TY - JOUR A1 - Henkel, Carsten A1 - Poetting, Sierk A1 - Wilkens, Martin T1 - Loss and heating of particles in small and noisy traps N2 - We derive the time and loss rate for a trapped atom that is coupled to fluctuating fields in the vicinity of a room-temperature metallic and/or dielectric surface. Our results indicate a clear predominance of near-field effects over ordinary blackbody radiation. We develop a theoretical framework for both charged ions and neutral atoms with and without spin. Loss processes that are due to a transition to an untrapped internal state are included. Y1 - 1999 ER -