Academic literature on the topic 'Detector read-out techniques'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Detector read-out techniques.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Detector read-out techniques"
1
Mitrica, B., D. Stanca, M. Petcu, I. M. Brancus, R. Margineanu, A. Apostu, C. Gomoiu, et al. "A Mobile Detector for Muon Measurements Based on Two Different Techniques." Advances in High Energy Physics 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/256230.
Full textAbstract:
Precise measurements of the muon flux are important for different practical applications, both in environmental studies and for the estimation of the water equivalent depths of underground sites. A mobile detector for cosmic muon flux measurements has been set up at IFIN-HH, Romania. The device is used to measure the muon flux on different locations at the surface and underground. Its first configuration, not used in the present, has been composed of two 1 m2scintillator plates, each viewed by wave length shifters and read out by two Photomultiplier Tubes (PMTs). A more recent configuration, consists of two 1 m2detection layers, each one including four 1 · 0,25 m2large scintillator plates. The light output in each plate is collected by twelve optical fibers and then read out by one PMT. Comparative results were obtained with both configurations.
2
Leapman, R. D., and S. B. Andrews. "Comparison of Techniques for EELS Mapping in Biology." Proceedings, annual meeting, Electron Microscopy Society of America 54 (August 11, 1996): 300–301. http://dx.doi.org/10.1017/s0424820100163964.
Full textAbstract:
Elemental mapping of biological specimens by electron energy loss spectroscopy (EELS) can be carried out both in the scanning transmission electron microscope (STEM), and in the energy-filtering transmission electron microscope (EFTEM). Choosing between these two approaches is complicated by the variety of specimens that are encountered (e.g., cells or macromolecules; cryosections, plastic sections or thin films) and by the range of elemental concentrations that occur (from a few percent down to a few parts per million). Our aim here is to consider the strengths of each technique for determining elemental distributions in these different types of specimen.On one hand, it is desirable to collect a parallel EELS spectrum at each point in the specimen using the ‘spectrum-imaging’ technique in the STEM. This minimizes the electron dose and retains as much quantitative information as possible about the inelastic scattering processes in the specimen. On the other hand, collection times in the STEM are often limited by the detector read-out and by available probe current. For example, a 256 x 256 pixel image in the STEM takes at least 30 minutes to acquire with read-out time of 25 ms. The EFTEM is able to collect parallel image data using slow-scan CCD array detectors from as many as 1024 x 1024 pixels with integration times of a few seconds. Furthermore, the EFTEM has an available beam current in the µA range compared with just a few nA in the STEM. Indeed, for some applications this can result in a factor of ~100 shorter acquisition time for the EFTEM relative to the STEM. However, the EFTEM provides much less spectral information, so that the technique of choice ultimately depends on requirements for processing the spectrum at each pixel (viz., isolated edges vs. overlapping edges, uniform thickness vs. non-uniform thickness, molar vs. millimolar concentrations).
3
Lo Presti, D., D. L. Bonanno, F. Longhitano, C. Pugliatti, S. Aiello, G. A. P. Cirrone, V. Giordano, et al. "Development of a Real-Time, Large Area, High Spatial Resolution Particle Tracker Based on Scintillating Fibers." Advances in High Energy Physics 2014 (2014): 1–13. http://dx.doi.org/10.1155/2014/692908.
Full textAbstract:
The design of a detector for tracking charged particles is presented together with the characterization techniques developed to extract the main design specifications. The goals for the final detector are to achieve real-time imaging performances, a large detection area, and a high spatial resolution, particularly suitable for medical imaging applications. This paper describes the prototype of the tracker plane, which has a 20 × 20 cm2sensitive area consisting of two crossed ribbons of 500 μm square scintillating fibers. The information about the hit position extracted real-time tracker in an innovative way, using a reduced number of the read-out channels to obtain a very large detection area but with moderate costs and complexity. The performances of the tracker have been investigated usingβsources, cosmic rays, and a 62 MeV proton beam.
