Optimization of a superconducting adiabatic radio frequency neutron resonant spin flipper

Fankang Li, Ryan Dadisman, David C. Wasilko

Research output: Contribution to journalArticlepeer-review

4 Scopus citations

Abstract

The neutron radio frequency (RF) spin flipper is one of the key components to implement neutron resonance spin echo (NRSE) for high resolution measurements of dynamics in materials. Various types of RF flippers have been built and implemented including adiabatic and non-adiabatic RF flippers. For a pulsed neutron source, adiabatic RF flipper is more favorable due to its wide operation bandwidth. However, the optimization criteria of an adiabatic RF flipper is still lacking. Also they are difficult to be operated in bootstrap mode, which can be use to minimize the phase aberration and increase the achievable resolution. In the report by Dadisman et al. (2019), an adiabatic RF flipper has been built for the first time with superconducting technologies, which allows bootstrap mode. In this article, the method of optimizing the device and the detailed design will be discussed for each component of the device.

Funding

This work is sponsored by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory , managed by UT-Battelle, LLC, for the U. S. Department of Energy. This material is based upon work supported by the U.S. Department of Energy , Office of Science , Office of Basic Energy Sciences, United States under contract number DE-AC05-00OR22725 . This research used resources at the Missouri University Research Reactor (MURR). We are grateful to the support from MURR, H. Kaiser, Z. Buck and J. Schaeperkoetter. We also would like to acknowledge the help from S. Kuhn, L. Crow, R. Riedel, L. Robertson, P. Jiang, T. Wang and N. Silva to setup the neutron measurements, J. Pierce, T. Sherline, A. Parizzi, Y. Kang and S. Lee for the off-line measurements. We are also grateful to the useful discussions with M. Thijs, J. Plomp and S. Parnell from TU-Delft. This manuscript has been authored by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).This work is sponsored by the Laboratory Directed Research and Development Program of Oak Ridge National Laboratory, managed by UT-Battelle, LLC, for the U. S. Department of Energy. This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences, United States under contract number DE-AC05-00OR22725. This research used resources at the Missouri University Research Reactor (MURR). We are grateful to the support from MURR, H. Kaiser, Z. Buck and J. Schaeperkoetter. We also would like to acknowledge the help from S. Kuhn, L. Crow, R. Riedel, L. Robertson, P. Jiang, T. Wang and N. Silva to setup the neutron measurements, J. Pierce, T. Sherline, A. Parizzi, Y. Kang and S. Lee for the off-line measurements. We are also grateful to the useful discussions with M. Thijs, J. Plomp and S. Parnell from TU-Delft.

Keywords

  • Neutron adiabatic RF flipper
  • Neutron resonance spin echo
  • Nuclear magnetic resonance
  • Superconducting magnetic device

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