Relevant bibliographies by topics / Echo spectrometer

Academic literature on the topic 'Echo spectrometer'

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Published: 30 May 2022
Last updated: 31 May 2022

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Journal articles on the topic "Echo spectrometer"

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Nikitenko, Yu V. "Grazing incidence spin-echo neutron spectrometer." Journal of Surface Investigation. X-ray, Synchrotron and Neutron Techniques 10, no. 1 (January 2016): 169–76. http://dx.doi.org/10.1134/s1027451016010274.

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Monkenbusch, M. "The Jüulich neutron spin echo spectrometer." Neutron News 8, no. 1 (January 1997): 25–27. http://dx.doi.org/10.1080/10448639708231960.

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Groitl, Felix, Thomas Keller, and Klaus Habicht. "Generalized resolution matrix for neutron spin-echo three-axis spectrometers." Journal of Applied Crystallography 51, no. 3 (May 29, 2018): 818–30. http://dx.doi.org/10.1107/s1600576718005307.

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This article describes the energy resolution of spin-echo three-axis spectrometers (SE-TASs) by a compact matrix formalism. SE-TASs allow one to measure the line widths of elementary excitations in crystals, such as phonons and magnons, with an energy resolution in the µeV range. The resolution matrices derived here generalize prior work: (i) the formalism works for all crystal structures; (ii) spectrometer detuning effects are included; these arise typically from inaccurate knowledge of the excitation energy and group velocity; (iii) components of the gradient vector of the dispersion surface dω/dq perpendicular to the scattering plane are properly treated; (iv) the curvature of the dispersion surface is easily calculated in reciprocal units; (v) the formalism permits analysis of spin-echo signals resulting from multiple excitation modes within the three-axis spectrometer resolution ellipsoid.
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Chaplot, S. L., R. Mittal, and P. Goel. "Neutron spin-echo spectrometer at BARC, Trombay." Applied Physics A: Materials Science & Processing 74 (December 1, 2002): s280—s282. http://dx.doi.org/10.1007/s003390201544.

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Zeyen, Claude, and Kazuhisa Kakurai. "Spin-echo three-axis spectrometer: A reality." Journal of Neutron Research 4, no. 1 (December 1, 1996): 241–50. http://dx.doi.org/10.1080/10238169608200090.

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Takeda, Takayoshi, Shigehiro Komura, Hideki Seto, Michihiro Nagai, Hideki Kobayashi, Eiji Yokoi, Tooru Ebisawa, et al. "Neutron spin-echo spectrometer at JRR-3M." Physica B: Condensed Matter 213-214 (August 1995): 863–65. http://dx.doi.org/10.1016/0921-4526(95)00305-s.

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Sarkissian, B. V. B. "The multidetector neutron spin echo spectrometer IN11B." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 273, no. 1 (December 1988): 185–202. http://dx.doi.org/10.1016/0168-9002(88)90814-5.

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GLAUSER, A. M., R. VAN BOEKEL, O. KRAUSE, TH HENNING, B. BENNEKE, J. BOUWMAN, P. E. CUBILLOS, et al. "CHARACTERIZING EXOPLANETS IN THE VISIBLE AND INFRARED: A SPECTROMETER CONCEPT FOR THE EChO SPACE MISSION." Journal of Astronomical Instrumentation 02, no. 01 (September 2013): 1350004. http://dx.doi.org/10.1142/s2251171713500049.

