scholarly journals Back-Side Electron-Bombarded Silicon pin-Strip

2019 ◽  
Vol 22 (5) ◽  
pp. 80-92
Author(s):  
Mikhail R. Ainbund ◽  
Denis E. Mironov ◽  
Andrey V. Pashuk ◽  
Vasily I. Zubkov ◽  
Alexander V. Solomonov ◽  
...  
Keyword(s):  
High Speed ◽  
Potential Distribution ◽  
Charge Carrier Concentration ◽  
Back Side ◽  
Ir Detector ◽  
Photoelectric Device ◽  
Pin Diodes ◽  
Near Surface ◽  
Light Pulses ◽  
Position Sensitive

Introduction. In recent decades, in the field of photoelectronics, special attention has been paid to the development of semiconductor matrix photodetectors. These detectors have become an effective alternative to existing television receiving systems. Among such devices, linear position-sensitive sensors are used in cases where the rapid registration of changes to the environment is required (for instance, high-speed locators for flying vehicles).Aim. To develop a strip of silicon pin-diodes as part of a hybrid IR-detector for effective registration of photoelectrons with time resolution less than 10 ns, as well as to model the key electro-physical characteristics of the strip.Materials and methods. In the device under development, the registration of photoelectrons is achieved by the presence of a near-surface field using p ++–p junction formed by diffusion of boron into the silicon with resistivity of 3 kΩ · cm. The pulling field is also formed in the space charge region between p ++ - and n ++ -regions. Diffusion of phosphorus was carried out to create the n ++ -region. Numerical calculations of potential distribution, concentration of free charge carriers and currents were carried out using software for 1D- and 2D-modelling (SimWin and TCAD Synopsys).Results. 2D-calculation of charge carrier concentration and potential distribution was performed. The study determined the minimum bias for the complete depletion of the i-layer, including that for longitudinal grooves of various depths. The strip was tested as part of a hybrid photoelectric device by irradiating light pulses from IR LED. When the voltage on the diodes was reached –270 V, the duration of the signal front on all channels was 5…9 ns.Conclusion. For use in IR-hybrid detectors, a strip of 12 silicon pin-diodes was developed with a sensitive element of 24 × 0.2 mm in dimension. The study of pulse characteristics showed that the necessary duration of the front signal on all channels was achieved without thinning thus satisfying the requirements for high-speed position-sensitive sensor of the infrared radiation.

A novel binarily detectable high-speed optical position-sensitive device (BPSD)

1992 ◽  
Vol 10 (3) ◽  
pp. 391-395 ◽  
Author(s):  
A.K. Dutta ◽  
H. Takahashi ◽  
Y. Hatanaka
Keyword(s):  
High Speed ◽  
Optical Position ◽  
Position Sensitive

scholarly journals About mathematical simulation of processes for high-speed loading of materials on Department of Physical Mechanics of St. Petersburg State University

2020 ◽  
Vol 65 (4) ◽  
pp. 699-713
Author(s):  
Victor A. Morozov ◽  
◽  
Vsevolod I. Bogatko ◽  
Andrey B. Yakovlev ◽  
◽  
...  
Keyword(s):  
Mathematical Simulation ◽  
High Speed ◽  
Surface Region ◽  
Pulse Method ◽  
Magnetic Pulse ◽  
State University ◽  
Natural Experiments ◽  
Near Surface ◽  
Metal Rings ◽  
Physical Mechanics

The researches of shock-wave processes in the constructional materials are actual, but carrying out of natural experiments is extremely inconvenient and expensive, and sometimes it is even impossible to replicate. Therefore basically all researches of these problems are reduced to various cases of simulation of processes for high-speed loading of materials in the laboratory circumstances. In the paper we consider following directions of mathematical simulation of processes for high-speed loading of materials that were made on department of physical mechanics of St. Petersburg State University: the simulation of shock-loaded media by using of dynamics of dislocations; the simulation of high-speed loading of media with the account of the relaxation phenomena in a near-surface region; the simulation of propagation of the short elastoplastic impulse in medium under the condition of influence of a weak magnetic field; the generation of mathematical models of deformation and destruction of thin metal rings by a magnetic-pulse method; the simulation of crack propagation during the short-term pulse loading.

scholarly journals Tracking Testing of Dynamic Errors for Linear Guideway Based on Position Sensitive Detector

2011 ◽  
Vol 2-3 ◽  
pp. 362-365
Author(s):  
Da Zhong Guo ◽  
Yuan Yuan Zou ◽  
Si Jun Zhu ◽  
Ming Yang Zhao
Keyword(s):  
Measurement Errors ◽  
High Speed ◽  
Two Dimensions ◽  
Position Sensitive Detector ◽  
Detection Accuracy ◽  
Sensitive Detector ◽  
Motion Stability ◽  
Measurement Results ◽  
Dynamic Errors ◽  
Position Sensitive

The dynamic precision of linear guideway is very important performance for mechatronic equipments. The dynamic errors for the linear guideway of machine tools can reduce machining precision. In according with the advantage of high-speed response, high detection accuracy and non-contact measurement, position sensitive detector (PSD) is widely used in industrial dynamic measurement. In this paper an approach for measuring the motion stability based on PSD is proposed. The measurement system based on PSD is designed and the measurement errors are analyzed. The measurement results show the approach can measure accurately the motion stability of guideway in two dimensions with features of high precision.

