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Creating the Electric and Magnetic Fields for the nEDM@SNS Experiment


Blatnik, Marie Ann (2024) Creating the Electric and Magnetic Fields for the nEDM@SNS Experiment. Dissertation (Ph.D.), California Institute of Technology. doi:10.7907/7a0n-va47.


The neutron’s electric dipole moment (nEDM) remains one of the most important quantities to measure due to its sensitivity to new sources of CP violation. The nEDM@SNS Collaboration aims to improve this measurement by 2 orders of magnitude by using a novel measurement technique. This thesis focuses on two of the key challenges that this ambitious experiment must address, electrostatically and magnetostatically, respectively: the production of high voltage for the nEDM measurement using a Cavallo multiplier, and the magnetic environment created for the polarization and transmission of the cold neutron beam through the many nested components of the experimental apparatus. A series of Cavallo prototypes is developed, including a room-temperature apparatus and a cryogenic apparatus with two sets of electrodes. The created high voltage will be monitored without physical contact using a designed and prototyped field mill. Transmission and polarization measurements of the cold neutron beam through the nested components of the experimental apparatus are discussed.

Item Type:Thesis (Dissertation (Ph.D.))
Subject Keywords:nEDM; Magnetic Field; Electric Field; Cavallo; Field Mill; B0 Coil; Electrodes
Degree Grantor:California Institute of Technology
Division:Physics, Mathematics and Astronomy
Major Option:Physics
Awards:DOE Office of Science Graduate Science Research Fellowship.
Thesis Availability:Public (worldwide access)
Research Advisor(s):
  • Filippone, Bradley W.
Thesis Committee:
  • Hutzler, Nicholas R. (chair)
  • Wise, Mark B.
  • Porter, Frank C.
  • Holt, Roy J.
  • Filippone, Bradley W.
Defense Date:22 May 2024
Non-Caltech Author Email:marie.blatnik.physicist (AT)
Funding AgencyGrant Number
Office of Nuclear Physics (NP)LANLEEDM DE-AC52-06NA25396
Office of Nuclear Physics (NP)89233218CNA000001
Los Alamos National Laboratory Integrated Contract4000129433
Office of Science (DOE). Graduate Research Fellowship2021
Record Number:CaltechTHESIS:05302024-130708240
Persistent URL:
Related URLs:
URLURL TypeDescription adapted for ch. 2 adapted for Ch 3
Blatnik, Marie Ann0000-0003-3496-0010
Default Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:16446
Deposited By: Marie Blatnik
Deposited On:31 May 2024 23:26
Last Modified:12 Jun 2024 21:48

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