Pumped helium system for cooling positron and electron traps to 1.2 K

Citation:

Wrubel J, Gabrielse G, Klothammer WS, Larochelle P, McConnell R, Richerme P, Grzonka D, Oelert W, Sefzick T, Zielinski M, Borbely JS, George MC, Hessels EA, Storry CH, Weel M, Mullers A, Walz J, Speck A. Pumped helium system for cooling positron and electron traps to 1.2 K . In: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2011 p. 232–240.