Готові списки джерел за темами / Nanosecond precision

Добірка наукової літератури з теми "Nanosecond precision"

Автор: Grafiati

Опубліковано: 10 грудня 2022

Оновлено: 28 січня 2023

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Статті в журналах з теми "Nanosecond precision"

Ye, Y., H. Li, J. Li, and G. Gong. "Sub-nanosecond synchronization implementation in pure Xilinx Kintex-7 FPGA." Journal of Instrumentation 16, no. 11 (November 1, 2021): P11036. http://dx.doi.org/10.1088/1748-0221/16/11/p11036.

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Abstract White Rabbit (WR) provides high-performance synchronization with sub-nanosecond accuracy and picoseconds precision, and it has been included in the new High Accuracy Default PTP Profile in the IEEE 1588-2019. As an open-source project, WR Precision Time Protocol (WR-PTP) core has been implemented in different FPGA platforms with dedicated clock circuits. This paper presents a novel approach to achieve the WR function in Xilinx Kintex-7 FPGA depending on the on-chip resource. This approach could achieve sub-nanosecond accuracy and tens of picoseconds precision, simplifying WR devices' hardware design and making it possible to port the WR PTP core to many mature hardware platforms.

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Eyler, E. E., A. Yiannopoulou, S. Gangopadhyay, and N. Melikechi. "Chirp-free nanosecond laser amplifier for precision spectroscopy." Optics Letters 22, no. 1 (January 1, 1997): 49. http://dx.doi.org/10.1364/ol.22.000049.

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Hare, B. M., O. Scholten, A. Bonardi, S. Buitink, A. Corstanje, U. Ebert, H. Falcke, et al. "LOFAR Lightning Imaging: Mapping Lightning With Nanosecond Precision." Journal of Geophysical Research: Atmospheres 123, no. 5 (March 16, 2018): 2861–76. http://dx.doi.org/10.1002/2017jd028132.

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Sun, Yanwen, Franz-Josef Decker, James Turner, Sanghoon Song, Aymeric Robert, and Diling Zhu. "Pulse intensity characterization of the LCLS nanosecond double-bunch mode of operation." Journal of Synchrotron Radiation 25, no. 3 (March 27, 2018): 642–49. http://dx.doi.org/10.1107/s160057751800348x.

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The recent demonstration of the `nanosecond double-bunch' operation mode,i.e.two X-ray pulses separated in time between 0.35 and hundreds of nanoseconds and by increments of 0.35 ns, offers new opportunities to investigate ultrafast dynamics in diverse systems of interest. However, in order to reach its full potential, this mode of operation requires the precise characterization of the intensity of each X-ray pulse within each pulse pair for any time separation. Here, a transmissive single-shot diagnostic that achieves this goal for time separations larger than 0.7 ns with a precision better than 5% is presented. It also provides real-time monitoring feedback to help tune the accelerator parameters to deliver double pulse intensity distributions optimized for specific experimental goals.

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Liu, Ying, Wenhai Jiao, Longxia Xu, and Xiaohui Li. "Differential Timing Method Based on Modified Traceability Model." Journal of Navigation 73, no. 6 (June 22, 2020): 1326–39. http://dx.doi.org/10.1017/s0373463320000314.

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The common view time transfer and two-way time and frequency transfer methods are currently the main means for achieving time synchronisation at nanosecond level. However, these methods have some limitations in real time and cost, which limit their wide applications in many fields, such as time synchronisation among base stations of the upcoming 5G network. In order to meet the requirements of nanosecond time synchronisation, a low-cost differential timing method is proposed in this paper by changing the manner of generation of traceability model parameters in GNSS navigation messages. The time deviation between GNSS system time and the timing laboratory that maintains Coordinated Universal Time (UTC) kept by timing laboratory named k (UTC(k)) is monitored by receiving the GNSS signal in space with monitoring receivers. The new traceability model parameters are generated with the monitored time deviations and then broadcast to users through the GNSS navigation message. The precision of the one-way timing method can be improved from tens of nanoseconds to the order of several nanoseconds with the proposed method. In addition, there are obvious advantages to carry out this method on the geostationary satellites in the BeiDou navigation satellite (BDS) constellation. The proposed method is verified on an experimental platform based on the UTC(NTSC) time frequency signal and the geostationary satellites in the BDS-3 constellation.

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Zhang, Xing Hong, Wei Cai, Feng Yun Xiang, Tian Heng Zhang, and Shu Xiang Liu. "A Novel Precision Ultrasonic Thermometer." Advanced Materials Research 328-330 (September 2011): 1768–71. http://dx.doi.org/10.4028/www.scientific.net/amr.328-330.1768.

