Radioactive ion beam line in Lanzhou

Radioactive ion beam line in Lanzhou (RIBLL) has been constructed for the p roduction of short-lived radioactive nuclei and studies of exotic nuclei fa r from the beta-stability line. It has been put into operation recently at the National Laboratory of Heavy Ion accelerator Lanzhou. RIBLL consists of two doubly achromatic parts with a solid acceptance Delta Omega greater th an or equal to 6.5 msr, momentum acceptance Delta p/p = +/-5% and maximum m agnetic rigidity B rho(max) = 4.2 Tm. The second part of RIBLL serving as a spectrometer gives an element resolution Z/Delta Z > 150 and mass resoluti on A/Delta A > 300. The polarized secondary beams can be obtained by using a swinger dipole magnet to change the incident direction of primary project ile from 0 degrees to 5 degrees. The shortest lift time for secondary beams on RIBLL is less than 1 mu s. First experiments were performed with neutro n rich nuclei for understanding the properties of halo nuclei and exotic nu clear reactions.