No abstract available

[en] A target for implosion by ion beams composed of a spherical shell of frozen DT surrounded by a low-density, low-Z pusher shell seeded with high-Z material, and a high-density tamper shell. The target has various applications in the inertial confinement technology. For certain applications, if desired, a low-density absorber shell may be positioned between the pusher and tamper shells

[en] A novel device for versatile sputtering applications is described. The apparatus design is realised for fulfilling the demands of both nuclear physics experiment target production and serial sectioning in solid-state diffusion studies with radiotracers. Results of several tests are reported, characterising the devise performance in these two differing applications

[en] The supersonic compression of hollow spheres driven by intense ion beams is quantitatively estimated for the so-called cannonball targets

[en] The results of 2-D computer simulation of high-power light and heavy ion beams targets interaction are presented. The extreme states and dynamics of shock-waves and high velocity jet formation are described

[en] The authors have used the Jet Vapor Deposition (JVD) method to produce a target with 350 layers of Ti¹⁵N backed by carbon (1,000 A each). And 7.6 MeV proton beams (< 55 μ Amps) from the Louvain-La-Neuve CYCLON30, to produce secondary radioactive ¹⁵O beams using the ¹⁵N(p,n)¹⁵O reaction. The ¹⁵O nuclei are stopped in the carbon layers and produce CO molecules that are readily extracted from the hot foil and collected in a cryogenic getter for counting of the β⁺ decay. The authors measure an extraction efficiency of approximately 15%, limited by target meltdown. Hence they project a production of ¹⁵O secondary radioactive beams at least a factor of 100 better than could be obtained with the use of the ¹²C(α,n)¹⁵O reaction. They continue their effort to improve target resilience and better extraction efficiency, as well as produce thicker foils with approximately 5,000 layers (1mm)

[en] We describe the status of a distributed radiator heavy ion target design. In integrated calculations this target ignited and produced 390-430 MJ of yieldwhen driven with 5.8-6.5 MJ of 3-4 GeV Pb ions. The target has cylindrical symmetry with disk endplates. The ions uniformly illuminate these endplates in a 5mm radius spot. We discuss the considerations which led to this design together with some previously unused design features: low density hohlraum walls in approximate pressure balance with internal low-Z fill materials, radiationsymmetry determined by the position of the radiator materials and particle ranges, and early time pressure symmetry possibly influenced by radiation shims. We discuss how this target scales to lower input energy or to lower beam power. Variant designs with more realistic beam focusing strategies are also discussed. We show the tradeoffs required for targets which accept higher particle energies

No abstract available

[en] Since the yield strength of a metal foil decreases rapidly at high temperatures, the working pressure of a radiogas target is limited by the maximum temperature of the isolation foil. Forced gas convection cooling is used to augment the conduction and radiative heat transfer. This paper explores the heat transfer processes of a double window heat pipe, a non-mechanical and sealed device. The analysis is concerned with the effect of the heat pipe phenomena of capillary head, vapor velocity and entrainment on the foil cooling

[en] In order to initiate ignition and substantial energy yield from an inertial confinement fusion target (ICF), a light-ion pulse of ∼700 TW peak power and 15--20 ns duration is required. The preconceptual design presented here provides this power. The HERMES-III technology of linear inductive voltage addition in a self-magnetically insulated transmission line (MITL) is utilized to generate the 25--36 MV peak voltage needed for lithium ion beams. The 15--20 MA ion current is achieved by utilizing many accelerating modules in parallel. The lithium ion beams are produced in two-stage extraction diodes. To provide the two separate voltage pulses required by the diode, a triaxial adder system is incorporated in each module. The accelerating modules are arranged symmetrically around the fusion chamber in order to provide uniform irradiation onto the ICF target.In addition, the modules are fired in a preprogrammed sequence in order to generate the optimum power pulse shape onto the target. In this paper we present an outline of the LMF accelerator conceptual design with emphasis on the architecture of the accelerating modules