Small-angle neutron polarimetry apparatus (SANPA): Development at the NIST Center for Neutron Research

Journal Article · 26 June 2019 · Review of Scientific Instruments

DOI: https://doi.org/10.1063/1.5091110 · OSTI ID:1612552

Tosado, J. ^[1]; Chen, W. C. ^[2]; Gnewuch, S. ^[1]; Hasaan, T. ^[3]; Dax, T. ^[3]; Rodriguez, E. E. ^[1]

---

1. Univ. of Maryland, College Park, MD (United States)
2. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States)
3. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States)

Spherical neutron polarimetry directly measures the rotation of the neutron polarization after scattering from materials with magnetic structure. It is an under utilized measurement technique that is capable of measuring all nine elements of the polarization tensor of a material. In this article, we describe our new cryogen-free small-angle neutron polarimetry apparatus and infrastructure at the NIST Center for Neutron Research. The resulting apparatus is capable of continuous operation and is designed for measurements at low temperatures (4–8 K) using niobium Meissner shielding and mu-metal shielding to produce a zero-field (≤1 μT) cooling sample environment.

• Research Organization: Univ. of Maryland, College Park, MD (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES)
• Grant/Contract Number: SC0016434
• OSTI ID: 1612552
• Alternate ID(s): OSTI ID: 1529656
• Journal Information: Review of Scientific Instruments, Vol. 90, Issue 6; ISSN 0034-6748
• Publisher: American Institute of Physics (AIP)Copyright Statement
• Country of Publication: United States
• Language: English