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All posts; Tags Include "Plasma Physics"

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  • November 1, 2016
  • 09:01 AM
  • 605 views

Multiwavelength study of 20 jets that emanate from the periphery of active regions by Sargam M. Mulay et al.*

by CESRA in Solar Radio Science

Solar jets are transient phenomena observed in the solar atmosphere. They appear as sharp-edged, impulsive, and collimated flows of plasma that move outwards with a bright spot at the footpoint, which forms an ‘inverted-Y’ topology of magnetic field lines. They are observed throughout the atmosphere i.e. in the photosphere (Hα, Ca II K [...]... Read more »

Mulay et al. (2006) Multiwavelength study of 20 jets that emanate from the periphery of active regions. Astronomy . info:/

  • October 18, 2016
  • 09:02 AM
  • 635 views

Decameter type III bursts with changing frequency drift-rate signs by V. Melnik et al.*

by CESRA in Solar Radio Science

We discuss properties of type III bursts that change the sign of their drift rate from negative to positive and vice versa. Moreover, these bursts may change the sign of their drift rates more than once. These particular type III bursts were observed simultaneously by the radio telescopes UTR-2, URAN-2, [...]... Read more »

V. Melnik et al. (2015) Decameter type III bursts with changing frequency drift-rate signs . Solar Physics. info:/

  • October 4, 2016
  • 09:05 AM
  • 623 views

Propagation of Coronal Mass Ejections: Aerodynamic Drag by Nishtha Sachdeva and Prasad Subramanian

by CESRA in Solar Radio Science

Coronal Mass Ejections (CMEs) are hot, massive blobs of plasma and magnetic fields that erupt from the Sun, and are sometimes Earth-directed. Depending on their speed and mass these transients can strongly effect the space weather, causing geomagnetic storms and damage to space bound technologies. It is therefore imperative to [...]... Read more »

Sachdeva, N., Subramanian, P., Colaninno, R., et al.,. (2015) Propagation of Coronal Mass Ejections: Aerodynamic Drag. Astrophysical Journal, 158. info:/

  • September 13, 2016
  • 09:02 AM
  • 600 views

An Analysis of Interplanetary Solar Radio Emissions Associated with a Coronal Mass Ejection by V. Krupar et al.*

by CESRA in Solar Radio Science

Type II and type III bursts are generated, via the plasma emission mechanism, when beams of suprathermal electrons interact with the ambient plasma generating radio emissions at the plasma frequency fp (the fundamental emission) or at its second harmonic 2fp (the harmonic emission) [see also previous CESRA highlights here and [...]... Read more »

V. Krupar et al. (2016) An Analysis of Interplanetary Solar Radio Emissions Associated with a Coronal Mass Ejection. Astrophys. J. Lett., 823, L5. info:/

  • September 17, 2015
  • 09:00 AM
  • 1,689 views

The Martian: Getting Home Is Just Half The Problem

by Mark Lasbury in The 'Scope

"The Martian" movie opens soon! It's about an astronaut stranded on Mars who is trying to survive and find a way to get back home. But today, we humans here on Earth still have to think of clever ways to survive a trip to the red planet in the first place.... Read more »

  • May 20, 2015
  • 06:04 PM
  • 1,039 views

Tiny grains of lithium dramatically improve performance of fusion plasma

by Dr. Jekyll in Lunatic Laboratories

While fusion might still be a far off dream, a new discovery may help bring that dream closer to reality. Scientists have discovered a phenomenon that helps them to improve fusion plasmas, a finding that could quicken the development of large scale fusion energy. The scientists found that when they injected tiny grains of lithium into a plasma undergoing a particular kind of turbulence then, under the right conditions, the temperature and pressure rose dramatically.... Read more »

