• 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.