A Statistical Analysis of the Beam Position Measurement in the Los Alamos Proton Storage Ring*

The beam position monitors (BPMs) are the main diagnostic in the Los Alamos Proton Storage Ring (PSR). They are used in several applications during operations and tuning including orbit bumps and measurements of the tune, closed orbit (CO), and injection offset. However, the BPM data acquisition system makes use of older technologies, such as matrix switches, that could lead to faulty measurements. This is the first statistical study of the PSR BPM performance using BPM measurements. In this study, 101 consecutive CO measurements are analyzed. Reported here are the results of the statistical analysis, tune and CO measurement spreads, the BPM single turn measurement error, and examples of observed data acquisition errors.