A Comparative Study of Profile and Scraping Methods for Emittance Measurements in the PS Booster

It is important to have a clear understanding of the transverse emittance in a circular accelerator in order to achieve optimum brilliance. Experience with comparing emittance data from different instruments has shown that systematic errors can be important. In an attempt to detect such errors in the PS Booster, the emittance measurements are made according to two different principles: measurement of density distribution and measurement of amplitude distribution. In this paper we i) discuss these two principles and the theory behind them; ii) show how the data can be compared; iii) describe the instrumentation used for these measurements; and iv) present results for the typical PS Booster beams.