摘要:
Homogeneous, electro-viscous fluids are provided which contain aluminum soaps based on products obtained by reacting one or more mono- or polycarboxylic acid(s) or the anhydrides or semi-esters thereof with reactive aluminum compounds, such as aluminum alcoholates. The aforesaid fluids manifest high electro-rheological effect and are completely homogeneous, and do not require a dispersant.
摘要:
A focused ion beam device is described comprising a gas field ion source with an analyzer for analyzing and classifying the structure of a specimen, a controller for controlling and/or modifying the structure of the specimen according to the analysis of the analyzer, an emitter tip, the emitter tip has a base tip comprising a first material and a supertip comprising a material different from the first material, wherein the supertip is a single atom tip and the base tip is a single crystal base tip. Furthermore, the focused ion beam device has a probe current control and a sample charge control. A method of operating a focused ion beam device is provided comprising applying a voltage between a single emission center of the supertip and an electrode, supplying gas to the emitter tip, analyzing and classifying the structure of a specimen, and controlling the structure of the specimen.
摘要:
A secondary charged particle detection device for detection of a signal beam is described. The device includes a detector arrangement having at least two detection elements with active detection areas, wherein the active detection areas are separated by a gap (G), a particle optics configured for separating the signal beam into a first portion of the signal beam and into at least one second portion of the signal beam, and configured for focusing the first portion of the signal beam and the at least one second portion of the signal beam. The particle optics includes an aperture plate and at least a first inner aperture openings in the aperture plate, and at least one second radially outer aperture opening in the aperture plate, wherein the aperture plate is configured to be biased to one potential surrounding the first inner aperture opening and the at least one outer aperture opening.
摘要:
A focused ion beam device is provided, including: an ion beam column adapted to house a gas field ion source emitter with an emitter tip and an emitter area for generating ions, a heating means adapted to heat the emitter tip, one or more gas inlets adapted to introduce a first gas and at least one second gas to the emitter area, an objective lens adapted to focus the ion beam generated from the first gas or the second gas, and a controller adapted to switch between a first emitter tip temperature and a second emitter tip temperature for generating an ion beam of ions of the first gas or an ion beam of ions of the at least one second gas.
摘要:
A method and installation are disclosed which can, for example, provide for reliable, low-Nox-emission operation of a gas turbine installation with hydrogen-rich fuel gas. An exemplary gas turbine installation includes an arrangement for flue gas recirculation into a compressor inlet and for fuel gas dilution. Oxygen content in combustion air can be reduced by recirculation of recooled flue gas, and the fuel gas can be diluted with compressed flue gas. The oxygen reduction in the combustion air can lead to minimum residual oxygen in the flue gas which can be used for fuel gas dilution. As a result of the flue gas recirculation, water content in the combustion air can be increased by feedback of the water which results as a combustion product. The oxygen reduction, increased water content, and fuel dilution can reduce the flame velocity of hydrogen-rich fuel gases and enable a robust, reliable and low-emission combustion.
摘要:
A focused ion beam device is described. The device includes an ion beam column including an enclosure for housing an emitter with an emitter area for generating ions, a first gas inlet adapted to introduce a first gas to the emitter area, a second gas inlet adapted to introduce a second gas different from the first gas to the emitter area, and a switching unit adapted to switch between introducing the first gas and introducing the second gas.
摘要:
The invention relates to a method for operating a turbogroup, especially of a power generating plant, in which combustion air is fed to a compressor, compressed therein, and fed to a burner, in which a fuel, which has a higher reactivity than natural gas, is fed to the burner, in which water is injected into the combustion air upstream of the burner and evaporated therein, in which the fuel in the burner is mixed with the combustion air-water vapor mixture and combusted, in which a burner exhaust gas which is produced in the burner is fed to a turbine and expanded therein.
摘要:
The invention provides an electron beam device 1 comprising at least one field emission cathode 3 and at least one extracting electrode 5, whereby the field emission cathode 5 comprises a p-type semiconductor region 7 connected to an emitter tip 9 made of a semiconductor material, an n-type semiconductor region 11 forming a pn-diode junction 13 with the p-type semiconductor region 7 a first electric contact 15 on the p-type semiconductor region 7 and a second electric contact 17 on the n-type semiconductor region 11. The p-type semiconductor region 7 prevents the flux of free electrons to the emitter unless electrons are injected into the p-type semiconductor region 7 by the pn-diode junction 13. This way, the field emission cathode 3 can generate an electron beam where the electron beam current is controlled by the forward biasing second voltage V2 across the pn-diode junction. Such electron beam current has an improved current value stability. In addition the electron beam current does not have to be stabilized anymore by adjusting, the voltage between emitter tip 9 and extracting electrode 5 which would interfere with the electric field of electron beam optics. The present invention further provides the field emission cathode as described above and an array of field emission cathodes. The invention further provides a method to generate at least one electron beam.
摘要:
A charged particle beam apparatus is provided which comprises a charged particle source for producing a primary beam of charged particles, aperture means for collimating said primary beam of charged particles, wherein said aperture means is adapted to switch between a collimation of said primary beam resulting in a width appropriate for serial imaging of a sample as well as a collimation of said primary beam to a width appropriate for parallel imaging of said sample, a condenser lens for condensing said primary beam of charged particles, scanning means for deflecting said primary beam of charged particles, an objective lens for focusing said condensed primary beam, a sectorized detector for detecting a secondary charged particles. Also, several different operation modes of the beam apparatus are described allowing for serial imaging as well as parallel imaging.
摘要:
The invention provides a charged particle device (1) comprising: a particle source (2) for providing a charged particle beam (4), and objective lens (10) for directing the particle beam onto a specimen (8), said objective lens (10) having an optical axis (6); a particle mirror (14) located on the optical axis (6) of the objective lens (10), said particle mirror having a front surface, a back surface, a drift region (26) reaching from the back surface to the front surface for letting the charged particle beam pass from the back surface to the front surface, said drift region (26) being positioned away from the optical axis (6), and a deflecting region located on the front surface for deflecting charge particles coming from the specimen towards a detector (16).