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GSI Darmstadt, 3 ITEP Moscow,

By K. Weyrich, H. Wahl, A. Golubev, A. Kantzyrev, M. Kulish, S. Dudin, D. H. H. Hoffmann, B. Sharkov, V. Mintsev and Ipcp Chernogolovka


Strongly-coupled, non-ideal plasmas with Γ-parameters ≥1 in the density regime up to 10 22 e- /cm 3 and temperatures between 1-10 eV and their interaction with heavy ions beams are of interest for basic research in ICF and laboratory astrophysics. Especially a deviation from the Zeff 2 behaviour of the energy loss of the ions in the plasma is expected [1]. At the Z6 experimental area at GSI non-ideal plasmas can be created by shockwaves originating from the detonation of a high explosive, 360 mg Nitropenta (NP) or 55 g RDX. The shockwave compresses Xe-gas in a glass-tube and a plasma layer is formed infront of the schockfront that propagates through the target [2]. The experimental set-up completed in summer and commissioned in a test beam-time in August 2001 ressembles the one used at the ITEP Moscow for measurements with proton beams [3]. temperature Te are the shockwave velocity and initial Xe-gas pressure from which these two parameters can be calculated by a code developed at the ICP, Chernogolovka. The shockwave velocity was diagnosed by two methods, with a streak camera recording the light emission from the passage of the shock front through the glass tube. Additionally there is a fiber-optical system, consisting of 4 fibers with 300 µm core-diameter which are placed equidistantly in the fiber-holder along the glass tube Each fiber is connected to a photodiode and the signals from the photodiodes are recorded with a TDS 744 oscilloscope. The time-delay between the recorded light-signals on the oscilloscope enabled an online estimation of the shockwave velocity. Target-Nr. Pressure (bar) vsh (mm/µs) vsh (mm/µs)

Year: 2011
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