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Sökning: WFRF:(Gudmundsson Jon Tomas) > Non-Maxwellian elec...

LIBRIS Formathandbok  (Information om MARC21)
FältnamnIndikatorerMetadata
00003589naa a2200457 4500
001oai:DiVA.org:kth-221000
003SwePub
008180111s2018 | |||||||||||000 ||eng|
0247 a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2210002 URI
0247 a https://doi.org/10.1088/1361-6595/aaa06b2 DOI
040 a (SwePub)kth
041 a engb eng
042 9 SwePub
072 7a ref2 swepub-contenttype
072 7a art2 swepub-publicationtype
1001 a Giono, Gabrielu KTH,Rymd- och plasmafysik,Leibniz-Institute of Atmospheric Physics, Germany4 aut0 (Swepub:kth)u1x7qapw
2451 0a Non-Maxwellian electron energy probability functions in the plume of a SPT-100 Hall thruster
264 c 2017-12-27
264 1b Institute of Physics (IOP),c 2018
338 a print2 rdacarrier
500 a QC 20180111
520 a We present measurements of the electron density, the effective electron temperature, the plasma potential, and the electron energy probability function (EEPF) in the plume of a 1.5 kW-class SPT-100 Hall thruster, derived from cylindrical Langmuir probe measurements. The measurements were taken on the plume axis at distances between 550 and 1550 mm from the thruster exit plane, and at different angles from the plume axis at 550 mm for three operating points of the thruster, characterized by different discharge voltages and mass flow rates. The bulk of the electron population can be approximated as a Maxwellian distribution, but the measured distributions were seen to decline faster at higher energy. The measured EEPFs were best modelled with a general EEPF with an exponent a between 1.2 and 1.5, and their axial and angular characteristics were studied for the different operating points of the thruster. As a result, the exponent a from the fitted distribution was seen to be almost constant as a function of the axial distance along the plume, as well as across the angles. However, the exponent a was seen to be affected by the mass flow rate, suggesting a possible relationship with the collision rate, especially close to the thruster exit. The ratio of the specific heats, the. factor, between the measured plasma parameters was found to be lower than the adiabatic value of 5/3 for each of the thruster settings, indicating the existence of non-trivial kinetic heat fluxes in the near collisionless plume. These results are intended to be used as input and/or testing properties for plume expansion models in further work.
650 7a NATURVETENSKAPx Fysik0 (SwePub)1032 hsv//swe
650 7a NATURAL SCIENCESx Physical Sciences0 (SwePub)1032 hsv//eng
653 a EEPF
653 a Hall thruster
653 a plasma plume
653 a electric propulsion
7001 a Gudmundsson, Jon Tomasu KTH,Rymd- och plasmafysik,University of Iceland, Iceland4 aut0 (Swepub:kth)u1q27a34
7001 a Ivchenko, Mykolau KTH,Rymd- och plasmafysik4 aut0 (Swepub:kth)u12jw61z
7001 a Mazouffre, S.4 aut
7001 a Dannenmayer, K.4 aut
7001 a Loubere, D.4 aut
7001 a Popelier, L.4 aut
7001 a Merino, M.4 aut
7001 a Olentsenko, Georgiu KTH,Rymd- och plasmafysik4 aut0 (Swepub:kth)u1195vi6
7102 a KTHb Rymd- och plasmafysik4 org
7730 t Plasma sources science & technologyd : Institute of Physics (IOP)g 27:1q 27:1x 0963-0252x 1361-6595
8564 u https://e-archivo.uc3m.es/bitstream/10016/28513/1/non_maxwellian_PSST_2017_ps.pdf
8564 8u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-221000
8564 8u https://doi.org/10.1088/1361-6595/aaa06b

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