International Collaboration on Advanced Neutron Sources (ICANS XXIII)

Developing position sensitive polarization analysis method for time-of-flight neutron

15 Oct 2019, 14:30

25m

Meeting Room 3 (Chattanooga Convention Center)

Oral Presentation Instrument Instruments

Speaker

Tianhao Wang (China Spallation Neutron Source)

Description

Polarized neutron analysis has been widely applied to position sensitive experiment method, such as small angle neutron scattering

1. T. Wang, C. Y. Jiang, T. O. Farmer, L. Debeer-Schmitt, J. F. Wenzel, L. McDonald, J. L. Robertson, M. R. Fitzsimmsons, and X. Tong, Physica B 551, 492 (2018).

(SANS), neutron imaging

1. I. Dhiman, R. Ziesche, T. H. Wang, H. Bilheux, L. Santodonato, X. Tong, C. Y. Jiang, I. Manke, W. Treimer, T. Chatterji, and N. Kardjilov, Rev Sci Instrum 88 (9) (2017).

and neutron reflectometry

1. X. Tong, C. Y. Jiang, V. Lauter, H. Ambaye, D. Brown, L. Crow, T. R. Gentile, R. Goyette, W. T. Lee, A. Parizzi, and J. L. Robertson, Rev Sci Instrum 83 (7) (2012).

. However, current applications either limit the energy analysis to single wavelength or forgo complex neutron polarization manipulation. In this talk, we present our plan and effort to develop an integrated polarized neutron beamline that combines complex neutron polarization manipulation with time-of-flight neutron. The proposed beamline shall take advantage of the wavelength resolving nature of time-flight-neutron to better analysis the evolution of neutron polarization under external magnetic field, distinguishing neutron polarization shift caused by precession, depolarization and wavelength dispersion. The talk will introduce theoretical concept of the proposed beamline and set up as well as the development of such configuration on BL-20 at the China Spallation Neutron Source.