clic_dds study
DESCRIPTION
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 PresentationTRANSCRIPT
Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 1/13
CLIC_DDS study 30.11.2010
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
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?
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!
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
Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 6/13
CLIC_DDS optimisation: E-field
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
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%
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
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
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
Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 12/13
Profileaccuracy
VDL
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
Vasim Khan X-Band RF Structures, Beam Dynamics and Sources Workshop, Cockcroft Institute 30.11.10 14/13
Additional slides