The LCLS undulator system requires very stable supports
in order to achieve the
desired system stability over long periods of time.
From the floor upward the supports consist of
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A fixed support base pedestal
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A transition plate which allows field adjustments of carried components
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Cam movers for fine remote position control
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And a girder system supported on the cam movers
This review will focus on the support system from the floor up to the
base of the cam movers. Although the committee should feel
free to comment on all aspects of the items being reviewed, we would
like to have, in particular, comments on the following aspects of
the design
-
Can the system, as designed, achieve the required stability
performance? Of particular importance is the stability
in time of the supports when subjected to expected temperature swings.
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Is the pedestal sufficiently stiff, both mechanically and thermally?
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Is the mounting of the pedestal to the floor sound?
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Is the concept used to provide field adjustment of the above mounted girder a sensible concept?
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Four vs. three points of contact and x/y/z positioning
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Sizing of all transition piece components
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Ease of use during survey and alignment
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Durability over time
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Is the concept for mounting the cam movers to the transition piece sound?
We will use your input to further develop the design into a final design that
will be the primary support for the LCLS undulator
system. Any and all of your comments are welcome.
We would like to have a written report delivered to us within 2 weeks time.
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