Beam dynamics studies at cern proton synchrotron

Δυναμικές μελέτες της δέσμης στον επιταχυντή πρωτονίων στο cern (EL)

Beam dynamics studies at cern proton synchrotron (EN)

Καϊτατζή, Μυρσίνη (EL)

Kaitatzi, Myrsini (EN)

ntua (EL)

Maltezos, Stavros (EN)

Gazis, Evangelos (EN)

Alexopoulos, Theo (EN)

bachelorThesis

2021-02-26

2021-09-06T09:40:13Z

High-energy physics research has always been the driving force behind the development of particle accelerators. For this reason it was necessary to go to even higher energies. he main parameter which needs to get maximized is the luminosity. Luminosity depends on the number of particles per bunch (n1,n2), the bunch transverse size at the interaction point and the bunch collision rate (f). Luminosity L is given: L=f n1n2 /4πσxσy The need of higher energy and higher intensity beams leads scientists to conceive new upgrade projects. The accelerators of the injector complex gave a decisive contribution to the excellent performance of the Large Hadron Collider (LHC) during its first run, which finished in February 2013, and was crowned with the discovery of the Higgs boson. The injectors had provided many different types of beams over a wide range of intensities, emittances and distances between bunches, which were crucial for safely commissioning. To reach the high luminosity, the CERN injector complex has to generate higher brightness and intensity beams. To this end, the Proton Synchrotron Booster (PSB), the PS and the Super Proton Synchrotron (SPS) are upgraded and consolidated and LINAC4 is constructed, during Long Shutdown 2 (LS2). The Large Hadron Collider (LHC) is one of the largest scientific instruments ever built. To sustain its performance, the LHC will need a major upgrade in the 2020s. This will increase its instantaneous luminosity (rate of collisions). The goal of LHC Injectors Upgrade (LIU) project is to make the injectors capable of delivering reliably the beams required by the HL-LHC. For the production of the future HL-LHC (High Luminosity LHC) type beams, major upgrades are needed to eliminate the existing limitations, in particular related for example to space-charge. Proton Synchrotron (PS) plays an important role in the production of the beams for the Large Hadron Collider (LHC), as its goal is to preserve at maximum the transverse emittances defined by its injector, the PS Booster (PSB). The current 1.4 GeV CERN PS injection energy limits the maximum intensity required by the future High-Luminosity LHC. The bare machine large chromaticity combined with the non-linear space charge forces make high-brightness and high-intensity beams cross betatron resonances along the injection flat bottom, inducing in this way transverse emittance blow-up and beam losses. This Master thesis work has been carried out at CERN in the framework of the LHC (Large Hadron Collider) Injector upgrade (LIU) program. Experiments were carried out in order to identify the existing betatronic resonances of Proton Synchrotron (PS) by applying a large emit- tance, not space-charge dominated beam on a magnetic flat bottom at constant energy, leading to the observation of the tune diagrams. The results of measurements will be presented in this thesis. (EL)

Πρωτόνια (EL)

Δίπολα (EL)

Συχνότητες (EL)

Συντονισμοί (EL)

Επιταχυντές (EL)

Accelerators (EN)

Working point (EN)

Resonances (EN)

Proton synchrotron (EN)

Beam dynamics (EN)

Αγγλική γλώσσα

Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Εφαρμοσμένων Μαθηματικών και Φυσικών Επιστημών. Τομέας Φυσικής (EL)

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National Technical University of Athens

Digital Library of National Technical University of Athens | Dspace@NTUA

Κεντρική Βιβλιοθήκη Ε.Μ.Π.

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