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Transit-spectroscopy of exoplanets is one of the key observational techniques used to characterize extrasolar planets and their atmospheres. The observational challenges of these measurements require dedicated instrumentation and only the space environment allows undisturbed access to earth-like atmospheric features such as water or carbon dioxide. Therefore, several exoplanet-specific space missions are currently being studied. One of them is EChO, the Exoplanet Characterization Observatory, which is part of ESA's Cosmic Vision 2015–2025 program, and which is one of four candidates for the M3 launch slot in 2024. In this paper we present the results of our assessment study of the EChO spectrometer, the only science instrument onboard this spacecraft. The instrument is a multi-channel all-reflective dispersive spectrometer, covering the wavelength range from 400 nm to 16μm simultaneously with a moderately low spectral resolution. We illustrate how the key technical challenge of the EChO mission — the high photometric stability — influences the choice of spectrometer concept and fundamentally drives the instrument design. First performance evaluations underline the suitability of the elaborated design solution for the needs of the EChO mission.
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Franz, C., O. Soltwedel, C. Fuchs, S. Säubert, F. Haslbeck, A. Wendl, J. K. Jochum, P. Böni, and C. Pfleiderer. "The longitudinal neutron resonant spin echo spectrometer RESEDA." Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 939 (September 2019): 22–29. http://dx.doi.org/10.1016/j.nima.2019.05.056.

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Ohl, M., M. Monkenbusch, and D. Richter. "Neutron spin-echo spectrometer development for spallation sources." Physica B: Condensed Matter 335, no. 1-4 (July 2003): 153–56. http://dx.doi.org/10.1016/s0921-4526(03)00228-x.

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Dissertations / Theses on the topic "Echo spectrometer"

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Лозінський, Владислав Валентинович. "Моделювання звукопровідної системи середнього вуха людини в Comsol." Master's thesis, КПІ ім. Ігоря Сікорського, 2020. https://ela.kpi.ua/handle/123456789/33851.

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Дослідження слухових властивостей слухової системи людини є актуальною проблемою сьогодення, адже здоровий слух це запорука нормального життя. Серед об’єктивних методів, таких як імпендасометрія, дослідження проводять з застосуванням пневмосистеми, що робить неможливим проведення процедури для немовлят. Саме тому запропоновано дослідження на основі ехо-спектрометру, який є вдосконаленим об’єктивного методу без використання пневмосистеми та з простою процедурою вимірювань і обробки для розширення вікової групи та покращенням точності результатів. При наявності великого спектру можливостей для діагностики слуху, майже нічого не відомо про акустичні характеристики звукопровідної системи людини, вже десятки років вчені займаються вивченням середнього вуха. Також широке застосування набуло використання протезів для реконструкції вуха при пошкодженнях його органів слуху. Проте сказати наскільки ці методи ефективні важко. Тому ця робота присвячена моделюванню звукопровідної системи, замінника, порівнянням цих моделей та оцінці ефективності запропонованого методу діагностики слуху. Основною задачею є отримання коефіцієнту проходження, який дасть змогу відповісти на питання як саме себе поводить звукопровідна система та наскільки протези є ефективними для реконструкції слуху.
The study of the auditory properties of the human auditory system is an urgent problem today, because healthy hearing is the key to a normal life. Among the objective methods, such as impedancemetry, research is performed using a pneumatic system, which makes it impossible to perform the procedure for infants. That is why the study is based on an echo spectrometer, which is an improved objective method without the use of a pneumatic system and with a simple measurement and processing procedure to expand the age group and improve the accuracy of the results. With a wide range of opportunities for the diagnosis of hearing, almost nothing is known about the acoustic characteristics of the human sound system, for decades, scientists have been studying the middle ear. The use of prostheses for the reconstruction of the ear in case of damage to its hearing organs has also become widely used. However, it is difficult to say how effective these methods are. Therefore, this work is devoted to modeling the sound conduction system, substitute, comparing these models and evaluating the effectiveness of the proposed method of hearing diagnosis. The main task is to obtain the transmittance, which will answer the question of how the sound system behaves and how effective prostheses are for the reconstruction of hearing.
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Motyčka, Lukáš. "Radiofrekvenční metoda detekce výbušnin a drog - NQR." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-219982.

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The thesis deals with RF spectroscopic methods, which are applicable for the detection of hazardous substances such as explosives or drugs. Particular attention is focused on promising method of nuclear quadrupole resonance. Abroad this method has recently been applied in the detection of energetic materials in hazardous locations. The cornerstone of the nuclear quadrupole resonance is to evaluate the interaction between electromagnetic radiation, in the range of medium to very short waves, and the researched substance. Observed parameter are the resonant frequencies of the substance. Spectral analysis of signal is used for their evaluation. Resonant frequencies are always typical for the crystalline structure, therefore every explosive or drug is clearly identifiable by this method.
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Barrere, Caroline. "Analyse de polymères synthétiques par résonance magnétique nucléaire et spectrométrie de masse." Thesis, Aix-Marseille 1, 2011. http://www.theses.fr/2011AIX10061/document.