4
Baum, Sebastian, Thomas D. P. Edwards, Katherine Freese, and Patrick Stengel. "New Projections for Dark Matter Searches with Paleo-Detectors." Instruments 5, no. 2 (June 11, 2021): 21. http://dx.doi.org/10.3390/instruments5020021.
Full textAbstract:
Paleo-detectors are a proposed experimental technique to search for dark matter (DM). In lieu of the conventional approach of operating a tonne-scale real-time detector to search for DM-induced nuclear recoils, paleo-detectors take advantage of small samples of naturally occurring rocks on Earth that have been deep underground (≳5 km), accumulating nuclear damage tracks from recoiling nuclei for O(1)Gyr. Modern microscopy techniques promise the capability to read out nuclear damage tracks with nanometer resolution in macroscopic samples. Thanks to their O(1)Gyr integration times, paleo-detectors could constitute nuclear recoil detectors with keV recoil energy thresholds and 100 kilotonne-yr exposures. This combination would allow paleo-detectors to probe DM-nucleon cross sections orders of magnitude below existing upper limits from conventional direct detection experiments. In this article, we use improved background modeling and a new spectral analysis technique to update the sensitivity forecast for paleo-detectors. We demonstrate the robustness of the sensitivity forecast to the (lack of) ancillary measurements of the age of the samples and the parameters controlling the backgrounds, systematic mismodeling of the spectral shape of the backgrounds, and the radiopurity of the mineral samples. Specifically, we demonstrate that even if the uranium concentration in paleo-detector samples is 10−8 (per weight), many orders of magnitude larger than what we expect in the most radiopure samples obtained from ultra basic rock or marine evaporite deposits, paleo-detectors could still probe DM-nucleon cross sections below current limits. For DM masses ≲ 10 GeV/c2, the sensitivity of paleo-detectors could still reach down all the way to the conventional neutrino floor in a Xe-based direct detection experiment.
5
Altenkirch, Jens, Jens Gibmeier, Thomas Buslaps, and V. Honkimäki. "EDXRD Setup for Real Time Observation of a Gas Tungsten Arc (GTA) Welding Process." Materials Science Forum 706-709 (January 2012): 1655–60. http://dx.doi.org/10.4028/www.scientific.net/msf.706-709.1655.
Full textAbstract:
Residual stresses in welds are of major concern for the structure integrity assessment in industrial components. The stresses in the final weld can be determined relatively simple using well established destructive or non-destructive techniques. However, such measurements reflect only the final condition and it remains unclear how stresses built up during the welding process. In order to optimise the final residual stresses in the weld, it is important to monitor the formation of residual strain and stress during the welding process and as such to gain insight into the mechanisms of stress development. In this work non-destructive high energy dispersive synchrotron X-ray diffraction at a high count rate is applied in order to dissolve the welding process in-situ in time and temperature. However, the achievable time resolution at commonly used instruments is restricted by either a limited photon flux or the read out electronics of the detector system resulting in counting times usually much longer than 1sec. We present an energy dispersive detector and read-out-electronics setup realized at the high flux and energy beam line ID15A at the ESRF. The setup allowed for monitoring the strain evolution in two perpendicular directions simultaneously at a sampling rate of 5Hz, resulting in sufficient time and temperature resolution. The change in detector dead time is accounted for by a correction function, which was specifically determined for the detector setup as used for this in-situ experiment.
6
VENTURA, SANDRO. "DATA REDUCTION TECHNIQUES AND EXTRACTION OF PHYSICS PARAMETERS IN THE ICARUS DETECTOR." International Journal of Modern Physics C 05, no. 05 (October 1994): 843. http://dx.doi.org/10.1142/s0129183194000970.
