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37th International Cosmic Ray Conference, ICRC 2021

作者： Borowka, Jürgen Günther, Christoph Heinen, Dirk Zierke, Simon Abbasi, R. Ackermann, M. Adams, J. Aguilar, J.A. Ahlers, M. Ahrens, M. Alispach, C. Alves, A.A. Amin, N.M. An, R. Andeen, K. Anderson, T. Anton, G. Argüelles, C. Ashida, Y. Axani, S. Bai, X. Balagopal, A.v. Barbano, A. Barwick, S.W. Bastian, B. Basu, v. Baur, S. Bay, R. Beatty, J.J. Becker, K.-H. Becker Tjus, J. Bellenghi, C. BenZvi, S. Berley, D. Bernardini, E. Besson, D.Z. Binder, G. Bindig, D. Blaufuss, E. Blot, S. Boddenberg, M. Bontempo, F. Borowka, J. Böser, S. Botner, O. Böttcher, J. Bourbeau, E. Bradascio, F. Braun, J. Bron, S. Brostean-Kaiser, J. Browne, S. Burgman, A. Burley, R.T. Busse, R.S. Campana, M.A. Carnie-Bronca, E.G. Chen, C. Chirkin, D. Choi, K. Clark, B.A. Clark, K. Classen, L. Coleman, A. Collin, G.H. Conrad, J.M. Coppin, P. Correa, P. Cowen, D.F. Cross, R. Dappen, C. Dave, P. De Clercq, C. DeLaunay, J.J. Dembinski, H. Deoskar, K. De Ridder, S. Desai, A. Desiati, P. de vries, K.D. de Wasseige, G. de With, M. DeYoung, T. Dharani, S. Diaz, A. Díaz-vélez, J.C. Dittmer, M. Dujmovic, H. Dunkman, M. Duvernois, M.A. Dvorak, E. Ehrhardt, T. Eller, P. Engel, R. Erpenbeck, H. Evans, J. Evenson, P.A. Fan, K.L. Fazely, A.R. Fiedlschuster, S. Fienberg, A.T. Filimonov, K. Finley, C. Fischer, L. Fox, D. Franckowiak, A. Friedman, E. Fritz, A. Fürst, P. Gaisser, T.K. Gallagher, J. Ganster, E. Garcia, A. Garrappa, S. Gerhardt, L. Ghadimi, A. Glaser, C. Glauch, T. Glüsenkamp, T. Goldschmidt, A. Gonzalez, J.G. Goswami, S. Grant, D. Grégoire, T. Griswold, S. Gündüz, M. Günther, C. Haack, C. Hallgren, A. Halliday, R. Halve, L. Halzen, F. Ha Minh, M. Hanson, K. Hardin, J. Harnisch, A.A. Haungs, A. Hauser, S. Hebecker, D. Helbing, K. Henningsen, F. Hettinger, E.C. Hickford, S. Hignight, J. Hill, C. Hill, G.C. Hoffman, K.D. Hoffmann, R. Hoinka, T. Hokanson-Fasig, B. Hoshina, K. Huang, F. Huber, M. Huber, T. Hultqvist, K. Hünnefeld, M. III. Physikalisches Institut B RWTH Aachen University AachenD-52056 Germany III. Physikalisches Institut RWTH Aachen University AachenD-52056 Germany Department of Physics University of Adelaide Adelaide5005 Australia Dept. of Physics and Astronomy University of Alaska Anchorage 3211 Providence Dr. AnchorageAK99508 United States Dept. of Physics University of Texas at Arlington 502 Yates St. Science Hall Rm 108 Box 19059 ArlingtonTX76019 United States CTSPS Clark-Atlanta University AtlantaGA30314 United States School of Physics Center for Relativistic Astrophysics Georgia Institute of Technology AtlantaGA30332 United States Dept. of Physics Southern University Baton RougeLA70813 United States Dept. of Physics University of California BerkeleyCA94720 United States Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Institut für Physik Humboldt-Universität zu Berlin BerlinD-12489 Germany Fakultät für Physik & Astronomie Ruhr-Universität Bochum BochumD-44780 Germany Université Libre de Bruxelles Science Faculty CP230 BrusselsB-1050 Belgium Dienst ELEM BrusselsB-1050 Belgium Department of Physics Laboratory for Particle Physics and Cosmology Harvard University CambridgeMA02138 United States Dept. of Physics Massachusetts Institute of Technology CambridgeMA02139 United States Dept. of Physics Institute for Global Prominent Research Chiba University Chiba263-8522 Japan Department of Physics Loyola University Chicago ChicagoIL60660 United States Dept. of Physics and Astronomy University of Canterbury Private Bag 4800 Christchurch New Zealand Dept. of Physics University of Maryland College ParkMD20742 United States Dept. of Astronomy Ohio State University ColumbusOH43210 United States Dept. of Physics Center for Cosmology and Astro-Particle Physics Ohio State University ColumbusOH43210 United States Niels Bohr Institute University of Copenhagen CopenhagenDK-2100 Denmark Dept. of Physics TU Dor

