Up Close: ANOREM, Six Laboratories Devoted to Materials Research
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aterials Research
MRS BULLETIN/JULY1990
61
Up Close: ANOREM, Six Laboratories Devoted to Materials Research
very much. However, this field is of great interest since it deals with the basic knowledge of how the atomic structure accommodâtes electronic excitations (hère in the bulk, as opposed to the laser case which concerns only surfaces) as well as with the practical interest in induced damage by fission products or cosmic rays. Induced effects in insulators are well known and appear as cylindrical perturbed zones around the ion path called "latent tracks." Two main features underline the results obtained at QRIL by différent research teams: First, a gênerai microscopic description of the latent tracks has been given for a large range of electronic stopping powers. Second, it has been demonstrated that, even in a metallic target, amorphous as well as crystallized (Figure 1), the electronic excitations induce damage in the structure. The research tapies cover many différent materials such as metals (pure iron, gallium,1 NiZr, NiTi, Cu3Au, steels, organic metals, amorphous alloys), high Tc superconductors, 2 semiconductors (Si, Ge, HgCdTe1, np diodes), and insulators (Si0 2 , A1203, polymers, magnetic oxides2). Facilities For materials research, a facility called IRABAT has been set up on one of the GANIL beam Unes. IRABAT allows homogeneous irradiation of geometrically welldefined target areas up to 30 x 30 mm2, at températures monitored between 10 K and 600 K with a continuous and précise measurement of the beam intensity. For the low température irradiation (
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