Littérature scientifique sur le sujet « GAMMA-400 »
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Articles de revues sur le sujet "GAMMA-400"
Galper, A. M., N. P. Topchiev et Yu T. Yurkin. « GAMMA-400 Project ». Astronomy Reports 62, no 12 (décembre 2018) : 882–89. http://dx.doi.org/10.1134/s1063772918120223.
Texte intégralTopchiev, N. P., A. M. Galper, V. Bonvicini, O. Adriani, R. L. Aptekar, I. V. Arkhangelskaja, A. I. Arkhangelskiy et al. « The GAMMA-400 gamma-ray telescope for precision gamma-ray emission investigations ». Journal of Physics : Conference Series 675, no 3 (5 février 2016) : 032009. http://dx.doi.org/10.1088/1742-6596/675/3/032009.
Texte intégralArkhangelskiy, A. I., I. V. Arkhangelskaja, M. D. Kheymits, M. F. Runtso, S. I. Suchkov, N. P. Topchiev et Yu T. Yurkin. « The Prototype of GAMMA-400 Apparatus ». Physics Procedia 74 (2015) : 191–98. http://dx.doi.org/10.1016/j.phpro.2015.09.187.
Texte intégralGalper, A. M., O. Adriani, R. L. Aptekar, I. V. Arkhangelskaja, A. I. Arkhangelskiy, M. Boezio, V. Bonvicini et al. « Status of the GAMMA-400 project ». Advances in Space Research 51, no 2 (janvier 2013) : 297–300. http://dx.doi.org/10.1016/j.asr.2012.01.019.
Texte intégralTopchiev, N. P., A. M. Galper, I. V. Arkhangelskaja, A. I. Arkhangelskiy, A. V. Bakaldin, I. V. Chernysheva, O. D. Dalkarov et al. « High-energy gamma- and cosmic-ray observations with future space-based GAMMA-400 gamma-ray telescope ». EPJ Web of Conferences 208 (2019) : 14004. http://dx.doi.org/10.1051/epjconf/201920814004.
Texte intégralEgorov, Andrey E., Nikolay P. Topchiev, Arkadiy M. Galper, Oleg D. Dalkarov, Alexey A. Leonov, Sergey I. Suchkov et Yuriy T. Yurkin. « Dark matter searches by the planned gamma-ray telescope GAMMA-400 ». Journal of Cosmology and Astroparticle Physics 2020, no 11 (24 novembre 2020) : 049. http://dx.doi.org/10.1088/1475-7516/2020/11/049.
Texte intégralMikhailova, A. V., A. V. Bakaldin, I. V. Chernysheva, A. M. Galper, M. D. Kheymits, A. A. Leonov, A. G. Mayorov et al. « Capabilities of the GAMMA-400 gamma-ray telescope for lateral aperture ». Journal of Physics : Conference Series 1690 (décembre 2020) : 012026. http://dx.doi.org/10.1088/1742-6596/1690/1/012026.
Texte intégralTopchiev, N. P., A. M. Galper, V. Bonvicini, O. Adriani, I. V. Arkhangelskaja, A. I. Arkhangelskiy, A. V. Bakaldin et al. « High-energy gamma-ray studying with GAMMA-400 after Fermi-LAT ». Journal of Physics : Conference Series 798 (janvier 2017) : 012011. http://dx.doi.org/10.1088/1742-6596/798/1/012011.
Texte intégralChasovikov, E. N., I. V. Arkhangelskaja, A. A. Perfil‘ev, A. I. Arkhangelskiy, A. M. Galper, N. P. Topchiev, Yu V. Gusakov, M. D. Kheymits et Yu T. Yurkin. « GAMMA-400 Space Gamma-telescope Mathematical Model with Engineering Elements Included ». Physics Procedia 74 (2015) : 206–11. http://dx.doi.org/10.1016/j.phpro.2015.09.198.
Texte intégralTopchiev, N. P., A. M. Galper, V. Bonvicini, O. Adriani, R. L. Aptekar, I. V. Arkhangelskaja, A. I. Arkhangelskiy et al. « The GAMMA-400 experiment : Status and prospects ». Bulletin of the Russian Academy of Sciences : Physics 79, no 3 (mars 2015) : 417–20. http://dx.doi.org/10.3103/s1062873815030429.
