TY - JOUR

T1 - A cryogenic radio-frequency ion trap for quantum logic spectroscopy of highly charged ions

AU - Leopold, T.

AU - King, S. A.

AU - Micke, P.

AU - Bautista-Salvador, A.

AU - Heip, J. C.

AU - Ospelkaus, C.

AU - Crespo López-Urrutia, J. R.

AU - Schmidt, P. O.

N1 - Funding information: The authors gratefully thank Julia Fenske for the design and manufacturing of the electronics required for operation of the trap. We acknowledge the PTB scientific instrumentation department 5.5 headed by Frank Löffler for their expertise and fabrication of numerous parts, including the cryogenic environment; in particular, we thank Michael Müller and Stephan Metschke. We thank the PTB surface technology laboratory and Manuel Stompe from IMPT Hannover for their technical help with manufacturing of the ion trap. We thank the MPIK mechanical apprentice workshop headed by Stefan Flicker for fabrication of parts. Financial support was provided by Physikalisch-Technische Bundesanstalt, Max-Planck-Gesellschaft zur Förderung der Wissenschaften e. V., and Deutsche Forschungsgemeinschaft through Grant No. SCHM2678/5-1, and Collaborative Research Centers’ Grant No. SFB 1227 (DQ-mat), Project Nos. A01 and B05, as well as Grant No. SFB 1225 (ISO-QUANT), Project No. B01. S.A.K. acknowledges support by the Alexander von Humboldt Foundation. This project has received funding from the European Metrology Programme for Innovation and Research (EMPIR) co-financed by the participating states and from the European Union’s Horizon 2020 research and innovation programme (Project No. 17FUN07 CC4C).

PY - 2019/7

Y1 - 2019/7

N2 - A cryogenic radio-frequency ion trap system designed for quantum logic spectroscopy of highly charged ions (HCI) is presented. It includes a segmented linear Paul trap, an in-vacuum imaging lens, and a helical resonator. We demonstrate ground state cooling of all three modes of motion of a single 9Be+ ion and determine their heating rates as well as excess axial micromotion. The trap shows one of the lowest levels of electric field noise published to date. We investigate the magnetic-field noise suppression in cryogenic shields made from segmented copper, the resulting magnetic field stability at the ion position and the resulting coherence time. Using this trap in conjunction with an electron beam ion trap and a deceleration beamline, we have been able to trap single highly charged Ar13+ (Ar XIV) ions concurrently with single Be+ ions, a key prerequisite for the first quantum logic spectroscopy of a HCI. This major stepping stone allows us to push highly-charged-ion spectroscopic precision from the gigahertz to the hertz level and below.

AB - A cryogenic radio-frequency ion trap system designed for quantum logic spectroscopy of highly charged ions (HCI) is presented. It includes a segmented linear Paul trap, an in-vacuum imaging lens, and a helical resonator. We demonstrate ground state cooling of all three modes of motion of a single 9Be+ ion and determine their heating rates as well as excess axial micromotion. The trap shows one of the lowest levels of electric field noise published to date. We investigate the magnetic-field noise suppression in cryogenic shields made from segmented copper, the resulting magnetic field stability at the ion position and the resulting coherence time. Using this trap in conjunction with an electron beam ion trap and a deceleration beamline, we have been able to trap single highly charged Ar13+ (Ar XIV) ions concurrently with single Be+ ions, a key prerequisite for the first quantum logic spectroscopy of a HCI. This major stepping stone allows us to push highly-charged-ion spectroscopic precision from the gigahertz to the hertz level and below.

UR - http://www.scopus.com/inward/record.url?scp=85070108735&partnerID=8YFLogxK

U2 - 10.1063/1.5100594

DO - 10.1063/1.5100594

M3 - Article

C2 - 31370455

AN - SCOPUS:85070108735

VL - 90

JO - Review of scientific instruments

JF - Review of scientific instruments

SN - 0034-6748

IS - 7

M1 - 073201

ER -