Full textAbstract:
A liquid argon time projection chamber (LAr-TPC) working as an electronic bubblechamber, continually sensitive, self-triggering, able to provide 3-D imaging of any ionizing event together with a good calorimetric response was first proposed by Carlo Rubbia in 1977. In order to verify the feasibility of such a detector, the ICARUS collaboration started in 1985 an intensive R&D program aiming to solve the main technological problems. The satisfactory results obtained on small scale tests allowed us to start in 1989 the construction of a 3 ton prototype which is presently working at CERN under stable conditions without interruptions since May 1991, collecting events from cosmic rays and monochromatic gamma ray sources. The paper describes the working principles of such a detector, showing the results of the research program applied in the present prototype. Some emphasis is put into the description of the read-out apparatus, a custom designed VME-based multichannel waveform recorder. The huge number of channels and the high sampling rate essential to achieve the high resolution in the track detection make the data acquisition architecture a crucial point for event detection rate and self-triggering capabilities. At present a. complete signal analysis is performed to define those parameters needed to tune up algorithms and filtering methods that will become necessary in the future step of the ICARUS detector (hundred to thousands of tons of argon, i. e. tens of thousands of readout channels). A particular effort is made to optimize track localization algorithms, in order to achieve high efficiency data reduction by storing only those portions of signal which contain the track (thus lowering up to three orders of magnitude the event size) . From a human interface point of view, the data presentation relies on an event imaging very similar to the old fashioned bubble chambers. Besides from giving a direct feeling of what happens inside the detector, this kind of representations opens a way to the wide panorama of image processing applications: tasks as detail enhancement, pattern recognition or 3D reconstruction will helpfully inherit support from more general procedures.
7
Kowalik, Anna Natalia, Tomasz Koper, Sebastian Adamczyk, and Julian Malicki. "Comparison of dose distributions for 6MV and 15MV energy for Total Body Irradiation (TBI)." Letters in Oncology Science 16, no. 1 (March 12, 2019): 1–5. http://dx.doi.org/10.21641/los.16.1.90.
Full textAbstract:
Introduction Contemporary radiotherapy uses a number of highly specialized irradiation techniques dedicated to well-defined clinical diagnoses. Among these methods are techniques to irradiate the skin (TSEI), bone marrow (TMI) or the whole body of the patient (TBI). TBI has over the last century been used in the treatment of a variety of conditions, both benign and malignant. However, its importance has increased with the development of knowledge about the impact of ionizing radiation on the human body and the development of clinical dosimetry techniques. At present, however, this method is primarily used in the treatment of hyperplasia.
Aim The general aim of the study is to compare dose distributions at selected points of the anthropomorphic phantom under full body radiation conditions for X: 6MV and 15MV radiation. Specific objectives are defined: comparison of percent depth and function of photon emission profiles: 6MV and 15MV measured with radiofrequency hydrophobic films; measurement of doses in selected cross sections of the anthropomorphic phantom.
Material and method
A number of measuring devices and materials used in daily work by staff of the Medical Physics Department of the Greater Poland Cancer Centre were used to carry out the study part, but Alderson's anthropomorphic phantom and the radiochromic films in the form of point detectors were essential. In addition to each step of the research part, a special measuring system was prepared to reproduce the conditions prevailing during the TBI session as closely as possible. The research was carried out in three stages: Calibration of radiochromic films; PDD and OCR measurement for: 6MV and 15MV photon beam under TBI conditions; Measurement of dose distribution in selected anthropomorphic phantom's cross sections using radiochromic films in the form of point detectors.
Results For the lateral field irradiated with 6MV photon beam, the maximum compliance (less than 2%) was obtained for the elbows at the entrance and in the center of the phantom; abdomen for the detector positioned in the center of the phantom, the lungs at the entrance and the arms in the middle, and the neck at the position of the film at the entrance. In the case of the lateral field X 15MV, the highest correspondence occurred for the points: the head and the PC in the position of the film in the center of the phantom and the entrance neck. In the case of AP/PA fields for 6MV energy, the highest compatibility was obtained for the mediastinum in all positions of the film. A small difference was also obtained for the points: head in the middle and at the output of the beam; as well as PC on the output. For AP/PA X 15MV fields, the highest dose compliance not exceeding 1% was obtained for the location of the neck - at the beam entrance, and the lung and mediastinum at the detector position at the center of the phantom.
