Fred L. Walls

TL;DR: In this article, the first observation of radiation-pressure cooling on a system of resonant absorbers which are elastically bound to a laboratory fixed apparatus was reported, and they were cooled to 40 K by irradiating them with the 8-ensuremath{\mu}W output of a frequency doubled, single-mode dye laser tuned to the low-frequency side of the Doppler profile on the $S 2S 1/2

TL;DR: In this article, the total cross section as a function of electron energy for recombination of electrons with room temperature NO+ has been measured with a trapped ion technique with an energy resolution between 0.045 and 0.120 eV.

TL;DR: In this paper, a short review of the progress that has occurred during years 1955-91 in both the theoretical and practical characterization of frequency stability of precision frequency sources is presented, focusing on the evolution of ideas and concepts for the characterization of random noise processes in such standards in the time domain and the Fourier frequency domain, rather than a rigorous mathematical treatment of the problem.

TL;DR: In this article, the evaluation procedure of a new laser-cooled caesium fountain primary frequency standard developed at the National Institute of Standards and Technology (NIST) is described.

TL;DR: In this article, a simple technique is proposed in which rf transitions between suitable energy levels of an atomic or molecular ion, a member of a stored, radiatively thermalized ion gas, may be detected by monitoring the translational temperature of the ion gas.