2023-07-062023-07-062002-06-22Abadjieva, E., Schut, H., Alba García, A., Escobar-Galindo, R., Veen, A.v. y Pimblott, S.M. (2002). The design of an electrostatic variable energy positron beam for studies of defects in ceramic coatings and polymer films. Applied Surface Science, 194 (1-4), 47-51. https://doi.org/10.1016/S0169-4332(02)00087-9.0169-4332 (Impreso)1873-5584 (online)https://hdl.handle.net/11441/147758Parte del número especial: 9th International Workshop on Slow Positron Beam Techniques for Solids and SurfacesAn electrostatic variable energy positron beam for studying defects in ceramic coatings, polymer films and MOS-devices is developed for operation in Doppler-broadening (DB) and positron annihilation lifetime (PAL) modes. In DB mode the implantation energy can be varied between 3 and 30 keV with a beam diameter on the target ranging from 0.4 to 0.5 mm FWHM. In PAL mode the start-signal is given by secondary electron emission from a 25 nm thin carbon foil placed in front of the target. After passing the foil the positron beam is focused on the target with a spot size of 2 mm FWHM at 1 keV down to 0.6 mm FWHM at 30 keV. The target chamber is equipped with an in situ four-point bending device for studying defects introduced by tensile and compressive stresses.application/pdf5engAttribution-NonCommercial-NoDerivatives 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-nd/4.0/Electrostatic positron beamDoppler-broadeningPositron lifetimeinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess10.1016/S0169-4332(02)00087-9