A High-Speed Signal Processor Using a Digital Divider for Position Sensitive Proportional Counters

1980 ◽  
Vol 24 ◽  
pp. 173-176
Author(s):  
S. Kobashi ◽  
K. Mochiki ◽  
K. Hasegawa ◽  
A. Sekiguchi ◽  
H. Hashizume ◽  
...  
Keyword(s):  
High Speed ◽  
Dead Time ◽  
Present System ◽  
X Ray Diffraction ◽  
Analog To Digital ◽  
X Ray ◽  
System A ◽  
Proportional Counters ◽  
Position Sensitive ◽  
A Charge

Most position sensitive proportional counters (PSPCs) currently used in X-ray diffraction experiments have a dead time longer than 5 μs. Though such PSPCs are useful in measuring weak diffraction diagrams, a faster counter is needed to detect strong X-ray diagrams produced with synchrotron radiation sources. The long dead time of PSPCs using a charge division position read-out is due to the slow analog division circuit plus analog-to-digital converter employed in the present system. A fast processor can be built utilising two high-speed ADCs to digitize voltage signals from the detector, followed by a digital divider to compute position of detected photons. The present paper describes the design of such a processor and some preliminary testings of its performances.

Back-side-illuminated high-speed Ge photodetector fabricated on Si substrate using thin SiGe buffer layers

2004 ◽  
Vol 85 (15) ◽  
pp. 3286-3288 ◽  
Author(s):  
Zhihong Huang ◽  
Jungwoo Oh ◽  
Joe C. Campbell
Keyword(s):  
High Speed ◽  
Buffer Layers ◽  
Back Side ◽  
Si Substrate

High Speed Contact Type Linear Sensor Array Using a-Si pin Diodes

1983 ◽  
Author(s):  
H. Yamamoto ◽  
T. Baji ◽  
H. Matsumaru ◽  
Y. Tanaka ◽  
K. Seki ◽  
...  
Keyword(s):  
High Speed ◽  
Sensor Array ◽  
Pin Diodes ◽  
Contact Type

The infrared measurement cascade: Connecting large scale meteorologically induced surface temperature perturbations to local spatial velocity structures

2020 ◽  
Author(s):  
Benjamin Schumacher ◽  
Marwan Katurji ◽  
Jiawei Zhang
Keyword(s):  
Boundary Layer ◽  
Velocity Field ◽  
Brightness Temperature ◽  
High Speed ◽  
Surface Brightness ◽  
Large Scale ◽  
Mean Velocity ◽  
Near Surface ◽  
Multi Scale ◽  
Infrared Cameras

<p>The evolution of micrometeorological measurements has been recently manifested by developments in methodological and analytical techniques using spatial surface brightness temperature captured by infrared cameras (Schumacher et al. 2019, Katurji and Zawar-Reza 2016). The Thermal Image Velocimetry (TIV) method can now produce accurate 2D advection-velocities using high speed (>20Hz) infrared imagery (Inagaki 2013, Schumacher 2019). However, to further develop TIV methods and achieve a novel micrometeorological measurement technique, all scales of motion within the boundary layer need to be captured.</p><p>Spatial observations of multi-frequency and multi-scale temperature perturbations are a result from the turbulent interaction of the overlying atmosphere and the surface. However, these surface signatures are connected to the larger scales of the atmospheric boundary layer (McNaughton 2002, Träumner 2015). When longer periods (a few hours to a few days) of spatial surface brightness temperatures are observed, the larger scale information needs to be accounted for to build a comprehensive understanding of surface-atmospheric spatial turbulent interactions. Additionally, the time-frequency decomposition of brightness temperature perturbations shows longer periods of 4-15 minutes superimposed over shorter periods of ~ 4–30 seconds. This suggests that that boundary layer dynamic scales (of longer periods) can influence brightness temperature perturbations on the local turbulent scale. An accurate TIV algorithm needs to account for all scales of motion when analysing the time-space variability of locally observed spatial brightness temperature patterns.</p><p>To analyse these propositions temporally high resolved geostationary satellite infrared data from the Himawari 8 satellite was compared to near-surface and high speed (20 Hz) measured air and brightness temperature using thermocouple measurements and infrared cameras. The satellite provides a temporal resolution of 10-minutes and a horizontal resolution of 2 by 2 km per pixel and therefore captures the atmospheric meso γ and micro α scale which signals are usually active for ~10 minutes to < 12 hours. Moreover, the Himawari 8 brightness temperature was used to create the near-surface mean velocity field using TIV. Afterwards, the velocity field was compared to the in-situ measured wind velocity over several days during January 2019.</p><p>The results show that the atmospheric forcing from the micro α scale to lower atmospheric scales has a major impact on the near-surface temperature over several minutes. A significant (p-value: 0.02) positive covariance between the Himawari 8 measurement and the local measured temperature 1.5 cm above the ground on a 10 minute average, specifically concerning cooling and heating patterns, has been found.</p><p>Further analysis demonstrates that the retrieved near-surface 2-D velocity field calculated from the Himawari 8 brightness temperature perturbations is correctly representing the mean velocity. This finding allows the classification of meso-scale atmospheric forcing and its direct connection to local scale turbulent 2-D velocity measurements. This extends the TIV algorithm by a multi-scale component which allows to address inter-scale boundary layer analysis from a new point of view. In respect to the current findings a new experiment will focus on the repeated induced local velocity patterns from large scale forcing which will be measured through the surface brightness temperature.</p>

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