clic_dds study

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Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 1/13 CLIC_DDS study 30.11.2010

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CLIC_DDS study. 30.11.2010. CLIC_DDS Study Collaboration. Vasim Khan Alessandro D’Elia Roger Jones. University of Manchester and Cockcroft institute, U.K. CERN, Switzerland. Alexej Grudiev Germana Riddone Vadim Soldatov Walter Wuensch Riccardo Zennaro. Summary of CLIC_DDS_C. - PowerPoint PPT Presentation

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Page 1: CLIC_DDS study

Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 1/13

CLIC_DDS study 30.11.2010

Page 2: CLIC_DDS study

Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 2/13

CLIC_DDS Study Collaboration

• Vasim Khan

• Alessandro D’Elia

• Roger Jones

• Alexej Grudiev

• Germana Riddone

• Vadim Soldatov

• Walter Wuensch

• Riccardo Zennaro

University of Manchester and Cockcroft institute, U.K.

CERN, Switzerland

Page 3: CLIC_DDS study

Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 3/13

192 cells8-fold interleaving

24 cellsNo interleaving

192 cells8-fold interleaving

Manifold

Coupling slot

Dipole mode Manifold mode

∆fmin = 65 MHz∆tmax =15.38 ns∆s = 4.61 m

∆fmin = 8.12 MHz∆tmax =123 ns∆s = 36.92 m

∆f=3.6 σ =2.3 GHz∆f/fc=13.75%

Summary of CLIC_DDS_C

Meets design Criterion?

Page 4: CLIC_DDS study

Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 4/13

Surface fields

Fail to satisfy rf breakdown constraints!

Page 5: CLIC_DDS study

Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 5/13

CLIC_DDS optimisation: H-fieldCircular

Circular cell

ε=0.82

ε=1.38

Manifold-damped single cell

ε=1.38

Page 6: CLIC_DDS study

Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 6/13

CLIC_DDS optimisation: E-field

Page 7: CLIC_DDS study

Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 7/13

Surface fields

DDS_E

DDS_C

DDS_E

DDS_C

Page 8: CLIC_DDS study

Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 8/13

CLIC_DDS_A: Monopole properties

Max. Values

Esur=220 MV/m∆T = 51 KPin= 70.8Eacc_UL=131 MV/mSc=6.75 W/μm2

RF-beam-eff=23.5%

∆T

35*Sc

Esur

Eacc

Pin

Dashed curves : Unloaded conditionSolid curves: Beam loaded condition

CLIC_G Values

Esur=240 MV/m∆T = 51 deg.Pin= 63.8Eacc_UL=128 MV/mSc=5.4 W/μm2

RF-beam-eff=27.7%

Page 9: CLIC_DDS study

Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 9/13

CLIC_DDS_A: Dipole properties24 cellsNo interleaving

Qavg ~1700

Page 10: CLIC_DDS study

Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 10/13

CLIC_DDS_A: 24+2 cells

198.6326mm

Page 11: CLIC_DDS study

Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 11/13

Water pipes for cooling Vacuum flange

Vacuum flangePower input

Power outputTuning holes

Cut-view

Beam

Thanks to Vadim Soldatov

Page 12: CLIC_DDS study

Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 12/13

Profileaccuracy

VDL

Page 13: CLIC_DDS study

Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 13/13

Acknowledgments

• We have benefited from discussions with Juwen Wang, Zhengai Li and Toshiyasu Higo on X-band structures

Thank you

Closing remarks

• CLIC_DDS_A is being fabricated

• CLIC_DDS_A: High power test by 2011 end

Page 14: CLIC_DDS study

Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 14/13

Additional slides