Positron production using a 9 MeV electron linac for the GBAR experiment
نویسندگان
چکیده
For the GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment CERN’s Antiproton Decelerator (AD) facility we have constructed a source slow positrons, which uses low-energy electron linear accelerator (linac). The driver linac produces electrons 9 MeV kinetic energy that create positrons from bremsstrahlung-induced pair production. Staying below 10 ensures no persistent radioactive activation in target zone and radiation level outside biological shield is safe for public access. An annealed tungsten-mesh assembly placed directly behind acts as positron moderator. system 5×107 per second, performance demonstrating superior choice over positron-emitting sources high flux.
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ژورنال
عنوان ژورنال: Nuclear Instruments and Methods in Physics Research
سال: 2021
ISSN: ['1872-9576', '0168-9002']
DOI: https://doi.org/10.1016/j.nima.2020.164657