Positron sources are the key elements for the future and current lepton collider projects such
as ILC, CLIC, SuperKEKB, FCC-ee, Muon Collider/LEMMA, etc., introducing challenging …

An intense positron sources is a demanding element in the design of future lepton colliders.
A crystal-based hybrid positron source could be an alternative to a more conventional …

The KEKB injector linac has been continuously improved to enhance the stability of many
devices and the efficiency of beam operation. These improvements include the development …

A new tungsten single-crystal target has been successfully employed at the positron source
of the KEKB injector linac. The crystal thickness was determined to be 10.5 mm based on …

A new kind of positron sources for future linear colliders, where the converter is an aligned
tungsten crystal, oriented on the〈 111〉-axis, has been studied at CERN in the WA103 …

The FCC-ee is a high-luminosity, high-precision circular collider to be constructed in a new
100 km tunnel in the Geneva area. The physics case is well established and the FCC-ee …

The positron source under investigation is using channeling radiation of multi-GeV electrons
in a tungsten crystal. The radiated photons are im**ing on the amorphous targets creating …

In a conventional positron source driven by a few GeV electron beam, a high amount of heat
is loaded into a positron converter target to generate intense positrons required by linear …

We measured positron-production efficiency from an axially-oriented single crystal target by
8-GeV channeling electrons at the KEK electron/positron injector linac. The targets tested …

A non-conventional positron source using the intense γ radiation from an axially oriented
monocrystal which materializes into e+ e− pairs in a granular amorphous converter is …