Conclusions On the basis of measurements of dose distribution at selected points of the patient's body for radiation X: 6MV and 15MV in the TBI procedure, the following conclusions can be made: Gafchromic EBT (radiochromic type film) can be successfully used for dosimetric measurements, among others. Due to their properties, such as the ability to cut from the sheet of film spot detectors of any shape and size, flexibility, low sensitivity to daylight, resistance to humidity, etc.; Their main drawback is the high cost of buying films and the long time required to prepare the detectors and then read the measured doses. Because of the low popularity of point-based EBTs in point dosing, further research is needed to improve their response to ionizing radiation. There is a noticeable increase in the difference between the dose calculated and measured as the distance between the position of individual detectors increases from the center point. The difference between the dose measured and planned in any of the cases examined does not exceed 9%. The measurements show that the method used is fast, accurate, and can be successfully used as a validation tool not only for the TBI procedure but also for other methods of cancer radiotherapy.
8
Bauer, Sondes, Sergey Lazarev, Martin Bauer, Tobias Meisch, Marian Caliebe, Václav Holý, Ferdinand Scholz, and Tilo Baumbach. "Three-dimensional reciprocal space mapping with a two-dimensional detector as a low-latency tool for investigating the influence of growth parameters on defects in semipolar GaN." Journal of Applied Crystallography 48, no. 4 (June 16, 2015): 1000–1010. http://dx.doi.org/10.1107/s1600576715009085.
Full textAbstract:
A rapid nondestructive defect assessment and quantification method based on X-ray diffraction and three-dimensional reciprocal-space mapping has been established. A fast read-out two-dimensional detector with a high dynamic range of 20 bits, in combination with a powerful data analysis software package, is set up to provide fast feedback to crystal growers with the goal of supporting the development of reduced defect density GaN growth techniques. This would contribute strongly to the improvement of the crystal quality of epitaxial structures and therefore of optoelectronic properties. The method of normalized three-dimensional reciprocal-space mapping is found to be a reliable tool which shows clearly the influence of the parameters of the metal–organic vapour phase epitaxial and hydride vapour phase epitaxial (HVPE) growth methods on the extent of the diffuse scattering streak. This method enables determination of the basal stacking faults and an exploration of the presence of other types of defect such as partial dislocations and prismatic stacking faults. Three-dimensional reciprocal-space mapping is specifically used in the manuscript to determine basal stacking faults quantitatively and to discuss the presence of partial dislocations. This newly developed method has been applied to semipolar GaN structures grown on patterned sapphire substrates (PSSs). The fitting of the diffuse scattering intensity profiles along the stacking fault streaks with simulations based on a Monte Carlo approach has delivered an accurate determination of the basal plane stacking fault density. Three-dimensional reciprocal-space mapping is shown to be a method sensitive to the influence of crystallographic surface orientation on basal stacking fault densities during investigation of semipolar (11{\overline 2}2) GaN grown on anr-plane (1{\overline 1}02) PSS and semipolar (10{\overline 1}1) GaN grown on ann-plane (11{\overline 2}3) PSS. Moreover, the influence of HVPE overgrowth at reduced temperature on the quality of semipolar (11{\overline 2}2) GaN has been studied.
9
Sharifi, Leila, Marcello De Matteis, Hubert Kroha, Robert Richter, and Andrea Baschirotto. "Time-Variant Front-End Read-Out Electronics for High-Data-Rate Detectors." Electronics 10, no. 13 (June 24, 2021): 1528. http://dx.doi.org/10.3390/electronics10131528.
Full textAbstract:
The foreseen incremental luminosity for near-future high-energy physics experiments demands evolution for the read-out electronics in terms of event data-rate. However, the filtering necessary to reject noise and meet the signal-to-noise-ratio requirements imposes a restriction on the operational speed of the conventional read-out electronics. The stringent trade-off between signal-to-noise-ratio and the event data-rate originates from the time-invariant behavior of the conventional systems. In this paper, the cases of time-variant systems are addressed, studying a benchmark with the RC-CR shaping function used in time-over-threshold methods. It was demonstrated that the time-variant systems enable a higher data-rate for the given noise performance. Moreover, taking advantage of time-variant systems, the proposed rising-edge method enables further data-rate enhancement with respect to the traditional time-over-threshold technique by reading the data from the rising edge of the analog output waveform. A comparison between the conventional time-invariant time-over-threshold technique, its time-variant equivalent and rising-edge method confirms the better performance of the latter one in terms of data-rate enhancement for a target noise performance. Moreover, design challenges for time-variant systems are briefly discussed, considering the ATLAS Monitored Drift Tube detector as a design case.
