Professor Robertson does laboratory experiments relating to dust in ionospheric and space plasma. Exploration activities on the surfaces of small moons expose robotic instrument to hazards from the dusty soil. The dust is exposed to solar UV and the solar wind causing charging of the dust particles which enhances dust transport. Laboratory experiments are aimed at understanding charging mechanisms in dusty plasma environments. There are smoke particles in the ionosphere from the ablation of meteors that collect charge and create dusty plasmas. These particles are probably the nucleation sites for mesospheric clouds. Professor Robertson continues to develop rocket payloads for launch into the polar mesosphere to determine the location and charge to mass ratio of these particles.
"Experiments on dust transport in plasma to investigate the origin of the lunar horizon glow," Wang, X., M. Horányi, and S. Robertson (2009), J. Geophys. Res., 114, A05103, doi:10.1029/2008JA013983.
"Lunar Dust Levitation," J. E. Colwell, S. R. Robertson, M. Horanyi, X. Wang, A. Poppe, and P. Wheeler, Journal of Aerospace Engineering 22, pp. 2-9 (2009).
"Variability of the lunar photoelectron sheath and dust mobility due to solar activity," Z. Sternovsky, P. Chamberlin, M. Horanyi, S. Robertson and X. Wang, J. Geophys. Res. 113, doi:10.1029/2008JA013487, 2008.
"Plasma probes for the lunar surface," X. Wang, M. Horanyi and S. Robertson, J. Geophys. Res., 113, A08108, doi:10.1029/2008JA013187, 2008.
"A laboratory model of the lunar surface potential near boundaries between sunlit and shadowed regions," X. Wang, M. Horányi, Z. Sternovsky, S. Robertson, and G. E. Morfill (2007), Geophys. Res. Lett., 34, L16104, doi:10.1029/2007GL030766 (5 pages).
"Lunar surface: Dust dynamics and regolith mechanics," J. E. Colwell, S. Batiste, M. Horányi, S. Robertson, and S. Sture, Rev. Geophys., 45, RG2006, doi:10.1029/2005RG000184, 2007 (26 pages).
"Charge of dust on surfaces in plasma," X. Wang, J. Colwell, M. Horanyi and S. Robertson, IEEE Trans. on Plasma Sci. 35(2), pp. 271-279, April 2007.
"Rocket-borne in situ measurements of meteor smoke: Charging properties and implications for seasonal variation," Rapp, M., I. Strelnikova, B. Strelnikov, P. Hoffmann, M. Friedrich, J. Gumbel, L. Megner, U.-P. Hoppe, S. Robertson, S. Knappmiller, M. Wolff and D. Marsh, Journal of Geophysical Research 115, D00I16, doi:10.1029/2009JD012725 (20 pages) 2010.
"Large mesospheric ice particles at exceptionally high altitudes," L. Megner, M. Khaplanov, G. Baumgarten, J. Gumbel, J. Stegman, B. Strelnikov and S. Robertson, Annales Geophysicae 27, 943-951, 2009.
"Signatures of Mesospheric Particles in Ionospheric Data," M. Friedrich, K.M. Torkar, W. Singer, I. Strelnikova, M. Rapp, and S. Robertson, Annales Geophysicae 27, 823-829, 2009.
"Mass analysis of charged aerosol particles in NLC and PMSE during the ECOMA/MASS campaign," S. Robertson, M. Horányi, S. Knappmiller, Z. Sternovsky, R. Holzworth, M. Shimogawa, M. Friedrich, K. Torkar, J. Gumbel, L. Megner, G. Baumgarten, R. Latteck, M. Rapp, U.-P. Hoppe and M. E. Hervig, Annales Geophysicae 27, 1213-1232, 2009.
"First in situ measurement of the vertical distribution of ice volume in a mesospheric ice cloud during the ECOMA/MASS rocket-campaign," M. Rapp, I. Strelnikova, B. Strelnikov, R. Latteck, G. Baumgarten, Q. Li, L. Megner, J. Gumbel, M. Friedrich, U.-P. Hoppe, and S. Robertson, Annales Geophysicae 27, 755-766, 2009.
"A rocket-borne mass analyzer for charged aerosol particles in the mesosphere," S. Knappmiller, S. Robertson, Z. Sternovsky and M. Friedrich, Rev. Sci. Instrum. 79, 104502 (2008); doi:10.1063/1.2999580.
"Continuous gas discharge plasma with 200 K electron temperature," S. Dickson and S. Robertson, Physics of Plasmas 17, 033508, (5 pages) 2010.
"Sheath and presheath in plasma with warm ions, S. Robertson, Physics of Plasmas 16, 103503 (6 pages), 2009.
"A hot-filament discharge with very low electron temperature," Ward Handley and Scott Robertson, Physics of Plasmas 16, 016702 (2009).
"Energy balance and plasma potential in low-density hot-filament discharges," Scott Robertson, Scott Knappmiller and Zoltan Sternovsky, IEEE Trans. Plasma Sci. 34(3), pp. 844-849, June 2006.