[1] Boyd T J, Rogers B T, Tesche R R. PHERMEX—A high-current electron accelerator for use in dynamic radiography[J]. Rev Sci Instrum, 36, 1401-1408(1965).

[2] Scarpetti R D, Boyd J K, Earley G G, et al. Upgrades to the LLNL flash Xray induction linear accelerat (FXR)[C]11th IEEE International Pulsed Power Conference — Digest of Technical Papers. 1997, 12: 597–602.

[5] Briesmeister J F. MCNP – A general Monte Carlo Nparticle transpt code – Version 4C[R]. LA13709M, 2000.

[6] Agostinelli S, Allison J, Amako K. Geant4 – a simulation toolkit[J]. Nuclear Instruments and Methods in Physics Research Section A – Accelerators Spectrometers Detectors and Associated Equipment, 506, 250-303(2003).

[7] Kawrakow I, Rogers D W O. The EGSncr code system: Monte Carlo simulation of electron photon transpt[R]. Ottawa: National Research Council of Canada, 2002.

[9] Muller K H. Measurement acterization of Xray spot size[R]. LAUR891886, 1989.

[10] Ekdahl C. Characterizing flash-radiography source spots[J]. Journal of the Optical Society of America A, 28, 2501-2509(2011).