1. CLIC damping rings working plan towards the CDR
Yannis Papaphilippou
March, 12th 2009

2. Working packages Basic lattice design
Linear imperfections and correction
Non-linear dynamics and correction
Injection and extraction
Super-conducting wiggler design
Magnet systems
Collective effects (including IBS)
Vacuum systems
RF systems
Instrumentation
Power system
System integration and parameters
12/03/2009
CLIC DR meeting

3. Damping ring energy Evaluate the energy impact of the damping rings
Numerical tools
Lattice design and non-linear dynamics
Impedance estimation
Participate in common experiments at test facilities
IBS CESR-TA
Low emittance SLS
Resonance ATF, CESR-TA, Light Sources
Communication
Organize a workshop (winter )
Document common work in a working group report
12/03/2009
CLIC DR meeting

4. Basic lattice design Linear optics optimization including IBS
Working point and tunability
Chromaticity correction and DA with sextupoles
PDR optics optimization including DA
Geometrical aperture for DR and PDR
Magnet specifications for DR and PDR
May 09
April 09
September 09
12/03/2009
CLIC DR meeting

5. Linear imperfections
Orbit, coupling and vertical dispersion correction (low emittance tuning)
Gradient and optics correction
Tolerances for magnet alignment and linear imperfections
Correction systems for PDR and rough tolerances
Corrector magnet parameters
May 09
April 09
September 09
12/03/2009
CLIC DR meeting

6. Non-liner dynamics Non-linear imperfections and DA
Non-linear correction systems (sextupole, octupoles)
Error specifications for magnets
Effect of wigglers and tolerances   
May 09
April 09
September 09
12/03/2009
CLIC DR meeting

7. Injection-Extraction
Injection and extraction optics and concept for DR and PDR
Injection and extraction elements specifications and tolerances
Conceptual design of kicker and septa
May 09
April 09
September 09
12/03/2009
CLIC DR meeting

8. Injection-Extraction
Injection and extraction optics and concept for DR and PDR
Injection and extraction elements specifications and tolerances
Conceptual design of kicker and septa
May 09
April 09
September 09
12/03/2009
CLIC DR meeting

9. Injection-Extraction
Injection and extraction optics and concept for DR and PDR
Injection and extraction elements specifications and tolerances
Conceptual design of kicker and septa
May 09
April 09
September 09
12/03/2009
CLIC DR meeting

10. Super-conducting wiggler design
NbTi prototype work, including measurements
Nb3Sn prototype work, including magnet models, mechanical design and measurements
Radiation absorptions scheme and mechanical design
May 09
April 09
September 09
12/03/2009
CLIC DR meeting

11. Magnetic modeling of main magnets, including field quality
Magnet systems
Magnetic modeling of main magnets, including field quality
Corrector modeling
WP7. Collective effects
E-cloud and fast ion instability evaluation for final lattice design
Instabilities (transverse and longitudinal)
Space charge
Impedance evaluation for key components (absorbers, collimators, wiggler chambers, BPMs…)
Coherent synchrotron radiation
Intrabeam scattering for non-Gaussian distributions
Vacuum specifications
Feedback systems
WP8. Vacuum systems
Chamber coatings and experimental program for e-cloud mitigation (ESRF, CESR-TA)
Preliminary chamber mechanical design
Vacuum quality (pumps)
WP9. RF system
Conceptual design of RF system
Evaluation of longitudinal instabilities (HOM)
Longitudinal impedances
Design of the PDR RF system
WP10. Instrumentation
List of instruments for DR and PDR with required resolution, accuracy and stability
Ideas for the most critical items (e.g. turn-by-turn beam profile monitors)
WP11. Power systems
Inventory of needed power supplies and parameters for PDR and DR
WP12. Survey and stabilization
Alignment tolerances and stabilization issues
WP13. DR and PDR coordination
DR and PDR parameter consistency and design strategy
Design of PDR/DR for 500 GeV parameters
Systems integration and layout
Power consumption and costing
CLIC-ILC collaboration for DRs
May 09
April 09
September 09
12/03/2009
CLIC DR meeting

12. Collective effects
E-cloud and fast ion instability evaluation for final lattice design
Instabilities (transverse and longitudinal)
Space charge
Impedance evaluation for key components (absorbers, collimators, wiggler chambers, BPMs…)
Coherent synchrotron radiation
Intrabeam scattering for non-Gaussian distributions
Vacuum specifications
Feedback systems
May 09
April 09
September 09
12/03/2009
CLIC DR meeting

13. Vacuum systems
Chamber coatings and experimental program for e-cloud mitigation (ESRF, CESR-TA)
Preliminary chamber mechanical design
Vacuum quality (pumps)
May 09
April 09
September 09
12/03/2009
CLIC DR meeting

14. RF system Conceptual design of RF system
Evaluation of longitudinal instabilities (HOM)
Longitudinal impedances
Design of the PDR RF system
WP10. Instrumentation
List of instruments for DR and PDR with required resolution, accuracy and stability
Ideas for the most critical items (e.g. turn-by-turn beam profile monitors)
WP11. Power systems
Inventory of needed power supplies and parameters for PDR and DR
WP12. Survey and stabilization
Alignment tolerances and stabilization issues
WP13. DR and PDR coordination
DR and PDR parameter consistency and design strategy
Design of PDR/DR for 500 GeV parameters
Systems integration and layout
Power consumption and costing
CLIC-ILC collaboration for DRs
May 09
April 09
September 09
12/03/2009
CLIC DR meeting

15. RF system Conceptual design of RF system
Evaluation of longitudinal instabilities (HOM)
Longitudinal impedances
Design of the PDR RF system
 issues
May 09
April 09
September 09
12/03/2009
CLIC DR meeting

16. CLIC @ 500GeV Evaluate the energy impact of the damping rings
Numerical tools
Lattice design and non-linear dynamics
Impedance estimation
Participate in common experiments at test facilities
IBS CESR-TA
Low emittance SLS
Resonance ATF, CESR-TA, Light Sources
Communication
Organize a workshop (winter )
Document common work in a working group report
12/03/2009
CLIC DR meeting