Fig. 2: Schematic view of the detection system.

The beam particles 14C (red line) are tracked by three parallel plate avalanche chambers (PPACs). x stands for up or down for the telescopes T1x(T2x), and equals to 1, 2 or 3 for the annular telescopes TAx. The telescopes are composed of double-sided silicon strip detectors (DSSDs) of W1 or BB7 type, annular double-sided silicon strip detectors (ADSSDs), large-size silicon detectors (SSDs), and CsI(Tl) scintillators. The final particles of interest are illustrated by the red arrows.