This is the title of your presentation at the conference in bold Arial size 14 with only the first word capitalized First Author,1 Second Author,2,3 Times New Roman1,2 1 2 Times New Roman, Italic University, Size 12 Physics Department, University of Colorado, Boulder, CO 80309 3 LASP, University of Colorado, Boulder, CO 80303 Contact.Author@include.email.address.edu Abstract. Limit length to one page. The text is single line spaces with Times New Roman size 12 and the paragraph justified. Figures (see below) and equations are welcome, but not required. References1 go to the bottom of the page as footnotes. The solar Vacuum Ultraviolet (VUV; < 200 nm) radiation induces photoemission from the surface of the Moon, Mercury and other airless celestial bodies. This process charges the surface positively and generates a near-surface photoelectron plasma sheath. Solar activity is highly variable in the 70-100 nm range where the photoelectron yield peaks. Available data for high-resolution solar UV spectra and lunar grain photoelectric yield are combined to calculate the variation of photoelectron emission with solar activity. The results show that extreme solar flare conditions can increase photoelectron emission several fold. The consequence of higher photoelectron current is increased surface potential and stronger electric field that is likely to increase the electrostatic mobilization of lunar dust. 80 Ni Probe current [A] 60 40 Al 20 0 -10 -8 -6 -4 -2 0 2 Probe bias [V] 1 F. Author, S. Author, T. N. Roman, J. Phys. Dusty Plasmas 1, 101 (2009). 4