The IceCube Neutrino Observatory will be upgraded with more than 700 additional optical sensor modules and new calibration devices. Improved calibration will enhance IceCube’s physics capabilities both at low and high neutrino energies. An important ingredient for good angular resolution of the observatory is precise calibration of the positions of optical sensors. Ten acoustic modules, which are capable of receiving and transmitting acoustic signals, will be attached to the strings. These signals can additionally be detected by compact acoustic sensors inside some of the optical sensor modules. With this system we aim for calibration of the detectors’ geometry with a precision better than 10 cm by means of trilateration of the propagation times of acoustic signals. This new method will allow for an improved and complementary geometry calibration with respect to previously used methods based on optical flashers and drill logging data. The longer attenuation length of sound compared to light makes the acoustic module a promising candidate for IceCube-Gen2, which may have optical sensors on strings with twice the current spacing. We present an overview of the technical design and tests of the system as well as analytical methods for determining the propagation times of the acoustic signals. © Copyright owned by the author(s).

关键词： optical sensors

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Location Determination Of Optimal Emergency System For Hurricane Disaster Based On Mathematical Modeling

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Journal of Computer Science Research 2020年第1期2卷 12-15页

作者： Shizhong Ma Shilong Zhu Yujie Jiang College of Electrical Engineering North China University of Science and TechnologyTangshan063210China College of Science North China University of Science and TechnologyTangshan063210China School of Economics North China University of Science and TechnologyTangshan063210China

This article first introduces the current research status of space optical communication,and gives a brief overview of the development and application prospects of space optical communication,explaining its important research ***,the working principle of ATP in space optical communication system is studied,the mathematical model of ATP control system is established according to the actual needs,and the ATP control system design of space optical communication is *** selecting appropriate motors and gyroscopes as the actuators and detection elements of the system,substituting the actual parameters for simulation analysis,and correcting and verifying the results,some useful results are *** simulation results show the rationality and effectiveness of the ATP design scheme.

关键词： Emergency response system Reserve sites model Requirement analysis

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Featuring a new computational protocol for the estimation of intensity and overall quantum yield in lanthanide chelates with applications to Eu(III) mercapto-triazole Schiff base ligands

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optical Materials: X 2022年 16卷

作者： Moura, Renaldo T. Quintano, Mateus Santos-Jr, Carlos v. Albuquerque, vinícius A.C.A. Aguiar, Eduardo C. Kraka, Elfi Carneiro Neto, Albano N. Department of Chemistry Southern Methodist University Dallas TX75275 United States Department of Chemistry and Physics Center of Agrarian Sciences Federal University of Paraiba PB Areia58397-000 Brazil Department of Chemistry Federal University of Paraiba PB Joao Pessoa58051-970 Brazil Academic Unity of Belo Jardim Federal Rural University of Pernambuco PE Belo Jardim55156-580 Brazil Phantom-g Physics Department and CICECO - Aveiro Institute of Materials University of Aveiro Aveiro3810-193 Portugal

