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Title: Magnetic microscopic imaging with an optically pumped magnetometer and flux guides

Here, by combining an optically pumped magnetometer (OPM) with flux guides (FGs) and by installing a sample platform on automated translation stages, we have implemented an ultra-sensitive FG-OPM scanning magnetic imaging system that is capable of detecting magnetic fields of ~20 pT with spatial resolution better than 300 μm (expected to reach ~10 pT sensitivity and ~100 μm spatial resolution with optimized FGs). As a demonstration of one possible application of the FG-OPM device, we conducted magnetic imaging of micron-size magnetic particles. Magnetic imaging of such particles, including nano-particles and clusters, is very important for many fields, especially for medical cancer diagnostics and biophysics applications. For rapid, precise magnetic imaging, we constructed an automatic scanning system, which holds and moves a target sample containing magnetic particles at a given stand-off distance from the FG tips. We show that the device was able to produce clear microscopic magnetic images of 10 μm-size magnetic particles. In addition, we also numerically investigated how the magnetic flux from a target sample at a given stand-off distance is transmitted to the OPM vapor cell.
Authors:
ORCiD logo [1] ; ORCiD logo [1] ;  [2] ; ORCiD logo [1]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States); National Tsing Hua Univ., Hsinchu (Taiwan)
Publication Date:
Report Number(s):
LA-UR-16-28672
Journal ID: ISSN 0003-6951; TRN: US1700944
Grant/Contract Number:
AC52-06NA25396
Type:
Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 110; Journal Issue: 4; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Laboratory Directed Research and Development (LDRD) Program
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; Atomic and Nuclear Physics
OSTI Identifier:
1344366

Kim, Young Jin, Savukov, Igor Mykhaylovich, Huang, Jen -Huang, and Nath, Pulak. Magnetic microscopic imaging with an optically pumped magnetometer and flux guides. United States: N. p., Web. doi:10.1063/1.4975069.
Kim, Young Jin, Savukov, Igor Mykhaylovich, Huang, Jen -Huang, & Nath, Pulak. Magnetic microscopic imaging with an optically pumped magnetometer and flux guides. United States. doi:10.1063/1.4975069.
Kim, Young Jin, Savukov, Igor Mykhaylovich, Huang, Jen -Huang, and Nath, Pulak. 2017. "Magnetic microscopic imaging with an optically pumped magnetometer and flux guides". United States. doi:10.1063/1.4975069. https://www.osti.gov/servlets/purl/1344366.
@article{osti_1344366,
title = {Magnetic microscopic imaging with an optically pumped magnetometer and flux guides},
author = {Kim, Young Jin and Savukov, Igor Mykhaylovich and Huang, Jen -Huang and Nath, Pulak},
abstractNote = {Here, by combining an optically pumped magnetometer (OPM) with flux guides (FGs) and by installing a sample platform on automated translation stages, we have implemented an ultra-sensitive FG-OPM scanning magnetic imaging system that is capable of detecting magnetic fields of ~20 pT with spatial resolution better than 300 μm (expected to reach ~10 pT sensitivity and ~100 μm spatial resolution with optimized FGs). As a demonstration of one possible application of the FG-OPM device, we conducted magnetic imaging of micron-size magnetic particles. Magnetic imaging of such particles, including nano-particles and clusters, is very important for many fields, especially for medical cancer diagnostics and biophysics applications. For rapid, precise magnetic imaging, we constructed an automatic scanning system, which holds and moves a target sample containing magnetic particles at a given stand-off distance from the FG tips. We show that the device was able to produce clear microscopic magnetic images of 10 μm-size magnetic particles. In addition, we also numerically investigated how the magnetic flux from a target sample at a given stand-off distance is transmitted to the OPM vapor cell.},
doi = {10.1063/1.4975069},
journal = {Applied Physics Letters},
number = 4,
volume = 110,
place = {United States},
year = {2017},
month = {1}
}