Nuclear Track Detectors for Particle Searches
  In this paper we report a search for intermediate mass magnetic monopoles and nuclearites using CR39 and Makrofol Nuclear Track Detectors (NTDs) of the SLIM large area experiment, 440 m^2 exposed at the high altitude laboratory of Chacaltaya (Bolivia) and about 100 m^2 at Koksil, Himalaya (Pakistan). We discuss the new chemical etching and improved analysis of the SLIM CR39 sheets. Preliminary limits are based on 316 $m^2$ of CR39 NTDs exposed for 3.9 y. 
S. Manzoor, S. Balestra, M. Cozzi, M. Errico, G. Giacomelli, M.   Giorgini, A. Kumar, A. Margiotta, E. Medinaceli, L. Patriz...