Transcript History of Design

LCLS Fixed Support IDR
Introduction and History
Are special fixed supports needed?
Initial ideas for “undulator cells”
Granite and the cradle/girder interface.
Transfer scope to ANL
Alternative ideas
SUT and Production of fixed supports
12th January 2006
Geoff Pile
LCLS Fixed support IDR
[email protected]
Are special fixed supports needed?
Successful SASE FEL operation depends on extremely precise
location of the components in the undulator system.
Historical measurements of slow ground motion at the SLAC site,
atmospheric pressure and thermal effects show that re-alignments
of the undulators could be required more often than once a month.
It was expected that a motorized mover system would take up
small weekly or monthly realignments but the fixed support would
have to take up large initial construction settlement and
subsequently longer term settlement throughout the life of the
project.
Complete system stability and alignment is therefore critical. A
special two tier system of fixed and motorized supports will be
required.
12th January 2006
Geoff Pile
LCLS Fixed support IDR
[email protected]
Initial ideas for “undulator cells”
The technical hardware in the Undulator Tunnel is comprised
of 33 Undulators and associated equipment.
Each undulator is separated and followed by a diagnostic
break section.
There are two types of diagnostic break.
Very simple: Short breaks and Long breaks.
A cell is made up of three undulators - two with short breaks
and the third undulator has a long break
33 undulators would mean 11 sequential cells of 3
undulators
12th January 2006
Geoff Pile
LCLS Fixed support IDR
[email protected]
SLAC Granite and the ANL cradle/girder
interface.
• Slac initially proposed eleven granite, fixed support bases
ANL to supply one complete undulator cell for each base.
•This type of base could be made extremely flat, stable and
would be the interface to ANL’s support mover system
•Great idea – ANL would only have to supply a motorized
“Cradle” to support and adjust each undulator.
12th January 2006
Geoff Pile
LCLS Fixed support IDR
[email protected]
12th January 2006
Geoff Pile
LCLS Fixed support IDR
[email protected]
Transfer scope to ANL
In the Spring of 05, design responsibility for the fixed supports
was transferred to ANL.
This made sense. SLAC would look after conventional facilities
and ANL would design from the floor upwards.
The whole design for undulator stability and adjustment would be
the responsibility of one group.
12th January 2006
Geoff Pile
LCLS Fixed support IDR
[email protected]
Alternative initial ideas • Multiple supports per undulator
• Large amount of design collaboration ( SS with ET & SLAC).
• Cradle became a girder
12th January 2006
Geoff Pile
LCLS Fixed support IDR
[email protected]
The Single Undulator Test and Production
versions of Fixed Supports
New prototype designs on order
Some legacy parts left over for SUT
Post SUT - System Optimization for
Production
(Re-look at connecting plate, girder etc.)
12th January 2006
Geoff Pile
LCLS Fixed support IDR
[email protected]
Two supports per Undulator
12th January 2006
Geoff Pile
LCLS Fixed support IDR
[email protected]
Cost & Schedule
Budget is approximately $12k undulator
2 supports / undulator = $6k / support
P3 says
- IDR (12/6/05)
SUT
- Prep next month
FDR
- 4/24/06
Procurement
- 6/15/06
Installation
- 08/07 ~ April/July 07
70+ units
12th January 2006
Geoff Pile
LCLS Fixed support IDR
[email protected]