Log in

Relevant bibliographies by topics / Very high energy electrons / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Very high energy electrons.

Dissertations / Theses on the topic 'Very high energy electrons'

Author: Grafiati

Published: 20 July 2024

Last updated: 31 July 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Very high energy electrons.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Ronga, Maria Grazia. "Study and modelling of very high energy electrons (VHEE) radiation therapy." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPAST036.

Full text

Abstract:

Le développement de méthodes innovantes susceptibles de réduire la sensibilité des tissus sains aux radiations, tout en maintenant l'efficacité du traitement sur la tumeur, est un aspect central de l'amélioration de l'efficacité de la radiothérapie pour le traitement du cancer. Parmi les développements et innovations méthodologiques possibles, la combinaison d'une irradiation à ultra-haut débit de dose (FLASH) et d'électrons de très haute énergie (VHEE) pourrait permettre d'exploiter les avantages radiobiologiques de l'effet FLASH pour le traitement des tumeurs profondes. En particulier, les V

APA, Harvard, Vancouver, ISO, and other styles

2

Mallot, Ann Kathrin. "The energy spectrum of cosmic electrons measured with the MAGIC telescopes." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2017. http://dx.doi.org/10.18452/17698.

Full text

Abstract:

Die hier vorgestellte Analyse nutzt die MAGIC Teleskope, zwei abbildende Cherenkov-Teleskope, zum Vermessen des Elektronenflusses. Der Energiebereich dieser Teleskope überschneidet sich großflächig sowohl mit dem der Satellitenmissionen Fermi-LAT und AMS-02 als auch mit den hochenergetischen Messungen der Cherenkov-Teleskope VERITAS und H.E.S.S.. Diese Arbeit hat das Elektronenspektrum im Bereich von 135 GeV bis 4 TeV mittels der MAGIC Teleskope vermesssen. Das Spektrum lässt sich in diesem Bereich mit einem einfachen Potenzgesetz mit dem Index -3.14+-0.05(stat)+-0.5(syst) beschrieben werden.

APA, Harvard, Vancouver, ISO, and other styles

3

Kashiyama, Kazumi. "Origins of High Energy Cosmic-Ray Electrons and Positrons." 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/157757.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Carlton, Ashley Kelly. "Characterizing high-energy electrons in space using science imagers." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/120413.

Full text

Abstract:

Thesis: Ph. D., Massachusetts Institute of Technology, Department of Aeronautics and Astronautics, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 129-140).<br>Harsh radiation in the form of ionized, highly energetic particles is part of the space environment and can affect the operation, performance, and lifetime of spacecraft and their instruments. Jupiter has the largest and strongest magnetosphere of all of the planets in the solar system and it is dominated by high-energy electrons. Measuring and characterizing megaelectron volt (MeV) particles

APA, Harvard, Vancouver, ISO, and other styles

5

Aizatsky, N. I., N. P. Dikiy, A. N. Dovbnya, et al. "Properties of Zirconia Nanoceramics under High-Energy Electrons Irradiation." Thesis, Sumy State University, 2013. http://essuir.sumdu.edu.ua/handle/123456789/35622.

Full text

Abstract:

Formation of radioactive isotopes is investigated under irradiation by relativistic electrons with energy up to 100 MeV. Radioactive isotopes 87,88Y, 88,89,95Zr, 95Nb, 175Hf are registered after irradiation by relativistic electrons with energy 47.2 MeV. The present data are necessary for the choice of a material for a dielectric wakefield accelerator. The greatest danger at operation of accelerators represents 88Y. Formation of radiation defects in nanoceramics is investigated. The various types of radiation defects are found out at an irradiation by relativistic electrons with energy 47

APA, Harvard, Vancouver, ISO, and other styles

6

Dickinson, Hugh John. "Very high energy gamma-rays from binary systems." Thesis, Durham University, 2010. http://etheses.dur.ac.uk/290/.

