Title :
Direct observation of space charge evolution in e-irradiated Kapton films
Author :
Cals, Marie-Pierre ; Marque, J.P. ; Alquie, Claude
Author_Institution :
Office Nat. de´´Etudes et de Recherches Aerospatiales, Chatillon, France
Abstract :
The pressure wave propagation method has been applied to analyze the evolution of the space charge in e-irradiated Kapton H films. The 125 μm thick films are irradiated in a vacuum chamber with a monoenergetic electron beam in the 10-50 keV energy range. The method allows the direct observation of the depth of penetration of electrons. First results on Kapton are presented. The space charge evolution in the irradiation and nonirradiated regions is studied during and after the irradiation process. Trapped electrons drift in the nonirradiated zone towards the electrode interface where they build up. Positive charges appear in the bulk of the sample both in the irradiated and nonirradiated regions
Keywords :
electrets; electron beam effects; polymer films; space charge; 125 micron; Kapton films; depth of penetration; electret; electron beam irradiation; electrons drift; monoenergetic electron beam; pressure wave propagation method; space charge evolution; Charge measurement; Current measurement; Electrodes; Electron beams; Electron traps; Metallization; Polymer films; Pressure measurement; Space charge; Space vehicles;
Conference_Titel :
Electrets, 1991. (ISE 7) Proceedings., 7th International Symposium on (Cat. No.91CH3029-6)
Conference_Location :
Berlin
Print_ISBN :
0-7803-0112-9
DOI :
10.1109/ISE.1991.167240
