Longitudinal Impedance Budget from LINAC to SASE2 Igor Zagorodnov Beam Dynamics Group Meeting 13.11.06.

Slides:

Advertisements

Similar presentations

Compression Scenarios for the European XFEL Charge and Bunch Length Scope Igor Zagorodnov 1st Meeting of the European XFEL Accelerator Consortium DESY,

Advertisements

Wakefield Calculations and Impedance Database Challenges for the European XFEL Project at DESY Igor Zagorodnov ICFA mini-Workshop on “Electromagnetic wake.

Institut Theorie Elektromagnetischer Felder Technische Universität Darmstadt, Fachbereich Elektrotechnik und Informationstechnik Schloßgartenstr. 8,

FLASH Simulations SASE Killer Igor Zagorodnov S2E Meeting DESY 24 June 2014.

RF aspects of module vacuum system Riccardo Zennaro CERN.

1 Optimal focusing lattice for XFEL undulators: Numerical simulations Vitali Khachatryan, Artur Tarloyan CANDLE, DESY/MPY

W. Decking, B. Faatz, C. Gruen, M. Hϋning, J. Kahl, J. Klute, K. Mϋller, F. Obier, J. Wortmann FEL Beam Dynamics Meeting, Flat Top Pulser for.

Impedance Budget from LINAC to SASE2 Igor Zagorodnov Beam Dynamics Group Meeting

Hard X-ray FELs (Overview) Zhirong Huang March 6, 2012 FLS2012 Workshop, Jefferson Lab.

Performance Analysis Using Genesis 1.3 Sven Reiche LCLS Undulator Parameter Workshop Argonne National Laboratory 10/24/03.

MERLIN 3.0 only considers first order (dipole) modes. Kick is linearly proportional to offset. For offsets close to the axis this is a reasonable approximation.

Karl Bane AC Wake--Measurement, April 7-8, Resistive Wall Wakes in the Undulator Beam Pipe – Theory, Measurement Karl.

Z. Huang LCLS FAC April Effect of AC RW Wake on SASE - Analytical Treatment Z. Huang, G. Stupakov see SLAC-PUB-10863, to.

The Compendium of formulae of kick factor. PLACET - ESA collimation simulation. Adina Toader School of Physics and Astronomy, University of Manchester.

Karl L. Bane AC Impedance, October 12-13, 2004 Resistive Wall Wakes in the Undulator Beam Pipe; Implications Karl Bane.

F Specifications for the dark current kicker for the NML test facility at Fermilab S. Nagaitsev, M. Church, P. Piot, C.Y. Tan, J. Steimel Fermilab May.

FEL Beam Dynami cs FEL Beam Dynamics T. Limberg FEL driver linac operation with very short electron bunches.

Design of the Photon Collimators for the ILC Positron Helical Undulator Adriana Bungau The University of Manchester Positron Source Meeting, July 2008.

FEL simulation code FAST Free-Electron Laser at the TESLA Test Facility Generic name FAST stands for a set of codes for ``full physics'' analysis of FEL.

Beam dynamics on damping rings and beam-beam interaction Dec 포항 가속기 연구소 김 은 산.

Impedance Calculation and Minimisation for Low Emittance Rings(LERs)

Winni Decking XFEL Beam Collimation and Switchyard Review Introduction FEL-Beam-Dynamics Group

Update of the SPS transverse impedance model Benoit for the impedance team.

Wakefields in XFEL undulator intersections Igor Zagorodnov Beam Dynamics Group Meeting

B. FaatzS2E workshop, August 18-22, XFEL simulations with GENESIS Outline: Undulator layout (real/simulated) Matching Genesis.

Beam Dynamics and FEL Simulations for FLASH Igor Zagorodnov and Martin Dohlus Beam Dynamics Meeting, DESY.

G4Beamline Simulated Electron Distribution within the HPRF Cavity 2/15/20121.

Collimator wakefields - G.Kurevlev Manchester 1 Collimator wake-fields Wake fields in collimators General information Types of wake potentials.

Collimation for the Linear Collider, Daresbury.1 Adam Mercer, German Kurevlev, Roger Barlow Simulation of Halo Collimation in BDS.

Trapped Modes in LHC Collimator (II) Liling Xiao Advanced Computations Department SLAC National Accelerator Laboratory.

Kiyoshi Kubo Electron beam in undulators of e+ source - Emittance and orbit angle with quad misalignment and corrections - Effect of beam pipe.

Resistive Effects in XFEL Kicker Andranik Tsakanian XFEL Beam Dynamic Meeting 17 Dec 2007.

Impedance Budget Database Olga Zagorodnova BD meeting, DESY.

Coupler Short-Range Wakefield Kicks Karl Bane and Igor Zagorodnov Wake Fest 07, 11 December 2007 Thanks to M. Dohlus; and to Z. Li, and other participants.

Long Range Wake Potential of BPM in Undulator Section Igor Zagorodnov and Martin Dohlus Beam Dynamics Group Meeting

BEAMLINE HOM ABSORBER O. Nezhevenko, S. Nagaitsev, N. Solyak, V. Yakovlev Fermi National Laboratory December 11, 2007 Wake Fest 07 - ILC wakefield workshop.