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A new type of temperature measurement apparatus is designed by utilizing the characteristic that the velocity of the ultrasonic wave varies with the temperature through the medium, with both merits low cost and high precision. This paper introduces the principle of ultrasonic thermometer and puts forward the realization of hardware and software of thermometer, and details the special software subdivision algorithm which is used to measure the ultrasonic transmission time accurately. The experimental results indicate that the thermometer achieves the measure of the ultrasonic wave transmitting time with nanosecond level. The key problems are solved in the practical application of the ultrasonic temperature measuring technology, and the resolution of the temperature measurement is better than 0.001 centigrade.

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Shi Huicai, 石会财, 曹劭文 Cao Shaowen, 张蓉竹 Zhang Rongzhu, and 孙年春 Sun Nianchun. "Effect of nanosecond pulse control precision on multi-beam beams." Infrared and Laser Engineering 46, no. 12 (2017): 1206003. http://dx.doi.org/10.3788/irla201746.1206003.

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Yang, Kai, William Paul, Soo-Hyon Phark, Philip Willke, Yujeong Bae, Taeyoung Choi, Taner Esat, Arzhang Ardavan, Andreas J. Heinrich, and Christopher P. Lutz. "Coherent spin manipulation of individual atoms on a surface." Science 366, no. 6464 (October 24, 2019): 509–12. http://dx.doi.org/10.1126/science.aay6779.

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Achieving time-domain control of quantum states with atomic-scale spatial resolution in nanostructures is a long-term goal in quantum nanoscience and spintronics. Here, we demonstrate coherent spin rotations of individual atoms on a surface at the nanosecond time scale, using an all-electric scheme in a scanning tunneling microscope (STM). By modulating the atomically confined magnetic interaction between the STM tip and surface atoms, we drive quantum Rabi oscillations between spin-up and spin-down states in as little as ~20 nanoseconds. Ramsey fringes and spin echo signals allow us to understand and improve quantum coherence. We further demonstrate coherent operations on engineered atomic dimers. The coherent control of spins arranged with atomic precision provides a solid-state platform for quantum-state engineering and simulation of many-body systems.

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Liu, Yong, Yong Jiang, Chunsheng Guo, Shihui Deng, and Huanghai Kong. "Experimental Research on Machining Localization and Surface Quality in Micro Electrochemical Milling of Nickel-Based Superalloy." Micromachines 9, no. 8 (August 14, 2018): 402. http://dx.doi.org/10.3390/mi9080402.

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Micro electrochemical machining is becoming increasingly important in the microfabrication of metal parts. In this paper, the machining characteristics of micro electrochemical milling with nanosecond pulse were studied. Firstly, a mathematical model for the localization control of micro electrochemical milling with nanosecond pulse was established. Secondly, groups of experiments were conducted on nickel-based superalloy and the effects of parameters such as applied voltage, pulse on time, pulse period, electrolyte concentration and electrode diameter on machining localization and surface roughness were analyzed. Finally, by using the optimized machining parameters, some 2D complex shapes and 3D square cavity structures with good shape precision and good surface quality were successfully obtained. It was proved that the micro electrochemical milling with nanosecond pulse technique is an effective machining method to fabricate metal microstructures.

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Zemann, Richard, Friedrich Bleicher, and Reinhard Zisser-Pfeifer. "Electrochemical micromachining with ultra short voltage pulses." Archive of Mechanical Engineering 59, no. 3 (October 1, 2012): 313–27. http://dx.doi.org/10.2478/v10180-012-0016-z.

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The machining technology of electrochemical micromachining with ultra short voltage pulses (μPECM) is based on the already well-established fundamentals of common electrochemical manufacturing technologies. The enormous advantage of the highest manufacturing precision underlies the fact of the extremely small working gaps achievable through ultra short voltage pulses in nanosecond duration. This describes the main difference with common electrochemical technologies. With the theoretical resolution of 10 nm, this technology enables high precision manufacturing [4].

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Більше джерел

Дисертації з теми "Nanosecond precision"

Wang, Xinrui. "Indoor environments robot localization by employing 802.11 wireless network one way propagation time measurements." Thesis, 2010. http://hdl.handle.net/2440/64115.

