Low noise magnetic fields in ultracold experiment
Name
1191824144-MIT.pdf
Size
634.78 KB
Format
Adobe PDF
Checksum (MD5)
9600e5002fa4a18589650e9142ecc5cc
Author(s)
Nolasco-Martinez, Eber.
Advisor(s)
Wolfgang Ketterle.
Date Issued
2020
Publisher
Massachusetts Institute of Technology
Abstract
Ultracold atomic and molecular experiments rely on low noise ambient magnetic fields for precision spectroscopy and studying Feshbach resonances with narrow linewidths, which can be on the order of 1 [mu] T. The ambient field is impacted by both the Earth's magnetic field and technical noise from surrounding electrical equipment, which can vary through the day. We built an apparatus using an Arduino microprocessor to record the ambient fields with magnetometers located outside the vacuum chamber containing the atoms and output transformed waveforms at 30 Hz intervals to be feed forwarded to the coils and cancel both the average field and fluctuations. We achieved an RMS of 37 nT along one axis in the magnetic fields in our test setup using this apparatus, reducing the 60 Hz component by 30 dB and the 180 Hz component by 20 dB.
Description
Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2020
Cataloged from the official PDF of thesis.
Includes bibliographical references (pages 54-55).
Subjects
Physics.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Terms of Use
MIT theses may be protected by copyright. Please reuse MIT thesis content according to the MIT Libraries Permissions Policy, which is available through the URL provided.
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