Kaye, S., Abrams, T., Ahn, J., Allain, J., Andre, R., Andruczyk, D., Barchfeld, R., Battaglia, D., Bhattacharjee, A., Bedoya, F.... (2015) An overview of recent physics results from NSTX. Nuclear Fusion, 55(10), 104002. DOI: 10.1088/0029-5515/55/10/104002  

  • April 7, 2015
  • 08:00 AM
  • 1,740 views

Star Trek Shields For Tanks

by Mark E. Lasbury in The 'Scope

Star Trek deflectors absorbed or deflected energy beams, but would they work against bullets or asteroids? Scientists are on working on armors and plasma systems that can stop projectiles. In some cases we use explosions to stop explosions. In others, tanks are turned into electrical pulse generators that zap incoming rockets. But the most amazing is the wall of exploding plasma that will be the first true defensive energy shield.... Read more »

Mayseless, M. (2011) Effectiveness of Explosive Reactive Armor. Journal of Applied Mechanics, 78(5), 51006. DOI: 10.1115/1.4004398  

Yoo, Y., Zheng, H., Kim, Y., Rhee, J., Kang, J., Kim, K., Cheong, H., Kim, Y., & Lee, Y. (2014) Flexible and elastic metamaterial absorber for low frequency, based on small-size unit cell. Applied Physics Letters, 105(4), 41902. DOI: 10.1063/1.4885095  

  • March 31, 2015
  • 08:00 AM
  • 1,597 views

Shields Up! Lay In A Course For Mars

by Mark E. Lasbury in The 'Scope

Deflector shields allowed Star Trek and other sci-fi franchises to have long space battles. Without them, one good strike and everyone was dead – that wouldn’t lend itself to sequels.

We don’t need shields for space battles yet, but we do need them to get to Mars. Cosmic radiation will kill or injure every astronaut unless we can deflect the radiation away from the spacecraft. We’re just about to build real deflectors, and our teachers are the magnetic fields we find ........ Read more »

  • March 3, 2015
  • 08:00 AM
  • 1,601 views

Star Trek Phasers, Coming To Us Sooner or Laser

by Mark E. Lasbury in The 'Scope

Can we make a Star Trek phaser? In a classic example of life imitating art, the militaries of many countries are actively pursuing such directed energy weapons. So far, we’ve developed high-energy lasers and masers, particle beams, and something that looks a lot like an aimed lightning bolt. But our versions are huge, what must be overcome to make hand-held versions?... Read more »

Shao, L., Cline, D., Ding, X., Ho, Y., Kong, Q., Xu, J., Pogorelsky, I., Yakimenko, V., & Kusche, K. (2013) Simulation prediction and experiment setup of vacuum laser acceleration at Brookhaven National Lab-Accelerator Test Facility. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 25-29. DOI: 10.1016/j.nima.2012.09.053  

Bartal, T., Foord, M., Bellei, C., Key, M., Flippo, K., Gaillard, S., Offermann, D., Patel, P., Jarrott, L., Higginson, D.... (2011) Focusing of short-pulse high-intensity laser-accelerated proton beams. Nature Physics, 8(2), 139-142. DOI: 10.1038/nphys2153  

Oxborrow, M., Breeze, J., & Alford, N. (2012) Room-temperature solid-state maser. Nature, 488(7411), 353-356. DOI: 10.1038/nature11339  

Peralta, E., Soong, K., England, R., Colby, E., Wu, Z., Montazeri, B., McGuinness, C., McNeur, J., Leedle, K., Walz, D.... (2013) Demonstration of electron acceleration in a laser-driven dielectric microstructure. Nature, 503(7474), 91-94. DOI: 10.1038/nature12664  

  • February 24, 2015
  • 08:00 AM
  • 1,414 views

Seeing Our Way to Invisibility

by Mark E. Lasbury in The 'Scope

Is it possible to hide in plain sight? Star Trek had cloaking devices, and Harry Potter and Frodo Baggins had their magic cloaks. In real life, we can make things disappear too. Cloaking devices are quickly becoming reality, and we bend light to make them work.... Read more »

