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By Jens Dilling, Reiner Krücken, Lia Merminga
The TRIUMF Isotope Separator and Accelerator (ISAC) facility makes use of the isotope separation online (ISOL) strategy to produce rare-isotope beams (RIB). The ISOL procedure includes a main creation beam, a target/ion resource, a mass separator, and beam delivery approach. The infrequent isotopes produced throughout the interplay of the proton beam with the objective nucleus are stopped within the bulk of the objective fabric. They diffuse contained in the goal fabric matrix to the outside of the grain after which effuse to the ion resource the place they're ionized to shape an ion beam that may be separated through mass after which guided to the experimental amenities. formerly released within the magazine Hyperfine Interactions.
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Extra resources for ISAC and ARIEL: The TRIUMF Radioactive Beam Facilities and the Scientific Program
Example text
Number from 1 to 10, 1 being 1 in 103 cycle and 10 is a failure that arises once every running period. The ease of detection (D) to prevent the failure is given a number from 1 to 10, 1 being easy to detect the failure and 10 being very difficult. The product of S*O*D represents the risk priority given for that failure mode. From there we can decide on the criticality of that particular failure mode and recommend action or proceed to a design modification. All changes are recorded using the Engineering Change Order (ECO) associated with the action.
1 First ARIEL beam, phase-I The ARIEL project has to be built in phases, the first phase being a 100 kW, 25 MeV electron beam on a target. The electron beam will impinge onto a converter made of water cooled Ta discs; an Al disc placed after the converter will stop the remaining electrons before they can reach the target. The target stations, shielding, hot-cells, storage vault, front ends and mass separator are not part of the initial funding agreement Since most of the services required to operate actinide target will not be present in the first phase it is advantageous to consider using a non actinide target to do the ARIEL target and front end commissioning.
The operating temperature and the p+ beam current were limited to 1100 ◦ C and 15 μA, respectively. At this temperature the effusion of carbon from the target is only feasible with the formation of molecules such as CO. As shown in Fig. 3, the measured yields of molecular CO+ beams are about one order of magnitude higher than the yields of atomic C+ beams, which are most likely the result of CO breakup in the plasma source. Because of the relatively poor thermal conductivities of oxides, p+ intensities on such targets are expected to be limited to ∼20 μA with the existing passive radiatively cooled target containers.