Ultracold neutron (UCN) projection imaging is demonstrated using a boron-coated back-illuminated CCD camera and the Los Alamos UCN source. Each neutron is recorded through the capture reactions with10B. By direct detection at least one of the byproducts α, 7Li and γ (electron recoils) derived from the neutron capture and reduction of thermal noise of the scientific CCD camera, a signal-to-noise improvement on the order of 104 over the indirect detection has been achieved. Sub-pixel position resolution of a few microns is confirmed for individual UCN events. Projection imaging of test objects shows a spatial resolution less than 100μm by an integrated UCN flux one the order of 106 cm−2. The bCCD can be used to build UCN detectors with an area on the order of 1 m2. The combination of micrometer scale spatial resolution, low readout noise of a few electrons, and large area makes bCCD suitable for quantum science of UCN.
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-No Derivative Works 4.0 International License.
Kuk, K.; Cude-Woods, C.; Chavez, C. R.; Choi, J. H.; Estrada, J.; Hoffbauer, M.; Holland, S. E.; Makela, M.; Morris, C. L.; Ramberg, E.; Adamek, E. R.; Bailey, T.; Blatnik, M.; Broussard, L. J.; Brown, M. A.P.; Callahan, N. B.; Clayton, S. M.; and Currie, S.. 2021. Projection Imaging with Ultracold Neutrons. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. Vol.1003 https://doi.org/10.1016/j.nima.2021.165306 ISSN: 0168-9002