Phase III (and maybe IV) of the SIMPLE dark matter search experiment at the LSBB

¹ Center for Nuclear Physics and Department of Physics, University of Lisbon, Av. Prof. Gama Pinto 2, 1649-003 Lisbon, Portugal
² Campus Tecnológico e Nuclear, Universidade Técnica de Lisboa, EN 10, 2686-953 Sacavém, Portugal
³ Laboratoire Souterrain à Bas Bruit, Apt 84400, France

^a Corresponding author: criodets@cii.fc.ul.pt

Abstract

with the recent conclusion of Phase II, SIMPLE has ended its use of Superheated Droplet Detectors (SDD) in the WIMP search effort. An in-progress Phase III comprises a transition to larger mass bubble chamber technology, using many of the lessons gained from the previous phase since the underlying physics is identical. We describe the progress of the activities, to include several ∼1 kg prototype chambers, each 4× the total Phase II active mass, which are undergoing testing, prior to a rescaling to a 50 kg capacity within a Phase IV modular 1 ton detector for a definitive astroparticle search effort.