Towards Implementation of Laser Engineered Surface Structures for Electron Cloud Mitigation

M. Sitko; V. Baglin; Sergio Calatroni; Paolo Chiggiato; B. Di Girolamo; Elisa Garcia-Tabares Valdivieso; Mauro Taborelli; Amin Abdolvand; David Bajek; Stefan Wackerow; M. Colling; T. J. Jones; P. A. McIntosh

doi:10.18429/JACoW-IPAC2018-TUZGBE3

Towards Implementation of Laser Engineered Surface Structures for Electron Cloud Mitigation

M. Sitko (Lead / Corresponding author), V. Baglin, Sergio Calatroni, Paolo Chiggiato, B. Di Girolamo, Elisa Garcia-Tabares Valdivieso, Mauro Taborelli, Amin Abdolvand, David Bajek, Stefan Wackerow, M. Colling, T. J. Jones, P. A. McIntosh

Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

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Abstract

The LHC operation has proven that the electron cloud could be a significant limiting factor in machine performance, in particular for future High Luminosity LHC (HLLHC) beams. Electron clouds, generated by electron multipacting in the beam pipes, lead to beam-induced heat load in cryogenic systems. Laser Engineered Surface Structures (LESS) is a novel surface treatment, which changes the morphology of the internal surfaces of vacuum chambers. The surface modification results in a reduced secondary electron yield (SEY) and, consequently, in the reduction or eradication of the electron multipacting effects. Low SEY values of the treated surfaces and flexibility in choosing the laser parameters make LESS a promising treatment for future accelerators. LESS can be applied both in new and existing accelerators owing to the possibility of automated insitu treatment. This approach has been developed and optimised for selected LHC beam screens in which the electron cloud has to be mitigated before the HL-LHC upgrade. We will present the latest steps towards the implementation of LESS.

Original language	English
Title of host publication	IPAC 2018
Subtitle of host publication	Proceedings of the 9th International Particle Accelerator Conference
Editors	Shane Koscielniak, Todd Satogata, Volker R. W. Schaa, Jana Thomson
Place of Publication	Geneva
Publisher	JACoW
Pages	1220-1223
Number of pages	4
ISBN (Electronic)	9783954501847
DOIs	https://doi.org/10.18429/JACoW-IPAC2018-TUZGBE3
Publication status	Published - Jun 2018
Event	9th International Particle Accelerator Conference - Vancouver, Canada Duration: 29 Apr 2018 → 4 May 2018 https://ipac18.org/

Conference

Conference	9th International Particle Accelerator Conference
Country/Territory	Canada
City	Vancouver
Period	29/04/18 → 4/05/18
Internet address	https://ipac18.org/

Keywords

electron
laser
vacuum
operation
multipactoring

Access to Document

10.18429/JACoW-IPAC2018-TUZGBE3Licence: CC BY

Final Published VersionFinal published version, 774 KBLicence: CC BY

An Automated Machine Prototype for Vacuum Chamber Inner Wall Laser Treatment for E-cloud Mitigation
Abdolvand, A. (Investigator)
Science and Technology Facilities Council
1/10/16 → 1/01/20
Project: Research

Abdolvand, Amin
- Mechanical and Industrial Engineering - Professor of Functional Materials and Photonics
Person: Academic

Cite this

Sitko, M., Baglin, V., Calatroni, S., Chiggiato, P., Di Girolamo, B., Garcia-Tabares Valdivieso, E., Taborelli, M., Abdolvand, A., Bajek, D., Wackerow, S., Colling, M., Jones, T. J., & McIntosh, P. A. (2018). Towards Implementation of Laser Engineered Surface Structures for Electron Cloud Mitigation. In S. Koscielniak, T. Satogata, V. R. W. Schaa, & J. Thomson (Eds.), IPAC 2018: Proceedings of the 9th International Particle Accelerator Conference (pp. 1220-1223). Article TUZGBE3 JACoW. https://doi.org/10.18429/JACoW-IPAC2018-TUZGBE3

