Another potential troublemaker is the initiator, a small device at the center of the core that emits a burst of neutrons to start the chain reaction reliably at a precise stage of the implosion.

• 另一个可能的麻烦是启动器，这是位于核中心的一个小装置，会发射出中子，以确保在内爆时某个确切阶段启动连锁反应。