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The XAL model includes energy, which it acquires explicitly from klystrons (if running "from PV") at the time the lattice is tracked. Therefore there is no "BDES to KMOD" requirement for online applications as such . Is there a "KMOD to BDES" requirement? That is, is there a Lattice Diagnostics requirement for online applications, and a need to keep magnet "fudge factors" (see questions )?.

Beamline Descriptions

The number of beamline description input files we need depends on the number of beamline geometries the LCLS will be run in (for instance, how many modeled extraction lines for experiments will there be)? It additionally depends on how many energy profiles will there be? Also high-level applications that deal with beamlines (bpm orbit displays, steering etc) will initialize displays based on the end-points of an input XAL beamline description file. So the XAL orbit correction app for instance, will always initialize to steer the whole LCLS unless a separate beamline file is written for smaller regions of interest - such as injection separately from main linac.

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   verifyAFSclient verifyAFSclient

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   bestWindowsX11 bestWindowsX11

   Find best performing Windows X11 server for JFC/Swing clients.

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   q_dbgeoonly q_dbgeoonly

   How complex is the conversion of Oracle DB to XAL lattice? Does the db contain enough to emit a lattice? Mark Woodley warns that there are probably many things necessary in the XAL lattice which need not be in the DB (marker points), and many things in the DB which should not be in the lattice. This latter class includes things like dummy BPMs, so not simply the case that everything of a given class should be in the lattice. People change the z of things in the DB. May be a good idea to have a "Skeleton" XAL file (maybe processed by xsl/php).

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   kmodtobdes kmodtobdes

   Verify there is no "KMOD to BDES" requirement?
   1. That is, is there a Lattice Diagnostics requirement for online applications, and a need to keep magnet "fudge factors"?
   2. Which XAL applications allow one to update the EPICs magnet k-values after a successful model run?
5. Does XAL really not model acceleration? If not how is it useful for SNS?
6. Verify that XAL does not model a plane coupled system.
7. Does XAL offer matrix manipulation, linear algebra and fitting adequate for the LCLS? Ans: yes, uses JAMA.
8. How long does XAL take to parse an XAL beamline? It has to build a DOM tree, which can't be negligible. Since that is a requirement of every XAL application at initialization its an important performance bottleneck.

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   q_numbeamlines q_numbeamlines

   How many beamline descriptions should there be?
10. What is the canonical list of XAL physics apps?
11. Does LCLS need SVD based orbit minimization? Is there an orbit minimization in XAL?

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