10
Geerets, Bram, Marloes Peeters, Bart Grinsven, Karolien Bers, Ward de Ceuninck, and Patrick Wagner. "Optimizing the Thermal Read-Out Technique for MIP-Based Biomimetic Sensors: Towards Nanomolar Detection Limits." Sensors 13, no. 7 (July 16, 2013): 9148–59. http://dx.doi.org/10.3390/s130709148.
Full textDissertations / Theses on the topic "Detector read-out techniques"
1
Tsai, Fu-Kai, and 蔡富凱. "The Infrared Detector Read-Out Circuit Design Using Time Delay and Integration Technique." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/86636772891859864192.
Full textAbstract:
碩士輔仁大學
電子工程學系
90
A novel CMOS readout circuit with time-delay-integration (TDI) is proposed. Using the technique, the signal-to-noise ratio can be improved. A cell failure testing circuit is applied in the design. The faulty diodes are detected. Then the current paths of the faulty diodes are cut off by the testing circuit. Thus the operation of the readout circuit is not affected by the faulty diodes. For long-wave and low-temperature infrared signal application, the readout circuit increases the detecting range by scanning the object. Moreover, the circuit structure is very simple. The device noise and power dissipation can be reduced. The readout circuit designed and fabricated by 0.35μm 1P4M n-well CMOS technology has been measurement. The power consumption of whole chip is 100mW at 3.3V power supply. The chip area is 2000×1800μm2.
2
Laurin, Mathieu. "Recherche de la matière sombre à l’aide de détecteurs à liquides surchauffés dans le cadre de l’expérience PICO/Picasso." Thèse, 2016. http://hdl.handle.net/1866/18480.
Full textAbstract:
La matière sombre compte pour 85% de la matière composant l’univers et nous ne savons toujours pas ce qu’elle est. Depuis plusieurs années, l’expérience Picasso, maintenant devenue l’expérience PICO, tente d’élucider ce mystère. Les fréons de la famille des CXFY sont utilisés comme cibles de choix dans les détecteurs à liquides surchauffés de l’expérience PICO. Situés à SNOLab, en Ontario, ces détecteurs font parties des plus performant de la recherche de la matière sombre. Lors d’interactions de particules avec le liquide en surchauffe, un changement de phase est induit par le dépôt d’énergie engendré par l’interaction. Les bulles créées par l’évènement sont alors détectées par différents capteurs afin de déterminer le type d’interaction qui a eu lieu.
Dans ce travail seront présentés les détecteurs à liquides surchauffés dans le cadre de la recherche de la matière sombre. Principalement, nous y verrons trois types de détecteurs utilisés par les expériences PICO et Picasso. Le principe de
fonctionnement de chacun des détecteurs sera exposé en premier lieu ainsi que leur fabrication, puis leur mode d’opération et l’analyse des données. Les méthodes de calibration seront par la suite expliquées pour terminer avec une description des résultats obtenus démontrant la performance de ce type de détection.Dark matter makes up 85% of the matter content of the universe and we still don’t know what it is made of. The Picasso experiment, now named PICO, has been searching for it for several years with the use of superheated liquid detectors. Following the interaction of a particle with a superheated liquid freon of the CXFY family, a bubble is formed through a phase change and is detected with several types of sensors, telling us about the nature of the event. Located at SNOLab, in Ontario, these detectors produce some of the best results in the field. The present work will go through three types of superheated liquid detectors. A full description of the working principles will be presented for each of them. In addition, the fabrication, the operation mode and the data analysis will be shown. Detector calibration techniques will then be presented with different particle sources. Finally, the most recent results will be discussed, demonstrating the performance of the superheated liquid detector technique.