@inproceedings{c5fddecb623f432b87e695157711cb07,

title = "Towards Implementation of Laser Engineered Surface Structures for Electron Cloud Mitigation",

abstract = "The LHC operation has proven that the electron cloud could be a significant limiting factor in machine performance, in particular for future High Luminosity LHC (HLLHC) beams. Electron clouds, generated by electron multipacting in the beam pipes, lead to beam-induced heat load in cryogenic systems. Laser Engineered Surface Structures (LESS) is a novel surface treatment, which changes the morphology of the internal surfaces of vacuum chambers. The surface modification results in a reduced secondary electron yield (SEY) and, consequently, in the reduction or eradication of the electron multipacting effects. Low SEY values of the treated surfaces and flexibility in choosing the laser parameters make LESS a promising treatment for future accelerators. LESS can be applied both in new and existing accelerators owing to the possibility of automated insitu treatment. This approach has been developed and optimised for selected LHC beam screens in which the electron cloud has to be mitigated before the HL-LHC upgrade. We will present the latest steps towards the implementation of LESS.",

keywords = "electron, laser, vacuum, operation, multipactoring",

author = "M. Sitko and V. Baglin and Sergio Calatroni and Paolo Chiggiato and {Di Girolamo}, B. and {Garcia-Tabares Valdivieso}, Elisa and Mauro Taborelli and Amin Abdolvand and David Bajek and Stefan Wackerow and M. Colling and Jones, {T. J.} and McIntosh, {P. A.}",

note = "Funding Information: The LESS project is carried out under the aegis of grant and financial support from the STFC (Grant No. ST/P00086X/1) and CERN Collaboration Agreement (KN3362) between CERN, STFC-ASTeC Daresbury laboratory and the University of Dundee. Copyright: {\textcopyright} 2018 by JACoW, Geneva, Switzerland.; 9th International Particle Accelerator Conference ; Conference date: 29-04-2018 Through 04-05-2018",

year = "2018",

month = jun,

doi = "10.18429/JACoW-IPAC2018-TUZGBE3",

language = "English",

pages = "1220--1223",

editor = "Shane Koscielniak and Todd Satogata and Schaa, {Volker R. W.} and Jana Thomson",

booktitle = "IPAC 2018",

publisher = "JACoW",

url = "https://ipac18.org/",

}

Sitko, M, Baglin, V, Calatroni, S, Chiggiato, P, Di Girolamo, B, Garcia-Tabares Valdivieso, E, Taborelli, M, Abdolvand, A , Bajek, D , Wackerow, S, Colling, M, Jones, TJ & McIntosh, PA 2018, Towards Implementation of Laser Engineered Surface Structures for Electron Cloud Mitigation. in S Koscielniak, T Satogata, VRW Schaa & J Thomson (eds), IPAC 2018: Proceedings of the 9th International Particle Accelerator Conference., TUZGBE3, JACoW, Geneva, pp. 1220-1223, 9th International Particle Accelerator Conference, Vancouver, British Columbia, Canada, 29/04/18. https://doi.org/10.18429/JACoW-IPAC2018-TUZGBE3

Towards Implementation of Laser Engineered Surface Structures for Electron Cloud Mitigation. / Sitko, M. (Lead / Corresponding author); Baglin, V.; Calatroni, Sergio et al.
IPAC 2018: Proceedings of the 9th International Particle Accelerator Conference. ed. / Shane Koscielniak; Todd Satogata; Volker R. W. Schaa; Jana Thomson. Geneva: JACoW, 2018. p. 1220-1223 TUZGBE3.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

TY - GEN

T1 - Towards Implementation of Laser Engineered Surface Structures for Electron Cloud Mitigation

AU - Sitko, M.

AU - Baglin, V.

AU - Calatroni, Sergio

AU - Chiggiato, Paolo

AU - Di Girolamo, B.