Full text

Abstract:

This thesis presents a study of the very high energy (VHE) gamma-ray emission from X-ray binary systems using the H.E.S.S. imaging atmospheric Cherenkov array. The historical background and basic principles of ground-based gamma-ray astronomy are briefly reviewed and an overview of the design and capabilities of the H.E.S.S. telescope system is presented. The broadband observational properties of X-ray binary systems and their relevance in a broader astrophysical context is also discussed. A review of the radiative emission mechanisms which relate to VHE gamma-ray emission in X-ray binaries is

APA, Harvard, Vancouver, ISO, and other styles

7

Guillaud, Mathilde. "Neutrino oscillations at very high energy/matter density." Thesis, KTH, Fysik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-292510.

Full text

Abstract:

Neutrino oscillations in matter can be studied in different regimes, depending on the energy of the incoming neutrinos and the matter density of the medium. In this thesis we investigate neutrino oscillations in dense matter at very high energy (TeV-PeV range), taking into account the absorption that the neutrinos may undergo in such dense media. This absorption phenomenon is relevant for neutrino telescope measurements of astrophysical neutrinos. We begin with a brief reminder on neutrino oscillations in vacuum and the construction of the PMNS matrix. Then, we proceed with calculations for de

APA, Harvard, Vancouver, ISO, and other styles

8

Sritragool, Kunlapaporn. "Modification of Rubber Particle filled Thermoplastic with High Energy Electrons." Doctoral thesis, Universitätsbibliothek Chemnitz, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-201000954.

Full text

Abstract:

In present study, high energy electrons were used to modify blends based on RP and PP under two conditions: stationary and in-stationary conditions. Modification of blend under stationary condition is a process which is established in industrial application and where required absorbed dose is applied to form parts (after molding) at room temperature and in solid state. On the contrary, the modification of blend with high energy electrons under in-stationary condition is a new process (electron induced reactive processing) where required absorbed dose is applied to a molten state during melt mi

APA, Harvard, Vancouver, ISO, and other styles

9

Williams, Andrew James. "A water calorimeter for high energy x-rays and electrons." Thesis, University College London (University of London), 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.394541.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Lemieux, François 1979. "Are inflationary predictions sensitive to very high energy physics?" Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80316.

Full text

Abstract:

It was recently proposed that modifications to physics at trans-Planckian energies could lead to a non-adiabatic evolution of the scalar fluctuations responsible for the temperature anisotropy of the cosmological microwave background. If such a possibility was to be confirmed, it would provide us the first possibility to ever get experimental measurements of the physics near the Planck scale. This work investigates the physicality of such non-adiabatic evolutions, by avoiding the introduction of any exotic physics, by working well below the Planck scale. Simple 'hybrid-like' models of i

APA, Harvard, Vancouver, ISO, and other styles

11

Schroedter, Martin. "The very high energy gamma-ray spectra of AGN." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/290128.

Full text

Abstract:

A total of six extragalactic objects have been detected so far at very high energies (VHE). They are BL Lac objects, a sub-group of active galactic nuclei characterized by intense nonthermal radiation. The VHE spectra of two of these, 1ES 1959 + 650 and 1ES 2344 + 514, were measured in this work. Similar to the other four BL Lacs detected, their VHE spectrum and flux level is highly variable and shows a broadband spectrum characterized by two emission peaks: one in X-ray, the other at GeV to TeV energies. For one of these, 1ES 1959 + 650, simultaneous observations were carried out at other wav

APA, Harvard, Vancouver, ISO, and other styles

12

Dickinson, Mark R. "Very high energy gamma ray observations of southern hemisphere blazars." Thesis, Durham University, 1997. http://etheses.dur.ac.uk/4705/.