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Ces travaux de thèse sont consacrés à l’étude, par RMN et spectrométrie de masse, de la caractérisation structurale et la quantification en mélange, de polymères synthétiques à architectures complexes. La caractérisation structurale de copolymères à blocs amphiphiles POE-b-PS a été abordée dans un premier temps par la mise au point d’une nouvelle stratégie, rapide et sans prétraitement, pour la détermination de la masse moyenne en masse par RMN PGSE. La problématique des groupements terminaux fragiles en MALDI-MS, particulièrement cruciale dans le cas de polymères fonctionnalisés par des nitroxydes, a également été traitée. Une approche multidisciplinaire impliquant la RMN, la spectrométrie de masse et la chimie théorique a conduit au développement d’une stratégie de dérivation du groupement terminal labile qui permet la production d’adduits moléculaires intacts MALDI. Par ailleurs, la nécessité de quantifier les impuretés issues de la synthèse de ces macromolécules a conduit au développement d’une stratégie originale, rapide et efficace, basée sur la RMN PGSE. Cette stratégie, qui s’appuie sur la détermination des temps de relaxation magnétique des signaux au cours des expériences, suivie de la renormalisation des intégrales, a notamment soulevé la difficulté de mesurer le temps de relaxation transversale dans le cas de systèmes de spins magnétiquement couplés. Une nouvelle séquence d’impulsions a donc été proposée pour permettre une mesure précise de ce temps de relaxation dans un système de deux spins couplés
This thesis work deals with two main analytical aspects of PEO-b-PS amphiphilic block copolymers, their structural characterization and their quantitation in mixture, using NMR and mass spectrometry. In a first part, a novel approach was developed for the determination of copolymer weight average molecular weight by PGSE NMR. The issue of MALDI mass analysis of PEO homopolymers functionalized with a labile nitroxide end-group for the purpose of nitroxide mediated polymerization of the PS block was also addressed. A multidisciplinary approach involving NMR, mass spectrometry and theoretical calculation gave rise to an efficient derivatization strategy aimed at allowing intact PEO adducts to be generated by MALDI. In addition, requirement for impurity quantitation in polymer samples led to the development of a rapid and accurate method using PGSE NMR. This approach, based on the measurement of magnetic relaxation times during PGSE experiments to enable signal intensity renormalization, evidenced the issue of transverse relaxation time estimation in the case of coupled spin systems. A novel NMR pulse sequence was hence proposed and successfully applied for accurate measurement of transverse relaxation times in a model case of a two-spin coupled system
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Book chapters on the topic "Echo spectrometer"

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Chaplot, S. L., R. Mittal, and K. N. Prabhatasree. "Neutron Spin Echo Spectrometer at B.A.R.C. Trombay." In Neutron Spin Echo Spectroscopy, 48–55. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-45823-9_5.

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Pappas, C., A. Triolo, F. Mezei, R. Kischnik, and G. Kali. "Wide Angle Neutron Spin Echo and Time-of-Flight Spectrometer." In Neutron Spin Echo Spectroscopy, 35–47. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-45823-9_4.

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Keller, T., B. Keimer, K. Habicht, R. Golub, and F. Mezei. "Neutron Resonance Spin Echo — Triple Axis Spectrometry (NRSE-TAS)." In Neutron Spin Echo Spectroscopy, 74–86. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-45823-9_8.

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Monkenbusch, M. "Neutron Spin Echo Spectrometers of the Next Generation — Where Are the Limits?" In Neutron Spin Echo Spectroscopy, 201–12. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/3-540-45823-9_16.

