"http://www.isvav.cz/projectDetail.do?rowId=GAP209/11/1412"^^ . "dust charging electron and ion emissions"@en . . . . "2011-01-01+01:00"^^ . "2015-12-31+01:00"^^ . . "GAP209/11/1412" . "0"^^ . . . . "0"^^ . . . . "1"^^ . . . . "Space bodies (i.e., dust) are exposed to the series of processes that influence its total charge (surface potential, respectively). Among them, photoemission, attachment of electrons and ions, all kinds of secondary emissions, field emissions, are most important. The intent of the present project is to study these processes via laboratory simulation. Currently, we are working with the experiment based on a 3D quadrupole trap which is able to hold a single dust grain for a long time period. The trapped grain is then exposed to electron/ion/UV beams. Concurrently, we perform experiments in another set-up which is based on a completely different geometry of the trap that allows a broader access to the observed object for beam operation and optical detection.We suppose to study space dust simulants as well as reference samples. The expected results will be widely applicable in the space dust research, e.g., for the Moon lander mission where dismantling charged dust from moving parts is important technical issue. The study will be confronted with fundamental theories of aforementioned processes, with their numerical simulations, and last but not least, with the results of the material research. Since each surface in the space could be of a broad range of temperatures, one of our aims is to control (reduce) the temperature of our traps down to liquid nitrogen and to study thermal effects."@en . . . . . "2014-04-18+02:00"^^ . "10"^^ . "2015-04-23+02:00"^^ . . "10"^^ . "Vesm\u00EDrn\u00E9 objekty (tj. i prach) jsou vystaveny p\u016Fsoben\u00ED \u0159ady proces\u016F, kter\u00E9 ovliv\u0148uj\u00ED jejich celkov\u00FD n\u00E1boj, resp. jejich povrchov\u00FD potenci\u00E1l. Mezi tyto procesy pat\u0159\u00ED p\u0159edev\u0161\u00EDm fotoemise, z\u00E1chyt elektron\u016F a~iont\u016F, sekund\u00E1rn\u00ED emise, emise ve vlastn\u00EDm elektrick\u00E9m poli a dal\u0161\u00ED. Navrhovan\u00FD projekt se zab\u00FDv\u00E1 laboratorn\u00ED simulac\u00ED t\u011Bchto mechanism\u016F. V sou\u010Dasn\u00E9 dob\u011B disponujeme experiment\u00E1ln\u00EDm za\u0159\u00EDzen\u00EDm, kter\u00E9 je zalo\u017Eeno na principu 3D kvadrup\u00F3lov\u00E9 pasti, kter\u00E1 dovoluje zachytit jedno prachov\u00E9 zrnko a vystavit ho p\u016Fsoben\u00ED svazku \u010D\u00E1stic. Sou\u010Dasn\u011B prob\u00EDhaj\u00ED experimenty s novou past\u00ED s v\u00FDrazn\u011B odli\u0161nou geometri\u00ED, kter\u00E1 umo\u017E\u0148uje v\u00FDrazn\u011B v\u011Bt\u0161\u00ED p\u0159\u00EDstup (pro svazky, opticky) ke zkouman\u00E9mu objektu. P\u0159edpokl\u00E1d\u00E1me studium analog\u016F vesm\u00EDrn\u00E9ho prachu a \u0159ady dal\u0161\u00EDch referen\u010Dn\u00EDch vzork\u016F. O\u010Dek\u00E1v\u00E1me, \u017Ee na\u0161e v\u00FDsledky najdou \u0161irok\u00E9 uplatn\u011Bn\u00ED ve fyzice kosmick\u00E9ho prachu, nap\u0159. ohledn\u011B nab\u00EDjen\u00ED prachov\u00FDch zrn na povrchu M\u011Bs\u00EDce, kde tento p\u016Fsob\u00ED nemal\u00E9 technick\u00E9 pot\u00ED\u017Ee pro povrchov\u00E9 moduly. Pozorov\u00E1n\u00ED budou srovn\u00E1na s fundament\u00E1ln\u00EDmi teoriemi zm\u00EDn\u011Bn\u00FDch proces\u016F, jejich numerick\u00FDmi modely a v neposledn\u00ED \u0159ad\u011B s v\u00FDsledky materi\u00E1lov\u00E9ho v\u00FDzkumu. Jeliko\u017E povrchy ve vesm\u00EDru mohou m\u00EDt teploty v \u0161irok\u00E9 \u0161k\u00E1le hodnot, jedn\u00EDm z na\u0161ich c\u00EDl\u016F je umo\u017Enit regulaci (chlazen\u00ED) na\u0161ich sou\u010Dasn\u00FDch past\u00ED a\u017E na teplotu kapaln\u00E9ho dus\u00EDku a ur\u010Dit tak vliv teploty na zmi\u0148ovan\u00E9 procesy." . . "Prach a jeho nab\u00EDjen\u00ED v kosmick\u00FDch podm\u00EDnk\u00E1ch: Laboratorn\u00ED simulace" . "Dust and its charging in the space: Laboratory simulations"@en .