1. Lattice Session Summary
ILCDR07 Workshop

2. Lattice Design Updates
Overview I
Lattice Design Updates
FODO lattice from Yi-Peng Sun
Reduction in straights and magnets relative to OCS6
ac in 2-6x10-4 range possible
TME lattice from Louis Emery
Discussion momentum compaction adjustment
Chicane for circumference adjustment
Lumped injection and extraction elements given updated kicker parameters
SuperB lattice and a possible ILC DR cell from Marica Biagini
FMA analysis on OCS6 and predessor from Ina Reichel
Better operating points can be found
March 7, 2007
ILCDR07 - Frascati

3. Overview II Wiggler updates Other
Permanent magnet hybrid update from Miro Preger
Better field quality
Detailed evaluation and control of octupole contributions
Optimized superconducting wiggler from Mark Palmer
Shorter period and higher field?
Cost reductions relative to RDR estimate
DAFNE wiggler optimization update from Simona Bettoni
Significant parameter improvement shown
Other
ATF kicker update from Takashi Naito
Alternative injection/extraction region design with bypass lines from David Rubin
March 7, 2007
ILCDR07 - Frascati

4. Discussion of Lattice Issues
Many items covered during Monday afternoon discussion
Key action items (short term):
Additions to lattices (Aimin Xiao and Yi-Peng Sun)
Timescale: Implement as much as possible by LCWS07
List:
Need to update RF configuration
Circumference Adjustability
Abort dump
Phase Trombone
Lumped Injection/Extraction Kickers
Implement separated injection/extraction straights
Add correctors (dipole and skew quad) to lattice definition for LET studies
Add BPM locations
Nomenclature for naming elements around ring
Specify apertures
Return to greater symmetry in the ring
March 7, 2007
ILCDR07 - Frascati

5. Action Items (continued)
Explore timing configurations compatible with electron subharmonic buncher (Greg Penn)
Timescale: For LCWS07
Interface with other systems (principal contact Tor R.), validate DR timing configuration/circumference and provide specification to lattice designers
Explore momentum compaction flexibility in TME and FODO lattices (Aimin Xiao and Yi-Peng Sun)
Timescale: 6 months
Possibly set default target at 3x10-4 and aim for +/-1x10-4 adjustability range. Need to understand what flexibility is allowed (also incorporate input from following study)
March 7, 2007
ILCDR07 - Frascati

6. Action Items (continued)
Study lattice features that may provide momentum compaction flexibility while maintaining emittance performance (Marica Biagini)
Timescale: 6 months
Provide comparisons of performance of cells used in the present TME and FODO lattices and, for instance, the KEKB lattice cell
Specify wiggler section parameters
Timescale:
Provide wiggler power load specifications and develop layout requirements
March 7, 2007
ILCDR07 - Frascati

7. Other Results of Discussion
An expanded list of items for evaluation has been generated
Will be maintained on the ILCDR07 talks web page
Most other items can be viewed as somewhat longer timescale
For example, update to shaft specifications needs to be completed for the EDR
March 7, 2007
ILCDR07 - Frascati

8. A set of very interesting work has been presented
Summary
A set of very interesting work has been presented
Short term milestones have been generated which attempt to:
Provide lattice information to support dynamics and technical studies in as timely a fashion as possible
Explore the most critical issues affecting the lattice directly, particularly the momentum compaction
Finalize the ring layout
Longer term milestones will be generated as the short term list is addressed
Thanks to everyone who contributed!
March 7, 2007
ILCDR07 - Frascati