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Title: Summary of the ECLOUD'04 Workshop

Abstract

The 31st ICFA Advanced Beam Dynamics Workshop on Electron-Cloud Effects ''ECLOUD'04'' was held April 19-23, 2004 at Napa, CA, USA. A broad range of current topics in this field were illuminated by 53 talks in 7 sessions plus 6 session summaries at the final summary session. These covered a variety of experimental methods and results, along with progress on understanding of the topic obtained from simulations and analytic theory, and evaluations of the effectiveness of various methods/mechanisms for mitigation of the adverse impact on accelerator performance. In addition, a panel discussion was held on ''Future Needs and Future Directions''. A summary of progress on the major themes covered at ECLOUD'04 is presented.

Authors:
;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
843004
Report Number(s):
LBNL-57160; LA-UR-04-8606
TRN: US0503773
DOE Contract Number:
AC03-76SF00098
Resource Type:
Conference
Resource Relation:
Conference: 33rd ICFA Advanced Beam Dynamics Workshop on High Intensity and High Brightness Hadron Beams 'ICFA-HB2004', Bensheim, Germany, Oct. 18-22, 2004
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; ACCELERATORS; BEAM DYNAMICS; BRIGHTNESS; HADRONS; MITIGATION; PERFORMANCE

Citation Formats

Macek, R., and Furman, M. Summary of the ECLOUD'04 Workshop. United States: N. p., 2004. Web.
Macek, R., & Furman, M. Summary of the ECLOUD'04 Workshop. United States.
Macek, R., and Furman, M. Tue . "Summary of the ECLOUD'04 Workshop". United States. doi:. https://www.osti.gov/servlets/purl/843004.
@article{osti_843004,
title = {Summary of the ECLOUD'04 Workshop},
author = {Macek, R. and Furman, M.},
abstractNote = {The 31st ICFA Advanced Beam Dynamics Workshop on Electron-Cloud Effects ''ECLOUD'04'' was held April 19-23, 2004 at Napa, CA, USA. A broad range of current topics in this field were illuminated by 53 talks in 7 sessions plus 6 session summaries at the final summary session. These covered a variety of experimental methods and results, along with progress on understanding of the topic obtained from simulations and analytic theory, and evaluations of the effectiveness of various methods/mechanisms for mitigation of the adverse impact on accelerator performance. In addition, a panel discussion was held on ''Future Needs and Future Directions''. A summary of progress on the major themes covered at ECLOUD'04 is presented.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Nov 30 00:00:00 EST 2004},
month = {Tue Nov 30 00:00:00 EST 2004}
}

Conference:
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  • The 31st ICFA Advanced Beam Dynamics Workshop on Electron-Cloud Effects ''ECLOUD'04'' was held April 19-23, 2004 at Napa, CA, USA. A broad range of current topics in this field were illuminated by 53 talks in 7 sessions plus 6 session summaries at the final summary session. These covered a variety of experimental methods and results, along with progress on understanding of the topic obtained from simulations and analytic theory, and evaluations of the effectiveness of various methods/mechanisms for mitigation of the adverse impact on accelerator performance. In addition, a panel discussion was held on 'Future Needs and Future Directions'. Amore » summary of progress on the major themes covered at ECLOUD'04 is presented.« less
  • The SPS at high intensities exhibits transverse single-bunch instabilities with signatures consistent with an Ecloud driven instability. They present recent MD data from the SPS, details of the instrument technique and spectral analysis methods which help reveal complex vertical motion that develops within a subset of the injected bunch trains. The beam motion is detected via wideband exponential taper striplines and delta-sigma hybrids. The raw sum and difference data is sampled at 50 GHz with 1.8 GHz bandwidth. sliding window FFT techniques and RMS motion techniques show the development of large vertical tune shifts on portions of the bunch ofmore » nearly 0.025 from the base tune of 0.185. Results are presented via spectrograms and bunch slice trajectories to illustrate development of the unstable beam and time scale of development along the injected bunch train. The study shows that the growing unstable motion occupies a very broad frequency band of 1.2 GHz. These measurements are compared to numerical simulation results, and the system parameter implications for an Ecloud feedback system are outlined.« less
  • The SPS at high intensities exhibits transverse single bunch instabilities with signatures consistent with an Ecloud driven instability. We present recent MD data from the SPS, details of the instrument technique and spectral analysis methods which help reveal complex vertical motion that develops within a subset of the injected bunch trains. The beam motion is detected via wideband exponential taper striplines and delta-sigma hybrids. The raw sum and difference data is sampled at 50 GHz with 1.8 GHz bandwidth. Sliding window FFT techniques and RMS motion techniques show the development of large vertical tune shifts on portions of the bunchmore » of nearly 0.025 from the base tune of 0.185. Results are presented via spectrograms and bunch slice trajectories to illustrate development of the unstable beam and time scale of development along the injected bunch train. The study shows that the growing unstable motion occupies a very broad frequency band of 1.2 GHz. These measurements are compared to numerical simulation results, and the system parameter implications for an Ecloud feedback system are outlined.« less