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Indoor service robots have been under research and development for decades, but still can not be widely applied. Lack of autonomy is one of the critical factors which limit the application of indoor service robots. Unlike industry production line robots, indoor service robots require highly accurate localization ability for navigation and automation. Commonly used GPS localization algorithms can not be applied in indoor environments, because the indoor satellite signals are too weak for localization. Different technologies have been employed to provide robots with indoor localization abilities. Infrared sensors, Radio Frequency ID (RFID), ultrasonic sensors, laser range finders and visual cameras all have been successfully developed to provide indoor localization solutions. Except the concerns like measurements’ accuracy, size, cost to deploy, most of these localization solutions can only locate robots relevant to indoor objects, for instance walls, doors and cabinets. The localization information lacks a reference to the whole building or at least the floor where robots are working. This thesis aims to develop an indoor localization system which can provide cheap, easy to access, reliable, accurate localization information with the reference to the whole floorplan. With the development of Wireless Local Area Network (WLAN), many researchers have developed the indoor localization systems based on WLAN. Angle of Arrival (AOA), Received Signal Strength (RSS) and Time of Arrival (TOA) are three commonly used WLAN indoor localization technologies. With the consideration of accuracy and difficulty to apply among different WLAN localization methods, One Way Propagation Time (OWPT), which is a sub-category of TOA, was developed to an accurate and low cost indoor localization system. In all the reviewed literatures, no research was found which aimed to develop an OWPT localization system for WLAN. The OWPT measurement algorithms in this thesis provide a potential for achieving sub-meter indoor localization accuracy, which is more precise than most other localization methods. Based on OWPT localization algorithms, a WLAN OWPT indoor localization system is presented at the end of the thesis which can continuously provide robots with accurate and robust localization information in indoor environments. The developed OWPT algorithms contain two parts: one is Synchronization between Access Points (AP) and Mobile Station (MS); another is OWPT Measurement Precision Improvement. According to 802.11 protocols, every AP in a WLAN transmits beacon frames periodically. A beacon frame contains its transfer time from an AP and that AP’s identification: Basic Service Set ID (BSSID). A MS can record the beacon frame’s arrival time. The beacon frame’s OWPT is calculated from these two recorded times. There are two challenges in the application of OWPT measurements in a WLAN. Firstly, the AP clock and the MS clock need to be highly synchronized before calculating OWPT. Secondly, an ordinary 802.11 WLAN APs’ time precision is 1 microsecond (μs) which corresponds to 30 meters (m) localization precision. The proposed OWPT algorithms utilize μs precision transfer times and nanosecond (ns) precision arrival times to synchronize the MS and AP clocks and measure a beacon frame’s OWPT with ns precision. A One-AP-One-MS simulation model was built to simulate transmission of beacon frames from an AP to a MS. The viability of the proposed OWPT algorithms was verified in the simulation model. Simulation results indicated that the proposed algorithms could refine WLAN OWPT measurements to meet the ns precision required. When the proposed algorithms were further verified in experiments, hardware limitations were exposed. Due to the lack of highly accurate onboard timers, the ordinary wireless adapter wireless adapters could not record beacon frame arrival times with ns precision. To test the proposed algorithms experimentally, an software timer and oscilloscope were employed to record beacon frames arrival time with ns precision respectively. Test results are detailed and analysed in the thesis. The presented OWPT measurement algorithms will not only benefit indoor service robots, but also provide a low cost indoor localization solution for other indoor services which based on locations, for example warehouse arrangement, customer information access, entertainment etc. Further research is needed to improve hardware timers’ precision on either wireless adapters or computers to record beacon frame arrival time with ns precision. The combination of a ns precision hardware clock and the proposed OWPT measurement algorithms will allow effective implementation of high precision OWPT measurement in WLAN for indoor localization.
Thesis (M.Eng.Sc.) -- University of Adelaide, School of Mechanical Engineering, 2010

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Частини книг з теми "Nanosecond precision"

Zhang, Heng, Yun Zhou, and Lin Sen Chen. "Fabrication of Micro-Grating Structure on Glazed Stainless-Steel by Two-Beam Holographic Method Using Nanosecond Laser Pulses." In Optics Design and Precision Manufacturing Technologies, 1133–37. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-458-8.1133.

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Williams, Jim. "30 nanosecond settling time measurement for a precision wideband amplifier." In Analog Circuit Design, 577–606. Elsevier, 2013. http://dx.doi.org/10.1016/b978-0-12-397888-2.00024-9.

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Qin, Weijin, Ya Liu, and Xuhai Yang. "Performance Analysis on a Traceable Precise Satellite Timing." In Advances in Transdisciplinary Engineering. IOS Press, 2022. http://dx.doi.org/10.3233/atde221204.

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Polluted by the noise of the observation, precision of satellite timing based on pseudoranges can merely reach tens of nanoseconds. Considering the sharply increasing demand of high-precision timing in the many fields, a traceable precise timing system has been proposed, which means having a connection with UTC (Coordinated Universal Time). We introduce the principle of the PPP (Precise Point Positioning) timing system and conduct the experiment with the form of zero baseline, long baseline, and very long baseline, simultaneously, CV (Common View) and AV (All in View) timing solution are used for comparison. Finally, the system performance has been evaluated from the aspects of precision and stability. The results show, when the Rubidium module is the frequency source of the user terminal, the 1 PPS timing accuracy of 904 km achieved by this method is 0.32 ns, and the frequency stability can achieve about 9.51e-13, 5.58e-13 and 1.37e-13 at the averaging time of 100 s, 1000 s and 10000 s. The timing bias is approximate 2 ns. Besides, the variation of the temperature will affect the timing results. Compared to the pseudorange timing solution, improvement on the PPP short term stability is more obvious than that of long term stability.