Collimator Wakefields Igor Zagorodnov BDGM, DESY

Genesis /ALICE Benchmarking Igor Zagorodnov Beam Dynamics Group Meeting

Computational Needs for the XFEL Martin Dohlus DESY, Hamburg.

A single-shot method for measuring fs bunches in linac-based FELs Z. Huang, K. Bane, Y. Ding, P. Emma.

Bunch Shaping for Future Dielectric Wakefield Accelerators W. Gai Mini-Workshop on Deflecting/Crabbing RF Cavity Research and application in Accelerators.

Geometric Impedance of LHC Collimators O. Frasciello, S. Tomassini, M. Zobov LNF-INFN Frascati, Italy With contributions and help of N.Mounet (CERN), A.Grudiev.

Resistive Effects in Ceramic Kicker Chamber. Roughness Effects in Undulator Chamber. Andranik Tsakanian, Uni Hamburg DESY, 16 April 2007.

Impedance & Instabilities

Review of High Frequency Impedance

For Discussion Possible Beam Dynamics Issues in ILC downstream of Damping Ring LCWS2015 K. Kubo.

Cutting Beam Horns in BC1

Coupler kick and wake simulations upgrade

Transition Wakes in the 3.9 GHz Cryomodule

UCLA/ATF chicane compression experiments

F. Villa Laboratori Nazionali di Frascati - LNF On behalf of Sparc_lab

Not a Talk, just a contribution to the discussions.

Igor Zagorodnov and Martin Dohlus

Overview Multi Bunch Beam Dynamics at XFEL

Needle Cathodes for RF Guns

Simulation of Monopole modes trapped in LHC collimator

Laser assisted emittance exchange to reduce the X-ray FEL size

UCLA/ATF chicane compression experiments

Collimator Wakefields

Two-bunch self-seeding for narrow-bandwidth hard x-ray FELs

FEL-Beam-Dynamics Group

Simulation of Monopole modes trapped in LHC collimator

Gain Computation Sven Reiche, UCLA April 24, 2002

Introduction Small-angle approximation

Achieving Required Peak Spectral Brightness Relative Performance for Four Undulator Technologies Neil Thompson WP5 – 20/03/19.

Igor Zagorodnov BD meeting, DESY

Linear beam dynamics simulations for XFEL beam distribution system

Impedance of Different Kicker Options

Short-Range Wakes in Elliptical Pipe Geometry

Igor Zagorodnov and Martin Dohlus

Presentation transcript:

Longitudinal Impedance Budget from LINAC to SASE2 Igor Zagorodnov Beam Dynamics Group Meeting

SASE2 SASE1 (W.Decking)

Wakefield sources - Resistance of the pipe (r=25mm, L=456m, Aluminium) - Collimators (r=2mm, L=50cm, 4 items, TIMETAL 6-4 ) - Kickers (r=10mm, L=10m, 3 items, R/L  m )

Collimator (geometrical wake) Diffractive regime: the geometrical wake repeats the bunch shape

TIMETAL 6-4 alloy (Titanium) (E.Schutz MVA) Collimator (resistive wake) M.Dohlus. TESLA , 2001 K.L.F.Bane, G.V.Stupakov, SLAC-PUB-10707, 2004

TIMETAL 6-4 alloy (Titanium) Geom.Res.Total Loss Spread Peak Collimator total resistive bunch

Aluminium resistivetotal Loss Spread Peak Pipe (resistive+oxid layer+roughness) resistive bunch (T.Wohlenberg)

Kicker (geometrical wake) (T.Wohlenberg)

Kicker (resistive wake) (T.Wohlenberg)

Geom.Res.Total Loss Spread Peak Kicker total resistive bunch

Pipe (456m) Collimators (4 items) Kickers (3*10m) Total Loss Spread Peak TOTAL (LINAC to SASE2) collimators pipe bunch kickers

Energy spread due to wakefields between LINAC and SASE 2 bunch before SASE2 after LINAC

Energy losses between LINAC and SASE2 vs. pipe radius R Spread Loss Peak With oxid layer and roughness Geometrical +resistive

undulator pipe (42*5.1m) intersection pipe (41*0.7m) absorbers (41*0.3m items) Total (old geometry)* Loss e41.11e4 Spread e41.89e4 Peak e4-4.0e4 TOTAL (SASE2) undulator pipe bunch absorbers pipe in intersection (T.Wohlenberg) * M. Dohlus et al, TESLA-FEL

Energy spread between LINAC and SASE2 vs. pipe radius R (normalized to the spread in SASE2) Spread total collimators

Conclusion Impact on FEL performance? (spectrum from SASE simulations?) Spread total collimators

Appendix A. Kick factors of flat and round collimators are equal round flat

Appendix A. Kick factors of flat and round collimators are equal round flat =

Appendix A. Kick factors of flat and round collimators are equal round flat Kick of the flat collimator is equal to the kick of the round one = = = 0.5

Appendix B. XFEL collimator vs. cryomodule

b2, mm Kick, V/pC/m 118* * * * * ~6.5 For the bunch with sigma=25mkm the kick from the collimator with apperture b 2 =2mm is equal to the kick of ~700 cryomoduoles Emmitance growth?