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Title: Measurement and modeling of electron-cloud-induced betatron tune shifts at the Cornell Electron-Positron Storage Ring test accelerator

Abstract

We report on extensive measurements at the Cornell Electron-Positron Storage Ring of electron-cloud-induced betatron tune shifts for trains of positron bunches at 2.1 and 5.3 GeV with bunch populations ranging between 0.64 × 1010 and 9.6 × 1010. Measurements using a witness bunch with variable distance from the end of the train and variable bunch population provide information on cloud decay and cloud pinching during the bunch passage. We employ Monte Carlo simulations of the reflection and absorption of synchrotron radiation photons to determine the pattern of absorption sites around the circumference of the storage ring. The Geant4 simulation toolkit is used to model the interactions of the photons with the beampipe wall and determine the production energy and location distributions of the photoelectrons which seed the electron cloud. An electron cloud buildup model based on fitted ring-averaged secondary-yield properties of the vacuum chamber predicts tune shifts in good agreement with the measurements.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1546833
Alternate Identifier(s):
OSTI ID: 1609271
Grant/Contract Number:  
FC02-08ER41538; SC0006505
Resource Type:
Published Article
Journal Name:
Physical Review Accelerators and Beams
Additional Journal Information:
Journal Name: Physical Review Accelerators and Beams Journal Volume: 22 Journal Issue: 8; Journal ID: ISSN 2469-9888
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Physics

Citation Formats

Poprocki, S., Buechele, S. W., Crittenden, J. A., Rowan, K., Rubin, D. L., and San Soucie, J. E. Measurement and modeling of electron-cloud-induced betatron tune shifts at the Cornell Electron-Positron Storage Ring test accelerator. United States: N. p., 2019. Web. doi:10.1103/PhysRevAccelBeams.22.081001.
Poprocki, S., Buechele, S. W., Crittenden, J. A., Rowan, K., Rubin, D. L., & San Soucie, J. E. Measurement and modeling of electron-cloud-induced betatron tune shifts at the Cornell Electron-Positron Storage Ring test accelerator. United States. doi:10.1103/PhysRevAccelBeams.22.081001.
Poprocki, S., Buechele, S. W., Crittenden, J. A., Rowan, K., Rubin, D. L., and San Soucie, J. E. Thu . "Measurement and modeling of electron-cloud-induced betatron tune shifts at the Cornell Electron-Positron Storage Ring test accelerator". United States. doi:10.1103/PhysRevAccelBeams.22.081001.
@article{osti_1546833,
title = {Measurement and modeling of electron-cloud-induced betatron tune shifts at the Cornell Electron-Positron Storage Ring test accelerator},
author = {Poprocki, S. and Buechele, S. W. and Crittenden, J. A. and Rowan, K. and Rubin, D. L. and San Soucie, J. E.},
abstractNote = {We report on extensive measurements at the Cornell Electron-Positron Storage Ring of electron-cloud-induced betatron tune shifts for trains of positron bunches at 2.1 and 5.3 GeV with bunch populations ranging between 0.64 × 1010 and 9.6 × 1010. Measurements using a witness bunch with variable distance from the end of the train and variable bunch population provide information on cloud decay and cloud pinching during the bunch passage. We employ Monte Carlo simulations of the reflection and absorption of synchrotron radiation photons to determine the pattern of absorption sites around the circumference of the storage ring. The Geant4 simulation toolkit is used to model the interactions of the photons with the beampipe wall and determine the production energy and location distributions of the photoelectrons which seed the electron cloud. An electron cloud buildup model based on fitted ring-averaged secondary-yield properties of the vacuum chamber predicts tune shifts in good agreement with the measurements.},
doi = {10.1103/PhysRevAccelBeams.22.081001},
journal = {Physical Review Accelerators and Beams},
number = 8,
volume = 22,
place = {United States},
year = {2019},
month = {8}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
DOI: 10.1103/PhysRevAccelBeams.22.081001

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Works referenced in this record:

Progress in Geant4 Electromagnetic Physics Modelling and Validation
journal, December 2015


Probabilistic model for the simulation of secondary electron emission
journal, December 2002


Measurements of x-ray scattering from accelerator vacuum chamber surfaces, and comparison with an analytical model
journal, April 2015

  • Dugan, G. F.; Sonnad, K. G.; Cimino, R.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 18, Issue 4
  • DOI: 10.1103/PhysRevSTAB.18.040704

Electron conditioning of technical aluminium surfaces: Effect on the secondary electron yield
journal, November 2005

  • Le Pimpec, F.; Kirby, R. E.; King, F. K.
  • Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films, Vol. 23, Issue 6
  • DOI: 10.1116/1.2049306

Recent developments in Geant4
journal, November 2016

  • Allison, J.; Amako, K.; Apostolakis, J.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 835
  • DOI: 10.1016/j.nima.2016.06.125

Validation of the Geant4 electromagnetic photon cross-sections for elements and compounds
journal, June 2010

  • Cirrone, G. A. P.; Cuttone, G.; Di Rosa, F.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 618, Issue 1-3
  • DOI: 10.1016/j.nima.2010.02.112

Electron cloud effects on beam evolution in a circular accelerator
journal, August 2003

  • Rumolo, G.; Ghalam, A. Z.; Katsouleas, T.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 6, Issue 8
  • DOI: 10.1103/PhysRevSTAB.6.081002

Accelerator design for the Cornell High Energy Synchrotron Source upgrade
journal, February 2019


Recent Improvements in Geant4 Electromagnetic Physics Models and Interfaces
journal, January 2011

  • Ivanchenko, Vladimir; Apostolakis, John; Bagulya, Alexander
  • Progress in Nuclear Science and Technology, Vol. 2, Issue 0
  • DOI: 10.15669/pnst.2.898

Geant4 Atomic Relaxation
journal, June 2007

  • Guatelli, Susanna; Mantero, Alfonso; Mascialino, Barbara
  • IEEE Transactions on Nuclear Science, Vol. 54, Issue 3
  • DOI: 10.1109/TNS.2007.896214

Geant4—a simulation toolkit
journal, July 2003

  • Agostinelli, S.; Allison, J.; Amako, K.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 506, Issue 3
  • DOI: 10.1016/S0168-9002(03)01368-8

Simulating synchrotron radiation in accelerators including diffuse and specular reflections
journal, February 2017


Bmad: A relativistic charged particle simulation library
journal, March 2006

  • Sagan, D.
  • Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 558, Issue 1
  • DOI: 10.1016/j.nima.2005.11.001

X-Ray Interactions: Photoabsorption, Scattering, Transmission, and Reflection at E = 50-30,000 eV, Z = 1-92
journal, July 1993

  • Henke, B. L.; Gullikson, E. M.; Davis, J. C.
  • Atomic Data and Nuclear Data Tables, Vol. 54, Issue 2, p. 181-342
  • DOI: 10.1006/adnd.1993.1013

Measurement of electron trapping in the Cornell Electron Storage Ring
journal, April 2015

  • Billing, M. G.; Conway, J.; Cowan, E. E.
  • Physical Review Special Topics - Accelerators and Beams, Vol. 18, Issue 4
  • DOI: 10.1103/PhysRevSTAB.18.041001

Validation and verification of Geant4 standard electromagnetic physics
journal, April 2010


The conversion of CESR to operate as the Test Accelerator, CesrTA. Part 1: overview
journal, July 2015