Choi, J., & Howell, J. (2014) Paraxial ray optics cloaking. Optics Express, 22(24), 29465. DOI: 10.1364/OE.22.029465  

Fan, P., Chettiar, U., Cao, L., Afshinmanesh, F., Engheta, N., & Brongersma, M. (2012) An invisible metal–semiconductor photodetector. Nature Photonics, 6(6), 380-385. DOI: 10.1038/nphoton.2012.108  

  • February 10, 2015
  • 07:00 AM
  • 1,817 views

Sometimes Warped Thinking Is A Good Thing

by Mark E. Lasbury in The 'Scope

As Star Trek’s 50th anniversary approaches, are we getting closer to traveling at light speed? Believe it or not – yes, we are. We have begun to understand and harness the power of antimatter, and the plasma bubble-driven warp drive has moved from silly idea to serious consideration – so much so that NASA has designed a warp drive ship, the IXS Enterprise, of course.... Read more »

S. Beghella-Bartoli, P.M. Bhujbal, A. Nas. (2015) Confirmation of Santilli's detection of antimatter galaxies via a telescope with concave lens. America Journal of Modern Physics, 4(1), 34. info:/

Ganiev, Y., Gordeev, V., Krasilnikov, A., Lagutin, V., Otmennikov, V., & Panasenko, A. (2000) Aerodynamic Drag Reduction by Plasma and Hot-Gas Injection. Journal of Thermophysics and Heat Transfer, 14(1), 10-17. DOI: 10.2514/2.6504  

Ronan Keane, & Wei-Ming Zhang. (2012) Beamed Core Antimatter Propulsion: Engine Design and Optimization. J.Br.Interplanet.Soc. arXiv: 1205.2281v2

  • July 25, 2014
  • 05:48 AM
  • 1,111 views

Technique Produces Next-Gen Electrodes for Li-Ion Batteries

by dailyfusion in The Daily Fusion

Scientists at the University of Tokyo have developed an approach with industrial potential to produce nano-sized composite silicon-based powders as negative electrodes for the next generation lithium ion batteries.... Read more »

  • May 16, 2014
  • 04:35 PM
  • 1,573 views

Laser enhancement - A path to defect free diamond growth?

by Shannon Nicley Demlow in Blingtronics - Science, Engineering and Diamonds

In this post I'll take a look at an article titled "Control of crystallographic orientation in diamond synthesis through laser resonant vibrational excitation of precursor molecules" published recently in Scientific Reports. In the article, Zhi Qiang Xie and coworkers describe the potential benefits of using a laser to introduce resonant vibrations of molecules during the growth of diamond films. How can laser light improve the growth process, and does this technique hold promise........ Read more »

May, P. (2000) Diamond thin films: a 21st-century material. Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 358(1766), 473-495. DOI: 10.1098/rsta.2000.0542  

  • March 24, 2014
  • 09:01 AM
  • 929 views

New Magnetic Mechanism Could Advance Fusion Power

by dailyfusion in The Daily Fusion

A team of researchers from the University of Michigan and Princeton has uncovered a new kind of magnetic mechanism that could help make nuclear fusion reactions easier to start.... Read more »

  • February 18, 2014
  • 04:50 PM
  • 967 views

NIF Experiment Achieves Fusion Fuel Gain Exceeding Unity

by dailyfusion in The Daily Fusion

Ignition—the process of releasing fusion energy equal to or greater than the amount of energy used to confine the fuel—has long been considered the “holy grail” of inertial confinement fusion science.... Read more »

O.A. Hurricane, D.A. Callahan, D. T. Casey, P.M. Celliers, C. Cerjan, E.L. Dewald, T.R. Dittrich, T. Döppner, D.E. Hinkel, L.F. Berzak Hopkins, J.L. Kline, S. Le Pape, T. Ma, A.G. MacPhee, J.L. Milovich, A. Pak, H.-S. Park, P.K. Patel, B.A. Remingt. (2014) Fuel gain exceeding unity in an inertially confined fusion implosion. Nature. DOI: 10.1038/nature13008  

