PTC_KNOB

USER MANUAL

SYNOPSIS


PTC_KNOB, 
elementname = [s, none] , 
kn    = [i, {-1}], 
ks    = [i, {-1}], 
exactmatch = [l, true, true] ;

Description

Sets knobs in PTC calculations (currently ony in PTC_TWISS, PTC_NORMAL will follow). Knobs appear as the additional parameters of the phase space. Twiss functions are then obtained as functions of these parameters (taylor series). Also map elements might

Example

Not yet ready : postion of quads is matched to obtain required R566 value.

Command parameters and switches

elementname

string in range format,

Specifies name of the element containing the knob(s) to be set.

kn,ks

list of integers,

Defines which order

exactmatch

logical, default true, if value explicitly not specified then true

Normally a knob is a property of a single element in a layout. The specified name must match 1:1 to an element name. This is the case when exactmatch is true.

Knobs might be alos set to all family of elements. In such case the exactmatch switch must be false. Filed components of all the elements that name starts with the name specified by the user become a single knob.