Computational studies on luminescent properties of lanthanides chelates are important for the pre-synthetic design of new luminescent materials. However, the development of suited computational methods and protocols is still in its infancy. Here we present a new computational protocol for a systematic description and analysis of luminescent properties of Ln(III) chelates. The new methodologies herein presented are divided in three major categories: (1) Utilization of local vibrational mode theory for obtaining local Ln–ligand force constants;(2) Calculation of ligand effective polarizabilities through complex localized molecular orbitals;and (3) Extended formulation of excited state donor–acceptor RL distances accounting for excited molecular orbitals weights. The protocol was applied to understand the underlying photophysical processes in two Eu(III) complexes with mercapto-triazole Schiff bases as main ligands, utilizing time-dependent density functional theory (ωB97X-D/MWB52(Eu)/Def2-TZvP). The introduction of local force constants into lanthanide spectroscopy led to a unique explanation of the inverse relationship between the Ln–ligand strength and ligand effective polarizability. This new protocol will contribute to a better understanding of Ln–ligand bond properties, to more accurate results in terms of Judd–Ofelt intensity parameters and overall quantum yield, and will bridge the current gap between available theoretical results and experimental data. © 2022 The Author(s)

关键词： Ligands

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Comparison of the Efficacy of Three Direct Ophthalmoscopes: A Clinical Study 20

Comparison of the Efficacy of Three Direct Ophthalmoscopes: ...

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Conference on current developments in Lens design and optical engineering XX

作者： Parthasarathy, Mohana Kuppuswamy Faruq, Ibrahim Arthurs, Eugene Lakshminarayanan, vasudevan Univ Waterloo Sch Optometry & Vis Sci Theoret & Expt Epistemol Lab Waterloo ON Canada Costco Opt Waterloo ON Canada SPIE Bellingham WA USA Univ Waterloo Dept Phys Waterloo ON Canada Univ Waterloo Dept ECE Waterloo ON Canada Univ Waterloo Dept Syst Design Engn Waterloo ON Canada

ISBN: (数字)9781510629028

ISBN: (纸本)9781510629028

Retinal examination using direct ophthalmoscope is preferred over other techniques for screening purposes because of its portability and high magnification, despite its power sustainability and cost issues. With increasing number of low-cost sustainable devices available in the market, it is important to assess the efficacy of the devices. We compared three devices - Arclight ophthalmoscope, a D-Eye attached to iPhone 6, and conventional ophthalmoscope Heine K180 - in terms of ease of examination, usage, field of view, color rendition, patient comfort, length of examination, and closeness to the eye. Two trained optometrists examined 26 undilated eyes and graded the ease of retinal examination, ease of use and assessed vertical cup:disc ratio (vCDR). Patients reported their comfort level in terms of glare produced by the light source, length of examination and closeness to the eye. The examiners had a good agreement for all assessments. Of 26 eyes, vCDR assessment was not possible in 10/ 26 (38.4%) of the examinations, in (3/26, 11.5%) examinations with Arclight, in 0/26 examinations with D-Eye. Ease of use score was higher for Arclight and D-Eye than Heine. D-Eye had a relatively larger field of view than other 2 devices. Heine ranked first in color rendition. The luminance level of the high-beam setting of Arclight was more than twice that of Heine and D-Eye. Despite that, the patients reported experiencing uncomfortable glare in Heine (14/26, 53.8%), significant glare with Arclight (16/26, 61.5%) and some/no glare with D-Eye. The examination time was shorter when using D-Eye. Overall, D-Eye scored better in most of the evaluation items followed by Arclight.