Texte intégralThèses sur le sujet "GAMMA-400"
Cumani, Paolo. « Analysis and estimation of the scientific performance of the GAMMA-400 experiment ». Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/10888.
Texte intégralPer uno studio completo che parte dalla materia oscura e va all'origine e propagazione dei raggi cosmici, quello multi canale è uno degli approcci migliori per risolvere i quesiti irrisolti della fisica delle astroparticelle. GAMMA-400, grazie alla sua natura duale, dedita allo studio di raggi cosmici (elettroni fino alle energie del TeV e protoni e nuclei fino a 10^{15}-10^{16} eV) e raggi gamma (da 50 MeV fino a qualche TeV), si dedicherà allo studio di questi problemi. Lo scopo di questa tesi è lo studio delle prestazioni di GAMMA-400 per l'osservazione dei raggi gamma. Due diverse configurazioni della geometria sono state studiate: la "baseline" e la cosiddetta configurazione "enhanced". Le principali differenze tra queste due configurazioni si trovano nel tracciatore e nel calorimetro. Il tracciatore della "baseline" è composto da dieci piani di silicio, otto dei quali comprendono anche uno strato di ~0.1 X_0 di tungsteno. Il tracciatore della configurazione "enhanced" è invece composto da 25 piani di silicio inframezzati da uno strato di tungsteno di ~0.03 X_0. Il calorimetro della "baseline" è diviso in due sezioni: una parte composta da due piani di ioduro di cesio e silicio (chiamata "pre-shower") e una seconda parte composta da 28x28x12 cubi di ioduro di cesio. Il calorimetro della configurazione "enhanced" è invece composto solo da 20x20x20 cubi di ioduro di cesio. Per stimare le prestazioni ho sviluppato un algoritmo di ricostruzione della direzione del raggio gamma incidente. La ricostruzione può fare uso delle informazioni provenienti dal tracciatore, dal "pre-shower" o dal calorimetro, sia combinandole che singolarmente. Le direzioni ottenuta grazie alle informazioni del solo "pre-shower" o del solo calorimetro, anche se di minor risoluzione, possono essere utili per aumentare il numero di fotoni visti ad alta energia e per fornire le informazioni necessarie all'osservazione di transienti con i telescopi Cherenkov a terra. La risoluzione angolare utilizzando il tracciatore è migliore nel caso della configurazione "enhanced". A basse energie ciò è possibile grazie al minore tungsteno, e di conseguenza minor "scattering" multiplo, presente all'interno del tracciatore. Il calorimetro più piccolo, e più profondo, seppur ostacolando la ricostruzione dell'energia di fotoni ad alta energia, produce anche un numero minore di particelle di "backsplash" che peggiorano la ricostruzione delle tracce. L'area efficace totale della "baseline", potendo contare su un calorimetro più grande ed il "pre-shower", è più grande rispetto alla configurazione "enhanced". La risoluzione angolare, l'area efficace e la strategia di osservazione dello strumento contribuiscono alla sensitività per sorgenti puntiformi. La sensitività totale dello strumento è migliore per la "baseline" per energie maggiori di 5 GeV. Ho implementato un set prelminare di condizioni di "trigger" per lo studio dei raggi gamma tramite l'utilizzo delle informazioni del tracciatore. La necessità di rigettare la maggior parte delle particelle cariche deriva dall'elevato fondo presente in orbita (~10^6 protoni per raggio gamma) e una capacità di "downlink" limitata (~100 GB/day). Tra le due configurazioni si nota una differenza di meno dell'1% nel numero rimanente di protoni. Seppur promettente, tale risultato deve essere migliorato e possibili miglioramenti sono descritti nella tesi. Gli algoritmi di ricostruzione e "trigger" sono applicati all'analisi della possibilità di studiare "gamma-ray burst" (GRB) con la principale strumentazione a bordo di GAMMA-400. Una stima del numero di eventi non ricostruiti, perchè avvengono nel tempo morto tra due "trigger", è effettuata tramite la simulazione di un ipotetico GRB accoppiata ai tempi di arrivo dei fotoni presi dai dati reali di due GRB osservati da Fermi. In nessuna delle due configurazioni è visibile una percentuale significativa di "pile-up". Anche aumentando il flusso dei GRB la percentuale di eventi non ricostruiti non supera mai il 6%. Nonostante questo risultato, molto dipenderà dal disegno finale dell’elettronica di lettura dei rivelatori che potrebbe aumentare i tempi morti dello strumento.