AU - Garcia-Tabares Valdivieso, Elisa

AU - Taborelli, Mauro

AU - Abdolvand, Amin

AU - Bajek, David

AU - Wackerow, Stefan

AU - Colling, M.

AU - Jones, T. J.

AU - McIntosh, P. A.

N1 - Funding Information: The LESS project is carried out under the aegis of grant and financial support from the STFC (Grant No. ST/P00086X/1) and CERN Collaboration Agreement (KN3362) between CERN, STFC-ASTeC Daresbury laboratory and the University of Dundee. Copyright: © 2018 by JACoW, Geneva, Switzerland.

PY - 2018/6

Y1 - 2018/6

N2 - The LHC operation has proven that the electron cloud could be a significant limiting factor in machine performance, in particular for future High Luminosity LHC (HLLHC) beams. Electron clouds, generated by electron multipacting in the beam pipes, lead to beam-induced heat load in cryogenic systems. Laser Engineered Surface Structures (LESS) is a novel surface treatment, which changes the morphology of the internal surfaces of vacuum chambers. The surface modification results in a reduced secondary electron yield (SEY) and, consequently, in the reduction or eradication of the electron multipacting effects. Low SEY values of the treated surfaces and flexibility in choosing the laser parameters make LESS a promising treatment for future accelerators. LESS can be applied both in new and existing accelerators owing to the possibility of automated insitu treatment. This approach has been developed and optimised for selected LHC beam screens in which the electron cloud has to be mitigated before the HL-LHC upgrade. We will present the latest steps towards the implementation of LESS.

AB - The LHC operation has proven that the electron cloud could be a significant limiting factor in machine performance, in particular for future High Luminosity LHC (HLLHC) beams. Electron clouds, generated by electron multipacting in the beam pipes, lead to beam-induced heat load in cryogenic systems. Laser Engineered Surface Structures (LESS) is a novel surface treatment, which changes the morphology of the internal surfaces of vacuum chambers. The surface modification results in a reduced secondary electron yield (SEY) and, consequently, in the reduction or eradication of the electron multipacting effects. Low SEY values of the treated surfaces and flexibility in choosing the laser parameters make LESS a promising treatment for future accelerators. LESS can be applied both in new and existing accelerators owing to the possibility of automated insitu treatment. This approach has been developed and optimised for selected LHC beam screens in which the electron cloud has to be mitigated before the HL-LHC upgrade. We will present the latest steps towards the implementation of LESS.

KW - electron

KW - laser

KW - vacuum

KW - operation

KW - multipactoring

U2 - 10.18429/JACoW-IPAC2018-TUZGBE3

DO - 10.18429/JACoW-IPAC2018-TUZGBE3

M3 - Conference contribution

SP - 1220

EP - 1223

BT - IPAC 2018

A2 - Koscielniak, Shane

A2 - Satogata, Todd

A2 - Schaa, Volker R. W.

A2 - Thomson, Jana

PB - JACoW

CY - Geneva

T2 - 9th International Particle Accelerator Conference

Y2 - 29 April 2018 through 4 May 2018

ER -

Sitko M, Baglin V, Calatroni S, Chiggiato P, Di Girolamo B, Garcia-Tabares Valdivieso E et al. Towards Implementation of Laser Engineered Surface Structures for Electron Cloud Mitigation. In Koscielniak S, Satogata T, Schaa VRW, Thomson J, editors, IPAC 2018: Proceedings of the 9th International Particle Accelerator Conference. Geneva: JACoW. 2018. p. 1220-1223. TUZGBE3 doi: 10.18429/JACoW-IPAC2018-TUZGBE3

Towards Implementation of Laser Engineered Surface Structures for Electron Cloud Mitigation

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Keywords

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An Automated Machine Prototype for Vacuum Chamber Inner Wall Laser Treatment for E-cloud Mitigation

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Abdolvand, Amin

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