Description
Speaker:
Dr Piyaphat Phoonthong
National Institute of Metrology (Thailand)
Abstract:
In this work, we present an evaluation of excess micromotion within a linear, asymmetric segmented Paul trap developed at the National Institute of Metrology, Thailand (NIMT). To characterize the micromotion amplitude, we employ the photon correlation method, which utilizes the correlation between the ion's fluorescence and the trap's RF drive phase to quantify the underlying stray electric field. Following the systematic compensation of these stray fields, we evaluate the resulting frequency shifts on the 435-nm electric-quadrupole clock transition in 171Yb+. Our results demonstrate a second-order Doppler shift contribution of -1.2(8)x10-18, successfully validating both the trap's performance and the effectiveness of our compensation.