The 31st ICFA Advanced Beam Dynamics Workshop on Electron-Cloud Effects "ECLOUD'04"

http://icfa-ecloud04.web.cern.ch/icfa-ecloud04/

 

Napa Embassy Suites Hotel

Napa, California, 19-23 April, 2004

 

Sponsored by: the ICFA Beam Dynamics Panel, LBNL, CERN and ORNL/SNS

 

PROCEEDINGS

 

 

Session A: Observations at Existing Accelerators

Chair: M. Blaskiewicz; Secretary: J. Byrd

R. Gough, Welcome

M. Furman, Goals for the Workshop

S. Y. Zhang and T. Roser, Summary of Pressure Rise Workshop

K. Harkay, Electron Cloud Observations: A Retrospective

H. Fukuma, Electron Cloud Effects in the KEKB LER

A. Kulikov, A. Novokhatski and J. Seeman, Suppression of the Beam Instability Related to the Electron Cloud at PEP-II B-factory

J. Q. Wang, Z. Y. Guo, Y. D. Liu, Q. Qin, J. Xing and Z. Zhao, The Electron Cloud Instability Studies in the BEPC

G. Arduini, T. Bohl, K. Cornelis, W. Hšfle, E. MŽtral, F. Zimmermann, Beam Observations With Electron Cloud in the CERN PS & SPS Complex

 

Session B: More Observations at Existing Accelerators and Concerns

for Future Machines

Chair: K. Harkay; Secretary: V. Baglin

J. M. JimŽnez, Electron Cloud and Vacuum Effects in the SPS (abstract)

A. Novokhatski, Experimental and Simulation Studies of Electron Cloud Multipacting in the Presence of Small Solenoidal Fields (this paper got combined with the article by Kulikov et. al., Session A above)  (abstract here)

W. Fischer, M. Blaskiewicz, P. He, H. Huang, H. C. Hseuh, U. Iriso, G. Rumolo, L. Smart, D. Trbojevic and S. Y. Zhang, Electron Clouds and Vacuum Pressure Rise in RHIC

A. W. Molvik, R. H. Cohen, A. Friedman, M. Kireeff-Covo, S. M. Lund, P. A. Seidl, F. M. Bieniosek, A. Faltens and L. Prost, Experimental studies of electron and gas sources in a heavy-ion beam

R. J. Macek, A. A. Browman, M. J. Borden, D. H. Fitzgerald, R. C. McCrady, T. Spickermann and T. J. Zaugg, Status of Experimental Studies of Electron Cloud Effects at the Los Alamos Proton Storage Ring

T. Toyama and the e-cloud study team, Electron Cloud Effects in the J-PARC Rings and Related Topics

E. Benedetto and F. Zimmermann, Analysis of the Electron Pinch during a Bunch Passage

T. Kroyer, F. Caspers, W. Hšfle, J. M. JimŽnez, J.-F. Malo, J. TŸckmantel, Unexpected Results on Microwave Waveguide Mode Transmission Measurements in the SPS Beam Pipe

 

Session C: Surface Properties, Measurements and Treatments

Chair: M. Pivi; Secretary: F. Le Pimpec

G. Rumolo, O. Boine-Frankenheim, E. Mustafin and I. Hofmann, Vacuum and Electron Cloud Issues at the GSI Present and Future Facilities

R. Cimino, Surface-Related Properties as an Essential Ingredient to e-cloud Simulations

R. Kirby, Instrumental Effects in Secondary Electron Yield and Energy Distribution Measurements

A. Rossi, SEY and Electron Cloud Build-Up With NEG Materials

H. Hseuh, M. Blaskiewicz, P. He, M. Mapes, R. Todd, L. Wang, J. Wei and S. Y. Zhang, Design and Implementation of SNS Accumulator Ring Vacuum System with Suppression of Electron Cloud Instability

V. Baglin and B. Jenninger, Pressure and Heat Load in a LHC Type Cryogenic Vacuum System Subjected to an Electron Cloud

G. Stupakov and M. Pivi, Suppression of the Effective SEY for a Grooved Metal Surface

 

Session D: Simulations of E-Cloud Buildup I

Chair: G. Rumolo; Secretary: Y. Cai

D. Schulte and F. Zimmermann, Electron Cloud Build-Up Simulations with ECLOUD

A. Adelmann, M. A. Furman and Ch. Pflaum, Numerical and Computational Methods in Electron Cloud Simulations: Present and Future (abstract)

M. Pivi, Overview and Actual Understanding of the Electron Cloud Effects and Instabilities in Future Linear Colliders

R. Wanzenberg, Prediction of Electron Cloud Effects in the Synchrotron Light Source PETRA III

C. Vaccarezza, M. Biagini, R. Cimino, A. Clozza, A. Drago, S. Guiducci and M. Zobov, Experimental Observations and e-cloud Simulations at DAFNE

