Abstract.  An overview of the experimental activities on high energy density in matter in progress at ITEP is given for the period last few years. The development of ITEP-TWAC facility, recent results of diagnostics of shock-wave process and detonation studies in condensed matter by proton radiog-raphy method[1] and development of the RF wobbler system for shaping of hollow heavy ion beam on the target[2] are emphasized.

In recent years studies of shock and detonation wave phenomena at extreme dynamic condi-tions were performed at proton radiography facility developed at the 800 MeV proton beam line of ITEP-TWAC. The facility provides a multi-frame imaging capability at 50 µm spatial and 70 ns temporal resolution. The results of latest studies conducted there are presented, including results on explosion and detonation of pressed and emulsion high explosives, shock-induced dense non-ideal plasma of argon and xenon and shock loading of non-uniform metal surfaces[3].

Intense heavy ion beam is an efficient tool to generate high energy density states in macroscopic amounts of matter. As result it enables to study astrophysical processes in the laboratory under controlled and reproducible conditions. For advanced experiments in high energy density physics the cylindrical target irradiated by hollow cylindrical beam is required. A new method for RF rotation of the ion beam is applied for the formation of the required hollow beam. The RF system consisting of two four-cell H-mode cavities with a resonant frequency of 297 MHz was chosen. According to simulations and analytical models this frequency is sufficient for uniform target illumination at a power deposition level of about 10 TW/g. The RF rotation system will be placed in the beam transport line at a distance from the target, which is equal to one quarter wave-length of the transverse beam oscillations. The design of the rotation system and layout of the target – rotation system and focusing elements are presented.

References:
[1]  S.A.Kolesnikov, A.A.Golubev, V.S.Demidov, S.V.Dudin, A.V.Kantsyrev, V.B.Mintsev, G.N.Smirnov, V.I.Turtikov, A.V.Utkin, B.Y.Sharkov, V.E.Fortov. Application of charged particle beams of TWAC-ITEP accelerator for diagnostics of high dynamic pressure processes. High Pressure Research, Volume 30, Issue 1, 2010, pp. 83 - 87.
[2] S.Minaev, N.Alexeev, D.H.H.Hoffmann, T.Kulevoy, B.Sharkov, A.Sitnikov, N.A.Tahir, D.Varentsov. Heavy ion hollow beam formation at the energy of 1 AGeV for implosion experiments using an original RF system for fast rota-tion. Nuclear Instruments and Methods in Physics Research A 620 (2010) 99–104.
[3] A.A. Golubev, V.S. Demidov, E.V. Demidova, S.V. Dudin, A.V. Kantsyrev, S.A. Kolesnikov, V.B. Mintsev, G.N. Smirnov, V.I. Turtikov, A.V. Utkin, V.E. Fortov, B.Y. Sharkov. Diagnostics of fast processes by charged particle beams at TWAC-ITEP accelerator-accumulator facility // Technical Physics Letters, 2010, V.36, I.2, P.177-180.