000K utf8 1100 2021$c2021-11-03 1500 eng 2050 urn:nbn:de:gbv:27-dbt-20230725-122017-000 2051 10.1088/1367-2630/ac3048 3000 Kettle, B 3010 Alejo, A 3010 Astbury, S 3010 Baird, C 3010 Bohlen, S 3010 Campbell, M 3010 Colgan, C 3010 Dannheim, D 3010 Gerstmayr, E 3010 Gregory, C 3010 Harsh, H 3010 Hatfield, P 3010 Hinojosa, J 3010 Hollatz, D 3010 Katzir, Y 3010 Mangles, S P D 3010 Morton, J 3010 Murphy, C D 3010 Nurnberg, A 3010 Osterhoff, J 3010 Pérez-Callejo, G 3010 Põder, K 3010 Rajeev, P P 3010 Roedel, C 3010 Roeder, F 3010 Rose, S J 3010 Salgado, F C 3010 Samarin, G M 3010 Sarri, G 3010 Seidel, A 3010 Spannagel, S 3010 Spindloe, C 3010 Steinke, S 3010 Streeter, M J V 3010 Thomas, A G R 3010 Underwood, C 3010 Watt, R 3010 Zepf, M 4000 A laser–plasma platform for photon–photon physics: the two photon Breit–Wheeler process [Kettle, B] 4060 19 Seiten 4209 We describe a laser–plasma platform for photon–photon collision experiments to measure fundamental quantum electrodynamic processes. As an example we describe using this platform to attempt to observe the linear Breit–Wheeler process. The platform has been developed using the Gemini laser facility at the Rutherford Appleton Laboratory. A laser Wakefield accelerator and a bremsstrahlung convertor are used to generate a collimated beam of photons with energies of hundreds of MeV, that collide with keV x-ray photons generated by a laser heated plasma target. To detect the pairs generated by the photon–photon collisions, a magnetic transport system has been developed which directs the pairs onto scintillation-based and hybrid silicon pixel single particle detectors (SPDs). We present commissioning results from an experimental campaign using this laser–plasma platform for photon–photon physics, demonstrating successful generation of both photon sources, characterisation of the magnetic transport system and calibration of the SPDs, and discuss the feasibility of this platform for the observation of the Breit–Wheeler process. The design of the platform will also serve as the basis for the investigation of strong-field quantum electrodynamic processes such as the nonlinear Breit–Wheeler and the Trident process, or eventually, photon–photon scattering. 4950 https://doi.org/10.1088/1367-2630/ac3048$xR$3Volltext$534 4950 https://nbn-resolving.org/urn:nbn:de:gbv:27-dbt-20230725-122017-000$xR$3Volltext$534 4961 https://www.db-thueringen.de/receive/dbt_mods_00058142 5051 530 5550 Breit–Wheeler 5550 laser–plasma 5550 LWFA 5550 pair production 5550 photon–photon 5550 QED