Speaker
Description
The ISIS Neutron and Muon Source has developed a new RF-driven H⁻ ion source to replace the caesiated Penning source in use since the 1980s. The new source operates without caesium and has achieved extracted beam currents of up to 18 mA. To increase the beam current further toward operational requirements, a passive caesium delivery system using Cs₂CrO₄ dispensers has been designed and integrated into the RF ion source. The system releases caesium by heating a Cs collar with the plasma, while forced-air cooling and thermocouples provide temperature control. This paper describes the design, materials, cooling approach, and manufacturing process used to convert the source to a caesiated configuration. Important design features include caesium distribution, thermal isolation between components, and cooling of the main flange. Future work will focus on commissioning the system and optimising caesium delivery for stable, high-current operation.
| Paper status | Resubmitted proceeding files received and assigned to an editor. Accepted by Submitter. |
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