Book chapters on the topic "Detector read-out techniques"
1
Kolanoski, Hermann, and Norbert Wermes. "Scintillation detectors." In Particle Detectors, 499–542. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198858362.003.0013.
Full textAbstract:
The detection of scintillation light, which is generated when an ionising particle passes certain media or when radiation is absorbed, belongs to the oldest detection techniques. Scintillation detectors are read out electronically by employing the photon detectors described in a previous chapter. Scintillators are either made of organic or of inorganic materials (crystals) with essential differences of their properties and application field. For both scintillation mechanisms, the light yield and the time dependence of the signals are explained and the specific application areas pointed out. Typical assemblies of scintillation detectors are presented which include organic scintillators as trigger and timing counters, scintillating fibres for tracking and calorimetry and inorganic crystal arrangements for calorimetry.
2
Bolse, Nico, Anne Habermehl, Carsten Eschenbaum, and Uli Lemmer. "Fluorescence Quenching Sensor Arrays for the Discrimination of Nitroaromatic Vapors." In Electronic Nose Technologies and Advances in Machine Olfaction, 58–93. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-3862-2.ch004.
Full textAbstract:
Fluorescence quenching is a promising technique for chemical sensing applications such as the detection of explosive trace vapors. Nitroaromatic explosives are one of the primary targets for this approach enabling ultra-low detection limits down to sub parts-per-billion in air. Many studies, however, focus on enhanced sensor sensitivity, whereas practical applications often require the identification and quantification of detected species. Electronic noses and efficient sensor systems are a promising solution to address this challenge. The authors review recent approaches and trends for explosive trace vapor detection and discuss theoretical concepts for fluorescence quenching as well as target analytes, sensor materials, and fabrication techniques. Statistical learning techniques such as principal component analysis and linear discriminant analysis, sensor systems, and camera-based read-out strategies are in the focus of the chapter. The authors conclude with recommendations and solutions for the elaborated challenges and with visions on future research directions.
Conference papers on the topic "Detector read-out techniques"
1
Micheron, F., D. Broussoux, and B. Richard. "X Ray Image Sensors Using A Photoconductor And An Optical Adressing Or Read Out Technique." In International Topical Meeting on Image Detection and Quality, edited by Lucien F. Guyot. SPIE, 1987. http://dx.doi.org/10.1117/12.966747.
Full text
2
Testolin, Matthew J., Lloyd C. L. Hollenberg, Andrew D. Greentree, and Cameron J. Wellard. "Single-spin detection and read-out for the solid-state quantum computer via resonant techniques." In Smart Materials, Nano-, and Micro-Smart Systems, edited by Jung-Chih Chiao, David N. Jamieson, Lorenzo Faraone, and Andrew S. Dzurak. SPIE, 2005. http://dx.doi.org/10.1117/12.583196.
Full text
3
Zhang, Youwei, Yuqing Yang, Qingfeng Li, and Le Chen. "Image Analysis of Indications in Fillet Welding by Phased Array Ultrasonic Technique." In ASME 2017 Pressure Vessels and Piping Conference. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/pvp2017-65191.
Full textAbstract:
The steel frame for carrying boiler in power generation station is usually connected by fillet welding like corner or tee joints. Traditionally, we inspect this type of welding by Magnetic Particle Testing (MT) and Dye Penetration Testing (PT), by which only the surface or near surface defects can be detected, and the internal defects in butt welding is inspected by Ultrasonic Testing (UT) and Radiographic Testing (RT). Though ultrasonic Testing (UT) has various advantage in flat butt weld, it requires a better condition on the detection surface avoiding the interference of being rough, irregular in shape, very small or thin, or not homogeneous. Due to the geometric shape or structural constrains in fillet welding, volumetric defects are sometimes unable to be detected by RT. Currently, there are no effective methods of Non-destructive examination (NDE) for the volumetric flaws in this type of welding which connects the steel column and reinforcing plate. Normally, the volumetric and plannar defects of fillet welding are commonly as: incomplete penetration, slag inclusion, porosity, lack of fusion and cracks, which have a great influence on the welding quality. This paper aims at using the advantages of Phased Array Ultrasonic Testing (PAUT) to detect the fillet weld: • Focal depth is variable. • Scanning range is large, steering beam from −89° to 89°. • Covering large volume at single position of probe. By setting different types of artificial flaws, we carried out the reliability analysis of this kind of welding with PAUT. Through observing the representative images of flaws, we can directly know the location of defects in the weld. According to the data provided by the scan software, we can read its depth and distance from the weld center line, which helps us to locate defects in weld precisely.
