Assertion: circular accelerator | /r/HasProperty | built in tunnel
Facets:
value: to minimize the disruption
type: PURPOSE
value: to minimize cost
type: PURPOSE
value: invariably
type: MANNER
Source sentences:
text: Very large circular accelerators are invariably built in tunnels a few metres wide to minimize the disruption and cost of building such a structure on the surface, and to provide shielding against intense secondary radiations that occur, which are extremely penetrating at high energies.