Exploració per autor "Coello de Portugal-Martinez Vazquez, Jaime Maria"

Ara es mostren els items 1-8 de 8

    • Experimental validation of the Achromatic Telescopic Squeezing (ATS) scheme at the LHC 

      Fartoukh, Stephane; Bruce, Roderik; Carlier, Felix; Coello de Portugal-Martinez Vazquez, Jaime Maria; Garcia-Tabares, Ana; Maclean, Ewen Hamish; Malina, Lukas; Mereghetti, Alessio; Mirarchi, Daniele; Persson, Tobias; Pojer, Mirko; Ponce, Laurette; Skowronski, Piotr; Redaelli, Stefano; Salvachua, Belen; Camillocci, Matteo Solfaroli; Tomas García, Rogelio; Valuch, Daniel; Wegscheider, Andreas; Wenninger, Jorg (Institute of Physics (IOP), 2017-07-27)
      Article
      Accés obert
      The Achromatic Telescopic Squeezing scheme offers new techniques to deliver unprecedentedly small beam spot size at the interaction points of the ATLAS and CMS experiments of the LHC, while perfectly controlling the chromatic ...

    • Impact of flux jumps in future colliders 

      Coello de Portugal-Martinez Vazquez, Jaime Maria; Tomas García, Rogelio; Fiscarelli, Lucio; Gamba, Davide; Martino, Michele (American Physical Society (APS), 2020-01-02)
      Article
      Accés obert
      Type-II superconductors, like the Nb3Sn used in the new HL–LHC quadrupole triplet and 11 T dipoles or FCC dipoles, are known to show an unstable behavior during magnetic-field ramps. This paper presents an analysis of the ...

    • Improving the precision of linear optics measurements based on turn-by-turn beam position monitor data after a pulsed excitation in lepton storage rings 

      Malina, Lukas; Coello de Portugal-Martinez Vazquez, Jaime Maria; Persson, Tobias; Skowronski, Piotr; Tomas García, Rogelio; Franchi, Andrea; Liuzzo, Simone (American Physical Society (APS), 2018-08-04)
      Article
      Accés obert
      Beam optics control is of critical importance for machine performance and protection. Nowadays, turn-by-turn (TbT) beam position monitor (BPM) data are increasingly exploited as they allow for fast and simultaneous measurement ...

    • LHC optics commissioning: A journey towards 1% optics control 

      Persson, Tobias; Carlier, Felix; Coello de Portugal-Martinez Vazquez, Jaime Maria; Garcia-Tabares, Ana; Langner, Andy; Maclean, Ewen Hamish; Malina, Lukas; Skowronski, Piotr; Salvant, Benoit; Tomas García, Rogelio; Garcia Bonilla, Alba-Carolina (American Physical Society (APS), 2017-06-19)
      Article
      Accés obert
      Since 2015 the LHC has been operating at 6.5 TeV. In 2016 the ß -functions at the interaction points of ATLAS and CMS were squeezed to 0.4 m. This is below the design ß * = 0.55 ¿ ¿ m at 7 TeV, and has been instrumental ...

    • Local optics corrections in the HL-LHC 

      Coello de Portugal-Martinez Vazquez, Jaime Maria (Universitat Politècnica de Catalunya, 2021-06-16)
      Tesi
      Accés obert
      In order to increase the performance of particle colliders, it is crucial to make the beam sizes at the collision points as small as possible. This causes an increase of the beam size in the region surrounding the collision ...

    • New approach to LHC optics commissioning for the nonlinear era 

      Maclean, Ewen Hamish; Tomas García, Rogelio; Carlier, Felix; Camillocci, Matteo Solfaroli; Dilly, Joschua; Coello de Portugal-Martinez Vazquez, Jaime Maria; Fol, Elena; Fuchsberger, Kajetan; Giovannozzi, Massimo; Hofer, Michael; Malina, Lukas; Persson, Tobias; Skowronski, Piotr; Wegscheider, Andreas (American Physical Society (APS), 2019-06-21)
      Article
      Accés obert
      In 2017, optics commissioning strategy for low- ß * operation of the CERN Large Hadron Collider (LHC) underwent a major revision. This was prompted by a need to extend the scope of beam-based commissioning at high energy, ...

    • New local optics measurements and correction techniques for the LHC and its luminosity upgrade 

      Coello de Portugal-Martinez Vazquez, Jaime Maria; Tomas García, Rogelio; Hofer, Michael (American Physical Society (APS), 2020-04-06)
      Article
      Accés obert
      As the beams at the interaction points (IPs) of circular colliders are pushed toward smaller sizes, the correction of the magnetic field errors in high- ß regions become increasingly important, but also challenging. This ...

    • Utilizing the N beam position monitor method for turn-by-turn optics measurements 

      Langner, Andy; Benedetti, Gabriele; Carla, Michele; Iriso, Ubaldo; Coello de Portugal-Martinez Vazquez, Jaime Maria; Tomas García, Rogelio; Marti, Zeus (American Physical Society (APS), 2016-09-21)
      Article
      Accés obert
      The N beam position monitor method ( N -BPM) which was recently developed for the LHC has significantly improved the precision of optics measurements that are based on BPM turn-by-turn data. The main improvement is due to ...