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Decoupling of a Neutron Interferometer from Temperature Gradients



Michael G. Huber, Muhammad D. Arif, P. Saggu, T. Mineeva, David Cory, Robert Haun, Ben Heacock, K Li, J. Nsofini, D. Sarenac, Chandra Shahi, V Skavysh, Mike Snow, S. Werner, A.R. Young, Dmitry Pushin


Neutron interferometry enables precision measurements that are typically operated within elaborate, multi-layered facilities which provide substantial shielding from environmental noise. These facilities are necessary to maintain the coherence requirements in a perfect crystal neutron interferometer which is extremely sensitive to local environmental conditions such as temperature gradients across the interferometer, external vibrations, and acoustic waves. The ease of operation and breadth of applications of perfect crystal neutron interferometry would greatly benefit from a mode of operation which relaxes these stringent isolation requirements. Here, the INDEX Collaboration and National Institute of Standards and Technology demonstrates the functionality of a neutron interferometer in vacuum and characterize the use of a compact vacuum chamber enclosure as a means to isolate the interferometer from spatial temperature gradients and time-dependent temperature fluctuations. The vacuum chamber is found to have no depreciable effect on the performance of the interferometer (contrast) while improving system stability, thereby showing that it is feasible to replace large temperature isolation and control systems with a compact vacuum enclosure for perfect crystal neutron interferometry.
Review of Scientific Instruments


interferometer, vacuum, stability


Huber, M. , Arif, M. , Saggu, P. , Mineeva, T. , Cory, D. , Haun, R. , Heacock, B. , Li, K. , Nsofini, J. , Sarenac, D. , Shahi, C. , Skavysh, V. , Snow, M. , Werner, S. , Young, A. and Pushin, D. (2016), Decoupling of a Neutron Interferometer from Temperature Gradients, Review of Scientific Instruments, [online],, (Accessed April 16, 2024)
Created December 16, 2016, Updated May 3, 2021