Exploració per tema "Electrons"

Ara es mostren els items 1-18 de 18

    • A novel electron gun for off-beam injection 

      Koubychine Merkulov, Youri Alexandrovich; Aloev, A.V.; Shvedunov, V.I.; Pakhomov, N.I. (2011)
      Comunicació de congrés
      Accés obert
      For certain type of electron accelerators injection from an off-axis cathode is required. This is the case of a racetrack microtron (RTM), in which the beam passes several times through the accelerating structure, or ...

    • Allen Bradley PLC programming in the ALBA Synchrotron consortium 

      Domínguez Catarineu, Albert (Universitat Politècnica de Catalunya, 2017-06)
      Treball Final de Grau
      Accés restringit per decisió de l'autor
      The world of accelerators is constantly growing and more discoveries are produced by the several experiments performed there. One of the main points of the accelerators is the radio frequency, which is used to accelerate ...

    • Condicionament de cavitats de radiofreqüència 

      Pont Guixa, Albert (Universitat Politècnica de Catalunya, 2014-06)
      Treball Final de Grau
      Accés obert
      El projecte exposat a continuació tracta de la realització del procés de condicionament de cavitats, dut a terme a l’empresa CELLS (Consorci per a la Construcció, Equipament i Explotació del Laboratori de Llum de Sincrotró) ...

    • Current status of the 12 MeV UPC race-track microtron 

      Koubychine Merkulov, Youri Alexandrovich; Berenguer Sau, Jordi; Crisol, A; Gonzalez, Xavier; Montoro López, Gabriel; Rigla Perez, Juan Pablo; Roure Fernández, Francisco; Carrillo, David; Garcia-Tabares, Luis; Toral, F; Lucas, J; Aloev, A.V.; Shvedunov, V.I. (2009)
      Comunicació de congrés
      Accés obert
      A com­pact race-track mi­crotron (RTM) with the max­i­mal out­put en­er­gy 12 MeV is under con­struc­tion at the Uni­ver­si­tat Politècnica de Catalun­ya (UPC) in col­lab­o­ra­tion with the Sko­belt­syn In­sti­tute of ...

    • Development and applications of a computer code for Monte Carlo simulation of electronphoton showers 

      Sempau Roma, Josep (Universitat Politècnica de Catalunya, 1996-02-29)
      Tesi
      Accés obert
      Se presenta el trabajo realizado sobre el paquete de Subrrutinas Penélope. Este código permite la simulación MC del transporte de fotones y electrones en la materia con geometrías complejas. Los aspectos considerados ...

    • Electron refraction at lateral atomic interfaces 

      Abd El-Fattah, Z. M.; Kher-Elden, M A.; Yassin, O.; El-Okr, M. M.; Ortega, J. E.; García de Abajo, Francisco Javier (AIP, 2017-10-01)
      Article
      Accés obert
      We present theoretical simulations of electron refraction at the lateral atomic interface between a “homogeneous” Cu(111) surface and the “nanostructured” one-monolayer (ML) Ag/Cu(111) dislocation lattice. Calculations ...

    • Imaging an aligned polyatomic molecule with laser-induced electron diffraction 

      Pullen, Michael G.; Wolter, Benjamin; Le, Anh-Thu; Baudisch, Matthias; Hemmer, Michaël; Senftleben, Arne; Schröter, Claus Dieter; Ullrich, Joachim; Moshammer, Robert; Lin, C. D.; Biegert, Jens (Nature Publishing Group, 2015-06-24)
      Article
      Accés obert
      Laser-induced electron diffraction is an evolving tabletop method that aims to image ultrafast structural changes in gas-phase polyatomic molecules with sub-Ångstro¨m spatial and femtosecond temporal resolutions. Here ...

    • Imaging an isolated water molecule with an attosecond electron wave packet 

      Liu, Xinyao; Amini, Kasra; Steinle, Tobias; Sánchez, Aurelien; Moniruzzaman, Shaikh; Belsa Carné, Blanca Maria; Steinmetzer, Johannes; Anh-Thu, Le; Moshammer, Robert; Pfeifer, Thomas; Ullrich, Joachim; Moszynski, Robert; Lin, Chii-Dong; Gräfe, Stefanie; Biegert, Jens (Institute of Physics (IOP), 2020-01-01)
      Article
      Accés obert
      We use laser-induced electron diffraction (LIED) to self-image the molecular structure of an isolated water molecular ion using its own retuning attosecond electron wave packet (EWP). Using LIED’s sub-femtosecond and ...

    • Improvement and validation of retrieved FORMOSAT-3/COSMIC electron densities using Jicamarca DPS 

      Aragón Ángel, María Ángeles; Liou, Y.-A.; Lee, C.C.; Hernández Pajares, Manuel; Sanz Subirana, Jaume; Juan Zornoza, José Miguel; Reinisch, B.W. (2010)
      Presentació
      Accés obert

    • Interaction of photosystem I from Phaeodactylum tricornutum with plastocyanins as compared with its native cytochrome c6: Reunion with a lost donor 

      Bernal-Bayard, Pilar; Pallara, Chiara; Castell, M. Carmen; Molina-Heredia, Fernando P.; Fernández-Recio, Juan; Hervás, Manuel; Navarro, José A. (Elsevier, 2015-12)
      Article
      Accés obert
      In the Phaeodactylum tricornutum alga, as in most diatoms, cytochrome c6 is the only electron donor to photosystem I, and thus they lack plastocyanin as an alternative electron carrier. We have investigated, by using ...

