Studies of the 'Experimental Particle Physics Group'

The working program of the 'Experimental Particle Physics Group' (EPPG) will be presented. The group's program contains the experimental verification of the Standard Model for the elementary particles interactions. The participation of the EPPG in different collaborations is discussed. It began with the contributions to the L3 collaboration on the tracker construction as well as to the MC simulation of different reactions in the electron-positron interactions at LEP with a CMS energy of 190-209 GeV. The participation in the strange particle electroproduction experiment in electron-nucleus interactions at Thomas Jefferson Laboratory Accelerator. The group activities in the construction of the CMS detector at CERN LHC (14 TeV p-p interaction) machine, by manufacturing in Romania a series of dummy detectors for different tests as well as the contributions to the radiation hardness studies of the silicon detector are mentioned. Finally, the participation in the AMS 1-2 cosmic is presented. The results obtained in the prototype AMS 1 flight are discussed from the physical as well as technical point of view. As a principal physical result, an upper limit of 1.1 x 10-6 of the ratio antihelium/helium in cosmic rays was found. Technically, a series of improvements in comparison with the flown prototype were considered. The change in magnet from a permanent to a superconducting one was decided and the change and modification of the detection systems was proposed. At the end some considerations are made about the construction and schedule of the AMS 2 detector complex to be installed on the ISS space station in 2005. (authors)