Secondary electron yield measurements from thin surface coatings for NLC electron cloud reduction

Le Pimpec, F

doi:10.2172/826924

Title: Secondary electron yield measurements from thin surface coatings for NLC electron cloud reduction

Full Record
Other Related Research

Abstract

In the beam pipe of the positron damping ring of the Next Linear Collider, electrons will be created by beam interaction with the surrounding vacuum chamber wall and give rise to an electron cloud. Several solutions are possible for avoiding the electron cloud, without changing the beam bunch structure or the diameter of the vacuum chamber. Some of the currently available solutions for preventing this spurious electron load include reducing residual gas ionization by the beam, minimizing beam photon-induced electron production, and lowering the secondary electron yield (SEY) of the chamber wall. We will report on recent SEY measurements performed at SLAC on TiN coatings and TiZrV non-evaporable getter thin films.

Authors:: Le Pimpec, F

Publication Date:: Mon May 17 00:00:00 EDT 2004

Research Org.:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Org.:: USDOE Office of Science (US)

OSTI Identifier:: 826924

Report Number(s):: SLAC-PUB-10438
TRN: US0404696

DOE Contract Number:: AC03-76SF00515

Resource Type:: Technical Report

Resource Relation:: Other Information: PBD: 17 May 2004

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS; CLOUDS; COATINGS; DAMPING; ELECTRONS; GETTERS; IONIZATION; LINEAR COLLIDERS; POSITRONS; PRODUCTION; STANFORD LINEAR ACCELERATOR CENTER; SURFACE COATING; THIN FILMS

Citation Formats


                    Le Pimpec, F. Secondary electron yield measurements from thin surface coatings for NLC electron cloud reduction.  United States: N. p., 2004. 
        Web.  doi:10.2172/826924.

Copy to clipboard


                    Le Pimpec, F. Secondary electron yield measurements from thin surface coatings for NLC electron cloud reduction.  United States.  https://doi.org/10.2172/826924

Copy to clipboard


                    Le Pimpec, F. 2004.  
        "Secondary electron yield measurements from thin surface coatings for NLC electron cloud reduction".  United States.  https://doi.org/10.2172/826924.  https://www.osti.gov/servlets/purl/826924.

Copy to clipboard


                    
@article{osti_826924,

  title        = {Secondary electron yield measurements from thin surface coatings for NLC electron cloud reduction},

  author       = {Le Pimpec, F},

  abstractNote = {In the beam pipe of the positron damping ring of the Next Linear Collider, electrons will be created by beam interaction with the surrounding vacuum chamber wall and give rise to an electron cloud. Several solutions are possible for avoiding the electron cloud, without changing the beam bunch structure or the diameter of the vacuum chamber. Some of the currently available solutions for preventing this spurious electron load include reducing residual gas ionization by the beam, minimizing beam photon-induced electron production, and lowering the secondary electron yield (SEY) of the chamber wall. We will report on recent SEY measurements performed at SLAC on TiN coatings and TiZrV non-evaporable getter thin films.},

  doi          = {10.2172/826924},

  url          = {https://www.osti.gov/biblio/826924},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Mon May 17 00:00:00 EDT 2004},

  month        = {Mon May 17 00:00:00 EDT 2004}

}

Copy to clipboard

Technical Report:

View Technical Report

https://doi.org/10.2172/826924

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Secondary Electron Yield Measurements of TiN coating and TiZrV getter film(LCC-128)

Technical Report Le Pimpec, F

In the beam pipe of the positron Main Damping Ring (MDR) of the Next Linear Collider (NLC), ionization of residual gases and secondary electron emission give rise to an electron cloud which can cause the loss of the circulating beam. One path to avoid the electron cloud is to ensure that the vacuum wall has low secondary emission yield and, therefore, we need to know the secondary emission yield (SEY) for candidate wall coatings. We report on SEY measurements at SLAC on titanium nitride (TiN) and titanium-zirconium-vanadium (TiZrV) thin sputter deposited films, as well as describe our experimental setup.
https://doi.org/10.2172/826502

Full Text Available
A Continuing Story on the Secondary Electron Yield Measurements of TiN Coating and TiZrV Getter Film

Technical Report Le Pimpec, F

In the beam pipe of the positron Main Damping Ring (MDR) of the Next Linear Collider (NLC), ionization of residual gases and secondary electron emission will give rise to an electron cloud which can cause the loss of the circulating beam. One path to avoid the electron cloud is to ensure that the vacuum wall has low secondary emission yield and, therefore, we need to know the secondary emission yield (SEY) for candidate wall coatings. We report on the ongoing SEY measurements at SLAC on titanium nitride (TiN) and titanium-zirconium-vanadium (TiZrV) thin sputter-deposited films, as well as their effects onmore » simulations.« less
https://doi.org/10.2172/827021

Full Text Available
Secondary Electron Yield and Groove Chamber Tests in PEP-II

Conference Le Pimpec, F; Kirby, R; Markiewicz, Thomas; ... - Conf.Proc.C070625:1997,2007

Possible remedies for the electron cloud in positron damping ring (DR) of the International Linear Collider (ILC) includes thin-film coatings, surface conditioning, photon antechamber, clearing electrodes and chamber with grooves or slots [1]. We installed chambers in the PEP-II Low Energy Ring (LER) to monitor the secondary electron yield (SEY) of TiN, TiZrV (NEG) and technical accelerator materials under the effect of electron and photon conditioning in situ. We have also installed chambers with rectangular grooves in straight sections to test this possible mitigation technique. In this paper, we describe the ILC R&D ongoing effort at SLAC to reduce themore »« less
Full Text Available
TiN and TiZrV Thin Film as a Remedy Against Electron Cloud

Technical Report Le Pimpec, F

In many accelerators running positively charged beams, ionization of residual gas and secondary electron emission in the beam pipe will give rise to an electron cloud which can cause beam blow-up or the loss of the circulating beam. One solution to avoid the electron cloud is to ensure that the vacuum wall has low secondary emission yield (SEY). The SEY of thin films of TiN and sputter-deposited non-evaporable getter were measured for a variety of conditions, including the effect of recontamination in an ultra high vacuum environment. This last process has a different effect on SEY than direct dosing withmore »« less
https://doi.org/10.2172/839756

Full Text Available
The Effect of Gas Ion Bombardment on the Secondary Electron Yield of TiN, TiCN and TiZrV Coatings For Suppressing Collective Electron Effects in Storage Rings

Technical Report Le Pimpec, F.; Kirby, R.; King, F.; ...

In many accelerator storage rings running positively charged beams, ionization of residual gas and secondary electron emission (SEE) in the beam pipe will give rise to an electron cloud which can cause beam blow-up or loss of the circulating beam. A preventative measure that suppresses electron cloud formation is to ensure that the vacuum wall has a low secondary emission yield (SEY). The SEY of thin films of TiN, sputter deposited Non-Evaporable Getters and a novel TiCN alloy were measured under a variety of conditions, including the effect of re-contamination from residual gas.
https://doi.org/10.2172/875817

Full Text Available

Similar Records