| Parameter Description | Argument Order | Argument Mnemonic | Units | Default Value |
|---|---|---|---|---|
| Length | 1 | L[cm] | cm | 0.0 |
| Parameter Description | Argument Order | Argument Mnemonic | Units | Default Value |
|---|---|---|---|---|
| Length | 1 | L[cm] | cm | 0.0 |
| Tilt | 2 | T | not specified | 0.0 |
While a drift element (type "O") has a single argument, namely the length of the drift in cm, the Instrument (type "I") is meant to be used for beam instrumentation e.g. beam position monitor, etc ... and is analogeous to the "monitor" element of DIMAD and MAD. Basically, it is an element which while behaving optically like a drift, needs to be distinguishible from generic empty space. Elements of type "I" allow a second argument. Although refered to as "tilt angle", it is not used in any OptiM calculations. and can be used to store any type of useful information. A possible application would be to use it as a flag to distinguish between horizontal and vertical BPMs. Even though it has no effect, the value of the "T" attribute is printed from the View|Lattice menu.
Example: O L[cm]=136 otarget =10 iIPM1A23 L[cm]=1 Tilt[deg]=90
Note that the second line is not a syntax error. Arguments are read sequentially and are delimited by the "=" character. The argument labels on the left hand side of "=" are ignored and are used only as mnemonics. In this example, the second line would be interpreted as
otarget L[cm]=10.