Working on the floor at CDF

Josh Helsper, left, and Donovan Tooke pose in front of some cryogenics on the floor of the CDF assembly hall. Helsper is an intern with SIST this summer and attends NIU. Tooke is an alumnus of SIST and is currently a crew chief in the Accelerator Division. Photo: Elliott McCrory, people

Josh Helsper, left, and Donovan Tooke pose in front of some cryogenics on the floor of the CDF assembly hall. Helsper is an intern with SIST this summer and attends NIU. Tooke is an alumnus of SIST and is currently a crew chief in the Accelerator Division. Photo: Elliott McCrory