Academic literature on the topic 'GAMMA-400'
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Journal articles on the topic "GAMMA-400"
Galper, A. M., N. P. Topchiev, and Yu T. Yurkin. "GAMMA-400 Project." Astronomy Reports 62, no. 12 (December 2018): 882–89. http://dx.doi.org/10.1134/s1063772918120223.
Full textTopchiev, 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 (February 5, 2016): 032009. http://dx.doi.org/10.1088/1742-6596/675/3/032009.
Full textArkhangelskiy, A. I., I. V. Arkhangelskaja, M. D. Kheymits, M. F. Runtso, S. I. Suchkov, N. P. Topchiev, and 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.
Full textGalper, 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 (January 2013): 297–300. http://dx.doi.org/10.1016/j.asr.2012.01.019.
Full textTopchiev, 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.
Full textEgorov, Andrey E., Nikolay P. Topchiev, Arkadiy M. Galper, Oleg D. Dalkarov, Alexey A. Leonov, Sergey I. Suchkov, and Yuriy T. Yurkin. "Dark matter searches by the planned gamma-ray telescope GAMMA-400." Journal of Cosmology and Astroparticle Physics 2020, no. 11 (November 24, 2020): 049. http://dx.doi.org/10.1088/1475-7516/2020/11/049.
Full textMikhailova, 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 (December 2020): 012026. http://dx.doi.org/10.1088/1742-6596/1690/1/012026.
Full textTopchiev, 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 (January 2017): 012011. http://dx.doi.org/10.1088/1742-6596/798/1/012011.
Full textChasovikov, E. N., I. V. Arkhangelskaja, A. A. Perfil‘ev, A. I. Arkhangelskiy, A. M. Galper, N. P. Topchiev, Yu V. Gusakov, M. D. Kheymits, and 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.
Full textTopchiev, 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 (March 2015): 417–20. http://dx.doi.org/10.3103/s1062873815030429.
Full textDissertations / Theses on the topic "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.
Full textPer 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
1987
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.
Full textKomura, 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.
Full textSawano, 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.
Full textHotokezaka, Kenta. "Theoretical study of signals from binary neutron star mergers." 京都大学 (Kyoto University), 2014. http://hdl.handle.net/2433/188486.
Full textHayakawa, Tomoyasu. "Black-Hole forming Supernovae." Kyoto University, 2020. http://hdl.handle.net/2433/253091.
Full textFujibayashi, 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.
Full textYamazaki, 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.
Full textIoka, Kunihito. "Relativistic jets from magnetars towards understanding Gamma-Ray Bursts." 京都大学 (Kyoto University), 2001. http://hdl.handle.net/2433/150815.
Full textAoi, Junichi. "Exploring the Gamma Ray Bursts from GeV-TeV spectra." 京都大学 (Kyoto University), 2011. http://hdl.handle.net/2433/142363.
Full textBook chapters on the topic "GAMMA-400"
Hicks, K. H. "Spin-Observables for the $$(\vec{p},p'\gamma )$$ Reactions at 400 MeV." In Spin Observables of Nuclear Probes, 111–17. Boston, MA: Springer US, 1988. http://dx.doi.org/10.1007/978-1-4613-0769-3_9.
Full textGehrels, Neil, and John K. Cannizzo. "Gamma-ray telescopes." In 400 Years of Astronomical Telescopes, 395–406. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2233-2_27.
Full textPinkau, Klaus. "History of gamma-ray telescopes and astronomy." In 400 Years of Astronomical Telescopes, 155–69. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2233-2_11.
Full textVölk, Heinrich J., and Konrad Bernlöhr. "Imaging very high energy gamma-ray telescopes." In 400 Years of Astronomical Telescopes, 171–89. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-2233-2_12.
Full textFegan, D. J., M. F. Cawley, K. Gibbs, P. W. Gorham, R. C. Lamb, N. A. Porter, P. T. Reynolds, V. J. Stenger, and T. C. Weekes. "Search for a 12.59 ms. Pulsar in Cygnus X-3 at E > 400 GeV." In Very High Energy Gamma Ray Astronomy, 111–14. Dordrecht: Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3831-1_13.
Full textBegum, Shamsun Nahar, Mirza Mofazzal Islam, and Rigyan Gupta. "Development of the first kabuli type chickpea mutant variety in Bangladesh." In Mutation breeding, genetic diversity and crop adaptation to climate change, 203–8. Wallingford: CABI, 2021. http://dx.doi.org/10.1079/9781789249095.0020.
Full textEmery, K. O., and David Neev. "Climate Inferred from Geology and Archaeology." In The Destruction of Sodom, Gomorrah, and Jericho. Oxford University Press, 1995. http://dx.doi.org/10.1093/oso/9780195090949.003.0006.
Full text"Extended Compartmental Model." In 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.
Full text"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." In Safety of Irradiated Foods, 31. CRC Press, 1995. http://dx.doi.org/10.1201/9781482273168-23.
Full text"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." In Safety of Irradiated Foods, 50. CRC Press, 1995. http://dx.doi.org/10.1201/9781482273168-39.
Full textConference papers on the topic "GAMMA-400"
Topchiev, Nikolay. "GAMMA-400 gamma-ray observatory." In The 34th International Cosmic Ray Conference. Trieste, Italy: Sissa Medialab, 2016. http://dx.doi.org/10.22323/1.236.1026.
Full textTopchiev, Nikolay, Arkadiy Galper, Valter Bonvicini, Irina Arkhangelskaja, Andrey Arkhangelskiy, Alexey Bakaldin, Sergey Bobkov, et al. "High-energy gamma-ray studying with GAMMA-400." In 35th International Cosmic Ray Conference. Trieste, Italy: Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.301.0802.
Full textBongi, M. "The GAMMA-400 Space Experiment." In International Conference on Advanced Technology and Particle Physics. WORLD SCIENTIFIC, 2014. http://dx.doi.org/10.1142/9789814603164_0003.
Full textSpillantini, P. "The Gamma-400 space mission." In 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.
Full textLeonov, 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." In 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.
Full textGalper, 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." In CENTENARY SYMPOSIUM 2012: DISCOVERY OF COSMIC RAYS. AIP, 2013. http://dx.doi.org/10.1063/1.4792586.
Full textTopchiev, Nikolai P., Sergey I. Suchkov, Arkady M. Galper, Alexey A. Leonov, Yury T. Yurkin, Valter Bonvicini, and Oscar Adriani. "The GAMMA-400 space mission for measuring high-energy gamma rays and cosmic rays." In Proceedings of the MG14 Meeting on General Relativity. WORLD SCIENTIFIC, 2017. http://dx.doi.org/10.1142/9789813226609_0423.
Full textBakaldin, Alexey, Sergey Bobkov, Oleg Serdin, Maxim S. Gorbunov, Andrey I. Arkhangelskiy, Alexey A. Leonov, and Nikolay Topchiev. "The high-performance data acquisition system for the GAMMA-400 satellite-borne gamma-ray telescope." In 35th International Cosmic Ray Conference. Trieste, Italy: Sissa Medialab, 2017. http://dx.doi.org/10.22323/1.301.0810.
Full textRuntso, 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." In International Conference on New Photo-detectors. Trieste, Italy: Sissa Medialab, 2016. http://dx.doi.org/10.22323/1.252.0008.
Full textMikhailov, 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." In 27th European Cosmic Ray Symposium. Trieste, Italy: Sissa Medialab, 2023. http://dx.doi.org/10.22323/1.423.0155.
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