With less than a week to go before a state-of-the-art European particle collider makes the one in Batavia, Ill., a relic, scientists at Fermilab are testing ways of using the new facility from half a world away. Fermilab researchers on Thursday showed off the Chicago-area lab’s high-tech communications links to the new Switzerland-based Large Hadron Collider, which is set to begin test operations Sept. 10. The remote operations center, the only one of its kind in the U.S., is a major part of the American lab’s strategy to ride an expected wave of discoveries from the European device.