Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/148468
Title: A compact and laser-induced source of ultracold strontium atoms
Authors: Hsu, Chung Chuan
Keywords: Science::Physics
Issue Date: 2021
Publisher: Nanyang Technological University
Source: Hsu, C. C. (2021). A compact and laser-induced source of ultracold strontium atoms. Final Year Project (FYP), Nanyang Technological University, Singapore. https://hdl.handle.net/10356/148468
Abstract: Strontium has been progressively viewed as an unmissable source of ultracold atoms, with its widespread popularity gaining traction nowadays in the form of optical lattice clocks for frequency and time standards. However, conventional sources of strontium are usually bulky and elaborate, requiring extensive setups in the form of ovens, Zeeman slower and pre-cooling apparatuses. In light of the limitations, this project proposes an alternative, compact and portable method to produce ultracold strontium with an ablation technique. Strontium solid granules are ablated by a focused 1064nm laser, in which strontium atomic vapor is then emitted and trapped in a 3D Magneto-Optical Trap (MOT) formed by six counter-propagating 461nm laser beams and thirty-two Neodymium-Iron-Boron (NdFeB) permanent magnets. Using a single-pulse ablation power of 23W, we achieved a loading time of 4s and an average lifetime τ of around 4s, which is quite long for further quantum technology applications. This newfound portability opens up the possibility of conducting inertial sensing and precision measurement experiments outdoors, such as in relativistic geodesy and metrology. A transportable source of ultracold strontium also finds potential applications in civilian defence and quantum simulation of physical problems. Lastly, the ablation technique used also opens up laser cooling possibilities to other elements such as Tungsten that normally require high temperature.
URI: https://hdl.handle.net/10356/148468
Fulltext Permission: embargo_restricted_20230427
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Student Reports (FYP/IA/PA/PI)

Files in This Item:
File Description SizeFormat 
PH4111FYP_HsuChungChuan_22Apr2021_Thesis.pdf
  Until 2023-04-27
33.14 MBAdobe PDFUnder embargo until Apr 27, 2023

Page view(s)

118
Updated on Jan 24, 2022

Google ScholarTM

Check

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.