caa a22 4500 469077522 CHVBK 20180323132939.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF02507614 doi (NATIONALLICENCE)springer-10.1007/BF02507614 Operation of the EGA electron gun at high gas pressures [Elektronische Daten] [G. Cirri, M. Bianconi, F. Cordero, A. Bicci, M. Dobrowolny, C. Bonifazi] Summary: This paper presents experimental results on the effects of increasing gas pressure on electron gun operations. The electron gun used is the gun EGA which has been developed for the TSS-1 mission. Various gases have been used with pressures in the range from 10−6 to a few times 10−3 mbar. The measurements, taken in a vacuum chamber, show a steady increase in the slope of theI-V characteristics of the gun when the pressure is increased, as a consequence of ionization phenomena induced by the electron beam. Further measurements have been taken of the overall current on a target at some distance from the gun itself. An attempt is also made at a theoretical calculation of the effects observed, based on simplified models. Società Italiana di Fisica, 1992 Physics of the ionosphere nationallicence Cirri G. Proel Tecnologie, Firenze, Italia aut Bianconi M. Proel Tecnologie, Firenze, Italia aut Cordero F. Proel Tecnologie, Firenze, Italia aut Bicci A. Proel Tecnologie, Firenze, Italia aut Dobrowolny M. Istituto Fisica Spazio Interplanetario, C.N.R. Frascati, Italia aut Bonifazi C. ASI, Italia aut Il Nuovo Cimento C Kluwer Academic Publishers 15/2(1992-03-01), 203-217 0390-5551 15:2<203 1992 15 11543 https://doi.org/10.1007/BF02507614 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02507614 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cirri G. Proel Tecnologie, Firenze, Italia aut NATIONALLICENCE 700 1- Bianconi M. Proel Tecnologie, Firenze, Italia aut NATIONALLICENCE 700 1- Cordero F. Proel Tecnologie, Firenze, Italia aut NATIONALLICENCE 700 1- Bicci A. Proel Tecnologie, Firenze, Italia aut NATIONALLICENCE 700 1- Dobrowolny M. Istituto Fisica Spazio Interplanetario, C.N.R. Frascati, Italia aut NATIONALLICENCE 700 1- Bonifazi C. ASI, Italia aut NATIONALLICENCE 773 0- Il Nuovo Cimento C Kluwer Academic Publishers 15/2(1992-03-01), 203-217 0390-5551 15:2<203 1992 15 11543 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer