Non-Neutral Plasma Confinement In A Cusp-Trap And Possible Application To Anti-Hydrogen Beam Generation

2005 ◽  
Author(s):  
Akihiro Mohri
Keyword(s):  
Plasma Confinement ◽  
Beam Generation ◽  
Neutral Plasma ◽  
Hydrogen Beam

The effect of asymmetries on non‐neutral plasma confinement time

1994 ◽  
Vol 1 (5) ◽  
pp. 1123-1127 ◽  
Author(s):  
J. Notte ◽  
J. Fajans
Keyword(s):  
Confinement Time ◽  
Plasma Confinement ◽  
Neutral Plasma

Laser cooling of ions in a neutral plasma

Science ◽  
2019 ◽  
Vol 363 (6422) ◽  
pp. 61-64 ◽  
Author(s):  
Thomas K. Langin ◽  
Grant M. Gorman ◽  
Thomas C. Killian
Keyword(s):  
Laser Cooling ◽  
Optical Forces ◽  
Plasma Expansion ◽  
Laboratory Studies ◽  
Ion Temperature ◽  
Plasma Confinement ◽  
Strongly Coupled ◽  
Plasma State ◽  
Neutral Plasma ◽  
Current Kinetic

Laser cooling of a neutral plasma is a challenging task because of the high temperatures typically associated with the plasma state. By using an ultracold neutral plasma created by photoionization of an ultracold atomic gas, we avoid this obstacle and demonstrate laser cooling of ions in a neutral plasma. After 135 microseconds of cooling, we observed a reduction in ion temperature by up to a factor of four, with the temperature reaching as low as 50(4) millikelvin. This pushes laboratory studies of neutral plasmas deeper into the strongly coupled regime, beyond the limits of validity of current kinetic theories for calculating transport properties. The same optical forces also retard the plasma expansion, opening avenues for neutral-plasma confinement and manipulation.

Inquiry into the Processes of Electron Beam Generation in a Magnetron Gun with Secondary-Emission Cathode

1999 ◽  
Vol 53 (4-5) ◽  
pp. 144-149
Author(s):  
N. I. Ayzatsky ◽  
A. N. Dovbnya ◽  
V. V. Zakutin ◽  
N. G. Reshetnyak ◽  
V. P. Romas'ko ◽  
...  
Keyword(s):  
Electron Beam ◽  
Secondary Emission ◽  
Electron Beam Generation ◽  
Beam Generation ◽  
Emission Cathode

JETTO simulations ofTe/Tieffects on plasma confinement

2005 ◽  
Vol 47 (3) ◽  
pp. 505-519 ◽  
Author(s):  
E Asp ◽  
J Weiland ◽  
X Garbet ◽  
P Mantica ◽  
V Parail ◽  
...  
Keyword(s):  
Plasma Confinement

scholarly journals Enhanced X-ray emission arising from laser-plasma confinement by a strong transverse magnetic field

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Evgeny D. Filippov ◽  
Sergey S. Makarov ◽  
Konstantin F. Burdonov ◽  
Weipeng Yao ◽  
Guilhem Revet ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Transverse Magnetic ◽  
Radiative Properties ◽  
Magnetic Field Direction ◽  
Solid Target ◽  
Total Plasma ◽  
Plasma Confinement ◽  
X Ray ◽  
Magnetic Compression ◽  
The Magnetic Field

AbstractWe analyze, using experiments and 3D MHD numerical simulations, the dynamic and radiative properties of a plasma ablated by a laser (1 ns, 10$$^{12}$$ 12 –10$$^{13}$$ 13 W/cm$$^2$$ 2 ) from a solid target as it expands into a homogeneous, strong magnetic field (up to 30 T) that is transverse to its main expansion axis. We find that as early as 2 ns after the start of the expansion, the plasma becomes constrained by the magnetic field. As the magnetic field strength is increased, more plasma is confined close to the target and is heated by magnetic compression. We also observe that after $$\sim 8$$ ∼ 8  ns, the plasma is being overall shaped in a slab, with the plasma being compressed perpendicularly to the magnetic field, and being extended along the magnetic field direction. This dense slab rapidly expands into vacuum; however, it contains only $$\sim 2\%$$ ∼ 2 % of the total plasma. As a result of the higher density and increased heating of the plasma confined against the laser-irradiated solid target, there is a net enhancement of the total X-ray emissivity induced by the magnetization.

scholarly journals Magnetic Confinement of an Ultracold Neutral Plasma

2021 ◽  
Vol 126 (8) ◽  
Author(s):  
G. M. Gorman ◽  
M. K. Warrens ◽  
S. J. Bradshaw ◽  
T. C. Killian
Keyword(s):  
Magnetic Confinement ◽  
Neutral Plasma

Vortex Beam Generation Based on Plasma Reflect-Array Surface at Microwave Frequencies

2021 ◽  
pp. 1-7
Author(s):  
Ehsan Koohkan ◽  
Saughar Jarchi ◽  
Ayaz Ghorbani ◽  
Mohammad Bod
Keyword(s):  
Vortex Beam ◽  
Microwave Frequencies ◽  
Beam Generation

scholarly journals Multicriterial CNN based beam generation for robotic radiosurgery of the prostate

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Stefan Gerlach ◽  
Christoph Fürweger ◽  
Theresa Hofmann ◽  
Alexander Schlaefer
Keyword(s):  
Deep Learning ◽  
Treatment Planning ◽  
Treatment Plan ◽  
Plan Quality ◽  
New Approach ◽  
Beam Generation ◽  
Radiological Features ◽  
Improve Treatment ◽  
Robotic Radiosurgery ◽  
Treatment Plans

AbstractAlthough robotic radiosurgery offers a flexible arrangement of treatment beams, generating treatment plans is computationally challenging and a time consuming process for the planner. Furthermore, different clinical goals have to be considered during planning and generally different sets of beams correspond to different clinical goals. Typically, candidate beams sampled from a randomized heuristic form the basis for treatment planning. We propose a new approach to generate candidate beams based on deep learning using radiological features as well as the desired constraints. We demonstrate that candidate beams generated for specific clinical goals can improve treatment plan quality. Furthermore, we compare two approaches to include information about constraints in the prediction. Our results show that CNN generated beams can improve treatment plan quality for different clinical goals, increasing coverage from 91.2 to 96.8% for 3,000 candidate beams on average. When including the clinical goal in the training, coverage is improved by 1.1% points.

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