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Yan, Xiaolei, Bin Du, Juan Lu, and Wenkun Zhang. "Study on the Effects of Sorbitol on Water Holding Capacity of Meat by NMR." In Advances in Transdisciplinary Engineering. IOS Press, 2021. http://dx.doi.org/10.3233/atde210315.

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The distribution and changes of constitutional water, immobilized water and free water and the effects of the sorbitol on three kinds of water during the curing of fresh meat were studied in this paper. The low-field Nuclear Magnetic Resonance were used to measure water and its distribution in meat. The test parameters are as follows: magnetic field strength of the NMR spectrometer is 0.5Tesla, corresponding resonance frequency for protons is 22MHz, sampling points is 160128, repeated scanning number is 16, repetition time is 1.6s, echo time is 1.6s. The results showed that: the relaxation time T2 can be divided into three parts: T21 (0∼10ms), T22 (10∼100ms), T23 (100∼1000ms). And the area of T21, T22, T23 represents the contents of constitutional water, immobilized water and free water. The addition of sorbitol can keep water during curing. The sorbitol can reduce the activity of the immobilized water and free water during curing of the fresh meat.
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Wei, S., and A. W. ,. Jr Castleman. "Reaction Dynamics in Femtosecond and Microsecond Time Windows: Ammonia Clusters as a Paradigm." In Chemical Reactions in Clusters. Oxford University Press, 1996. http://dx.doi.org/10.1093/oso/9780195090048.003.0009.

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The last decade has seen tremendous growth in the study of gas phase clusters. Some areas of cluster research which have received considerable attention in this regard include solvation (Lee et al. 1980), (Armirav et al. 1982), and reactivity (Dantus et al. 1991; Khudkar and Zewail 1990; Rosker et al. 1988; Scherer et al. 1987). In particular, studies of the dynamics of formation and dissociation, and the changing properties of clusters at successively higher degrees of aggregation, enable an investigation of the basic mechanisms of nucleation and the continuous transformation of matter from the gas phase to the condensed phase to be probed at the molecular level (Castleman and Keesee 1986a, 1988). In this context, the progressive clustering of a molecule involves energy transfer and redistribution within the molecular system, with attendant processes of unimolecular dissociation taking place between growth steps (Kay and Castleman 1983). Related processes of energy transfer, proton transfer, and dissociation are also operative during the reorientation of molecules about ions produced during the primary ionization event required in detecting clusters via mass spectrometry (Castleman and Keesee 1986b), providing further motivation for studies of the reaction dynamics of clusters (Begemann et al. 1986; Boesl et al 1992; Castleman and Keesee 1987; Echt et al. 1985; Levine and Bernstein 1987; Lifshitz et al. 1990; Lifshitz and Louage 1989, 1990; Märk 1987; Märk and Castleman 1984, 1986; Morgan and Castleman 1989; Stace and Moore 1983; Wei et al. 1990a,b). The real-time probing of cluster reaction dynamics is a facilitating research field through femtosecond pump-probe techniques pioneered by Zewail and coworkers (Dantus et al. 1991; Khundkar and Zewail 1990; Rosker et al. 1988; Scherer et al. 1987). Some real-time investigations have been performed on metal, van der Waals, and hydrogen-bonded clusters by employing these pump-probe spectroscopic techniques. For example, the photoionization and fragmentation of sodium clusters have been investigated by ion mass spectrometry and zero kinetic energy photoelectron spectroscopy in both picosecond (Schreiber et al. 1992) and femtosecond (Baumert et al. 1992, 1993; Bühler et al. 1992) time domains. Studies have also been made to elucidate the effect of solvation on intracluster reactions.
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Conference papers on the topic "Echo spectrometer"

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Krause, O., A. M. Glauser, R. van Boekel, M. Güdel, T. Henning, M. R. Meyer, D. M. Stam, et al. "Visible/infrared spectrometer for EChO." In SPIE Astronomical Telescopes + Instrumentation, edited by Mark C. Clampin, Giovanni G. Fazio, Howard A. MacEwen, and Jacobus M. Oschmann. SPIE, 2012. http://dx.doi.org/10.1117/12.927157.

