alternating Magnetic Field ◽  
In Vivo Studies ◽  
Sinusoidal Signals

For decades now, conventional sinusoidal signals have been exclusively used in magnetic hyperthermia as the only alternating magnetic field waveform to excite magnetic nanoparticles. However, there are no theoretical nor experimental reasons that prevent the use of different waveforms. The only justifiable motive behind using the sinusoidal signal is its availability and the facility to produce it. Following the development of a configurable alternating magnetic field generator, we aim to study the effect of various waveforms on the heat production effectiveness of magnetic nanoparticles, seeking to prove that signals with more significant slope values, such as the trapezoidal and almost-square signals, allow the nanoparticles to reach higher efficiency in heat generation. Furthermore, we seek to point out that the nanoparticle power dissipation is dependent on the waveform’s slope and not only the frequency, magnetic field intensity and the nanoparticle size. The experimental results showed a remarkably higher heat production performance of the nanoparticles when exposed to trapezoidal and almost-square signals than conventional sinusoidal signals. We conclude that the nanoparticles respond better to the trapezoidal and almost-square signals. On the other hand, the experimental results were used to calculate the normalized power dissipation value and prove its dependency on the slope. However, adjustments are necessary to the coil before proceeding with in vitro and in vivo studies to handle the magnetic fields required.

Mode transition of power dissipation and plasma parameters in an asymmetric capacitive discharge

2013 ◽  
Vol 547 ◽  
pp. 38-42
Author(s):  
Soo-Jin Lee ◽  
Hyo-Chang Lee ◽  
Jin-young Bang ◽  
Seung-Ju Oh ◽  
Chin-Wook Chung
Keyword(s):  
Power Dissipation ◽  
Mode Transition ◽  
Plasma Parameters ◽  
Capacitive Discharge

Technique for Studying Overcurrent Behavior in YBCO Coated Conductors Using a Localized Magnetic Field

2005 ◽  
Vol 868 ◽  
Author(s):  
J. Yates Coulter ◽  
Stephen P. Ashworth ◽  
Paul C. Dowden ◽  
Jeffrey O. Willis
Keyword(s):  
Magnetic Field ◽  
Temperature Rise ◽  
Power Dissipation ◽  
High Temperature Superconductor ◽  
Coated Conductors ◽  
Spatial Gradient ◽  
Current Events ◽  
Ybco Coated Conductors ◽  
Superconductor Tape ◽  
Localized Magnetic Field

AbstractOver current stabilization of YBa2Cu30x (YBCO) coated conductor high temperature superconductor tape is required in most applications. The conductor must carry currents in excess of the critical current, Ic, without damage during over current events. Conductor damage is the result of joule heating and excessive temperature rise in regions with low Ic. We have developed and applied a measurement technique using a locally applied magnetic field with a high spatial gradient to define a small area over which the Ic is depressed. By measuring the voltage and temperature as a function of current, power dissipation and temperature rise were determined. Unstabilized conductors experienced thermal runaway and are easily damaged. Copper stabilizers applied by electroplating decreased dramatically the temperature rise and increased the level of power dissipation compared with the unstabilized conductor.

scholarly journals Released power in a vortex-antivortex pairs annihilation process

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Cristian Aguirre-Tellez ◽  
Miryam Rincón-Joya ◽  
José José Barba-Ortega
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Diffusion Equation ◽  
Power Dissipation ◽  
Time Dependent ◽  
Thermal Dissipation ◽  
Annihilation Process ◽  
Ginzburg Landau ◽  
Dissipation Process ◽  
Ginzburg Landau Equations

In this paper, we studied the power dissipation process of a Shubnikov vortex-antivortex pair in a mesoscopic superconducting square sample with a concentric square defect in presence of an oscillatory external magnetic field. The time-dependent Ginzburg-Landau equations and the diffusion equation were numerically solved. The significant result is that the thermal dissipation is associated with a sizeable relaxation of the superconducting electrons, so that the power released in this kind of process might become calculated as a function of the time. Also, we analyzed the effect that the Ginbzurg-Landau κand deformation τparameters have on the magnetization, dissipate power and super-electrons density.

scholarly journals The Soft Mode Transition Induced by Magnetic Field and Pressure in TlCuCl3and Related Dimer Compounds

2005 ◽  
Vol 159 ◽  
pp. 200-207
Author(s):  
Masashige Matsumoto ◽  
B. Normand ◽  
T. M. Rice ◽  
Manfred Sigrist
Keyword(s):  
Magnetic Field ◽  
Soft Mode ◽  
Mode Transition
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