The Fed has these auctions but it auctions them off at what price the public will pay, so the Fed doesn't determine the term structure.

联储局公开拍卖债券,但只有当公众愿意以特定价格支付时,这些债券才能成交,所以联储局不能决定期限结构

耶鲁公开课 - 金融市场课程节选