title: Low magnetic Johnson noise electric field plates for precision measurement.
abstract: We describe a parallel pair of high voltage electric field plates designed and constructed to minimise magnetic Johnson noise. They are formed by laminating glass substrates with a commercially available polyimide (Kapton) tape, covered with a thin gold film. Tested in vacuum, the outgassing rate is less than 5 × 10-5mbar l/s. The plates have been operated at electric fields up to 8.3 kV/cm, when the leakage current is at most a few hundred pA. The design is discussed in the context of a molecular spin precession experiment to measure the permanent electric dipole moment of the electron.
authors.affiliation: Centre for Cold Matter, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom.
authors.forename: I M
authors.initials: IM
authors.lastname: Rabey
authors.affiliation: Centre for Cold Matter, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom.
authors.forename: J A
authors.initials: JA
authors.lastname: Devlin
authors.affiliation: Centre for Cold Matter, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom.
authors.forename: E A
authors.initials: EA
authors.lastname: Hinds
authors.affiliation: Centre for Cold Matter, Blackett Laboratory, Imperial College London, Prince Consort Road, London SW7 2AZ, United Kingdom.
authors.forename: B E
authors.initials: BE
authors.lastname: Sauer