The COMPASS Experiment at CERN

The COMPASS experiment makes use of the CERN SPS high-intensitymuon and hadron beams for the investigation of the nucleon spin structure and the spectroscopy of hadrons. One or more outgoing particles are detected in coincidence with the incoming muon or hadron. A large polarized target inside a superconducting solenoid is used for the measurements with the muon beam. Outgoing particles are detected by a two-stage, large angle and large momentum range spectrometer. The setup is built using several types of tracking detectors, according to the expected incident rate, required space resolution and the solid angle to be covered. Particle identification is achieved using a RICH counter and both hadron and electromagnetic calorimeters. The setup has been successfully operated from 2002 onwards using a muon beam. Data with a hadron beam were also collected in 2004. This article describes the main features and performances of the spectrometer in 2004; a short summary of the 2006 upgrade is also given.Comment: 84 papes, 74 figure

The study of metal oxidation process when metal is exposed to waste products of farm animals

The article is devoted to the study of the corrosion process rate of steel parts in livestock and poultry buildings, primarily, dung removers, which are operated and exposed to a chemically aggressive environment. The issues of metal loss of parts which are in contact with waste products of cattle, pigs and poultry are considered. The results of the influence of corrosion processes on loosening torque increase of the threaded joints of dung removing equipment for livestock and poultry farms are also presented. The research results can be used in design and repairs of farm dung removers