A. Hasegawa, K. Fukuda, N. Kotake, M. Kajita, T. Morikawa, William David Lee, C. Nelson, D. Jennings, L. Mullen, J.H. Shiriey, R. Drullinger
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An improved, optically-pumped, primary frequency standard
An improved primary frequency standard based on an optically-pumped, thermal, atomic-beam has been jointly developed by CRL and NIST. The design details along with the first evaluation and comparison with NIST's existing standard are presented.