关键词： Direct Ophthalmoscope Retina cup to disc ratio D-Eye smartphone ophthalmoscope Arclight ophthalmoscope Heine ophthalmoscope solar powered ophthalmoscope

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Convergence of Edge Computing and Deep Learning: A Comprehensive Survey

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IEEE COMMUNICATIONS SURvEYS AND TUTORIALS 2020年第2期22卷 869-904页

作者： Wang, Xiaofei Han, Yiwen Leung, victor C. M. Niyato, Dusit Yan, Xueqiang Chen, Xu Tianjin Univ Coll Intelligence & Comp Tianjin Key Lab Adv Networking Tianjin 300350 Peoples R China Shenzhen Univ Coll Comp Sci & Software Engn Shenzhen 518060 Peoples R China Univ British Columbia Dept Elect & Comp Engn Vancouver BC V6T 1Z4 Canada Nanyang Technol Univ Sch Comp Sci & Engn Singapore Singapore Huawei Technol Lab 2012 Shenzhen 201206 Peoples R China Sun Yat Sen Univ Sch Data & Comp Sci Guangzhou 510006 Peoples R China

Ubiquitous sensors and smart devices from factories and communities are generating massive amounts of data, and ever-increasing computing power is driving the core of computation and services from the cloud to the edge of the network. As an important enabler broadly changing people's lives, from face recognition to ambitious smart factories and cities, developments of artificial intelligence (especially deep learning, DL) based applications and services are thriving. However, due to efficiency and latency issues, the current cloud computing service architecture hinders the vision of "providing artificial intelligence for every person and every organization at everywhere". Thus, unleashing DL services using resources at the network edge near the data sources has emerged as a desirable solution. Therefore, edge intelligence, aiming to facilitate the deployment of DL services by edge computing, has received significant attention. In addition, DL, as the representative technique of artificial intelligence, can be integrated into edge computing frameworks to build intelligent edge for dynamic, adaptive edge maintenance and management. With regard to mutually beneficial edge intelligence and intelligent edge, this paper introduces and discusses: 1) the application scenarios of both;2) the practical implementation methods and enabling technologies, namely DL training and inference in the customized edge computing framework;3) challenges and future trends of more pervasive and fine-grained intelligence. We believe that by consolidating information scattered across the communication, networking, and DL areas, this survey can help readers to understand the connections between enabling technologies while promoting further discussions on the fusion of edge intelligence and intelligent edge, i.e., Edge DL.

关键词： Edge computing Cloud computing Training Computational modeling Reliability Wireless communication Internet of Things Edge computing deep learning wireless communication computation offloading artificial intelligence

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Three-dimensional virtual histology in unprocessed resected tissues with photoacoustic remote sensing (PARS) microscopy and optical coherence tomography

arXiv

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arXiv 2021年

作者： Ecclestone, Benjamin R. Hosseinaee, Zohreh Abbasi, Nima Bell, Kevan Dinakaran, Deepak Mackey, John R. Reza, Parsin Haji PhotoMedicine Labs Department of Systems Design Engineering University of Waterloo 200 University Ave W WaterlooONN2L 3G1 Canada illumiSonics Inc. 22 King Street South Suite 300 WaterlooONN2J 1N8 Canada Cross Cancer Institute Department of Oncology University of Alberta 116 St & 85 Ave EdmontonABT6G 2V1 Canada

Histological images are critical in the diagnosis and treatment of cancers. Unfortunately, the current method for capturing these microscopy images require resource intensive tissue preparation that delays diagnosis for many days to a few weeks. To streamline this process, clinicians are limited to assessing small macroscopically representative subsets of tissues. Here, we present a combined photoacoustic remote sensing (PARS) microscope and swept source optical coherence tomography (SS-OCT) system designed to circumvent these diagnostic limitations. The proposed multimodal microscope provides label-free three-dimensional depth resolved virtual histology visualizations, capturing nuclear and extranuclear tissue morphology directly on thick unprocessed specimens. The capabilities of the proposed method are demonstrated directly in unprocessed formalin fixed resected tissues. Here, we present the first images of nuclear contrast in resected human tissues, and the first 3-dimensional visualization of subsurface nuclear morphology in resected Rattus tissues, captured with a non-contact photoacoustic system. Moreover, we present the first co-registered OCT and PARS images enabling direct histological assessment of unprocessed tissues. This work represents a vital step towards the development of a real-time histological imaging modality to circumvent the limitations of current histopathology techniques. © 2021, CC BY.

