Demonstration of sub-micron UCN position resolution using room-temperature CMOS sensor

Mar 15, 2023, 10:20 AM
Bldg 53 / Room 1320 - Panofsky Auditorium (SLAC)

Bldg 53 / Room 1320 - Panofsky Auditorium


2575 Sand Hill Rd Menlo Park, CA USA
Oral Applications Application


Shanny Lin (Los Alamos National Laboratory)


Authors: S. Lin1,2; W. Li1; T. Bailey3; J. K. S. Baldwin1; M. Blatnik4; N. B. Callahan5; J. H. Choi3,6; S. M. Clayton1; C. Cude-Woods1,3,6; S. A. Currie1; M. Dawid7,8; B. W. Filippone4; W. Fox7,8; E. M. Fries4; P. Geltenbort9; E. George10; F. M. Gonzalez7,8,11; L. Hayen3,6; K. P. Hickerson4; M. A. Hoffbauer1; K. Hoffman10; A. T. Holley10; T. M. Ito1; A. Komives12; C.-Y. Liu7,8,13; M. Makela1; C. L. Morris1; R. Musedinovic3,6; N. Naheed1,14; C. O’Shaughnessy1; R. W. Pattie, Jr.15; J. Ramsey11; D. J. Salvat7,8; A. Saunders11; E. I. Sharapov16; S. Slutsky4; S. Spannagel17; V. Su4; X. Sun4; C. Swank4; Z. Tang1; W. Uhrich1; J. Vanderwerp7,8; P. Walstrom1; W. Wei4; B. Wolfe1; A. R. Young3,6; H. Zhu2; Z. Wang1

1 Los Alamos National Laboratory, Los Alamos, NM 87545, USA
2 Department of Electrical and Computer Engineering, The University of Texas at Austin, Austin, TX 78712, USA
3 Department of Physics, North Carolina State University, Raleigh, NC 27695, USA
4 Kellogg Radiation Laboratory, California Institute of Technology, Pasadena, CA 91125, USA
5 Argonne National Laboratory, Lemont, IL 60439, USA
6 Triangle Universities Nuclear Laboratory, Durham, NC 27708, USA
7 Department of Physics, Indiana University, Bloomington, IN, 47405, USA
8 Center for Exploration of Energy and Matter, Indiana University, Bloomington, IN, 47405, USA
9 Institut Laue-Langevin, CS 20156, 38042 Grenoble Cedex 9, France
10 Tennessee Technological University, Cookeville, TN 38505, USA
11 Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA
12 DePauw University, Greencastle, IN 46135, USA
13 Department of Physics, University of Urbana-Champaign, Urbana, IL 61801, USA
14 Benedict College, Columbia, SC 29204, USA
15 East Tennessee State University, Johnson City, TN 37614, USA
16 Joint Institute for Nuclear Research, 141980 Dubna, Russia
17 Deutsches Elektronen-Synchrotron, Notkestraße 85, 22607 Hamburg, Germany

Corresponding Author:

(For ULITIMA 2022 Conference, SLAC, Menlo Park, CA 94025, USA; Oct. 3-6, 2022)

High spatial resolution of ultracold neutron (UCN) measurement is crucial to several experiments using ultracold neutrons, including UCN spectrometers, UCN polarimeters, quantum physics of UCNs, and quantum gravity. Here we describe experimental results to demonstrate sub-micron spatial resolutions for UCN position measurements obtained using a room-temperature CMOS sensor, extending our previous work [1] that demonstrated a position uncertainty of 1.5 microns. We also explore the use of machine learning and the open-source software Allpix Squared to automatically analyze the UCN position. The automated analysis for sub-micron position resolution in UCN detection combined with the fast data rates of current and next generation UCN sources will enable improved precision for all modern UCN studies.

[1] K. Kuk, et. al. “Projection imaging with ultracold neutrons.” Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 1003, 165306 (2021).


Primary author

Shanny Lin (Los Alamos National Laboratory)


et al. et al. (UCNtau Collaboration)

Presentation materials