[baking]

The demountable magnets for ARC are so the blanket and vacuum vessel can be swapped out as a whole unit for replacement during maintenance. SPARC has no blanket and will only be used for some thousands of ten second shots or the equivalent of a week or two of continuous operation. The magnets being unshielded will probably fail before the vacuum vessel does.

CFS will be building a lot more magnets, not only for SPARC but for other customers, physics experiments and medical equipment, so I expect they will be working on many additional features including demountable joints for ARC.

One of the early tests they did of the VIPER cable at the SULTAN test facility in Switzerland involved a joint formed by clamping the ends of two cables to a copper bar. It does show that resistive joints are possible with HTS cables, unlike LTS cables, but the actual configuration of a joint for a large magnet is obviously a different matter. Luckily they will have a few years to work on it.