关键词： Histology

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design of Pyroelectric Infrared Detector And Micropower CMOS Integrated Circuitry Towards a Monolithic Gas Sensor 46

Design of Pyroelectric Infrared Detector And Micropower CMOS...

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46th Annual Conference of the IEEE-Industrial-Electronics-Society (IECON)

作者： Zhang, Tan-Tan Ng, Doris Keh Ting Cai, Hong Gao, Yuan ASTAR Inst Microelect Singapore Singapore

ISBN: (数字)9781728154145

ISBN: (纸本)9781728154145

With the emerging trend in miniaturization of complete optical sensor on a silicon platform for gas sensing applications, this paper presents a promising candidate towards monolithic gas sensor with features of 1) a CMOS compatible Aluminum Nitride (AlN)-based pyroelectric infrared detector (PID);2) customized micropower high-precision CMOS integrated readout circuits. In the PID design, the sensitivity and device integrity are improved with optimized sensing area and modified layer structure. In the readout circuits, to amplify the pico- amperes current from detector, a tunable resistive transimpedance amplifier (TIA) with robust pseudo-resistor in series is proposed to achieve reduced variations against process-voltage-temperature (PvT). A micropower incremental analog-to-digital converter (ADC) is designed to digitize the voltage output from TIA. In addition, to compensate the drifts induced by local temperature change around the detector, an accurate BJT-based temperature sensor is integrated in the circuits as well. Fabricated in an 8-inch wafer, the AlN-based PID with sensing area of 0.29 mm(2) achieves the detectivity of 6.04x 10(6) cm root Hz/W. The readout circuits are implemented in a 40nmCMOS process, consuming total power of 24.5 mu W under 1.2-v supply. Simulation results show that the TIA gain variation is <0.5 dB over PvT corners, the ADC achieves >11-bit resolution over 1 kHz bandwidth, and the temperature error over - 20 degrees C 80 degrees C is +/- 0.65 degrees C (3 sigma) without any calibration.

关键词： ADC emitter detector monolithic gas sensor pyroelectric transimpedance amplifier temperature sensor

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Key Challenges and Results in the design of Cubesat Laser Terminals, optical Heads and Coarse Pointing Assemblies

Key Challenges and Results in the Design of Cubesat Laser Te...

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IEEE International Conference on Space optical Systems and Applications (IEEE ICSOS)

作者： Dresscher, M. Korevaar, C. W. van der valk, N. C. J. de Lange, T. J. Saathof, R. Doelman, N. Crowcombe, W. E. Duque, C. M. de Man, H. Human, J. D. Witvoet, G. van der Heiden, N. den Breeje, R. Kuiper, S. Fritz, E. C. TNO Tech Sci Stieltjesweg 1 NL-2628 CK Delft Netherlands

ISBN: (纸本)9781728105000

The anticipated capacity benefit of optical satellite communications has triggered a cascade of technology developments. In this paper, we present three such technologies, namely;i). A cube satellite laser terminal (CubeCAT), ii). A lower Earth orbit satellite optical head (LEOCAT) and iii). A calibration and verification test bench for coarse pointing assemblies, named pointing test bench (PTB). For these technologies, pointing stability and accuracy are central challenges. For i) and ii), we discuss anticipated effects of the thermal and mechanical disturbances that threaten the optical alignment of the system. We furthermore explain the mitigation of these effects through the system design so that a high optical performance can be maintained. For iii), we discuss the mechanical design challenges, in combination with modelling and calibration procedures for the system. Effective dealing with the three of them in turn enables highly accurate mirror orientation and rotation. design specifications and current status are presented for each system.

