«Getting the biggest bang out
of plasma jets.»
«Capillary plasma jets have a wide range of applications and the length
of the plasma jet is an important characteristic parameter.»
Not exact matches
One
of his main achievements was inventing a «magnetic nozzle» that could spray the
plasma particles in a high - speed
jet.
Earlier research with NASA's Chandra X-ray observatory revealed that the
jets from this AGN are carving out a pair
of giant «radio bubbles,» huge cavities in the hot, diffuse
plasma that surrounds the galaxy.
Due to mechanisms that are poorly understood, twin
jets of electrically charged gas, or
plasma, shoot out perpendicular to the disk.
That model assumes that relativistic
jets store energy primarily in the form
of hot matter (
plasma) and less in the form
of magnetic fields generated by shock waves at the front
of the
jets.
Since the researchers know the energy
of the
jet when it is produced, and can measure its energy coming out, they can calculate its energy loss, which provides clues to the density
of the
plasma and the strength
of its interaction with the
jet.
«We have made, by far, the most precise extraction to date
of a key property
of the quark - gluon
plasma, which reveals the microscopic structure
of this almost perfect liquid,» says Xin - Nian Wang, physicist in the Nuclear Science Division at Berkeley Lab and managing principal investigator
of the
JET Collaboration.
In this new work, Wang's team refined a probe that makes use
of a phenomenon researchers at Berkeley Lab first theoretically outlined 20 years ago: energy loss
of a high - energy particle, called a
jet, inside the quark gluon
plasma.
One difficulty in using a
jet as an x-ray
of the quark - gluon
plasma is the fact that a quark - gluon
plasma is a rapidly expanding ball
of fire — it doesn't sit still.
The team determined one particular property
of the quark - gluon
plasma, called the
jet transport coefficient, which characterizes the strength
of interaction between the
jet and the ultra-hot matter.
The approach taken by the
JET Collaboration to achieve it, by combining efforts
of several groups
of theorists and experimentalists, shows how to make other precise measurements
of properties
of the quark gluon
plasma in the future.»
These are spicules, and despite their abundance, scientists didn't understand how these
jets of plasma form nor did they influence the heating
of the outer layers
of the sun's atmosphere or the solar wind.
As the comet gets closer to the sun and is heated more and more, it will produce a complex and dynamic atmosphere
of gas, dust, and
plasma called a coma, full
of outbursts and
jets.
Solar physicist Bart De Pontieu
of the Lockheed Martin Solar and Astrophysics Laboratory in Palo Alto, California, and his colleagues report in the 7 January issue
of Science that they can trace
jets of plasma, or ionized gas, rising into the corona.
No light escapes from these regions, and astrophysicists like Bergmann must instead study the traces
of gas, dust, and the piercing
jets of plasma that are sometimes found in their vicinity.
In blowout
jets, the eruption
of relatively cool
plasma leads to magnetic reconnection too and this in turn drives the eruption
of hot
plasma, so that both hot and cold material are carried into space.
Late in that century researchers began investigating how
jets of plasma might be used to carve up flesh just as industrial
plasma cutters have carved up metal since the 1960s.
So these are not sort
of small players, these are major parts
of the energy budget
of an accreting black hole and by extension, they have an important impact on their environment; and the
jets associated with accreting black holes and nuclei galaxies inflate giant lobes
of plasma outside the galaxy and these heat the surrounding gas, they affect the fuel supply, they stimulate star formation, they in fact stimulate galaxy formation.
Roger Blandford is the coauthor
of the Blandford - Znajek Process, the leading explanation for how black holes produce
jets of plasma traveling at near light speed, but what's
plasma?
But there are two
jets — one that goes up and one that goes down — and these are associated with the region very close to the black hole and those
jets contain
plasmas that are moving at relativistic speeds, that is to say, speeds close to that
of light.
Even protostars — these are young stars that are just forming and making their own planetary disks and so on — they make very powerful outflows called, the same sort
of jets obviously moving at slower speeds, but they are full
of plasma, that is flowing out at high speed; white dwarfs, neutron stars, black holes big and small, they seem able to do this task, it really seems to be a very common phenomenon.