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Тези доповідей конференцій з теми "Nanosecond precision"

Knowles, M. R. H., G. Rutterford, A. I. Bell, A. J. Andrews, G. Foster-Turner, A. J. Kearsley, D. W. Coutis, D. Kapitan, and C. E. Webb. "Precision micro-machining with nanosecond lasers." In Conference on Lasers and Electro-Optics (CLEO 2000). Technical Digest. Postconference Edition. TOPS Vol.39. IEEE, 2000. http://dx.doi.org/10.1109/cleo.2000.907419.

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Leonardo, Manuel J., Mark W. Byer, Gregory L. Keaton, Derek J. Richard, Frank J. Adams, Kiyomi Monro, John L. Nightingale, Susi Guzsella, and Laura A. Smoliar. "Versatile, nanosecond laser source for precision material processing." In ICALEO® 2009: 28th International Congress on Laser Materials Processing, Laser Microprocessing and Nanomanufacturing. Laser Institute of America, 2009. http://dx.doi.org/10.2351/1.5061656.

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Bosman, Johan, Henk Kettelarij, and Corne J. G. M. de Kok. "Nanosecond laser micro machining using an external beam attenuator." In Fourth International Symposium on laser Precision Microfabrication, edited by Isamu Miyamoto, Andreas Ostendorf, Koji Sugioka, and Henry Helvajian. SPIE, 2003. http://dx.doi.org/10.1117/12.540504.

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Ozkan, Arzu, Leonard R. Migliore, Corey M. Dunsky, and Michael W. Phaneuf. "Glass processing using microsecond, nanosecond and femtosecond pulsed lasers." In Fourth International Symposium on laser Precision Microfabrication, edited by Isamu Miyamoto, Andreas Ostendorf, Koji Sugioka, and Henry Helvajian. SPIE, 2003. http://dx.doi.org/10.1117/12.540701.

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Arnold, Nikita, G. Schrems, T. Muehlberger, M. Bertsch, Mario Mosbacher, Paul Leiderer, and Dieter Baeuerle. "Dynamic particle removal by nanosecond dry laser cleaning: theory." In Second International Symposium on Laser Precision Micromachining, edited by Isamu Miyamoto, Yong Feng Lu, Koji Sugioka, and Jan J. Dubowski. SPIE, 2002. http://dx.doi.org/10.1117/12.456828.

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Moreira, Naiara, Jesus Lazaro, Armando Astarloa, Alain Garcia, and Sergio Salas. "Nanosecond accuracy using SoC platforms." In 2014 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control, and Communication (ISPCS). IEEE, 2014. http://dx.doi.org/10.1109/ispcs.2014.6948524.

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Agullo, Ivan, Anthony J. Brady, Stav Haldar, Antía Lamas-Linares, W. Cyrus Proctor, and James E. Troupe. "Global Precision Time Distribution via Satellite-Based Entangled Photon Sources." In Quantum 2.0. Washington, D.C.: Optica Publishing Group, 2022. http://dx.doi.org/10.1364/quantum.2022.qth3a.3.

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High-precision time synchronization is a fundamental requirement for quantum networks. We simulate a global time distribution network by using quantum clock synchronization – sharing entangled photons between satellite-ground station pairs. This provides sub-nanosecond to picosecond level precision over intercontinental scales (better than GPS).

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Hao, Liu, Yinming Zhang, and Yunxiao Na. "Research on amplification and peak-holding circuits of nanosecond light pulse." In Sixth International Symposium on Precision Mechanical Measurements, edited by Shenghua Ye and Yetai Fei. SPIE, 2013. http://dx.doi.org/10.1117/12.2035894.

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Knowles, M. R. H., G. Rutterford, A. I. Bell, A. J. Andrews, G. Foster-Turner, A. J. Kearsley, D. W. Coutts, D. Kapitan, and C. E. Webb. "Sub-micron and high precision micro-machining using nanosecond lasers." In ICALEO® ‘98: Proceedings of the Laser Materials Processing Conference. Laser Institute of America, 1998. http://dx.doi.org/10.2351/1.5059138.

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Braun, M., M. Juranek, A. Széll, P. Szántó, and C. Marin. "1.2 - Nanosecond Synchronous Analog Data Acquisition over Precision Time Protocol." In etc2016 - 36. European Telemetry and Test Conference. AMA Service GmbH, Von-Münchhausen-Str. 49, 31515 Wunstorf, Germany, 2016. http://dx.doi.org/10.5162/etc2016/1.2.

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