2 sujets IRFU/DACM

Dernière mise à jour : 29-11-2020


• Accelerators physics

 

ADVANCED AND ARTIFICIAL INTELLIGENCE TECHNIQUES TO MITIGATE LINEAR AND NON-LINEAR IMPERFECTIONS IN FUTURE CIRCULAR COLLIDERS

SL-DRF-21-0279

Research field : Accelerators physics
Location :

Département des Accélérateurs, de Cryogénie et de Magnétisme (DACM)

Laboratoire d’Etudes et de Développements pour les Accélérateurs (LEDA)

Saclay

Contact :

Barbara Dalena

Starting date : 01-10-2021

Contact :

Barbara Dalena
CEA - DRF/IRFU/DACM


Thesis supervisor :

Barbara Dalena
CEA - DRF/IRFU/DACM


Personal web page : http://dalena.web.cern.ch/dalena/

Laboratory link : http://irfu.cea.fr/dacm/index.php

After the discovery of the Higgs boson at the LHC, particle physics community is exploring and proposing next accelerators, to address the remaining open questions on the underlying mechanisms and on the constituents of the present universe. One of the studied possibilities is FCC (Future Circular Collider), a 100-km-long collider at CERN. The hadron version of FCC (FCC-hh) seems to be the only approach to reach energy levels far beyond the range of the LHC, in the coming decades, providing direct access to new particles with masses up to tens of TeV. The electron version of FCC brings a tremendous increase of production rates for phenomena in the sub-TeV mass range, making precision physics studies possible. A first study has shown no major showstopper in the colliders’ feasibility but has identified several specific challenges for the beam dynamics: large circumference (civil engineering constraints), beam stability with high current, the small geometric emittance, unprecedented collision energy and luminosity, the huge amount of energy stored in the beam, large synchrotron radiation power, plus the injection scenarios. This thesis will focus on the optimization of the hadron option of the future circular collider against linear and non-linear imperfections (i.e. magnets alignments and their field quality). A key point of this thesis is the comparison of current advanced correction schemes to techniques based on machine learning. The application of these techniques to accelerators is one of current hot topics in the field and pursued worldwide.

Optimization of the booster for the electron-positron collider FCC-ee

SL-DRF-21-0083

Research field : Accelerators physics
Location :

Département des Accélérateurs, de Cryogénie et de Magnétisme (DACM)

Laboratoire d’Etudes et de Développements pour les Accélérateurs (LEDA)

Saclay

Contact :

Antoine CHANCE

Starting date : 01-11-2020

Contact :

Antoine CHANCE
CEA - DRF/IRFU/DACM/LEDA

(+33) 1 69 08 17 19

Thesis supervisor :

Antoine CHANCE
CEA - DRF/IRFU/DACM/LEDA

(+33) 1 69 08 17 19

Laboratory link : http://irfu.cea.fr/dacm/

More : https://home.cern/science/accelerators/future-circular-collider

Currently, one of the burning questions in particle physics is the understanding of the mass origin of the particles by exploring Higgs properties, more specifically its self-interaction. An electron-positron collider is then a powerful tool for precision physics. In this purpose, the project "Future Circular Collider Innovation Study" (FCCIS) aims to deliver a conceptual report and to give a sustainable implementation long-term plan for a 1OO-km-long electron-antielectron collider at CERN.

The PhD student will join an international collaboration with CERN, DESY, INFN or KIT. The PhD will focus on the booster, the ring which accelerates electrons up to nominal energy before injecting into the collider. The main challenges of the booster are

i) the injection energy. The PhD student will determine the optimum injection energy of the booster ; this choice will have a great impact on the injection complex and its cost

ii) the booster optics. the PhD student will have to explore different optics and propose innovative solutions to improve and boost equilibrium conditions.

iii) the injection into the collider. The PhD student will study how to inject into the ring and will design the transfer lines up to the collider.

The PhD student will use the MAD-X code for the optics calculations, a reference code developed at CERN.

 

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