D. Schulte, R. Wanzenberg and F. Zimmermann, Electron Cloud Effects in the TESLA and CLIC Positron Damping Rings

J.-L. Vay, M. A. Furman, A. W. Azevedo, R. H. Cohen, A. Friedman, D. P. Grote and P. H. Stoltz, Status Report on the Merging of Electron-Cloud Code POSINST with the 3-D Accelerator PIC Code WARP

G. Bellodi, Simulation of Electron Cloud Build-Up in the ISIS Proton Synchrotron and Related Machines

S. Heifets, Effect of the Beam Instability on the Density of the Cloud. Secondary Yield in the Presence of the Beam

 

Session E: Simulations of E-Cloud Buildup II

Chair: D. Schulte; Secretary: J.-L. Vay

L. Wang, M. Blaskiewicz, H. Hseuh, P. He, Y. Y. Lee, D. Raparia, J. Wei, S.Y. Zhang, Multipacting and Remedies of Electron Cloud in Long-Bunch Proton Machine

A. Shishlo, Y. Sato, J. Holmes, S. Danilov, S. Henderson, Electron-Cloud Module for the ORBIT Code

Y. Sato, A. Shishlo, S. Danilov, J. Holmes, S. Henderson, Simulation of e-cloud Using ORBIT: Benchmarks and First Application

L. Wang, A. Chao and H. Fukuma, Energy Spectrum of an Electron Cloud with Short Bunches

L. Wang, S. Kurokawa, H. Fukuma, S. S. Win and A. Chao, Solenoid Effects on an Electron Cloud

R. Cohen, A. Friedman, S. M. Lund, A. W. Molvik, E. P. Lee, A. Azevedo, J.-L. Vay, P. Stoltz and S. Veitzer, Modeling Electron-Cloud Effects in Heavy Ion Accelerators

P. Stoltz, S. Veitzer, R. Cohen, A. Molvik and J.-L. Vay, The CMEE Library for Numerical Modeling of Electron Effects

U. Iriso and S. Peggs, Use of Maps in the Exploration of Electron Cloud Parameter Space

 

Session F1: Theory and Simulations of Electron Cloud Instabilities I

Chair: A. Wolski; Secretary: G. Arduini

F. Zimmermann, Review of Single-Bunch Instabilities Driven by an Electron Cloud

K. Ohmi and S. S. Win, Study of Coupled-Bunch Instability Caused by Electron Cloud

A. Ghalam, T. Katsouleas, C. Huang, V. Decyk, W. Mori and G. Rumolo, 3-D Parallel Simulation Model of Continuous Beam-Cloud Interactions

E. Benedetto, D. Schulte, F. Zimmermann and G. Rumolo, Simulation of Transverse Single Bunch Instabilities and Emittance Growth caused by Electron Cloud in LHC and SPS

E. Perevedentsev,  Extending Possibilities of Analyzing the Electron Cloud Effect on Beam Stability (abstract)

 

Session F2: Theory and Simulations of Electron Cloud Instabilities II

 and other topics

Chair: F. Zimmermann; Secretary: W. Fischer

K. Y. Ng, Possible Ion Trapping in Recycler Ring

K. Ohmi, T. Toyama and G. Rumolo, Electron Cloud Instability for a Coasting Proton Beam in Circular Accelerators

K. Cornelis, Interplay of Electron Cloud and Impedance in an Analytical Model (abstract)

M. Blaskiewicz, Instability Dynamics with Electron Cloud Buildup in Long Bunches

Hong Qin, Ronald C. Davidson, and Edward A. Startsev, Delta-f Simulations of Electron-Ion Two-Stream Instability (abstract)

A. Drees, U. Iriso-Ariz and W. Fischer, Correlation of Pressure Rise and Experimental Backgrounds at RHIC in Run04 (abstract)

K. Ohmi, Electron Cloud Effect in Damping Rings of Linear Colliders

Tai-Sen F. Wang, Paul J. Channell, Robert J. Macek and Ronald C. Davidson, Centroid Theory of Transverse Electron-Proton Two-Stream Instability in a Long Proton Bunch Revisited

 

Session G: Panel Discussion on Future Needs and Future Directions

Chair and panel moderator: R. Macek; Secretary: A. Drees

Panel: J. Seeman, K. Ohmi, H. Fukuma, F. Zimmermann, M. JimŽnez, R. Cimino, G. Rumolo, S. Henderson, A. Molvik and S. Y. Zhang.

R. Macek, Summary of the Panel Discussion

 

Session H: Summaries

Chair: C. Prior; Secretary: G. Bellodi

M. Blaskiewicz, Session A summary

K. Harkay, Session B summary

M. Pivi, Session C summary

G. Rumolo, Session D summary

D. Schulte, Session E summary

A. Wolski and F. Zimmermann, Session F1 and F2 summary

M. Furman, Concluding Remarks