关键词： Free space optical communications laser communication terminal laser satellite communications low earth orbit satellite smallsat cubesat optical head coarse-pointing assembly ground-support equipment.

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The Wavelength-shifting optical Module for the IceCube Upgrade 37

The Wavelength-shifting Optical Module for the IceCube Upgra...

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37th International Cosmic Ray Conference, ICRC 2021

作者： Rack-Helleis, John Pollmann, Anna Rongen, Martin Abbasi, R. Ackermann, M. Adams, J. Aguilar, J.A. Ahlers, M. Ahrens, M. Alispach, C. Alves, A.A. Amin, N.M. An, R. Andeen, K. Anderson, T. Anton, G. Argüelles, C. Ashida, Y. Axani, S. Bai, X. Balagopal, A.v. Barbano, A. Barwick, S.W. Bastian, B. Basu, v. Baur, S. Bay, R. Beatty, J.J. Becker, K.-H. Becker Tjus, J. Bellenghi, C. BenZvi, S. Berley, D. Bernardini, E. Besson, D.Z. Binder, G. Bindig, D. Blaufuss, E. Blot, S. Boddenberg, M. Bontempo, F. Borowka, J. Böser, S. Botner, O. Böttcher, J. Bourbeau, E. Bradascio, F. Braun, J. Bron, S. Brostean-Kaiser, J. Browne, S. Burgman, A. Burley, R.T. Busse, R.S. Campana, M.A. Carnie-Bronca, E.G. Chen, C. Chirkin, D. Choi, K. Clark, B.A. Clark, K. Classen, L. Coleman, A. Collin, G.H. Conrad, J.M. Coppin, P. Correa, P. Cowen, D.F. Cross, R. Dappen, C. Dave, P. De Clercq, C. DeLaunay, J.J. Dembinski, H. Deoskar, K. De Ridder, S. Desai, A. Desiati, P. de vries, K.D. de Wasseige, G. de With, M. DeYoung, T. Dharani, S. Diaz, A. Díaz-vélez, J.C. Dittmer, M. Dujmovic, H. Dunkman, M. Duvernois, M.A. Dvorak, E. Ehrhardt, T. Eller, P. Engel, R. Erpenbeck, H. Evans, J. Evenson, P.A. Fan, K.L. Fazely, A.R. Fiedlschuster, S. Fienberg, A.T. Filimonov, K. Finley, C. Fischer, L. Fox, D. Franckowiak, A. Friedman, E. Fritz, A. Fürst, P. Gaisser, T.K. Gallagher, J. Ganster, E. Garcia, A. Garrappa, S. Gerhardt, L. Ghadimi, A. Glaser, C. Glauch, T. Glüsenkamp, T. Goldschmidt, A. Gonzalez, J.G. Goswami, S. Grant, D. Grégoire, T. Griswold, S. Gündüz, M. Günther, C. Haack, C. Hallgren, A. Halliday, R. Halve, L. Halzen, F. Ha Minh, M. Hanson, K. Hardin, J. Harnisch, A.A. Haungs, A. Hauser, S. Hebecker, D. Helbing, K. Henningsen, F. Hettinger, E.C. Hickford, S. Hignight, J. Hill, C. Hill, G.C. Hoffman, K.D. Hoffmann, R. Hoinka, T. Hokanson-Fasig, B. Hoshina, K. Huang, F. Huber, M. Huber, T. Hultqvist, K. Hünnefeld, M. Institute for Physics JGU Mainz MainzD-55122 Germany Department of Physics Bergische Universität Wuppertal Gaußstraße 20 Wuppertal Germany III. Physikalisches Institut RWTH Aachen University AachenD-52056 Germany Department of Physics University of Adelaide Adelaide5005 Australia Dept. of Physics and Astronomy University of Alaska Anchorage 3211 Providence Dr. AnchorageAK99508 United States Dept. of Physics University of Texas at Arlington 502 Yates St. Science Hall Rm 108 Box 19059 ArlingtonTX76019 United States CTSPS Clark-Atlanta University AtlantaGA30314 United States School of Physics Center for Relativistic Astrophysics Georgia Institute of Technology AtlantaGA30332 United States Dept. of Physics Southern University Baton RougeLA70813 United States Dept. of Physics University of California BerkeleyCA94720 United States Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Institut für Physik Humboldt-Universität zu Berlin BerlinD-12489 Germany Fakultät für Physik & Astronomie Ruhr-Universität Bochum BochumD-44780 Germany Université Libre de Bruxelles Science Faculty CP230 BrusselsB-1050 Belgium Dienst ELEM BrusselsB-1050 Belgium Department of Physics Laboratory for Particle Physics and Cosmology Harvard University CambridgeMA02138 United States Dept. of Physics Massachusetts Institute of Technology CambridgeMA02139 United States Dept. of Physics Institute for Global Prominent Research Chiba University Chiba263-8522 Japan Department of Physics Loyola University Chicago ChicagoIL60660 United States Dept. of Physics and Astronomy University of Canterbury Private Bag 4800 Christchurch New Zealand Dept. of Physics University of Maryland College ParkMD20742 United States Dept. of Astronomy Ohio State University ColumbusOH43210 United States Dept. of Physics Center for Cosmology and Astro-Particle Physics Ohio State University ColumbusOH43210 United States Niels Bohr Institute University

