P. Picchi

Design of the ZEPLIN II Detector

We will discuss the detailed design of the ZEPLIN II detector, to be installed in the Boulby Mine, UK, for the direct detection of WIMP dark matter. Based on the liquid xenon (Xe) R&D work carried out at CERN by UCLA and Torino, which measures ionization and scintillation simultaneously in two-phase Xe, ZEPLIN-II will have very high radioactive-background rejection efficiency. We will describe in detail the technology and the design considerations. The ZEPLIN-II detector will be operated in collaboration with the UKDMC, Columbia University, and CNR Torino.

Measurement of Scintillation Amplification in a Xenon Detector with a CsI-Luminescence Plate

We describe the work of the UCLA-Torino team at CERN, which uses a two-phase xenon (Xe) detector with a CsI internal photo cathode. We describe a powerful method for amplifying photons in the WIMP detector. With this setup, one photoelectron produces more than 180 luminescent photons, but taking CsI quantum efficiency into account, the overall amplification factor of at least 10 was achieved using the CsI internal photo cathode. This method will provide enough photons in the chamber for maximum detection efficiency. It will also maximize the powerful background discrimination of the detector to search for supersymetric (SUSY) dark matter.

ZEPLIN II and Amplification of Primary Scintillation

We will discuss the detailed design of the 30 kg two-phase xenon ZEPLIN II detector, to be installed in the Boulby mine, UK in early 2001, for the direct detection of WIMP dark matter. Xenon provides many advantages for WIMP searching. Also we will describe a possible primary amplification method with Csl internal photo cathode. We achieved more than 10 times amplification ratio for a initial photon. This method will maximize the efficiency of ZEPLIN II to search for Super-Symmetric Dark Matter.

ICARUS. A novel detector for proton decay and neutrino searches at the LNGS

Abstract The ICARUS project aims at building a large mass (5 ktons) liquid Argon TPC at the LNGS to study proton decay as well as neutrino oscillations. The detector provides detailed images of ionizing events together with their energy measurement and particle identification. These capabilities allow for the exclusive measurement of the proton decay events and a highly sensitive neutrino oscillations experiment.

The ICARUS experiment: status & program

The 3 ton liquid argon time projection chamber for the ICARUS project has been in operation since May 1991 collecting events from cosmic rays and monocromatic gamma ray source. Recent results are reported as well as an overview of the possible physics applications of this promising technique.

ICARUS: a neutrino observatory at the Gran Sasso laboratory

Abstract We report on neutrino physics with the ICARUS detector. Extensive Montecarlo simulations have shown that the neutrino physics programme is particularly well suited for the innovative detection technique of the ICARUS experiment.

ICARUS liquid argon time projection chamber - A complete imaging detector

Recent operation results of a three-ton liquid argon time projection chamber for the ICARUS project are reported. This elecronic continually sensitive, self-triggering bubble-chamber is capable of providing 3D imaging of any ionizing event in conjunction with a good calorimetric response.