|FACET Lattice Description|
|Accelerator Directorate||FACET and Test Beam facilities||Lattice Descriptions||Device Database|
This is the home page of the lattice descriptions of the Facility for Advanced Accelerator Experimental Tests (FACET) Accelerator. The lattice descriptions are expressed in the Methodical Accelerator Design (MAD) language (version 8). There are also similar pages for the LCLS and planned LCLS II accelerators.
This page superceeds the FACET Optics "sharepoint" page.
The following are the FACET lattice description files in SLAC's CVS, as input to MAD:
|Main MAD command file||FACETe.mad8|
|LI20 experimental area||FACET_LI20_EXPT_2015.xsif|
|LI20 multipole definitions||FACET_LI20_multi.xsif|
The output results of "official" MAD runs are in timestamped directories under
/afs/slac/www/grp/ad/model/output/facet. The latest output is always in
Modelled element and device data are available in SLAC's Oracle Database. Select the "FACET_E" Beamline, and then see the Elements and Symbols tabs (they contain largely the same information).
These are the Twiss parameter plots. Click on the image for the set of plots in PDF.
The following is a zoomable PDF map of all the modelled elements of the FACET mad deck (click to open in a PDF viewer). It shows all the modelled elements including devices, markers etc, with their suml and Z positions, arranged left to right by Z and hierarchically by modelled line. Arrows link the elements to show the path of the beam from element to element through the machine.
These maps were created using script mad2dot.awk together with print and survey files as output from Mad (see header of mad2dot). mad2doc creates a dot file, for instance facet.dot. We then use the unix command dot, or Graphviz, to create a PDF from the dot file.
For those people who need to change the lattice files, there is a README in CVS, in
the same directory as the lattice files. That README describes how to do the CVS, and
use a makefile to publish the output files to
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