Archives par mot-clé : positron
Production of positron using gamma from Bremsstralhung
A 10GeV mono energetic electron beam (with au gaussian distribution in x and y -in root : gRandom->Gaus(0,2.5e-3)/sqrt(2.)-) impinging on 0.1 cm amorphous tungsten produced gamma with this phase space (yield=#gamma/#e-=138966/50000~2.78) Those gamma are using to produce positron by impinging … Continuer la lecture
Hybrid source: positrons distribution
(Robert Chehab’s graphic and summary) In the following we took: For both case (10 GeV and 5 GeV) the inital x and y electron distribution follow (ROOT syntax) x=gRandom->Gaus(0,2.5e-3)/sqrt(2.); // gaussian centered x=0 with rms_x=2.5mm y=gRandom->Gaus(0,2.5e-3)/sqrt(2.); // gaussian centered y=0 … Continuer la lecture
Production of polarised positron using Bremsstralhung
Initial parameters : e- beam 80-50 MeV normal incidence, stat. 10^6 100% longitudinal electron polarisation S(0,0,1) Tungsten target of 1×X0 = 3.5 mm (Z=74, ρ = 19.3 g/cm3) Positron Yield = Ne+/Ne- ~ 15 % Energy deposited in the tungsten … Continuer la lecture