• L. Perrot
  IPNO/IN2P3/CNRS, Orsay
• S. Grévy, C. Houarner, R. Hue, C. Marry
  GANIL, Caen
• S.M. Lukyanov, Yu. Penionzhkevich
  JINR, Dubna

Physics that motivated the building of the LISE magnetic spectrometer, main ideas exposed in the scientific council of GANIL June 4th 1981 by M. Brian and M. Fleury, were: atomic physics studies with stripped ions and the study of new isotopes produced by the fragmentation of beams. The LISE line is a doubly achromatic spectrometer (angle and position), with a resolution better than 10^-3. Since the first experiment done in 1984, several improvements of the spectrometer were performed: use of a achromatic degrader (1987, used for the first time in the world), building of the achromatic deviation and the Wien Filter (1990), building of a new selection dipole and associated vertical platform (1994), building of the new LISE2000 line (2001), use of the CAVIAR detector (2002), building of the CLIM target (2007). Despite an extreme international competition, the LISE spectrometer remains a world-leader equipment using more than 50 % and up to 90 % of the beam time available at GANIL. This paper presents the status of CAVIAR detector which consists of a MWPC dedicated to in flight particle position at the first dispersive plane of LISE. Since two years, intensive efforts were done with the objective to make available a “plug and play” detector for nuclear physic experiment. We will describe the system from MWPC up to acquisition system. As example few experimental results will be presented.