Abstract
The ORNL facility for heavy-ion simulation of neutron damage is described. Two accelerators are operated simultaneously to propel two or three ion beams on the target under well-controlled conditions. The beams are generated continuously or in a pulsed mode. The heavy-ion beam is focused and analyzed in a unique way while the simultaneous light-ion beam is energy-ramped periodically to produce a more favorable implantation profile. Measurements of such profiles as well as beam compositions are presented and their significance discussed. The target normally consists of nine electron microscopy specimens whose temperature can be adjusted from 400–850 °C and accurately measured and controlled. The ultrahigh vacuum target chamber accomodates up to 54 TEM specimens at a single loading. The vacuum environment can be characterized by a partial pressure analysis. An example of the use of the facility for studying radiation damage of stainless steel is presented.
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