pISSN 0374-4914 eISSN 2289-0041

Research Paper

New Phys.: Sae Mulli 2020; 70: 618-624

Published online July 31, 2020 https://doi.org/10.3938/NPSM.70.618

$^{87}$Rb Atom Trap and Atomic Beam Generation by Using a Truncated Pyramidal Mirror

Sunyoung SEO, Eunkang KIM, Ashish Kumar SHARMA, Juntae KOH, Jung Bog KIM*

Department of Physics Education, Korea National University of Education, Cheongju 28173, Korea

Correspondence to:jbkim@knue.ac.kr

Received: March 6, 2020; Revised: June 1, 2020; Accepted: June 2, 2020

Abstract

In this study, a truncated pyramidal mirror was used to generate a magneto-optical trap (MOT) of $^{87}$Rb atoms and a continuous cooled atomic beam therefrom. The pyramidal mirror has an angle of 90$^\circ$ between facing sides, and the tip has a squarehorn shape with an 18-mm length on one side. The size of the cut is 6 mm $\times$ 6 mm. The number of trapped atoms was measured to be about 10$^7$ atoms. The mean velocity of the atomic beam inside the pyramidal mirror is 3.58 m/s - 20.8 m/s, the flux is 3.6 $\times$ 10$^7$ atoms/s - 2.1 $\times$ 10$^8$ atoms/s, the atomic beam velocity distribution is 0.73 m/s - 7.34 m/s and the atomic beam temperature is 4 mK - 323 mK, respectively. This study confirms the feasibility of miniaturization of a continuously cooled atomic beam generator and provides basic data for the commercialization of atomic precision measurement technology.

Keywords: Pyramidal mirror, Rb atom, Magneto-Optical Trap(MOT), Atomic beam