Full text

Abstract:

This thesis is concerned with very high energy γ-ray observations of blazars observable from the southern hemisphere. The data presented were obtained using the recently deployed University of Durham Mark 6 high sensitivity Čerenkov telescope. Chapters 1 and 2 are introductory; the subjects of γ-ray astronomy, extensive air showers, Čerenkov light production, the development of the atmospheric Čerenkov technique and the current status of TeV astronomy are discussed. Chapter 3 introduces the telescopes operated by the University of Durham. The Mark 6 telescope, designed to have a low threshold

APA, Harvard, Vancouver, ISO, and other styles

13

Mak, Wai-ying, and 麥偉瑩. "Very high energy gamma-ray emission from active galactic nuclei." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31221464.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Mak, Wai-ying. "Very high energy gamma-ray emission from active galactic nuclei /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B20567492.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Xiao, Dan. "Development and Investigation of High-Performance Fire Retardant Polypropylene Nanocomposites via High Energy Electrons." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-229650.

Full text

Abstract:

Polypropylene (PP) has excellent mechanical and chemical properties. Thus, it is used in a wide range of applications. However, like for most polymers, the high flammability of PP limits its application in various fields requiring specific flame-retardant standards. Some of halogenated flame retardants are restricted by European Community directives ROHs, WEEE and REACH. Now metallic hydroxides flame retardants are widely used in industry, but the high loading (about 60 wt %) seriously destroys the mechanical properties of polymeric materials. To improve the performance of flame retardant poly

APA, Harvard, Vancouver, ISO, and other styles

16

Robinson, D. "A study of high transverse momentum electrons produced in high energy proton-antiproton collisions." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47230.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Elgammal, Sherif. "Detection of high energy electrons in the CMS detector at the LHC." Doctoral thesis, Universite Libre de Bruxelles, 2009. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/210208.

Full text

Abstract:

Détection et identification de la réaction quark + anti-quark -> e+ + e- à l'aide du détecteur CMS (Compact Muon Solenoid) auprès du Grand Collisionneur de Hadrons du CERN, le LHC. Cette réaction permet de tester avec précision le Modèle Standard et de rechercher d'éventuelles nouvelles particules (Z') prédites par les théories de grande unification (GUT) et par les modèles à dimensions spatiales supplémentaires.<br>Doctorat en Sciences<br>info:eu-repo/semantics/nonPublished

APA, Harvard, Vancouver, ISO, and other styles

18

Wolfe, Gregory John. "Effects of Large Doses of High Energy Electrons on a YBa2Cu3O6 + delta High Temperature Superconductors." Thesis, Monterey, California. Naval Postgraduate School, 1989. http://hdl.handle.net/10945/25879.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Pallassini, Renato. "A study of very high energy Î³-ray emission from blazars." Thesis, University of Leeds, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.441185.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Cheesebrough, Alistair. "The search for very high energy γ-rays from misaligned AGN". Thesis, Durham University, 2013. http://etheses.dur.ac.uk/7717/.

Full text

Abstract:

The aim of this work is to study the potential for emission at very high energies (100 GeV) by misaligned active galactic nuclei (AGN) and the future prospects for observations of these objects with the next generation imaging atmospheric Cherenkov telescope, the Cherenkov Telescope Array (CTA). Initially, data collected by the H.E.S.S. array was used to study fourteen Seyfert galaxies and two other AGN with Seyfert-like properties and no new detections were reported. For each object upper limits were calculated, assuming a similar spectral shape to M87. Further work focused on modelling the G

APA, Harvard, Vancouver, ISO, and other styles

21

Kwok, Ping Wai. "Very high-energy gamma rays from the Crab nebula and pulsar." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184863.

Full text

Abstract:

This project is to search for Very High Energy (VHE) (10¹¹ eV to 10¹⁴ eV) gamma rays from the Crab nebula and pulsar using the atmospheric Cherenkov imaging technique. The technique uses an array of 37 photomultiplier tubes to record the images of the Cherenkov light pulses generated by energetic particles in the air showers initiated by VHE gamma rays or charged cosmic rays. Gamma-ray-like events are selected from numerous cosmic-ray events based on the predicted properties of the image, such as the size, shape, and orientation with respect to the axis of the detector. A steady weak flux of V

APA, Harvard, Vancouver, ISO, and other styles

22

Fegan, Stephen. "A very high energy gamma-ray survey of unidentified EGRET sources." Diss., The University of Arizona, 2004. http://hdl.handle.net/10150/280605.

