1. A 2.3 GHz BANDWIDTH STRUCTURE FOR CLIC_DDS Vasim Khan 17.07.09

2. Spectral function 96 cells 4-fold interleaving 192 cells 8-fold interleaving 24 cells No interleaving 48cells 2-fold interleaving

3. 96 cells 4-fold interleaving 192 cells 8-fold interleaving 24 cells No interleaving 48cells 2-fold interleaving ∆fmin = 65 MHz ∆tmax =15.38 ns ∆s = 4.61 m ∆fmin = 32.5 MHz ∆tmax =30.76 ns ∆s = 9.22 m ∆fmin = 16.25 MHz ∆tmax = 61.52 ns ∆s = 18.46 m ∆fmin = 8.12 MHz ∆tmax =123 ns ∆s = 36.92 m

4. Corrected formula for effective pulse length [1] Unloaded [1] A. Grudiev, CLIC-ACE, JAN 08 Allowed limit = 260 MV/m Allowed limit = 56 K Results based on only 3 cell simulations.

5. 7 cell simulations.

8. 232 47.3

9. ParametersCLIC_G (Optimised) [1,2] CLIC_DDS (Non-optimised) Bunch space (rf cycles/ns)6/0.58/0.67 Limit on wake (V/pC/mm/m)7.15.6 Number of bunches312 Bunch population (10 9 )3.724.5 Pulse length (ns)240.8273 Fill time (ns)62.941.68 Pin (MW)63.872 Esur max. (MV/m)245232 Pulse temperature rise (K)5347.3 RF-beam-eff.27.724.1 (for corrected pulse length: Eff.=26.6%) [1] A. Grudiev, CLIC-ACE, JAN 08 [2] CLIC Note 764 Updated

10. Considering 8 fold interleaved structure ParametersStructure # 1Structure # 8 f1, f24 (GHz)15.5787, 17.954316.0329, 18.2153 ∆f (GHz)2.07562.1824 a1, a24 (mm)4, 2.51753.8968, 2.3 /λ0.13 N (x10 9 particels/bunch)5.414.6275

11. 210 50.25 Pin=76.5 MW Structure # 1

12. 73.5 MW Structure # 8

13. Sum RMS wake-field of an 8-fold interleaved structure Amplitude wakeSumwake wake

14. Cell # Random error in f (MHz) Cell # f (GHz) Random error in frequencies +/- 3.5 MHz

15. 8 fold interleaved structure Random error in frequencies +/- 3.5 MHz

16. Amplitude wakeSumwake wake

17. Dipole simulations with fillet and high mesh Cell # 13 Cell # 24 Geometry with fillet, solution is converged and average mesh = 400 k No fillet, solution is not converged (only 3 passes )and average mesh = 50 k Geometry with fillet, solution is converged and average mesh = 400 k No fillet, solution is not converged (only 3 passes )and average mesh = 40 k Cell # 1 No fillet, solution is not converged (only 3 passes )and average mesh = 50 k Geometry with fillet, solution is converged and average mesh = 400 k

18. 24 cell structure Dashed curve : Unloaded condition Solid curve : Beam loaded condition ∆T (K) Pin (MW) Eacc (MV/m) Esur (MV/m) Allowable limit on Esur Avg. Eacc Allowable limit on ∆T

19. 8 – fold interleaving Structure # 1 Dashed curve : Unloaded condition Solid curve : Beam loaded condition ∆T (K) Pin (MW) Eacc (MV/m) Esur (MV/m) Allowable limit on Esur Avg. Eacc Allowable limit on ∆T

20. 8 – fold interleaving Structure # 8 Dashed curve : Unloaded condition Solid curve : Beam loaded condition ∆T (K) Pin (MW) Eacc (MV/m) Esur (MV/m) Allowable limit on Esur Avg. Eacc Allowable limit on ∆T