Geometric-phase-induced false electric dipole moment (EDM) signals, resulting from interference between magnetic field gradients and particle motion in electric fields, have been studied extensively in the literature, especially for neutron EDM experiments utilizing stored ultracold neutrons and co-magnetometer atoms. Previous studies have considered particle motion in the transverse plane perpendicular to the direction of the applied electric and magnetic fields. We show, via Monte Carlo studies, that motion along the field direction can impact the magnitude of this false EDM signal if the wall surfaces are rough such that the wall collisions can be modeled as diffuse, with the results dependent on the size of the storage cell's dimension along the field direction.
|Number of pages||3|
|Journal||Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment|
|State||Published - Jun 21 2011|
Bibliographical noteFunding Information:
We thank B. Filippone and R. Golub for valuable discussions. This work was supported in part by the U.S. Department of Energy under award number DE-FG02-08ER41557 , and by the University of Kentucky .
- Geometric-phase false EDM
- Neutron electric dipole moment
- Wall collisions
ASJC Scopus subject areas
- Nuclear and High Energy Physics