    • Performance of the magnetic system of a 12 MeV UPC race-track microtron 

      Koubychine Merkulov, Youri Alexandrovich; Rigla Perez, Juan Pablo; Shvedunov, V.I.; Pakhomov, N.I. (2012)
      Comunicació de congrés
      Accés obert
      The per­for­mance of the mag­netic sys­tem of a 12 MeV elec­tron race-track mi­cro­tron (RTM) which is under con­struc­tion at the Uni­ver­si­tat Politècnica de Catalunya (UPC) is de­scribed. The RTM mag­netic sys­tem ...

    • RF and accelerating structure of 12 MeV UPC race-track microtron 

      Koubychine Merkulov, Youri Alexandrovich; Gonzalez, Xavier; Montoro López, Gabriel; Carrillo, David; Garcia-Tabares, Luis; Toral, Fernando; Mathot, Serge Jean; Shvedunov, V.I. (2012)
      Comunicació de congrés
      Accés obert
      We describe the design and technical characteristics of a C-band SW accelerating structure of a 12 MeV race-track microtron, which is under construction at the Technical University of Catalonia, and its RF system with a ...

    • Searches for nonminimal Higgs bosons from a virtual Z decaying into a muon pair at the SLAC e+ e- storage ring PEP 

      Komamiya, S.; Fordham, C.; Abrams, Geoffrey; Calviño Tavares, Francisco (American Physical Society (APS), 1989-08-01)
      Article
      Accés restringit per política de l'editorial
      Nonminimal neutral Higgs bosons decaying into a muon pair were searched for using the Mark II detector at the SLAC e+e- collider PEP at SQRT(s) =29 GeV. A neutral scalar Higgs boson H0s can be produced accompanied by a ...

    • Second harmonic generation from an ITO nanolayer: experiment versus theory 

      Rodríguez Suñé, Laura; Scalora, Michael; Johnson, Allan; Cojocaru, Crina; Akozbek, Neset; Coppens, Zachary; Pérez Salinas, Daniel; Wall, Simon; Trull Silvestre, José Francisco (International Society for Photo-Optical Instrumentation Engineers (SPIE), 2020)
      Text en actes de congrés
      Accés obert
      We report a comparative experimental and theoretical study of second harmonic generation from a 20nm-thick indium tin oxide nanolayer in the proximity of the epsilon-near-zero condition. We record the efficiency of the ...

    • Spatiotemporal imaging of 2D polariton wave packet dynamics using free electrons 

      Kurman, Yaniv; Dahan, Raphael; Shenfux, Hanan Herzig; Wang, Kangpeng; Yannai, Michael; Adiv, Yuval; Reinhardt, Ori; Tizei, Luiz H. G.; Woo, Steffi Y.; Li, Jiahan; Edgar, James H.; Kociak, Mathieu; Koppens, Frank H. L.; Kaminer, Ido (AAAS, 2021-06-11)
      Article
      Accés obert

    • The cooperative IGS RT-GIMs: a reliable estimation of the global ionospheric electron content distribution in real time 

      Liu, Qi; Hernández Pajares, Manuel; Yang, Heng; Monte Moreno, Enrique; Roma Dollase, David; García Rigo, Alberto; Li, Zishen; Wang, Ningbo; Laurichesse, Denis; Zhao, Q.; Wübbena, Gerhard; Krankowski, Andrzej; Ghoddousi Fard, Reza; Blot, Alexis; Zhang, Qiang (2021-09-23)
      Article
      Accés obert
      The Real-Time Working Group (RTWG) of the International GNSS Service (IGS) is dedicated to providing high-quality data and high-accuracy products for Global Navigation Satellite System (GNSS) positioning, navigation, ...

    • Wakefield acceleration in planetary atmospheres: a possible source of MeV electrons : the collisionless case 

      Arrayas Chazeta, Manuel; Cubero Gómez, David; Montañá Puig, Juan; Seviour, Rebecca; Trueba Santander, Jose Luis (2018-07-01)
      Article
      Accés obert
      Intense electromagnetic pulses interacting with a plasma can create a wake of plasma oscillations. Electrons trapped in such oscillations can be accelerated under certain conditions to very high energies. We study the ...

    • X-rays from laboratory sparks in air: the relationship between runaway electrons and the electric field 

      March Nomen, Víctor; Montañá Puig, Juan; Romero Durán, David; Solà de las Fuentes, Glòria; Van der Velde, Oscar Arnoud (2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This article presents an experiment in which the gap distance was varied between 46 and 84 cm. Series of 15 voltage impulses were applied for each distance and different peak voltages with a rise time of 600 ns. The results ...