6533b828fe1ef96bd1288e83
RESEARCH PRODUCT
Positron production using a 9 MeV electron linac for the GBAR experiment
B. RadicsAlexei VoroninL. DoddS. NiangBruno MansoulieFerdinand Schmidt-kalerValery NesvizhevskyP.-p. CrépinPaul IndelicatoA. HussonK.-h. YooT. KosinskiB. LataczA. WelkerEun-san KimP. DebuLaszlo LiszkayAndré RubbiaJ. RzadkiewiczR. NishiPierre CladéD. LunneyG. JankaY. SacquinPaolo CrivelliD. P. Van Der WerfO. RousselleJaison LeeJ.-m. ReyD. WonB.h. KimPaul-antoine HervieuxNaofumi KurodaS. WolfP. LotrusE. LimP. PérezGiuseppe MornacchiJean-philippe KarrJean-philippe KarrO. D. DalkarovM. CharltonC. RegenfusS. Guellati-khélifaS. NourbakshSerge ReynaudA. DouilletA. DouilletSvante JonsellJ.-m. ReymondS. K. KimF. NezJ.-y. RousséM. StaszczakK.h. ParkGiovanni ManfrediHyo-suk LeeJj ChoiYoung Ju KoM. MatusiakN. PaulLaurent HilicoLaurent HilicoMoses ChungS. WronkaB. TuchmingYasunori YamazakiK. LévêqueB. VallageT LouvradouxP. CominiA. M. M. LeiteS. Procureursubject
safetyAntimatterNuclear and High Energy PhysicsCERN LabPhysics - Instrumentation and DetectorstungstenPositronAstrophysics::High Energy Astrophysical PhenomenaFOS: Physical sciencesElectron01 natural sciences7. Clean energyLinear particle acceleratorpositron: particle source010305 fluids & plasmaselectron: pair productionNuclear physicselectron: linear acceleratorPositronPositron; Linear accelerator; Antimatter; Antihydrogen; Gravitation0103 physical sciences[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]Detectors and Experimental TechniquesNuclear Experiment010306 general physicsAntihydrogenphysics.ins-detInstrumentationenergy: lowantihydrogenPhysicsLarge Hadron Collidergravitation 2Instrumentation and Detectors (physics.ins-det)linear acceleratorAntiproton DeceleratorPair productionradioactivityAntimattergravitation: accelerationPhysics::Accelerator PhysicsHigh Energy Physics::Experimentperformancepositron: yieldGravitationdescription
For the GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment at CERN's Antiproton Decelerator (AD) facility we have constructed a source of slow positrons, which uses a low-energy electron linear accelerator (linac). The driver linac produces electrons of 9 MeV kinetic energy that create positrons from bremsstrahlung-induced pair production. Staying below 10 MeV ensures no persistent radioactive activation in the target zone and that the radiation level outside the biological shield is safe for public access. An annealed tungsten-mesh assembly placed directly behind the target acts as a positron moderator. The system produces $5\times10^7$ slow positrons per second, a performance demonstrating that a low-energy electron linac is a superior choice over positron-emitting radioactive sources for high positron flux.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2020-06-10 | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment |