Fig. 5: Schematic view of the experimental setup.
From: Breakup of the proton halo nucleus 8B near barrier energies

The upstream and downstream parallel plate avalanche counters (PPACs) are denoted as the PPACa and PPACb, respectively. Ten silicon detector telescopes surround the 120Sn target, arranged in a spherical shape with a radius around 70 mm. To demonstrate clearly, only the first layers of the silicon detector array are displayed.