An Ortho/Para Deuterium Converter for Ultra-Cold Neutron Production at Los Alamos National Laboratory

Faculty Sponsor

Shirvel Stanislaus


Arts and Sciences


Physics and Astronomy

Presentation Type

Poster Presentation

Symposium Date

Spring 5-2-2015


The production of Ultra-Cold Neutrons (UCN) is essential for a number of experiments whose goal is to make precise measurements of neutron properties. With order-of-magnitude improvements in precision provided through the use of UCN, scientists plan to push towards physics beyond the Standard Model. At Los Alamos National Laboratory (LANL) a solid deuterium target is used for UCN production. As a result of previous studies, it is known that the storage time of UCN is dependent on the spin state of the deuterium target. The spin = 1 state of deuterium (para-D2), in which approximately one-third of the D2 molecules can be found, results in a shorter UCN residence time. Therefore, to lengthen the storage time, a conversion to the ground state (ortho- D2) is required. Because, in a solid sample of D2 it would take months for the sample to spontaneously relax to the required percentage of 99.8% ortho-D2, an Ortho/Para converter is used to accelerate the conversion. This project focuses on the design of a new, improved Ortho/Para Converter. The design requirements for the new Ortho/Para Converter for the LANL UCN system will be discussed.

Biographical Information about Author(s)

Adam Clark is a senior physics major from New Lenox, Illinois. Upon graduation, he will continue his education and pursue a Ph.D. in nuclear physics. The work presented is for the neutron Electric Dipole Moment collaboration with scientists working at Los Alamos National Laboratory.

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