In their next study, the researchers will use combinations
of different pulse discharge circuits and discharge energies to see how these factors impact the
plasma jet length.
It requires not one but both electrodes to have a high voltage to obtain an apokamp
plasma jet, which typically develops from the bending point
of the discharge channel.
This week in Review
of Scientific Instruments, from AIP Publishing, a new study examines how the dimensions
of the capillary producing the
plasma affect the
jet's length.
«Experimental results show that the longest
plasma jet length can be obtained by adjusting the geometric factors,» said Jiaming Xiong, from the Huazhong University
of Science and Technology and one
of the authors.
Physicists working with
plasma jets, made
of a stream
of ionised matter, have just discovered a new phenomenon.
The nozzle firing a
jet of carbon nanotubes with helium
plasma off and on.
«These
jets of plasma are ejected so fast that they could traverse the length
of California in just a couple
of minutes,» said De Pontieu.
Astronomers using the National Science Foundation's Very Long Baseline Array (VLBA) have discovered
jets of plasma blasted from the cores
of distant galaxies at speeds within one - tenth
of one percent
of the speed
of light, placing these
plasma jets among the fastest objects yet seen in the Universe.
The project may involve the following topics: — Interaction
of the solar wind with magnetised and unmagnetised planets — Space weather forecasts — Numerical (HPC) and analytical modelling
of MHD wave processes and
jets in solar and astrophysical
plasma — MHD wave observations and solar magneto - seismology — Application
of advanced data analysis to solar system science — Physics
of collisionless shocks (including planetary and interplanetary shocks)-- Analysis
of multi-point measurements made by space missions, e.g Cluster (ESA), THEMIS (NASA), MMS (NASA)
Scientists from the Massachusetts Institute
of Technology, the University
of Cambridge and some other international institutions investigating this «extreme stellar output» observed
jets of hot
plasma and gas bubbles (at about 10 million degrees) blasting out from the galaxy's central black hole.
The astrophysicists used the National Science Foundation's Very Large Array (VLA) radio telescope to capture the faintest details yet seen in the
plasma jets emerging from the microquasar SS 433, an object once dubbed the «enigma
of the century.»
Jets of plasma stream out
of the black hole close to the speed
of light, and some distance away, they inflate into giant bubbles
of hot gas.
By using a telescope orbiting above the Earth, an Australian scientist has been able to get ten times closer to the core
of a powerful
jet of plasma shooting out from a black hole.
They routinely create hot
plasma jets and gas bubbles that are thought to prevent the cooling
of galaxies and regulate the formation
of stars, which requires cold hydrogen gas as a building block.
The
jet originates in the disk
of superheated gas swirling around this object and is propelled and concentrated by the intense, twisted magnetic fields trapped within this
plasma.
It has been known for long that some
of these massive black holes eject spectacular
plasma jets at a near speed -
of - light that can extend far beyond the confines
of their host galaxy.
Using high - intensity lasers at the University
of Rochester's OMEGA EP Facility focused on targets smaller than a pencil's eraser, they conducted experiments to create colliding
jets of plasma knotted by
plasma filaments and self - generated magnetic fields.
It is thought that there are magnetic fields all across the universe and they have significant impact on various cosmic phenomena including
plasma jets emanating from the vicinity
of supermassive black holes and evolution
of baby stars.
A small portion
of material gets shot back out in powerful
jets of hot gas, called
plasma, that can wreak havoc on their surroundings.
In all cases, sinusoidal fluid -
jet stimuli from different orientations suggested the underlying channels were opened not directly by deflections
of the hair bundle but by deformation
of the apical
plasma membrane.
A NASA Hubble Space Telescope (HST) view
of a 4,000 light - year long
jet of plasma emanating from the bright nucleus
of the giant elliptical galaxy M87.
Still no answer, same as you haven't explained why 500 = 1500 or how numerical models
of closed physical systems like a
jet engine or a contained high energy
plasma = numerical model
of an natural system on the scale
of our planet.