Dynamic Response of Graphitic Targets with Tantalum Cores Impacted by Pulsed 440-GeV Proton Beams

Figure 14

Recorded radial surface velocity (solid blue line) and calculated damping envelope (red dashed line) as a function of time for 100 and 200 μs after beam impact. (a–c) Compares two different carbon-fiber reinforced graphite composite and graphitic foam: #4 SGL Premium PyC (a), #7 ArianeGroup Sepcarb (b), and #3 POCO FOAM (c) at 1 × 10¹¹ ppp (top) and 6 × 10¹¹ ppp (bottom) pulse intensity. The energy density provided in each plot indicates the peak energy deposition in the tantalum core averaged over the length of the sample. The perturbations in (c) are nonperiodic.

(a)

(b)

(c)