| Autor: |
J.R.J. Bennett, V. Panteleev, GR Murdoch, Chris Densham, W.R. Evans, M Holding, P. V. Drumm |
| Rok vydání: |
1997 |
| Předmět: |
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| Zdroj: |
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms. 126:117-120 |
| ISSN: |
0168-583X |
| DOI: |
10.1016/s0168-583x(97)01082-3 |
| Popis: |
A description is given of the detailed development of the high power RIST (Radioactive Ion Source Test) tantalum foil target, designed to produce intense beams of radioactive ions using the 800 MeV proton beam of the pulsed neutron source, ISIS. The target dissipates ∼30 kW at the design proton current of 100 μA. There are severe difficulties in dissipating this power in the small target volume, whilst aiming to maintain a uniform surface temperature of ∼2000°C. The thermal problems, the tests and the solutions are discussed. The heat is dissipated by thermal radiation from the surface whose emissivity is enhanced by fins. Computer calculations of the radiated power are compared with experimental values. The internal geometry of the target is also dominated by the thermal requirements, resulting in a structure of thin tantalum discs. The manufacture of the target from nearly 6000 discs and spacer washers of 0.0025 cm thick tantalum foil by diffusion bonding into a rigid vacuum tight component has been a considerable achievement. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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