CLIC DR collaboration page

This is a page for exchange information on the CLIC Damping Rings (DR) and Pre-Damping Rings (PDR) between the CLIC DR group.

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Pre-damping Rings parameters

Parameter [Unit] Value (2GHz) Value (1GHz)
Energy [GeV] 2.86
Circunference [m] 389.15
Number of trains 1 2
Bunches per train 312 156
Bunch spacing [ns] 0.5 1
Bunch population [109] 4.5
Basic cell type TME
Number of dipoles 38
Dipole field [T] 1.2
Transverse tunes (h/v) 16.39/12.26
Synchrotron tune 0.071 0.051
Natural chromaticity (h/v) -19.0/-22.9
Norm. equilib. Hor. Emittance [mm mrad] 54
Damping times (h/v/l) [ms] 2.7/2.7/1.3
Mom. compaction factor [10-3] 3.72
Energy loss per turn [MeV] 2.75
Harmonic Number 2596 1298
RF Frequency [GHz] 2 1
RF Voltage [MV] 10
RF acceptance [%] 1.2 1.7
Equil. energy spread (rms) [%] 0.1
Equil. bunch length (rms) [mm] 3.2 4.6
Number of wigglers 36
Wiggler peak field [T] 1.9
Wiggler length [m] 3
Wiggler period [cm] 30

Lattice files

Current lattice: PDR-ACE-1GHz.seq

Damping Rings parameters

Parameter [Unit] Value (2GHz) Value (1GHz)
Energy [GeV] 2.86
Circunference [m] 427.5
Number of trains 1 2
Bunches per train 312 156
Bunch spacing [ns] 0.5 1
Bunch population [109] 4.07
Basic cell type TME
Number of dipoles 100
Dipole field [T] 1.0
Transverse tunes (h/v) 48.38/10.39
Synchrotron tune 0.0065 0.0057
Natural chromaticity (h/v) -115/-85
Norm. H/V Emittance (including IBS) [nm.rad] 472/4.8 456/4.8
Damping times (h/v/l) [ms] 2.0/2.0/1.0
Mom. compaction factor [10-4] 1.3
Energy loss per turn [MeV] 3.98
Harmonic Number 2851 1425
RF Frequency [GHz] 2 1
RF Voltage [MV] 4.5 5.1
RF acceptance [%] 1.0 2.4
RMS energy spread (including IBS) [%] 0.1
RMS bunch length (including IBS) [mm] 1.6 1.8
Number of wigglers 52
Wiggler peak field [T] 2.5
Wiggler length [m] 2
Wiggler period [cm] 5

Lattice files

Current lattice: DR_CDR_1GHz.seq

Magnet Lists

MagnetLists.xls: Magnet lists for DR and PDR

Software tools

The lattice design tool used is MadX, available from MadX produces as output

  • a flat lattice description in a madx input language (.seq files). No drift, no lines, basically a set of variables and element declaration and a sequence of elements with their s position.
  • a flat table file (.tfs files) that includes either element parameters (including drifts) and optics function or element name and assigned magnetic error and misalignments.

People and their main interests

  • Y. Papaphilippou, CERN, Design coordination, lattice, non-linear dynamics
  • G. Rumolo, CERN, Collective effects
  • H. Schmickler, CERN, CLIC Technical systems activity leader
  • D. Schulte, CERN, CLIC Beam dynamics activity leader
  • A. Grudiev, CERN, RF design
  • F. Antoniou, CERN and NTUA, Pre-damping ring design, lattice design, Intrabeam Scattering
  • E. Koukovini-Platia, CERN and EPFL, Impedance budgets, instability simulations
  • Y. Renier, Non-linear dynamics
  • A. Vivoli, CERN, Intrabeam Scattering simulations
  • P. Zisopoulos, CERN and UoA, Delay loop design
  • E. Levichev, BINP, Lattice design, space charge
  • D. Shatilov, BINP, Lattice design, space charge
  • S. Siniatkin, BINP, Lattice design, space charge
  • S. Piminov, BINP, Lattice design, space charge
  • D. Schoerling, CERN and TUBF, Wiggler design
  • A. Bernhard, KIT, Wiggler design
  • A. Bragin,BINP, Wiggler design
  • M. Karppinen, CERN, Wiggler design
  • R. Maccaferri,CERN (retired), Wiggler design
  • P. Peiffer, KIT, Wiggler design 3
  • R. Rossmanith, KIT (retired), Wiggler design
  • S. Russenschuck, CERN, Wiggler design
  • P. Vobly, BINP, Magnet and wiggler design
  • K. Zolotarev, BINP, Wiggler design, absorption systems
  • M. Modena, CERN, Magnet design
  • A. Perin, CERN, Cryogenics
  • M. Barnes, CERN, Kicker systems
  • S. Calatroni, CERN, Chamber coatings
  • P. Chiggiatto, CERN, Vacuum technology, coatings
  • T. Lefevre, CERN, Beam instrumentation
  • G. Vandoni, CERN, Vacuum
  • F. Zimmermann, CERN, Coherent Synchrotron Radiation
  • K. Wooton, ACAS, Low emittance tuning
  • B. Godard, CERN, Beam transfer systems
  • F. Toral, CIEMAT, Kicker design
  • M. Palmer, Cornell, CESRTA experiments
  • A. Faus-Golfe, IFIC-Valencia, Kicker design
  • A. Anderson, Maxlab, Emittance monitor
  • M. Boege, PSI, SLS experiments, (TIARA-SVET)
  • A. Streun, PSI, SLS experiments, (TIARA-SVET)

References and usefull links

Topic attachments
I Attachment History Action Size Date Who Comment
PDFpdf CLIC_PDR_Overview.pdf r1 manage 1251.5 K 2011-04-27 - 14:54 FanouriaAntoniou CLIC Pre-damping Rings Overview, F. Antoniou
Unknown file formatseq DR_CDR_1GHz.seq r2 r1 manage 132.5 K 2013-01-29 - 10:55 FanouriaAntoniou DR lattice for the 1GHz option (CDR version)
Microsoft Excel Spreadsheetxls MagnetLists.xls r1 manage 17.0 K 2011-04-27 - 15:11 FanouriaAntoniou Magnet lists for DR and PDR
PDFpdf P.Zisopoulos-16052012.pdf r1 manage 1719.2 K 2012-05-30 - 08:57 FanouriaAntoniou Isochronicity conditions for the CLIC DR Delay Ring, P. Zisopoulos
Unknown file formatseq PDR-ACE-1GHz.seq r1 manage 34.3 K 2011-04-27 - 15:06 FanouriaAntoniou  
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Topic revision: r13 - 2013-06-17 - FanouriaAntoniou
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