4
Jagutzki, Ottmar, Volker Mergel, Klaus Ullmann-Pfleger, Lutz Spielberger, Ullrich Meyer, Reinhard Doerner, and Horst W. Schmidt-Boecking. "Fast position and time-resolved read-out of micro-channelplates with the delay-line technique for single-particle and photon-detection." In SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, edited by Michael R. Descour and Sylvia S. Shen. SPIE, 1998. http://dx.doi.org/10.1117/12.328113.
Full text
5
Faegh, Samira, and Nader Jalili. "Ultra Sensitive Piezoelectric-Based Microcantilever Sensor Operating at High Modes for Detection of Ultrasmall Masses." In ASME 2013 Dynamic Systems and Control Conference. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/dscc2013-3938.
Full textAbstract:
Detection of ultrasmall masses such as proteins and pathogens has been made possible as a result of nano-technological advancements. Development of label-free and highly sensitive biosensors has enabled the transduction of molecular recognition into detectable physical quantities. MicroCantilever (MC)-based systems have played a widespread role in developing such biosensors. One of the most important drawbacks of the available biosensors their high cost. Moreover, biosensors are normally quipped with external devices such as actuator and read out systems which are bulky and expensive. A unique self-sensing detection technique is proposed in this paper in order to address the limitations of the measurement systems. A number of approaches have been reported for enhancing the sensitivity of MC-based systems including geometry modification, employing nanoparticle-enhanced MCs and operating MCs in lateral and torsional modes. Although being investigated, there have not been analytical high fidelity models describing comprehensive dynamics and behavior of MCs operating in high modes. In this study, a comprehensive mathematical modeling is presented for the proposed self-sensing detection platform operating at ultrahigh mode using distributed-parameters system modeling. Mode convergence theory was adopted to have an accurate level of estimation. An extensive experimental setup was built using piezoelectric MC operating at high mode which verified theoretical modeling results. Finally, the whole platform was utilized as a biosensor for detection of ultrasmall adsorbed mass along with the theoretical and experimental results and verification. It was proved that operating MC at ultrahigh mode increases the sensitivity of system to detect adsorbed mass as a result of increased quality factor.
6
Okungbowa, Norense, and Noorallah Rostamy. "Real Time Automatic Calibration of Flow Meters for Real-Time Hydraulic Modelling." In 2014 10th International Pipeline Conference. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/ipc2014-33609.
Full textAbstract:
Performance of flow meters is often a function of flow rate as well as properties (density and viscosity) of the fluid measured by the meters. Since comparison of flow meter readings is a key parameter in leak detection techniques, it is desirable that the readings from the flow meters are accurate and comparable. The idea behind real-time calibration of flow meters is to calibrate a flow meter (called the dependent flow meter) against another flow meter (called the independent flow meter) that is assumed to read correctly. The real-time calibration method is useful under two main conditions: i) when the reference flow meter has been calibrated to a high degree of accuracy and the flow readings from the meter are accurate; ii) when the pipeline operating conditions support the fact that the meter-in flow at one station equals the meter-out flow at the other station. By determining the deviation of the dependent flow meter reading from the independent flow meter reading, a time-averaged flow ratio is calculated. However, the flow ratio calculation and time averaging is only updated at prescribed conditions. The proper correction factor is ascertained and then applied to the dependent flow meter reading. The main advantage of using this technique is that the flow meter repeatability is reduced over time below the nominal accuracy of the dependent meter. Note that the term “calibration” in this context does not refer to the standard method of calibrating flow meter with a ‘prover’ but a technique to calculate correction multiplier for flow meter in other to improve the performance of hydraulic models.