"54"^^ . "Noise as Diagnostic Tool for Schottky and Could Electron Emission Cathodes"@en . . "54"^^ . "2009-12-31+01:00"^^ . "0"^^ . "GA102/07/0113" . . . . " 1/f noise" . . "\u0158e\u0161en\u00FD projekt se zab\u00FDval fluktuacemi v Schottkyho a studenoemisn\u00EDch katod\u00E1ch. Metodologie se sest\u00E1vala ze studia m\u011B\u0159iteln\u00FDch hodnot, jak\u00FDmi byly \u0161umov\u00E9 nap\u011Bt\u00ED nebo \u0161umov\u00FD proud a jejich spektr\u00E1ln\u00ED v\u00FDkonov\u00E9 hustoty v z\u00E1vislosti na teplot\u011B, osv\u011Btlen\u00ED nebo"@cs . " temperature stability" . . " Schottky emision" . . "The proposed project is dealing with up-to-date research topics of fluctuation phenomena in Schottky and cold-field emission cathodes. Methodology consists in experimental study of measurable quantities, as the noise voltage or current and theirs spectral density dependence on temperature, light illumination and electric field intensity. The main sources of noise are: 1/f noise, generation recombination noise with its component - RTS noise, shot and thermal noise. The 1/f noise is dominant in ultra low frequency range (mHz region). New experimental results of noise spectral density and the relation to charge carriers mean free path, its mobility, dependence on temperature and electric field intensity in this frequency range will be obtained. Achieving these results requires an electron source with the following ideal properties: Small source size, low electron emission energy spread, high brightness (beam current per solid angle), low noise and long-term stability, simple and low-cost"@en . . . "2009-04-22+02:00"^^ . "2015-01-22+01:00"^^ . "2007-01-01+01:00"^^ . "Diagnostika Schottkyho a studenoemisn\u00EDch katod pomoc\u00ED elektronick\u00E9ho \u0161umu" . "http://www.isvav.cz/projectDetail.do?rowId=GA102/07/0113"^^ . "Diagnostic" . . . . "."@en . "Diagnostic; quality; 1/f noise; Schottky emision; temperature stability; noise spectral density"@en . . . . . . " quality" . "0"^^ . . "1"^^ . "Navrhovan\u00FD projekt pojedn\u00E1v\u00E1 o nejnov\u011Bj\u0161\u00EDm v\u00FDzkumu fluktua\u010Dn\u00EDch jev\u016F v Schottkyho diod\u00E1ch a katod\u00E1ch\u00A0pou\u017Eiteln\u00FDch pro\u00A0studenou emisi elektron\u016F \u00A0v\u00A0elektrick\u00E9m poli. Metodika \u0159e\u0161en\u00ED spo\u010D\u00EDv\u00E1 v experiment\u00E1ln\u00EDm studiu\u00A0 m\u011B\u0159en\u00ED, jak nap\u011B\u0165ov\u00E9 tak proudov\u00E9 spektr\u00E1ln\u00ED hustoty \u0161umu v z\u00E1vislosti na teplot\u011B\u00A0\u00A0a intenzit\u011B elektrick\u00E9ho pole. Hlavn\u00EDmi zdroji \u0161umu jsou: 1/f \u0161um, genera\u010Dn\u011B - rekombina\u010Dn\u00ED G-R \u0161um se slo\u017Ekou \u0161umu RTS, v\u00FDst\u0159elov\u00FD a tepeln\u00FD \u0161um. V\u00A0oblasti ultra n\u00EDzk\u00FDch kmito\u010Dt\u016F (mHz) dominuje \u0161um typu 1/f. Spektr\u00E1ln\u00ED hustota \u0161umu je velice siln\u011B z\u00E1visl\u00E1 na teplot\u011B a elektrick\u00E9m poli. P\u0159i experiment\u00E1ln\u00EDm sledov\u00E1n\u00ED bude po\u010Det voln\u00FDch nosi\u010D\u016F n\u00E1boje \u0159\u00EDzen jednak elektrick\u00FDm polem, jednak osv\u011Btlen\u00EDm. Budou tak z\u00EDsk\u00E1ny experiment\u00E1ln\u00ED v\u00FDsledky spektr\u00E1ln\u00ED hustoty \u0161umu v\u00A0po\u017Eadovan\u00E9 kmito\u010Dtov\u00E9 oblasti. Dosa\u017Een\u00ED t\u011Bchto v\u00FDsledk\u016F vy\u017Eaduje elektronov\u00FD zdroj s n\u00E1sleduj\u00EDc\u00EDmi ide\u00E1ln\u00EDmi vlastnostmi: mal\u00E9 rozm\u011Bry, p\u0159esn\u00E1 fokusace svazku s\u00A0n\u00EDzk\u00FDm roz\u0161i\u0159ov\u00E1n\u00EDm elektronov\u00E9 emise, vysok\u00FD jas (intenzita elektronov\u00E9ho" . . .