The Large Plasma Device is an experimental physics device at UCLA. It is designed as a general-purpose laboratory for experimental plasma physics research. The current version of the device began operation in 2001. The modern LaPD is operated as a national user facility, which means that half the research time on the device is open to scientists at other institutions.
Machine overview
The LaPD is a pulsed-discharge device operated at a high (1Hz) repetition rate, producing a strongly magnetized background plasma which is physically large enough to support Alfvén waves. Plasma is produced from a cathode-anode discharge at one end of a 20-meter long, 1 meter diameter cylindrical vacuum vessel (diagram). The resulting plasma column is roughly 16.5 meters long and 60cm in diameter. The background magnetic field, produced by a series of large electromagnets surrounding the chamber, can be varied from 400 gauss to 2.5 kilogauss (40 to 250 mT).
Plasma parameters
Because the LaPD is a general-purpose research device, the plasma parameters are carefully selected to make diagnostics simple without the problems associated with hotter (e.g. fusion-level) plasmas, while still providing a useful environment in which to do research.
One way to contain plasma for fusion reactions is to use a tokamak, a device that applies magnetic fields to "bottle" plasma ... It will also help improve plasma modeling and the design of future devices.
Bose and other members of the team used the 20-meter-long plasma column of the Large PlasmaDevice (LAPD) at the University of California-Los Angeles (UCLA) to excite Alfv�n waves under conditions that mimic those occurring around coronal holes.
... be a kind of stellarator called a heliotron, composed of two continuous helical coils, similar to the Large Helical Device, and could operate without plasma current.
The reactor could be a kind of stellarator called a heliotron, composed of two continuous helical coils, similar to the Large Helical Device, and could operate without plasma current ...Electron cyclotron heating is adopted for plasma heating.
To develop this technology, they first started with tech used to create the Large Helical Device (LHD), which is the largest superconducting plasma device in the world ... from plasma in a magnetic field.
Tokamaks are huge devices designed to generate and contain incredible hot, charged gas—known as plasma—for nuclear fusion ... Typically, microwave radiation is directed into the plasma using devices called gyrotrons.
The NationalInstitute for FusionScience (NIFS) has been observing the emission of light from plasma in a magnetic field in the Large Helical Device (LHD) ... also attracting attention in fusion plasmas.
The device fires a laser through a vapor, creating an ionized plasma, then separates electrons from ions which creates a "wakefield," similar to the wake a boat leaves behind as it moves through water.
High-temperature fusion plasma experiments conducted in the Large Helical Device (LHD) of the National Institute for FusionScience (NIFS), have renewed the world record for an acquired data amount, ...
There is a wealth of experimental data gathered from tokamaks worldwide while the devices operated in a state free from large-scale instabilities at the plasma's edge known as edge-localized modes (ELMs).
They can also be ordered off the shelf from industrial suppliers and then embedded in a 3D-printed shell around the device's vacuum vessel, which holds the plasma.
Qian was the lead author of papers published in the Journal of Plasma Physics and Nuclear Fusion that detail the theory and engineering behind the device, known as MUSE... the devices confine plasma.
ASTI was applied to the Large Helical Device (LHD), the world's most advanced superconducting plasma experimental facility, which is equipped with many control knobs including a high-power electron ...
(MENAFN - PR Newswire) SEOUL, South Korea, Nov. 6, 2023 /PRNewswire/ -- Existing plasma odor reduction devices are large, heavy and difficult to install in small places, but Daesung's products can ... .
One recipe involves the use of large, donut-shaped devices with powerful magnets that contain a plasma while carefully aligned microwave generators heat the atomic mixture.
