Our paper “A New Cryogenic Apparatus to Search for the Neutron Electric Dipole Moment” was recently published in the Journal of Instrumentation, Vol. 14, P11017, 2019. It can be found here: https://iopscience.iop.org/article/10.1088/1748-0221/14/11/P11017
The apparatus is designed to produce an ultra-high density of ultra-cold neutrons (UNCs), which will be used to constrain the neutron’s electric dipole moment. The design will provide an ultimate statistical uncertainty for the EDM of 2−3× 10−28 e-cm, with anticipated systematic uncertainties below this level.
In spring we completed cryogenic tests outside biological shield at the PULSTAR reactor and started preparations for tests with neutrons. First test in the biological shield is scheduled for themiddle of October. We will check our radiation shielding and probe neutron fluxes at different locations.
We also successfully cooled down our new Electric Dipole Moment (EDM) cryostat with the dilution refrigerator for the first time. Our next cooldown will be this month, and will be the first time with a test SQUID magnetometer installed.
This summer undergraduate Rami Alshoroogi was performing design work and assembling UCN source parts for the PULSTAR ultra-cold neutron source. New graduate students Cole Teander, Matt Morano and Clark Hickman joined our group and completed research projects related to the neutron EDM.
We are also happy to welcome our new postdoc, Tom Rau, who did his PhD at University of Illinois, Urbana-Champaign, IL.
Undergraduate Jose Colon Rivera was named a Ronald E. McNair Scholar for the upcoming year, supporting his undergraduate research experience and helping him prepare for admission to a doctoral program and PhD completion.
Undergraduate Zach Hainsel interned at ORNL this summer, performing scintillator R&D in collaboration with the Physics Division aimed at improving reactor neutrino measurements and next-generation searches for neutrinoless double-beta decay.
A big congratulations to Ben Heacock on successfully defending his Ph.D. dissertation on “Neutron Dynamical Diffraction: Interferometer Improvement and Precision Structure Factor Measurements”!