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Bikbov, Ildus S., Ivan I. Popov, and Andrey M. Gladyshev. "Optical echo-spectrometer for detection of quantum transition branch type." In PECS'2001: Photon Echo and Coherent Spectroscopy, edited by Vitaly V. Samartsev. SPIE, 2001. http://dx.doi.org/10.1117/12.447994.

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Adriani, Alberto, Ernesto Oliva, Giuseppe Piccioni, Emanuele Pace, Mauro Focardi, Canio Di Turi, Gianrico Filacchione, et al. "The visible and near infrared (VNIR) spectrometer of EChO." In SPIE Astronomical Telescopes + Instrumentation, edited by Mark C. Clampin, Giovanni G. Fazio, Howard A. MacEwen, and Jacobus M. Oschmann. SPIE, 2012. http://dx.doi.org/10.1117/12.926103.

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Bellucci, G., A. Adriani, L. Gambicorti, M. Focardi, E. Oliva, M. Farina, A. M. Di Giorgio, et al. "An improved version of the Visible and Near Infrared (VNIR) spectrometer of EChO." In SPIE Astronomical Telescopes + Instrumentation, edited by Jacobus M. Oschmann, Mark Clampin, Giovanni G. Fazio, and Howard A. MacEwen. SPIE, 2014. http://dx.doi.org/10.1117/12.2055107.

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Copley, John R. D., Carmel Hayes, and Colette Lartigue. "Performance comparisons for the ILL neutron spin echo spectrometer IN15 in its standard and focusing mirror configurations." In SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, edited by Carolyn A. MacDonald, Kenneth A. Goldberg, Juan R. Maldonado, Huaiyu H. Chen-Mayer, and Stephen P. Vernon. SPIE, 1999. http://dx.doi.org/10.1117/12.371127.

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Yevseyev, Igor V. "Polarization photon echo spectroscopy." In High Performance Optical Spectrometry, edited by Maksymilian Pluta, Aleksandra Kopystynska, and Mariusz Szyjer. SPIE, 1993. http://dx.doi.org/10.1117/12.155678.

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Ortega Clavero, Valentin, Werner Schröder, Patrick Meyrueis, and Andreas Weber. "Robust, precise, high-resolution Fourier transform Raman spectrometer." In SPIE Eco-Photonics, edited by Pierre Ambs, Dan Curticapean, Claus Emmelmann, Wolfgang Knapp, Zbigniew T. Kuznicki, and Patrick P. Meyrueis. SPIE, 2011. http://dx.doi.org/10.1117/12.882898.

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Boucher, Daniel, Sergey V. Chekalin, S. A. Kovalenko, Juru A. Matveets, P. Masselin, M. G. Novikov, V. V. Ragulsky, and Andrei G. Stepanov. "Ultrafast relaxation of fullerenes and fullerites by broadband femtosecond laser spectrometry." In PECS '97: Photon Echo and Coherent Spectroscopy, edited by Vitaly V. Samartsev. SPIE, 1997. http://dx.doi.org/10.1117/12.287696.

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Privitera, G., S. Tudisco, L. Lanzanò, F. Musumeci, S. Privitera, A. Scordino, D. Tudisco, M. Mazzillo, and G. Condorelli. "Single photon spectrometer for biomedical application: new developments." In European Conference on Biomedical Optics. Washington, D.C.: OSA, 2007. http://dx.doi.org/10.1364/ecbo.2007.6628_51.

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Tudisco, Salvatore. "A Single Photon Spectrometer for Biomedical Application." In European Conference on Biomedical Optics. Washington, D.C.: OSA, 2005. http://dx.doi.org/10.1364/ecbo.2005.wg5.

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Reports on the topic "Echo spectrometer"

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Fayer, Michael D. Enhanced Vibrational Echo Correlation Spectrometer for the Study of Molecular Dynamics, Structures, and Analytical Applications. Fort Belvoir, VA: Defense Technical Information Center, September 2006. http://dx.doi.org/10.21236/ada463590.

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