Online backlight unit tester based on area CCD Wei, T.-H.; Wen, J.-Y.; Chiang, W.-C. ...
2008 International Conference on Smart Manufacturing Application,
2008-April
Conference Proceeding
Concept of using charge coupled device camera embedded with a calibrated image-processing algorithm as a two-dimensional luminance meter was successfully realized and verified with a small-scale ...backlight unit tester. This built apparatus takes only 3 seconds to get data of 10,000 points spreading uniformly in a 4-inches target, with target arbitrarily oriented. These merits make the tester more attractive and suitable for an online measurement system than other BLU testers based on area CCD.
We experimentally investigate a scheme for detecting single atoms magnetically trapped on an atom chip. The detector is based on the photoionization of atoms and the subsequent detection of the ...generated ions. We describe the characterization of the ion detector with emphasis on its calibration via the correlation of ions with simultaneously generated electrons. A detection efficiency of 47.8{+-}2.6 % is measured, which is useful for single-atom detection, and close to the limit allowing atom counting with sub-Poissonian uncertainty.
In the European funded project E3Car (ENIAC) the available power module technologies for Electric Vehicles (EV) are evaluated and tested. Up to now there are some automotive qualified power modules ...mostly for Hybrid electric vehicle applications on the market with rated blocking voltage up to 600V. But there are almost no 1200V automotive power modules available. This paper describes the optimization of an industrial power module by using the Finite-Elements-Method (FEM) for an improved thermal management. Starting with existing industrial power modules in this paper the baseplate design was investigated in general with simulations and thermal measurements. Then the baseplate thickness was varied in simulation in order to get a thermal optimum due to e.g. heatspreading. Then power modules with optimized baseplate design were realized and thermally investigated. Finally power cycling tests have shown that the lifetime compared to an original industrial power module was almost doubled.
The densities of infective nematode larvae (L3/m2) in the night holding places (locally called "correos") of 2 traditionally kept N'Dama herds were estimated at weekly intervals throughout an entire ...rainy season. Herd 1 moved correos every 3 weeks whereas herd 2 remained in the same area for most of the rainy season. Removal to a new correo was invariably accompanied by a drastic drop of L3/m2. Conversely, L3/m2 increased rapidly up to values of more than 1,000 when the herds used the same night holding place for more than 3 weeks. Calves kept in herds with frequent changes of the correo showed significantly lower nematode egg counts and higher growth rates during the rainy season, combined with a reduced weight loss during the following dry season. The results of this study indicate that a regular frequent change of the correo is an effective method of reducing nematode infection risk and increasing calf growth and that this might be a sustainable part of an integrated strategic programme to control gastrointestinal nematode infections wherever correos are used.
IC manufacturers will often adopt new cassette materials for particulate control, dimensional stability, and improved thermal properties. In order to maintain tool performance, in some cases the ...introduction of these new materials introduce new demands on the vacuum system. Six cassette materials have been tested in a medium current implanter using eight pump configurations. The results show that preventing water in the load lock from getting to the process chamber is important to maximize tool throughput. This paper discusses what options are currently available to compensate for new vacuum demands that are related to hygroscopic cassette materials.
Phys. Rev. A 76, 033614 (2007) We experimentally investigate a scheme for detecting single atoms
magnetically trapped on an atom chip. The detector is based on the
photoionization of atoms and the ...subsequent detection of the generated ions. We
describe the characterization of the ion detector with emphasis on its
calibration via the correlation of ions with simultaneously generated
electrons. A detection efficiency of 47.8% (+-2.6%) is measured, which is
useful for single atom detection, and close to the limit allowing atom counting
with sub-Poissonian uncertainty.
We have studied the internal and external dynamics of a Bose-Einstein
condensate in an anharmonic magnetic waveguide. An oscillating condensate
experiences a strong coupling between the center of ...mass motion and the
internal collective modes. Due to the anharmonicity of the magnetic potential,
not only the center of mass motion shows harmonic frequency generation, but
also the internal dynamics exhibit nonlinear frequency mixing. We describe the
data with a theoretical model to high accuracy. For strong excitations we test
the experimental data for indications of a chaotic behavior.
We experimentally investigate a scheme for detecting single atoms magnetically trapped on an atom chip. The detector is based on the photoionization of atoms and the subsequent detection of the ...generated ions. We describe the characterization of the ion detector with emphasis on its calibration via the correlation of ions with simultaneously generated electrons. A detection efficiency of 47.8% (+-2.6%) is measured, which is useful for single atom detection, and close to the limit allowing atom counting with sub-Poissonian uncertainty.
We have studied the internal and external dynamics of a Bose-Einstein condensate in an anharmonic magnetic waveguide. An oscillating condensate experiences a strong coupling between the center of ...mass motion and the internal collective modes. Due to the anharmonicity of the magnetic potential, not only the center of mass motion shows harmonic frequency generation, but also the internal dynamics exhibit nonlinear frequency mixing. We describe the data with a theoretical model to high accuracy. For strong excitations we test the experimental data for indications of a chaotic behavior.
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