Institut de recherche sur les lois fondamentales de l'Univers

We present the development of a thin large area tracking detector. The thickness of matter intercepted by the ions is 
approximately 0.25 mg/cm² of low mass material (aluminized Mylar). It is designed to detect low energy heavy ions with 
a minimum of energy and angular straggling. We use a secondary electron emission foil coupled to an innovative large 
area gaseous electron detector. The electrons are guided toward the detector by an electric and a magnetic field. 
We achieve good time (300 psec FWHM) and two dimensional position (1.4 mm FWHM) resolutions over a large 
area (10x40 cm²).