Full text

Abstract:

A survey of unidentified 100 MeV γ-ray sources is undertaken, with the Whipple 10m telescope, with the objective of detecting very high energy (>350 GeV) γ-ray emission. The survey consists of nineteen sets of observations of sources detected by the EGRET instrument on the Compton Gamma-Ray Observatory between 1991 and 1995. Results for 21 EGRET sources are reported; in some cases two EGRET sources are close enough to be viewed in a single observation. For each EGRET source, candidate associations are listed and the implications of each candidate for VHE emission discussed. Finally, a study of

APA, Harvard, Vancouver, ISO, and other styles

23

Hu, Hsiu-Lien. "Quantum transport of energetic electrons in ballistic nanostructures." Virtual Press, 2000. http://liblink.bsu.edu/uhtbin/catkey/1178341.

Full text

Abstract:

The various electronic phenomena of electrons in the quasi-one-dimensional semiconducotor heterostructures have been largely investigated in the past research, due to its importance both on the theoretical understanding and the design of nanodevices. In particular, most research is currently based on the GaAs-AIGaAs material system with a 2-DEG interface. From the study of Hua Wu, following the Bohm's interpretation of quantum mechanics, energetic electrons approximately approach the classical behavior. The goal of this theoretical study is to investigate how the flow of energetic electrons ma

APA, Harvard, Vancouver, ISO, and other styles

24

Schlenker, Stefan. "Very high energy gamma rays from the binary pulsar PSR B1259-63." Doctoral thesis, [S.l. : s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=976502267.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Rayner, Stephen Mark. "Very high energy gamma rays from isolated pulsars and non-pulsating objects." Thesis, Durham University, 1989. http://etheses.dur.ac.uk/6458/.

Full text

Abstract:

This thesis is concerned with the detection of very high energy 7-rays from isolated pulsars and objects that are not known to emit pulsed radiation, using the atmospheric Cerenkov technique. The first chapter summarises the processes by which celestial 7-rays can be generated and absorbed. A discussion of the criteria for selecting objects for study is given. The second chapter describes the atmospheric Cerenkov technique and gives a brief outline of its historical development. Details of the design and operation of the current Durham university V.H.E. 7- ray telescopes are given. The third c

APA, Harvard, Vancouver, ISO, and other styles

26

Chadwick, Mary Paula. "Very high energy cosmic gamma rays from radio and X-ray pulsars." Thesis, Durham University, 1987. http://etheses.dur.ac.uk/6720/.

Full text

Abstract:

This thesis is concerned with the detection of very high energy cosmic gamma-rays from isolated pulsars and X-ray binary sources using the atmospheric Cerenkov technique. A general introduction to gamma ray detection techniques is followed by adscription of the properties of atmospheric Cerenkov radiation and a discussion of the principles of the atmospheric Cerenkov technique. The Mark I and Mark II gamma-ray telescopes operated in Dugway, Utah by the University of Durham between 1981 and 1984 are briefly described. There follows a discussion of the results from observations at many different

APA, Harvard, Vancouver, ISO, and other styles

27

Vasileiou, Vlasios. "A search for bursts of very high energy gamma rays with milagro." College Park, Md.: University of Maryland, 2008. http://hdl.handle.net/1903/8570.

Full text

Abstract:

Thesis (Ph. D.) -- University of Maryland, College Park, 2008.<br>Thesis research directed by: Dept. of Physics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

APA, Harvard, Vancouver, ISO, and other styles

28

Gajdus, Michael. "The Vela pulsar in very high energy gamma-rays with H.E.S.S. II." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät, 2016. http://dx.doi.org/10.18452/17610.

