QPepperpot, the emittance evaluation program
Ulrich Raich
Beam Instrumentation (BI) Group
Beams (BE) Department CERN, Geneva Switzerland
Abstract
The USPAS (the US particle accelerator school) in Albuquerque 2009 has a session that is dedicated to accelerator and beam diagnostics. In addition to lectures, hands on exercises are provided in the laboratory. Qpepperpot is a data evaluation program taking pepperpot images, acquired from an optical bench with a digital camera, as input and producing emittance plots as output. An optical bench with a light source, a pepperpot plate, several lenses and a USB camera is provided. The optical bench may be used to simulate different types on emittance measurements, namely the 3-profile measurement the quadrupole scan or the pepperpot method.
This program is dedicated to the data treatment of pepperpot images while other programs (Qprofiles, optics, drawEmittance) are provided for the other methods.