XXVII Ciclo
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Nakauchi, Daisuke. « Gamma-Ray Bursts from First Stars and Ultra-Long Gamma-Ray Bursts ». 京都大学 (Kyoto University), 2015. http://hdl.handle.net/2433/199100.
Texte intégralKomura, Shotaro. « Imaging Polarimeter for a Sub-MeV Gamma-Ray All-sky Survey Using an Electron-tracking Compton Camera ». Kyoto University, 2018. http://hdl.handle.net/2433/230989.
Texte intégralSawano, Tatsuya. « Simulation Study on an Electron-Tracking Compton Camera for Deep Gamma-ray Burst Search ». 京都大学 (Kyoto University), 2017. http://hdl.handle.net/2433/225397.
Texte intégralHotokezaka, Kenta. « Theoretical study of signals from binary neutron star mergers ». 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188486.
Texte intégralHayakawa, Tomoyasu. « Black-Hole forming Supernovae ». Kyoto University, 2020. http://hdl.handle.net/2433/253091.
Texte intégralFujibayashi, Sho. « Properties of the Ejecta from Binary Neutron Star Merger Remnants and Implications for the Electromagnetic Signal Associated with GW170817 ». Kyoto University, 2018. http://hdl.handle.net/2433/232244.
Texte intégralYamazaki, Ryo. « Toward the Unified Theory of Long and Short Gamma-Ray Bursts, X-Ray Rich Gamma-Ray Bursts, and X-Ray Flashes ». 京都大学 (Kyoto University), 2004. http://hdl.handle.net/2433/147812.
Texte intégralIoka, Kunihito. « Relativistic jets from magnetars towards understanding Gamma-Ray Bursts ». 京都大学 (Kyoto University), 2001. http://hdl.handle.net/2433/150815.
Texte intégralAoi, Junichi. « Exploring the Gamma Ray Bursts from GeV-TeV spectra ». 京都大学 (Kyoto University), 2011. http://hdl.handle.net/2433/142363.
Texte intégralChapitres de livres sur le sujet "GAMMA-400"
Hicks, K. H. « Spin-Observables for the $$(\vec{p},p'\gamma )$$ Reactions at 400 MeV ». Dans Spin Observables of Nuclear Probes, 111–17. Boston, MA : Springer US, 1988. http://dx.doi.org/10.1007/978-1-4613-0769-3_9.
Texte intégralGehrels, Neil, et John K. Cannizzo. « Gamma-ray telescopes ». Dans 400 Years of Astronomical Telescopes, 395–406. Dordrecht : Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2233-2_27.
Texte intégralPinkau, Klaus. « History of gamma-ray telescopes and astronomy ». Dans 400 Years of Astronomical Telescopes, 155–69. Dordrecht : Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2233-2_11.
Texte intégralVölk, Heinrich J., et Konrad Bernlöhr. « Imaging very high energy gamma-ray telescopes ». Dans 400 Years of Astronomical Telescopes, 171–89. Dordrecht : Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2233-2_12.
Texte intégralFegan, D. J., M. F. Cawley, K. Gibbs, P. W. Gorham, R. C. Lamb, N. A. Porter, P. T. Reynolds, V. J. Stenger et T. C. Weekes. « Search for a 12.59 ms. Pulsar in Cygnus X-3 at E > ; 400 GeV ». Dans Very High Energy Gamma Ray Astronomy, 111–14. Dordrecht : Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3831-1_13.
Texte intégralBegum, Shamsun Nahar, Mirza Mofazzal Islam et Rigyan Gupta. « Development of the first kabuli type chickpea mutant variety in Bangladesh. » Dans Mutation breeding, genetic diversity and crop adaptation to climate change, 203–8. Wallingford : CABI, 2021. http://dx.doi.org/10.1079/9781789249095.0020.
Texte intégralEmery, K. O., et David Neev. « Climate Inferred from Geology and Archaeology ». Dans The Destruction of Sodom, Gomorrah, and Jericho. Oxford University Press, 1995. http://dx.doi.org/10.1093/oso/9780195090949.003.0006.
Texte intégral« Extended Compartmental Model ». Dans Controlling Epidemics With Mathematical and Machine Learning Models, 96–118. IGI Global, 2022. http://dx.doi.org/10.4018/978-1-7998-8343-2.ch005.
