P. Green

The macro detector at the Gran Sasso Laboratory

Abstract The MACRO detector is presently under construction, its installation at Gran Sasso being planned to start in September 1987. It is a large area detector, the acceptance for isotropic particle fluxes being around 10 000 m 2 sr, designed to search for rare phenomena in the cosmic radiation. It makes use of three detection techniques: liquid scintillator counters, plastic streamer tubes, and track-etch. It will perform a search for GUT monopoles (or any supermassive charged penetrating particle), a survey of cosmic point sources of HE gammas and neutrinos, a systematic study of the penetrating cosmic ray muons, and will be sensitive to neutrino bursts from gravitational stellar collapses in the Galaxy.

Absolute measurement of the vertical cosmic ray muon intensity at 3-50 gev/c near sea level

Abstract An absolute measurement of the vertical cosmic ray muon intensity at 3–50 GeV/ c has been performed with a solid-iron magnetic spectrometer. Results agree in spectral character with those reported by the Durham group but are an average of 10% higher in intensity. Implications for calibrating the present generation of spectrometers are discussed.

First results from the MACRO experiment at the Gran Sasso Laboratory

Abstract The first physics results obtained with the MACRO detector in the underground Gran Sasso Laboratory are reported. Results were also obtained in conjunction with the EAS-TOP detector located on top of the Gran Sasso mountain.

Status report of the macro experiment at gran sasso

Abstract The half of the MACRO detector, a large area Monopole, Astrophysics, Cosmic Ray Observatory is nearly completed in Hall B of the Gran Sasso Laboratory. One supermodule is already taken data and the remainder will be activated in few months. A general overview of the MACRO detector, together with its physics capabilities as far as the search for point sources of high energy neutrino is concerned, will be presented.