An in-beam curved crystal spectrometer facility has been installed at the SIN variable energy cyclotron. The radius of curvature is 3.15 m. Using the (110) planes of different bent quartz laminas, diffraction peaks down to ∆θ = 5 arcsec FWHM are obtained. The energy resolution is thus ∆E ⋍ 0.01 E 2/n , where n is the diffraction order, ∆E being expressed in eV and E in keV. The spectrometer has been constructed to cover an angular range of ±10°. Transitions in the range 17 to about 350 keV have so far been observed. Measurements have been performed in conventional line source DuMond geometry and in slit geometry. The instrument is being used for the high-resolution observation of X- and gamma-rays induced by proton, helium- and oxygen-ion bombardment.