CLICDDSHPA 26 08 2010 V Khan Vasim Khan

DDS_HPA: Cell # 24 t =4 mm t =3 mm t =2. 9 mm

DDS_HPA: Cell # 24 Φ = 0 deg. Mc= 14 mm, Mr= 2 mm,

DDS_HPA: Cell # 1 Φ = 0 deg. Mc= 14 mm, Mr= 2 mm,

DDS_HPA: Mc= 14 mm, Mr= 2 mm, Rc= 6. 8 mm, W=1. 5 mm,

Rc= 6. 8 mm Rc= 7. 3 mm Rc= 7. 8 mm Cell #

Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 7/20

Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 9/20

Cell #1_t = 4 mm: DDS_HPA Cell #24_t = 3 mm: DDS_HPA Rc vg

Fundamental mode properties Mc= 14 mm, Mr= 2 mm, Rc= 6. 8 mm, W=1.

Comparison RF parameters Unit DDS_A DDS_HPA 1 DDS_HPA 2 Bunch population 109 4. 2

Mc= 14 mm, Mr= 2 mm, Rc= 7. 3 mm, W=1. 5 mm, H=

Cell # 1 Cell # 24 Vasim Khan MEW group meeting, Cockcroft Institute 26.

Where is the problem? DDS_A DDS_HPA Vasim Khan MEW group meeting, Cockcroft Institute 26.

Where is the problem? DDS_HPA DDS_A Beam loaded Vasim Khan Unloaded MEW group meeting,

Cell # 24 Rc= 9. 0 mm Rc= 8. 5 mm Cell Rc Q

Mc= 14 mm, Mr= 2 mm, Rc= Variable, W=1. 5 mm, H= 3 mm,

TRANSVRS Dipole bands: 7 cell simulations Vasim Khan MEW group meeting, Cockcroft Institute 26.

Next! • DDS_HPA: Dipole coupling is fixed • DDS_HPA: Excessive H-field/ unloaded gradient to

Summary: CLIC_DDS_A Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 21/20

NLC: H 60 VG 4 SL 17 A Vasim Khan MEW group meeting, Cockcroft

Continued from slide # 7 Vasim Khan MEW group meeting, Cockcroft Institute 26. 08.

Continued from slide # 9 Vasim Khan MEW group meeting, Cockcroft Institute 26. 08.

DDS_HPA: Cell # 24 Continued from slide # 7 Vasim Khan MEW group meeting,

Slides: 26

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CLIC_DDS_HPA 26. 08. 2010 V. Khan Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 1/20

DDS_HPA: Cell # 24 t =4 mm t =3 mm t =2. 9 mm t =1 mm Vasim Khan t =2. 1 mm MEW group meeting, Cockcroft Institute 26. 08. 10 2/20

DDS_HPA: Cell # 24 Φ = 0 deg. Mc= 14 mm, Mr= 2 mm, Rc= 6. 8 mm W=1. 5 mm H= 2. 5 mm R=1 mm Vasim Khan Φ = 180 deg. MEW group meeting, Cockcroft Institute 26. 08. 10 3/20

DDS_HPA: Cell # 1 Φ = 0 deg. Mc= 14 mm, Mr= 2 mm, Rc= 6. 8 mm W=1. 5 mm H= 2. 5 mm R=1 mm Vasim Khan Φ = 180 deg. MEW group meeting, Cockcroft Institute 26. 08. 10 4/20

DDS_HPA: Mc= 14 mm, Mr= 2 mm, Rc= 6. 8 mm, W=1. 5 mm, H= 2. 5 mm, R=1 mm Cell # 1 Rc = 6. 8 mm Rc = 7. 3 mm Rc = 7. 8 mm Vasim Khan Cell # 24 Rc = 6. 8 mm Rc = 7. 3 mm Rc = 7. 8 mm MEW group meeting, Cockcroft Institute 26. 08. 10 5/20

Rc= 6. 8 mm Rc= 7. 3 mm Rc= 7. 8 mm Cell # 1 Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 6/20

Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 7/20

Rc= 6. 8 mm Rc= 7. 3 mm Rc= 7. 8 mm Cell # 24 Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 8/20

Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 9/20

Cell #1_t = 4 mm: DDS_HPA Cell #24_t = 3 mm: DDS_HPA Rc vg Q R’/Q mm (%c) -- kΩ/m 6. 8 1. 7 6129 10. 217 6. 8 0. 4 6574 14. 364 7. 3 1. 7 6194 10. 205 7. 3 0. 4 6623 14. 347 7. 8 1. 7 6227 10. 185 7. 8 0. 4 6664 14. 329 DDS_A_ t: 4 – 1. 47 mm DDS_A @ HPA _ t: 4 – 1. 47 mm Cell vg Q R’/Q # (%c) -- kΩ/m 1 2 5020 10. 179 1 1. 71 6486 10. 215 24 1 6534 18. 130 24 0. 78 7546 15. 608 Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 10/20

Fundamental mode properties Mc= 14 mm, Mr= 2 mm, Rc= 6. 8 mm, W=1. 5 mm, H= 3 mm, R=0. 5 mm Cell # 1 Cell # 24 Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 11/20

Comparison RF parameters Unit DDS_A DDS_HPA 1 DDS_HPA 2 Bunch population 109 4. 2 3. 7 Q (In / Out) - 5020 / 6534 6436/6868 R’ (In / Out) MΩ/m 51 / 118 65. 7/ 98. 6 vg/c (In / Out) % 2. 07 / 1. 0 1. 7 / 0. 4 Pin MW 71 68. 2 65. 3 Eaccmax (L. /Un. L. ) MV/m 105 / 132 111 / 135. 6 109 / 132. 7 ∆Tmaxsur o. K 51 64 62 Emaxsur MV/m 220 234 229 Scmax W/μm 2 6. 75 7. 4 RF-beam efficiency % 23. 5 28. 3 25. 8 Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 12/20

Mc= 14 mm, Mr= 2 mm, Rc= 7. 3 mm, W=1. 5 mm, H= 3 mm, R=0. 5 mm Cell # 1 Vasim Khan Cell # 24 MEW group meeting, Cockcroft Institute 26. 08. 10 13/20

Cell # 1 Cell # 24 Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 14/20

Where is the problem? DDS_A DDS_HPA Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 15/20

Where is the problem? DDS_HPA DDS_A Beam loaded Vasim Khan Unloaded MEW group meeting, Cockcroft Institute 26. 08. 10 16/20

Cell # 24 Rc= 9. 0 mm Rc= 8. 5 mm Cell Rc Q R’/Q Emaxsur/Eacc Hmax/Eac Sc/E 2 acc # mm -- kΩ/m -- m. A/V W/μm 2/(V/m)2 24 9. 0 6965 10. 215 1. 63 3. 0 24 8. 5 6944 15. 608 1. 63 3. 4 3. 0 24 8. 0 6923 10. 215 1. 63 3. 0 24 7. 5 6900 15. 608 1. 63 3. 4 3. 0 Rc= 8. 0 mm Vasim Khan Rc= 7. 5 mm MEW group meeting, Cockcroft Institute 26. 08. 10 17/20

Mc= 14 mm, Mr= 2 mm, Rc= Variable, W=1. 5 mm, H= 3 mm, R=0. 5 mm Cell # 24 Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 18/20

TRANSVRS Dipole bands: 7 cell simulations Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 19/20

Next! • DDS_HPA: Dipole coupling is fixed • DDS_HPA: Excessive H-field/ unloaded gradient to be fixed. . • Possible option is to vary coupling slot i. e Rc without changing other manifold parameters • Mechanically, variable Rc might be little difficult to build but seems the only possible idea as of now! Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 20/20

Summary: CLIC_DDS_A Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 21/20

NLC: H 60 VG 4 SL 17 A Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 22/20

Continued from slide # 7 Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 23/20

Continued from slide # 7 Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 24/20

Continued from slide # 9 Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 25/20

DDS_HPA: Cell # 24 Continued from slide # 7 Vasim Khan MEW group meeting, Cockcroft Institute 26. 08. 10 26/20