Design and implementation of a non-magnetic cryogenic multi-conductor vacuum feedthrough

Abstract

A : A common issue for experiments requiring very low magnetic fields on vacuum and cryogenic systems is how to deal with the control of magnetic properties of electrical contacts. We describe the design and implementation of a generic sixty-four pin non-magnetic cryogenic vacuum feedthrough capable of disconnecting contacts on both sides of the vacuum boundary. K: Cryogenics, Detector design and construction technologies and materials A X P : 1805.06048

Electric dipole moments and the search for new physics

“…The nEDM@SNS experiment uses challenging technologies involving large-scale cryogenic systems (for the current experimental design, see Ahmed et al [149]). Considerable results have been obtained from the R&D efforts in all areas, including: polarized 3 He [170][171][172][173][174][175][176], dressed spins [177][178][179], magnetic field monitoring [180], non-magnetic feedthrough [181], SQUID based magnetometers [182], noble gas scintillation and its detection [183][184][185][186][187][188], electrical breakdown in LHe [150,151], HV generation in superfluid helium [189], cryogenic magnetic field studies [190], possible systematic effects [127,155,157,159,160,[191][192][193][194], and apparatus for studying spin dressing and systematic effects [138]. The SNS project is the only project making use of a superconducting shield, meaning it will not be affected by intrinsic fluctuations in the room temperature ferromagnetic shields, a technology which has not been tested at sensitivities below 10 −26 e • cm, and is relied on by all the other nEDM projects discussed above.…”