We present the dimensioning of a photon-photon collider based on Compton gamma sources for the observation of Breit-Wheeler pair production and QED γγ events. Two symmetric electron beams, generated by photocathodes and accelerated in linacs, produce two gamma ray beams through Compton back scattering with two J-class lasers. Tuning the system energy above the Breit-Wheeler cross section threshold, a flux of electron-positron pairs is generated out of light-light interaction. The process is analyzed by start-to-end simulations. Realistic numbers of the secondary particle yield, referring to existing state-of-the-art set-ups and a discussion of the feasibility of the experiment taking into account the background signal are presented.



Titolo: Matter from light-light scattering via Breit-Wheeler events produced by two interacting Compton sources
Autori: 
MILOTTI, EDOARDO
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Data di pubblicazione: 2017
Stato di pubblicazione: Pubblicato
Rivista: 
PHYSICAL REVIEW. ACCELERATORS AND BEAMS  
Abstract: We present the dimensioning of a photon-photon collider based on Compton gamma sources for the observation of Breit-Wheeler pair production and QED γγ events. Two symmetric electron beams, generated by photocathodes and accelerated in linacs, produce two gamma ray beams through Compton back scattering with two J-class lasers. Tuning the system energy above the Breit-Wheeler cross section threshold, a flux of electron-positron pairs is generated out of light-light interaction. The process is analyzed by start-to-end simulations. Realistic numbers of the secondary particle yield, referring to existing state-of-the-art set-ups and a discussion of the feasibility of the experiment taking into account the background signal are presented.
Handle: http://hdl.handle.net/11368/2900142
Digital Object Identifier (DOI): 10.1103/PhysRevAccelBeams.20.043402
URL: https://journals.aps.org/prab/abstract/10.1103/PhysRevAccelBeams.20.043402
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