  • December 13, 2013
  • 09:48 AM
  • 867 views

Imaging Technique Helps Control Plasma in Fusion Experiments

by dailyfusion in The Daily Fusion

A recently developed imaging technique, called Electron Cyclotron Emission Imaging (ECEI), can help researchers control plasma in fusion experiments.... Read more »

Tobias B., Yu L., Domier C.W., Luhmann Jr. N.C., Austin M.E., Paz-Soldan C., Turnbull A.D., Classen I.G.J. (2013) Boundary perturbations coupled to core 3/2 tearing modes on the DIII-D tokamak. Plasma Physics and Controlled Fusion, 55(9). DOI: 10.1088/0741-3335/55/9/095006  

  • December 8, 2013
  • 05:15 PM
  • 735 views

New Way to Sustain Controlled Fusion Reactions Found

by dailyfusion in The Daily Fusion

A multinational team led by Chinese researchers in collaboration with U.S. and European partners has successfully demonstrated a new method for suppressing instabilities that can cut short the life of controlled fusion reactions.... Read more »

J. Li, H.Y. Guo, B.N. Wan, X.Z. Gong, Y.F. Liang, G.S. Xu, K.F. Gan, J.S. Hu, H.Q. Wang, L. Wang, L. Zeng, Y.P. Zhao, P. Denner, G.L. Jackson, A. Loarte, R. Maingi, J.E. Menard, M. Rack, X.L. Zou. (2013) A long-pulse high-confinement plasma regime in the Experimental Advanced Superconducting Tokamak. Nature Physics, 817-821. DOI: 10.1038/nphys2795  

  • November 12, 2012
  • 06:54 AM
  • 1,076 views

CERN collider could be world’s fastest stopwatch

by Flora Malein in floramalein.com

The clock would keep time based on extremely short light pulses given out when ‘heavy ions’, nuclei that belong to heavy atoms such as lead, are smashed together at speed within the collider. To read more click here. Sources:  Ipp, A., & Somkuti, P. (2012). Yoctosecond Metrology Through Hanbury Brown–Twiss Correlations from a Quark-Gluon Plasma [...]... Read more »

  • August 8, 2012
  • 03:10 PM
  • 1,742 views

Blasting Biofilms with Plasma Torches

by Chris Tucker in The Mycelium Connection

Killing a fungus doesn't mean you are free from its infectious grasp. You see many pathogenic fungi (and bacteria) grow in what is referred to as a biofilm, and killing the fungus doesn't make the biofilm magically disappear. If you think for a second that is obvious; killing a person wouldn't make the body go away, if it did the boys from Pulp Fiction would never have called in The Wolf.Anyway, the biofilm is the complex of organisms living together in a self created extracellular matrix. That ........ Read more »

Katja Fricke, Ina Koban, Helena Tresp, Lukasz Jablonowski, Karston Schroder, Axel Kramer, Klaus-Dieter Weltman, Thomas von Woedtke, & Thomas Kocher. (2012) Atmospheric Pressure Plasma: A High-Performance Tool for the Efficient Removal of Biofilms. PLoS One. DOI: 10.1371/journal.pone.0042539  

  • February 17, 2012
  • 05:00 PM
  • 1,763 views

'Dropout' electrons get pushed out of Van Allen belts

by Kelly Oakes in Basic Space

Judging by the many flares erupting from the sun at the moment, it is well on track to reach its next peak in activity early next year. As this peak approaches, we can expect many more huge bursts of energy that erupt from the sun and send lots of energetic particles, and sometimes magnetic fields, our way. These in turn will lead to more of the fantastic light displays, which you might have seen (or at least heard about) lately, creeping down from the North Pole towards the equator.... Read more »

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