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

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

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 experiments @ CESR-TA Low emittance tuning @ SLS Resonance analysis @ ATF, CESR-TA, Light Sources Communication Organize a workshop (winter 2009-2010) Document common work in a working group report 12/03/2009 CLIC DR meeting

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

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

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

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

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

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

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

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

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

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

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

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

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 experiments @ CESR-TA Low emittance tuning @ SLS Resonance analysis @ ATF, CESR-TA, Light Sources Communication Organize a workshop (winter 2009-2010) Document common work in a working group report 12/03/2009 CLIC DR meeting