The design, alignment, calibration, and field deployment of a solid-state lightning detector is described. The primary sensing component of the detector is a potassium dihydrogen phosphate electro-optic crystal that is attached in series to a flat-plate aluminum antenna; the antenna is exposed to the ambient thundercloud electric field. A semiconductor laser diode (lambda = 685 nm), polarizing ...

In terms of quality control and for all quantitative analysis peak purity is a major task, which can be addressed in different ways. Often only peak shapes and chromatograms are taken into consideration but a very elegant possibility without the need to use a mass spectrometric detector is the comparison of spectra recorded with a diode-array detector during the registration of a chromatographi...

1 Two New Six-Port Re ectometers Covering Very Large Bandwidths Jan Hesselbarth, Frank Wiedmann, and Bernard Huyart, Member, IEEE Abstract|This paper presents two new structures for sixport re ectometers with very large operating bandwidths of more than three decades, using a combination of lumped re ectors and transmission lines. Circuits working over a range of 2 MHz to 1 300 MHz and 2 MHz to...

The supervised working FuzzyARTMAP pattern recognition algorithm has been applied to automated identification of post-consumer plastics by near-infrared spectroscopy (NIRS). Experimentally, a remote operating parallel multisensor device, based on a rapid InGaAs diode array detector combined with new collimation optics, has been used. The laboratory setup allows on-line identification of more th...

A commercial optically stimulated luminescence (OSL) system developed for radiation protection dosimetry by Landauer, Inc., the InLight microStar reader, was tested for dosimetry procedures in radiotherapy. The system uses carbon-doped aluminum oxide, Al2O3:C, as a radiation detector material. Using this OSL system, a percent depth dose curve for 60Co gamma radiation was measured in solid water...

Nanocrystals are now established light sources, and as synthesis device integration have gained maturity, new functionalities can be considered. So far, the emitted from a nanocrystal population remains mostly driven by structural properties (composition, size, shape) of particle, only limited postsynthesis tunability has been demonstrated. Here, we explore design amplitude modulators using nan...

We have searched for axions which could have been produced in the solar core using an axion helioscope which is equipped with a 2.3 m-long 4 T superconducting magnet , PIN-photodiode x-ray detectors, and a telescope mount mechanism to track the sun. A gas container to hold dispersion-matching gas has been developed and a mass region up to ma = 0.26 eV was newly explored. Preliminary analysis se...

A multichannel fluorescence detector used to detect nitroaromatic explosives in aqueous phase has been developed, which is composed of a five-channel sample-sensor unit, a measurement and control unit, a microcontroller, and a communication unit. The characteristics of the detector as developed are mainly embedded in the sensor unit, and each sensor consists of a fluorescent sensing film, a lig...

an on-line automated method for photodegradation studies of isoproturon, diuron, atrazine, fenitrothion, and metoxuron by means of liquid chromatography/mass spectrometry (lc/ms) with particle beam (pb) interface is described. surface water samples were first spiked with 50 µg/l of each pesticide and then exposed to the radiation of the medium-pressure mercury lamp. next, in regular intervals o...

A search for solar axions has been performed using an axion helioscope which is equipped with a 2.3-m long 4T superconducting magnet, a gas container to hold dispersion-matching gas, PIN-photodiode X-ray detectors, and a telescope mount mechanism to track the sun. A mass region around ma = 1eV was newly explored. From the absence of any evidence, analysis sets a limit on axion-photon coupling c...