Editing Element Definitions

An element definition can be changed in two ways:

Entering a new definition: The element will be replaced in the main beam line expansion.
Entering the element name together with new attributes: The element will be updated in place, and the new attribute values will replace the old ones.

This example shows two ways to change the strength of a quadrupole:

QF: QUADRUPOLE,L=1,K1=0.01;     ! Original definition of QF
QF: QUADRUPOLE,L=1,K1=0.02;     ! Replace whole definition of QF
QF,K1=0.02;                     ! Replace value of K1

When the type of the element remains the same, replacement of an attribute is the more efficient way.

Element definitions can be edited freely. The changes do not affect already defined objects which belong to its element class.

hansg, January 24, 1997