TY - JOUR

T1 - A high-precision segmented Paul trap with minimized micromotion for an optical multiple-ion clock

AU - Pyka, Karsten

AU - Herschbach, Norbert

AU - Keller, Jonas

AU - Mehlstäubler, Tanja E.

PY - 2014/1

Y1 - 2014/1

N2 - We present a new setup to sympathetically cool 115In+ ions with 172Yb+ for optical clock spectroscopy. A first prototype ion trap made of glass-reinforced thermoset laminates was built, based on a design that minimizes axial micromotion and offers full control of the ion dynamics in all three dimensions. We detail the trap manufacturing process and the characterization of micromotion in this trap. A calibration of the photon-correlation spectroscopy technique demonstrates a resolution of 1.1 nm in motional amplitude of our measurements. With this method, we demonstrate a sensitivity to systematic clock shifts due to excess micromotion of | (Δ ν/ ν) mm | = 7.7 × 10 - 20 along the direction of the spectroscopy laser beam. Owing to our on-board filter electronics on the ion trap chips, no rf phase shifts could be resolved at this level. We measured rf fields over a range of 400 μm along the ion trap axis and demonstrated a region of 70 μm where an optical frequency standard with a fractional inaccuracy of ≤1 × 10-18 due to micromotion can be operated.

AB - We present a new setup to sympathetically cool 115In+ ions with 172Yb+ for optical clock spectroscopy. A first prototype ion trap made of glass-reinforced thermoset laminates was built, based on a design that minimizes axial micromotion and offers full control of the ion dynamics in all three dimensions. We detail the trap manufacturing process and the characterization of micromotion in this trap. A calibration of the photon-correlation spectroscopy technique demonstrates a resolution of 1.1 nm in motional amplitude of our measurements. With this method, we demonstrate a sensitivity to systematic clock shifts due to excess micromotion of | (Δ ν/ ν) mm | = 7.7 × 10 - 20 along the direction of the spectroscopy laser beam. Owing to our on-board filter electronics on the ion trap chips, no rf phase shifts could be resolved at this level. We measured rf fields over a range of 400 μm along the ion trap axis and demonstrated a region of 70 μm where an optical frequency standard with a fractional inaccuracy of ≤1 × 10-18 due to micromotion can be operated.

UR - http://www.scopus.com/inward/record.url?scp=84894427578&partnerID=8YFLogxK

U2 - 10.1007/s00340-013-5580-5

DO - 10.1007/s00340-013-5580-5

M3 - Article

AN - SCOPUS:84894427578

VL - 114

SP - 231

EP - 241

JO - Applied Physics B: Lasers and Optics

JF - Applied Physics B: Lasers and Optics

SN - 0946-2171

IS - 1-2

ER -