The Wavelength-shifting optical Module (WOM) is a novel optical sensor that uses wavelength shifting and light guiding to substantially enhance the photosensitive area of Uv optical modules. It has been designed for the IceCube Upgrade, a seven-string extension of the IceCube detector planned for the 2022/2023 South Pole deployment season. The WOM consists of a hollow quartz cylinder coated in wavelength shifting paint which serves as detection area and has two photomultipliers (PMTs) attached to the end faces. The light-collecting tube increases the effective photocathode area of the PMTs without producing additional dark current, making it suitable for low-signal, low-noise applications. We report on the design and performance of the WOM with a focus on the 12 modules in production for deployment in the IceCube Upgrade. While the WOM will be deployed in IceCube, its design is applicable to any large-volume particle detector based on the detection of Cherenkov light. © Copyright owned by the author(s).

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Ka-band MMIC LNA design

Ka-band MMIC LNA Design

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2020 IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes for RF and THz Applications, IMWS-AMP 2020

作者： Qin, Gang Jing-Ping, Liu Zi-Ting, Li Hui-Jun, Lin School of Electronic and Optical Engineering Nanjing University of Science and Technology Nanjing China

ISBN: (纸本)9781728160641

In order to better adapt to the requirements of smaller noise and better performance in low-noise amplifiers in radio communications,this article simulates and designs a 35GHz broadband monolithic microwave integrated circuit (MMIC) low noise amplifier,by adopting InGaAs pseudo-crystal high electron mobility transistor (pHEMT) process model. The circuit uses a three-stage cascaded dual power supply structure. The front-stage amplifier circuit optimizes the noise figure while ensuring a good input and output standing wave ratio. The last two stages provide maximum gain matching, which guarantees the good noise figure, gain flatness and vSWR of the overall *** addition, the source negative feedback inductance and bias network circuit of each stage are optimized to achieve a broadband output and high gain under low noise. The simulation design shows that under the working conditions of gate and drain bias voltages of -0.5v and 3v, and current of 90mA respectively, the amplifier has a minimum noise figure of less than 2dB and a maximum gain of more than 20dB in the 25-45GHz band. At 35GHz, it has a minimum noise figure of 1.702dB, a maximum gain of 24.594dB, an input standing wave ratio of 2.236 and an output standing wave ratio of *** designed low-noise amplifier can be implemented in a broadband millimeter wave transceiver system. © 2020 IEEE.

关键词： Noise figure

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