Courant–Snyder parameters
SET OF QUANTITIES IN ACCELERATOR PHYSICS
Twiss parameter; Draft:Courant Snyder Parameters; Draft:Courant Snyder parameters; Twiss parameters; Courant Snyder parameters; Courant-Snyder parameters; CS parameters; CS parameter
In accelerator physics, the Courant–Snyder parameters (frequently referred to as Twiss parameters or CS parameters) are a set of quantities used to describe the distribution of positions and velocities of the particles in a beam. When the positions along a single dimension and velocities (or momenta) along that dimension of every particle in a beam are plotted on a phase space diagram, an ellipse enclosing the particles can be given by the equation: