Fig. 7
From: Low-energy spin-physics experiments with polarized beams and targets at the COSY storage ring
Schematic drawing of the PAX polarized target with the ABS in the vertical position, the storage cell on the ring axis, and the target diagnostic system in the horizontal position. The Target Gas Analyzer (TGA) determines the atomic to molecular fraction of the effusive beam from the storage cell, while the Breit–Rabi Polarimeter (BRP) measures the degree of polarization of the atomic sample