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Absolute Particle Positions

The first form of the START command defines absolute particle positions:
X
Horizontal position $x$, referred to the ideal orbit [m].
PX
Horizontal canonical momentum, divided by the reference momentum [1].
Y
Vertical position $y$, referred to the ideal orbit [m].
PY
Vertical canonical momentum, divided by the reference momentum [1].
T
The negative time difference, multiplied by the instantaneous velocity of the particle [m].
PT
Momentum error, divided by the reference momentum [1].



MAD User Guide, http://wwwslap.cern.ch/mad/