Texte intégral« As mentioned in the previous chapter, many experiments on food irradiation in the 1950s were carried out with spent-fuel rods from nuclear reactors. Such fuel rods contain a mixture of many fission products, with greatly differing half-lives, emitting different types of radiation with different energies. The composition of fuel rods changes all the time because the radionuclides with short half-lives disappear quickly, whereas those with longer half-lives remain. Although fuel rods are primarily a source of gamma radiation (the less penetrating alpha and beta radiation are absorbed by the steel hull of the rods) they do give off some neutrons. Since the latter can produce radioactivity when they interact with matter such as food, fuel rods have not been used for irraditation of foods since the early 1960s. Because of their constantly varying composition, fuel rods also make dosimetry difficult, and this was another reason for abandoning their use. Individual constituents of spent fuel rods can be separated in reprocessing plants by chemical methods. One of the radionuclides obtainable in this way is Cs. With a half-life of 30 years and emission of gamma radiation (0.66 MeV) and beta radiation (0.51 MeV and 1.18 MeV), '^C s decays to stable '^B a (barium). After the ,37Cs is separated from the other constituents of the fission waste in the form of CsCl it is triply encapsulated in stainless steel containers because CsCl is soluble in water. If it leaked out it could cause contamination of the environment. As provided by the Waste Encapsulation and Storage Facility (WESF) at Hanford, Washington, the 137Cs capsule is 400 mm in active length (500 mm in total length) and 67 mm in diameter. There are only a few reprocessing plants in the world and the capacity for extracting ,37Cs from spent fuel rods is very limited. Plans for building several commercial reprocessing facilities in the United States were canceled by Presi dent Carter’s 1977 decision that the United States would not engage in commer cial reprocessing of spent nuclear fuel. As a consequence, not much ,37Cs is available and there are not many gamma radiation facilities which use ,Cs. No ». Dans Safety of Irradiated Foods, 31. CRC Press, 1995. http://dx.doi.org/10.1201/9781482273168-23.
Texte intégral« where K = kelvin. Because of the low temperature elevation in the low dose range, radiation calorimetry is limited in practice to the dose range above 3 kGy. This small temperature elevation is the gross result of the complex process of radiation interaction with matter. The individual steps of this process depend on the type of radiation used. Another type of physical dose meter, one that is used more and more in research and in industrial practice, is the alanine/electron spin resonance (ESR) system. Stable free radicals produced by irradiation in a concentration propor tional to the radiation dose in samples of pure, dry alanine are measured by ESR spectroscopy. The alanine is usually mixed 4:1 with paraffin (26) or 1:1 with polystyrene (27) of analytical grade quality. Reproducible dose response curves are obtained in the extremely wide dose range of 1 Gy to 100 kGy. In principal, any reproducible change caused by irradiation of a medium can be used to measure the absorbed radiation dose. In practice, only those changes can be evaluated which are stable for a reasonable length of time and which can be reliably measured by standard procedures such as titration or spectrophotometry. The chemical change is usually expressed as the G value, which is a measure of the number of atoms, molecules, or ions produced ( + G) or destroyed ( -G ) by 100 eV of absorbed energy. In the new SI system of units the G value is expressed as per J instead of per 100 eV. An important reference dose meter in food irradiation is the ferrous sulfate or Fricke dose meter. It is based on the radiation-induced oxidation of ferrous ions (Fe + ) to ferric ions (Fe + ) and consists of measuring the increased optical absorbance of the ferric ions at the absorption peak of 305 nm. For 60Co gamma rays the G value for ferric ion yield is 15.6 Fe3+ ions per 100 eV, or 9.74 X 1017 ions/J ; the yield for electrons at a dose rate of 108 Gy/sec is 13.0. Fricke dosimetry is useful in the range 3 Gy. The upper limit can be extended into the kGy range by adding CuS04, which reduces the G value from 15.6 to 0.65. There are many other systems, such as the ethanol-chlorobenzene dose meter, which is based on the formation of hydrochloric acid from chlorobenzene. The hydrochloric acid can be measured by titration or by its effect on the dielectric constant. The useful dose range of this system is 1-400 Gy. In the low dose range, down to 5 Gy, radiochromic dye dosimetry can be used. When the colorless solution of pararosaniline cyanide in 2-methoxyethanol and glacial acetic acid is irradiated, an intense red color develops with an absorption maximum at 549 nm. More recently proposed methods belonging to the group of liquid dose meter systems are listed in Table 3. PMA (polymethyl methacrylate) dose meters belong to the group of solid phase dose meters. Irradiation of PMMA (e.g., Perspex) induces an absorption ». Dans Safety of Irradiated Foods, 50. CRC Press, 1995. http://dx.doi.org/10.1201/9781482273168-39.
