Gehrmann, ElkeElkeGehrmannJacob, ArneArneJacobBirtel, PhilipPhilipBirtelDürr, WolfgangWolfgangDürr2021-01-062021-01-062012-083rd ITG International Vacuum Electronics Workshop (2012)http://hdl.handle.net/11420/8305enFilter Helices for Traveling Wave TubesConference PaperOther