Full text

Abstract:

Die vorliegende Dissertation analysiert Beobachtungen des Vela-Pulsars mit dem H.E.S.S.-Observatorium und präsentiert damit den ersten Nachweis gepulster Strahlung mit H.E.S.S. Die signifikante Detektion (11.4 s) oberhalb einer bis jetzt unerreichten Energieschwelle von lediglich 15 GeV wurde mittels von 24 h Beobachtungsdaten erzielt, die mit dem im Jahr 2012 in Betrieb genommenen CT5-Teleskop aufgezeichnet wurden. Nach dem Krebs-Pulsar ist damit der Vela-Pulsar der zweite Pulsar, von dem sehr hochenergetische Gammastrahlung nachgewiesen wurde. Die Spektren von Pulsaren im Bereich der sehr

APA, Harvard, Vancouver, ISO, and other styles

29

Wagner, Robert M. "Very High Blazar Astrophysics : Measurement of Very High Energy Gamma-Ray Emission from Four Blazars Using the MAGIC Telescope and a Comparative Blazar Study /." Fischbachtal, Odenw : HARLAND media, 2007. http://deposit.d-nb.de/cgi-bin/dokserv?id=3001678&prov=M&dok_var=1&dok_ext=htm.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Hoffmann, Agnes Irene Dorothee. "Analysis of hard X-ray emission from selected very high energy g-ray." Reutlingen, Bruno-Matzke-Str.15 A. Hoffmann, 2009. http://d-nb.info/999640429/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Noyes, David Carl. "A search for short duration very high energy emission from gamma-ray bursts." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/2910.

Full text

Abstract:

Thesis (Ph. D.) -- University of Maryland, College Park, 2005.<br>Thesis research directed by: Physics. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

APA, Harvard, Vancouver, ISO, and other styles

32

Hayashida, Masaaki. "Observation of Very-High-Energy Gamma-Rays from Blazars with the MAGIC Telescope." Diss., lmu, 2008. http://nbn-resolving.de/urn:nbn:de:bvb:19-82911.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Hinman, Roderick Thornton. "Recovered energy logic--a logic family and power supply featuring very high efficiency." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/12015.

Full text

Abstract:

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1994.<br>Includes bibliographical references (p. 215-220).<br>by Roderick Thornton Hinman.<br>Ph.D.

APA, Harvard, Vancouver, ISO, and other styles

34

Tsirou, Michelle. "Study of Pulsar Wind Nebulae in Very-High-Energy gamma-rays with H.E.S.S." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTS096.

Full text

Abstract:

Pulsar wind nebulae consist of magnetised clouds of positrons and electrons accelerated to very high energies through the action of a central pulsar, often embedded within a host supernova remnant. They are the largest population of firmly identified sources of TeV gamma-rays within the Galaxy and are thought to be contributors to the leptonic Galactic cosmic-ray spectrum,and thus viable source candidates in the quest to interpret the origin of the cosmic-ray positron fraction excess. Their very-high-energy gamma-ray emission is of particular interest for spectral models, as their dominant rad

APA, Harvard, Vancouver, ISO, and other styles

35

Theiling, Mark. "Observations of very high energy gamma ray emission from supernova remnants with VERITAS." Connect to this title online, 2009. http://etd.lib.clemson.edu/documents/1263397351/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Chandril, Sandeep. "In situ structural and compositional analysis using RHEED electrons induced x-rays." Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10641.

Full text

Abstract:

Thesis (Ph. D.)--West Virginia University, 2009.<br>Title from document title page. Document formatted into pages; contains ix, 97 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 95-97).

APA, Harvard, Vancouver, ISO, and other styles

37

Clark, Michelle Susan. "Improving the feasibility of energy disaggregation in very high- and low-rate sampling scenarios." Thesis, University of British Columbia, 2015. http://hdl.handle.net/2429/54873.