Texte intégralActes de conférences sur le sujet "GAMMA-400"
Topchiev, Nikolay. « GAMMA-400 gamma-ray observatory ». Dans The 34th International Cosmic Ray Conference. Trieste, Italy : Sissa Medialab, 2016. http://dx.doi.org/10.22323/1.236.1026.
Texte intégralTopchiev, Nikolay, Arkadiy Galper, Valter Bonvicini, Irina Arkhangelskaja, Andrey Arkhangelskiy, Alexey Bakaldin, Sergey Bobkov et al. « High-energy gamma-ray studying with GAMMA-400 ». Dans 35th International Cosmic Ray Conference. Trieste, Italy : Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.301.0802.
Texte intégralBongi, M. « The GAMMA-400 Space Experiment ». Dans International Conference on Advanced Technology and Particle Physics. WORLD SCIENTIFIC, 2014. http://dx.doi.org/10.1142/9789814603164_0003.
Texte intégralSpillantini, P. « The Gamma-400 space mission ». Dans 10th International Conference on Large Scale Applications and Radiation Hardness of Semiconductor Detectors. Trieste, Italy : Sissa Medialab, 2012. http://dx.doi.org/10.22323/1.143.0012.
Texte intégralLeonov, A., A. M. Galper, Oscar Adriani, R. L. Aptekar, Irina Arkhangelskaja, Andrey Arkhangelskiy, S. G. Bobkov et al. « The GAMMA-400 gamma-ray telescope characteristics. Angular resolution and electrons/protons separation. » Dans Science with the New Generation of High Energy Gamma-ray experiments, 10th Workshop. Trieste, Italy : Sissa Medialab, 2015. http://dx.doi.org/10.22323/1.218.0008.
Texte intégralGalper, A. M., O. Adriani, R. L. Aptekar, I. V. Arkhangelskaja, A. I. Arkhangelskiy, M. Boezio, V. Bonvicini et al. « Design and performance of the GAMMA-400 gamma-ray telescope for dark matter searches ». Dans CENTENARY SYMPOSIUM 2012 : DISCOVERY OF COSMIC RAYS. AIP, 2013. http://dx.doi.org/10.1063/1.4792586.
Texte intégralTopchiev, Nikolai P., Sergey I. Suchkov, Arkady M. Galper, Alexey A. Leonov, Yury T. Yurkin, Valter Bonvicini et Oscar Adriani. « The GAMMA-400 space mission for measuring high-energy gamma rays and cosmic rays ». Dans Proceedings of the MG14 Meeting on General Relativity. WORLD SCIENTIFIC, 2017. http://dx.doi.org/10.1142/9789813226609_0423.
Texte intégralBakaldin, Alexey, Sergey Bobkov, Oleg Serdin, Maxim S. Gorbunov, Andrey I. Arkhangelskiy, Alexey A. Leonov et Nikolay Topchiev. « The high-performance data acquisition system for the GAMMA-400 satellite-borne gamma-ray telescope ». Dans 35th International Cosmic Ray Conference. Trieste, Italy : Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.301.0810.
Texte intégralRuntso, Mikhail, Irina Arkhangelskaja, Andrey Arkhangelskiy, A. M. Galper, Maxim Kheymits, V. A. Kaplin, A. Leonov et al. « Implementation of silicon photomultipliers in scintillation detector systems of the GAMMA-400 space gamma-ray telescope ». Dans International Conference on New Photo-detectors. Trieste, Italy : Sissa Medialab, 2016. http://dx.doi.org/10.22323/1.252.0008.
Texte intégralMikhailov, Vladimir, A. M. Galper, N. P. Topchiev, I. V. Arkhangelskaja, A. I. Arkhangelskiy, A. V. Bakaldin, I. V. Chernysheva et al. « Capabilities of the GAMMA-400 gamma-ray telescope to detect electron + positron flux at TeV-energies from lateral directions ». Dans 27th European Cosmic Ray Symposium. Trieste, Italy : Sissa Medialab, 2023. http://dx.doi.org/10.22323/1.423.0155.
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