Energy deposition of superpinched relativistic electron beams in aluminum targets
Dynamic response data, which traditionally have been used to obtain equation-of-state (EOS) information of materials, were instead used here to study energy deposition of an intense (~1011 W/cm2) tightly focused relativistic electron beam (REB). Measurements of the REB-induced shock-wave transit time and average rear-surface velocity were compared with two-dimensional hydrodynamic calculations which contain well-known EOS information for 6061-T6 aluminum. The experimental results were consistent with classical electron deposition, i.e., a one-dimensional Monte Carlo transport calculation. In addition, peak pressures in the range 1–2 Mbar (0.1–0.2 TPa) were implied. Two anomalous effects were observed: (i) a low-amplitude (free-surface velocity ~104 cm/sec) precursor signal, preceding the REB-induced shock wave and (ii) a velocity distribution of material behind the rear surface of the target following the arrival of the REB-induced shock wave.
- Research Organization:
- Sandia Laboratories, Albuquerque, New Mexico 87115
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-33-021811
- OSTI ID:
- 4065056
- Journal Information:
- J. Appl. Phys., v. 47, no. 1, pp. 127-134, Journal Name: J. Appl. Phys., v. 47, no. 1, pp. 127-134; ISSN JAPIA
- Country of Publication:
- United States
- Language:
- English
Similar Records
High-precision measurements of the equation of state of hydrocarbons at 1-10 Mbar using laser-driven shock waves