Full text

Abstract:

Given the world's urgent need to reduce greenhouse gas emissions in order to avoid the most disastrous effects of climate change, efforts must be made to reduce these emissions in every way possible. A large share of these emissions come from the energy consumption in buildings and there are significant opportunities to reduce this consumption through energy saving measures. Energy disaggregation or non-intrusive load monitoring (NILM) is a useful tool that infers the energy consumption of individual appliances or equipment within a building from detailed measurements of the building's total e

APA, Harvard, Vancouver, ISO, and other styles

38

Bartko, Hendrik. "Observation of Galactic Sources of Very High Energy Gamma-Rays with the MAGIC Telescope." Diss., Lichtenberg (Odw.) : Harland Media, 2007. http://deposit.d-nb.de/cgi-bin/dokserv?id=3001679&prov=M&dok_var=1&dok_ext=htm.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Keogh, Dominic Robert. "The search for pulsar wind nebulae in the very high energy gamma-ray regime." Thesis, Durham University, 2010. http://etheses.dur.ac.uk/776/.

Full text

Abstract:

The aim of this Thesis is to study the development of pulsar wind nebulae in the TeV regime and in doing so uncover more sources which have as yet not been observed at these wavelengths. It is found that the extent of pulsar wind nebula in the TeV gamma-ray increases with its age while no developmental relationship is seen concerning the luminosity or spectral index of the nebulae when observed in the TeV gamma-ray regime due to uncertainties in the measurements available. TeV gamma-ray upper limits are calculated for several nebulae observed in the X-ray regime allowing the strength of their

APA, Harvard, Vancouver, ISO, and other styles

40

MacRae, John Hamish Kenneth. "The detection of very high energy cosmic gamma rays using the atmospheric Cerenkov technique." Thesis, Durham University, 1985. http://etheses.dur.ac.uk/7854/.

Full text

Abstract:

This thesis is concerned with the detection of very high energy cosmic gamma rays using the atmospheric Cerenkov technique. A general introduction to gamma ray detection techniques is followed by a detailed discussion of the principles of the atmospheric Cerenkov technique and the history of its use prior to this work. The design and operation of the University of Durham facility in Dugway, Utah is described in depth. Monte Carlo computer simulations have been developed to assist in both the understanding of the equipment and the analysis of the results for the Durham facility. The variation o

APA, Harvard, Vancouver, ISO, and other styles

41

Carraminana, Alberto. "Very high energy gamma ray astronomy and non pulsating low mass X-ray binaries." Thesis, Durham University, 1991. http://etheses.dur.ac.uk/6241/.

Full text

Abstract:

This thesis is concerned with non pulsating Low Mass X-Ray Binaries as Very High Energy γ-ray sources, in particular Scorpius X-1; the brightest of these objects in X-rays, and the most likely to be detectable at energies above 250 GeV. After a first introductory chapter, experimental techniques presently used in Very High Energy γ-ray Astronomy are reviewed. In the third chapter statistical techniques used to quantify count rate excesses and orbital modulations are described and applied to data from Scorpius X-1. Data taken in 1988 and 1989 showing a 3cr count excess, reported previously else

APA, Harvard, Vancouver, ISO, and other styles

42

Tomarchio, Salvatore Gaspare. "Power Switching Converters with very low power consumption and high efficiency for energy savings." Doctoral thesis, Università di Catania, 2013. http://hdl.handle.net/10761/1311.

Full text

Abstract:

The objective of this research is the analysis of power switching converters with targets of very low power consumption and high efficiency for being used in new system for energy savings. Typically, they are implemented as Switching Mode Power Supply (SMPS) modules in different type of applications in both consumer and energy businesses . In particular have been considered power supply systems with output power in the class of low and medium power, in the range from few watts up to hundreds watts. Referring to consumer business, the main fields of application are lighting and home appliances

APA, Harvard, Vancouver, ISO, and other styles

43

Ergin, Tülün. "The energy spectrum of very high energy gamma rays from the Crab Nebula as measured by the H.E.S.S. array." [S.l.] : [s.n.], 2005. http://deposit.ddb.de/cgi-bin/dokserv?idn=979099897.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Ergin, Tülün. "The energy spectrum of very high energy gamma rays from the Crab Nebula as measured by the H.E.S.S. array." Doctoral thesis, Humboldt-Universität zu Berlin, Mathematisch-Naturwissenschaftliche Fakultät I, 2006. http://dx.doi.org/10.18452/15435.

