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Hemodialysis machine, regarded as an important clinical application of regular dialysis therapy, is a necessary equipment for the treatments of uremia patients as well as blood poisoning patients. Currently, medical device manufacturers as well as metrology measurement agencies in China usually use hemodialysis machine detectors as the commonly accepted functional calibration equipment for hemodialysis...
Opto-electrical characteristics of Si-based blocked-impurity-band (BIB) detector are investigated by combing experiment with simulation. The measured black-body response characteristics at different temperature are discussed. The simulated dark current characteristics with different thicknesses of blocking layer are also presented by taking into account impurity-band effects.
The dependence of dark current on temperature has been investigated for epitaxial Si:P blocked-impurity-band (BIB) detector. For this purpose, an experimental testing system was constructed. The dark-current behavior of epitaxial Si:P BIB detector in the temperature range from 9.2K to 24.3K and the bias range from −3V to 3V has been obtained. It is shown that the detector exhibits low dark current...
A novel single-barrier In0.53Ga0.47As-AlAs tunnel diodes with asymmetric spacer layers for millimetre and THz detection were designed and fabricated. These devices meet the requirements of detectors with a much weaker temperature dependence than Schottky diodes. The I-V measurements over the temperature range 77K to 400K revealed temperature independency of the diode's characteristics within this...
The development is described of a 360 GHz sub-harmonic mixer for the active and passive sub-systems of the TeraSCREEN security scanner by STFC RAL Space. The mixers operate as predicted with state-of-the-art performance. A radiometer sensitivity measurement also shows the devices have outstanding performance.
A GaAs/AlAs Asymmetric spacer layer Tunnel diode (ASPAT) with very thin (10ML) layer of AlAs have been successfully grown by solid source molecular beam epitaxy (SSMBE). The Current-voltage (IV) characteristics of these ASPAT diodes were measured for both different emitter geometries and over the temperature range of 77 to 398K. A comparison was made between an in-house fabricated Schottky barrier...
Power supply noise in current nanometer technologies represents a growing risk, specially because of the uncertainties it produces in the critical paths delays which can result in erroneous computations. To tackle with these issues and to have a better power management, power supply monitors are necessary. Traditional approaches use an external reference or are very sensitive to temperature and process...
We demonstrate the design, fabrication and characterization of plasmonic enhanced silicon photo-detector for infrared light. Theoretical model, experimental results and comparison between different geometric configurations will be presented and discussed.
We study the response of a graphene photothermoelectric-based detector illuminated by two continuous-wave optical beams. The power and frequency dependence of the photoresponse are used to probe the graphene hot-electron cooling rates and mechanisms.
The Ge0.9Sn0.1 photoconductor was fabricated with interdigitated structures on Si using a CMOS-compatible process. Temperature-dependent responsivity and specific detectivity were measured. The peak responsivity of 2.85A/W at 77K was achieved due to enhanced photoconductive gain.
We succeeded in measuring a clear signal from a single neutron by using a solid state superconducting current biased kinetic inductance detector, which consists of a superconducting Nb meanderline and an enriched 10B neutron conversion layer. Our neutron detector is able to operate at temperatures much lower than Tc. A full width at half maximum of signal remains at a few tens ns, ensuring fast operation...
In this paper, some important parameters for a Circular Variable Filter (CVF) based spertroradiometer are tested. A standard blackbody radition source, which is calibrated and traceable to National Institute of Standards and Technology (NIST), is adopted to accomplish the test. Interesting properties are accuracy, nonlinearity, stability and Noise Equivalent Temperature (NET). The testing results...
This paper introduces some design and measurement techniques that were used in the design and the testing of an ASIC for ultra-low current sensing. The idea behind this paper is to present the limitations in sub-picoampere current measurements and demonstrate an ASIC that can accurately measure the different sources of leakage currents and the methodology of measuring. Then the leakage current can...
The World Health Organization (WHO) and the International Agency for Research on Cancer (IARC) have already classified radon as a human carcinogen and have demonstrated a correlation between environmental radon concentration and lung cancer risk. Radon dosimetry supplies valuable information about radioactive health risks in indoor environments. Dose measurements are traditionally based on laboratory...
The ALICE Collaboration is preparing a major upgrade of the experimental apparatus, planned for installation in the second long LHC shutdown in the years 2018–2019. The key element of the ALICE upgrade is the construction of the new high resolution Inner Tracking System (ITS). It will be made of seven concentric detector layers based on a 50μm thick CMOS pixel sensor with a pixel pitch of about 30...
In this article, the main destabilizing factors causing a method error in radiation thermometry are represented and examined. The operating algorithm of a new five-channel radiation thermometer is suggested. The numerical values of the thermometer method error for four different conditions of the radiometric chain were imitated. It is shown that this algorithm makes it possible to eliminate the influence...
This paper covers the development and testing of a high temperature mixed signal unit capable of sensing wide dynamic range signals from rotating sensors. This generates an output current proportional to the peak value of the applied input signal from a sensor. The developed unit includes a current peak detector block, a digital pulse generator and ESD protection. The digital data from the unit can...
A real-time atrial fibrillation (AF) detector that detects episodes with statistical methods is fabricated in a 65nm high-VT CMOS process. Detection sensitivity of 94.9 % and specificity of 95.8 % are achieved for the commonly used MIT-BIH AF database. The architecture is optimized for clock- and power-gating. The design of full-custom power switches limits the power-gating area overhead to 6%. The...
The feasibility of generating tomographic images of objects inside crude oil is investigated in this paper. Crude oil in the visible spectrum usually appears as black oil. Nevertheless, in the mid-infrared range, crude oil presents bands of high transmission. These windows of opportunities are explored to obtain data for generating cross-section images. In this paper, a first generation tomograph...
SAW device is widely used in the various passive sensing application such as temperature, mechanical force and other various measurements. The SAW devices have relatively high the temperature dependency, thus in some applications, the multiple SAW sensors are used for the temperature compensation. In such a case, the communication between the sensor and controller is highly important. This paper describes...
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