115 results about "Plasma radiation" patented technology

Plasma discharge sources for generating emissions in the VUV, EUV and X-ray spectral regions. Embodiments can include running a current through liquid jet streams within space to initiate plasma discharges. Additional embodiments can include liquid droplets within the space to initiate plasma discharges. One embodiment can form a substantially cylindrical plasma sheath. Another embodiment can form a substantially conical plasma sheath. Another embodiment can form bright spherical light emission from a cross-over of linear expanding plasmas. All the embodiments can generate light emitting plasmas within a space by applying voltage to electrodes adjacent to the space. All the radiative emissions are characteristic of the materials comprising the liquid jet streams or liquid droplets.

The present invention proposes one kind of 3D real-time monitoring device for laser welding and cutting process. The 3D real-time monitoring device can acquire the coaxial infrared waveband and plasma radiation light signal for real-time quality monitoring. Compared with available technology acquiring only one kind of radiation light information, the present invention has the advantage of providing more precise information for the closed-loop control of 3D laser processing.

This device comprises a pulsed laser source (6), means (8, 10, 12) for focusing light from this source onto an object to be analysed (2) to produce plasma on the surface of the object, means (16, 18) of analyzing a plasma radiation spectrum, means (20) of determining the elementary composition of the object from this analysis, and possibly means (4) for displacing the object. The invention is particularly applicable to test radioactive materials.

A plasma radiation source is improved in such a way that the lifetime of the optics which is limited by the influence of debris is appreciably increased. A gas curtain through which the radiation proceeding from a source region in a vacuum chamber is emitted at a defined solid angle for debris suppression along an axis of the mean propagation direction of the radiation exits as a radially directed supersonic gas jet from a propulsion nozzle of a gas jet vacuum pump, which propulsion nozzle is arranged on the axis. The gas curtain is directed to an annular mixing nozzle that is arranged coaxial to the axis and is guided out of the vacuum chamber by a diffuser. This makes it possible to use source arrangements having an optimal conversion efficiency but extensive debris.

The invention provides a method for preparing sheet-shaped nanometer Mg(OH)2 by using electrolyte diaphragm discharge plasma, and belongs to the technical field of preparation of nanometer materials. With a magnesium piece as an anode and a carbon rod as a cathode, instant high temperature and local high pressure are generated along with luminescence and shock waves in liquid by using an electrolyte diaphragm discharge plasma radiation principle; meanwhile, such high-activity particles as HO-, H-, O-, HO2- and H2O2 are generated; and the active particles can trigger multiple chemical reactions to accelerate such reactions as oxidation, reduction, decomposition and hydrolysis to prepare nanometer particles. The method for preparing the sheet-shaped nanometer Mg(OH)2 by using the electrolyte discharge plasma of a sacrificial anode has the advantages of simple equipment, easy operation, mild conditions (wherein room temperature is provided and other gas is not required for protection) and controllable process (wherein, by changing such parameters as electrolyte concentration, voltage or current magnitude and electrifying time, the sheet-shaped nanometer Mg(OH)2 with different structures and different particle sizes can be acquired), and is a new environment-friendly green preparation technology of sheet-shaped nanometer Mg(OH)2.

The invention provides a jeans garment shaping liquid as well as a preparation method and an application thereof in an ultraviolet light photocatalytic shaping and finishing method and relates to a jeans garment shaping liquid. The jeans garment shaping liquid comprises the following components in percentage by weight: 5.0-15.0 percent of polycarboxylic acid, 3.0-9.0 percent of sodium hypophosphite, 0.1-2.0 percent of Fe<3+>doped nanometer titanium dioxide, 1.0-5.0 percent of penetrating agents, 2.0-5.0 percent of formaldehyde-free environmentally-friendly stiffening agents, 3.0-5.0 percent of smooth brighteners and 59.0-85.9 percent of water. The invention also relates to the jeans garment ultraviolet light photocatalytic shaping and finishing method by adopting the shaping liquid, which comprises the following steps of: carrying out plasma radiation treatment on a part of a jeans garment required to be shaped, spraying the shaping liquid onto the treated part of the jeans garment, pre-drying on a drying tunnel-type drying oven and crinkling the treated part of the jeans garment; then carrying out photocatalytic shaping on the treated parts; and finally washing and drying. The method is high in catalytic efficiency, is environmental-friendly and energy-saving and is high in production efficiency. The finished jeans garment is durable, is good in shaping effect and good in handfeel and gloss, is environmental-friendly and generates no formaldehyde emission.

A film deposition process for depositing an amorphous metal oxide film, for example, an amorphous tantalum oxide film and a film treatment process for improving film quality of the amorphous tantalum oxide film in the state in which an amorphous state of the amorphous metal oxide film is being maintained by a high-density plasma radiation treatment based upon ion and radical reactions and which contains at least oxygen at an ion current density higher than 5 mA / cm2 are carried out, whereby a low-temperature treatment in the whole process is made possible. In addition, since the amorphous metal oxide film, which is excellent in film quality, can be deposited, the amorphous metal oxide film can be made high in reliability and can be produced inexpensively. The amorphous tantalum oxide film which is excellent in film quality can be manufactured inexpensively by a low-temperature treatment. Also, when a capacitance element having an amorphous metal oxide film and a semiconductor device are manufactured, the amorphous metal oxide film which is excellent in film quality can be deposited by a low-temperature treatment and highly-reliable capacitance element and semiconductor device can be manufactured.

The invention provides a detection method and system for a high-speed near-space aerocraft. A signal produced in a physical process in a plasma sheath produced by the aerocraft self is used for detecting the aerocraft, and the method comprises the following steps: acquiring electromagnetic wave of plasma radiation for the high-speed near-space aerocraft; acquiring flight characteristics of the high-speed near-space aerocraft according to the electromagnetic characteristics carried by the electromagnetic wave of the plasma radiation, wherein the electromagnetic characteristics comprise one or combination of the frequency, delay and doppler information, and the flight characteristics comprise one or combination of the distance, the azimuth angle, the altitude angle and the speed. By applyingthe technical scheme disclosed by the invention, the effective detection of the near-space aerocraft can be realized.

The invention relates to light sources with laser pumping and to methods for generating radiation with a high luminance in the ultraviolet (UV) and visible spectral ranges. The technical result of the invention includes extending the functional possibilities of a light source with laser pumping by virtue of increasing the luminance, increasing the coefficient of absorption of the laser radiation by a plasma, and significantly reducing the numerical aperture of a divergent laser beam which is to be occluded and which is passing through the plasma. The device comprises a chamber containing a gas, a laser producing a laser beam, an optical element, a region of radiating plasma produced in the chamber by the focused laser beam, an occluder, which is mounted on the axis of the divergent laser beam on the second side of the chamber, and an optical system for collecting plasma radiation.