Full text

Abstract:

Das Thema dieser Arbeit ist die fuer das HEGRA Experiment entwickelte Rekonstruktions-Algoritmen, die Geometry und Energie von hochenergetischen kosmischen Gamma-Strahlen zu rekonstruieren, in die H.E.S.S. software Umgebung zu implementieren und das nicht-gepulste Energie-Spektrum des Krebsnebels zwischen Energien von 300 GeV und 20 TeV zu bestimmen. Dafuer wurden die ersten stereoskopischen Daten von Oktober und November 2003 mit einer 3 Teleskope-Konfiguration des H.E.S.S. Systems der Phase-I verwendet. Die Phase-I des H.E.S.S. Systems wurde im Dezember 2003 fertiggestellt, n

APA, Harvard, Vancouver, ISO, and other styles

45

Ernst, Darin R. (Darin Richard) 1965. "Momentum transport, radial electric field, and ion thermal energy confinement in very high temperature plasmas." Thesis, Massachusetts Institute of Technology, 1998. http://hdl.handle.net/1721.1/50337.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Krygier, Andrew. "On The Origin of Super-Hot Electrons in Intense Laser-Plasma Interactions." The Ohio State University, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=osu1365724528.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Zackrisson, Björn. "Biological effects of high energy radiation and ultra high dose rates." Doctoral thesis, Umeå universitet, Onkologisk radiobiologi, 1991. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-96889.

Full text

Abstract:

Recently a powerful electron accelerator, 50 MeV race-track microtron, has been taken into clinical use. This gives the opportunity to treat patients with higher x-ray and electron energies than before. Furthermore, treatments can be performed were the entire fractional dose can be delivered in parts of a second. The relative biological effectiveness (RBE) of high energy photons (up to 50 MV) was studied in vitro and in vivo. Oxygen enhancement ratio (OER) of 50 MV photons and RBE of 50 MeV electrons were investigated in vitro. Single-fraction experiments, in vitro, using V-79 Chinese hamster

APA, Harvard, Vancouver, ISO, and other styles

48

Brown, Anthony Murray. "Very high energy emission and multi-wavelength campaigns of the BL Lac object PKS 2155-304." Thesis, Durham University, 2006. http://etheses.dur.ac.uk/919/.

Full text

Abstract:

This thesis is concerned with multi-wavelength observations of the prominent southern hemisphere high energy BL Lac object, (HBL), PKS 2155-304. After a general introduction covering the particulars of Active Galactic Nuclei, the pysical processes and models that are believed to play an important role in the observations and ground based γ-ray astronomy, the results and interpretation of four individual multi-wavelength campaigns on PKS 2155-304 are presented. Lead by observations of the High Energy Stereoscopic System (H.E.S.S.), these campaigns include observations with RXTE, NTT at ESO, ROT

APA, Harvard, Vancouver, ISO, and other styles

49

Seglar-Arroyo, Monica. "Studying the origin of cosmic-rays : Multi-messenger studies with very-high-energy gamma-ray instruments." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS260.

Full text

Abstract:

Les phénomènes explosifs qui se produisent dans l'Univers à haute énergie sont capables d'accélérer les particules jusqu'aux énergies les plus élevées. Ces processus produisent des particules secondaires de nature différente, c'est-à-dire des photons et des neutrinos. Dans des cas particuliers, ces événements induisent des perturbations sur l'espace-temps, c'est-à-dire des ondes gravitationnelles détectables par des interféromètres sur Terre. La combinaison des informations complémentaires fournies par ces messagers cosmiques peuvent permettre de répondre à des questions ouvertes en astrophysi

APA, Harvard, Vancouver, ISO, and other styles

50

Collins, William James. "A measurement of the forward-backward asymmetry of e'+e'- -> Z'0 -> bb using electrons at OPAL." Thesis, University of Cambridge, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.309334.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!