A preliminary assessment of the electron cloud effect for the FNALmain injector upgrade

Thumbnail image of item number 1 in: 'A preliminary assessment of the electron cloud effect for the FNALmain injector upgrade'.
Thumbnail image of item number 2 in: 'A preliminary assessment of the electron cloud effect for the FNALmain injector upgrade'.
Thumbnail image of item number 3 in: 'A preliminary assessment of the electron cloud effect for the FNALmain injector upgrade'.
Thumbnail image of item number 4 in: 'A preliminary assessment of the electron cloud effect for the FNALmain injector upgrade'.
Showing 1-4 of 15 pages in this article.

PDF Version Also Available for Download.

Description

We present results from a preliminary assessment, via computer simulations, of the electron-cloud density for the FNAL Main Injector upgrade at injection energy. Assuming a peak value for secondary emission yield {delta}{sub max} = 1.3, we find a threshold value of the bunch population, N{sub b,th} {approx_equal} 1.25 x 10{sup 11}, beyond which the electron-cloud density {rho}{sub e} reaches a steady-state level that is {approx}10{sup 4} times larger than for N{sub b} < N{sub b,th}, essentially neutralizing the beam, and leading to a tune shift {approx}0.05. Our investigation is limited to a field-free region and to a dipole magnet region, ... continued below

Creation Information

Furman, M.A. June 14, 2006.

Context

This article is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this article can be viewed below.

Who

People and organizations associated with either the creation of this article or its content.

Author

Sponsor

Publisher

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

About | Browse this Partner

Contact Us

Corrections Questions

What

Descriptive information to help identify this article. Follow the links below to find similar items on the Digital Library.

Description

We present results from a preliminary assessment, via computer simulations, of the electron-cloud density for the FNAL Main Injector upgrade at injection energy. Assuming a peak value for secondary emission yield {delta}{sub max} = 1.3, we find a threshold value of the bunch population, N{sub b,th} {approx_equal} 1.25 x 10{sup 11}, beyond which the electron-cloud density {rho}{sub e} reaches a steady-state level that is {approx}10{sup 4} times larger than for N{sub b} < N{sub b,th}, essentially neutralizing the beam, and leading to a tune shift {approx}0.05. Our investigation is limited to a field-free region and to a dipole magnet region, both of which yield similar results for both N{sub b,th} and the steady-state value of {rho}{sub e}. Possible dynamical effects from the electron cloud on the beam, such as emittance growth and instabilities, remain to be investigated separately.

Source

  • Journal Name: New Journal of Physics; Journal Volume: 8; Related Information: Journal Publication Date: 2006

Language

Item Type

Identifier

Unique identifying numbers for this article in the Digital Library or other systems.

  • Report No.: LBNL--57634-JArt
  • Grant Number: DE-AC02-05CH11231
  • DOI: 10.1088/1367-2630/8/11/279 | External Link
  • Office of Scientific & Technical Information Report Number: 900701
  • Archival Resource Key: ark:/67531/metadc877079

Collections

This article is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

About | Browse this Collection

What responsibilities do I have when using this article?

Digital Files

When

Dates and time periods associated with this article.

Creation Date

  • June 14, 2006

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

Description Last Updated

  • Sept. 21, 2017, 7:11 p.m.

Usage Statistics

When was this article last used?

Congratulations! It looks like you are the first person to view this item online.
More Statistics

Interact With This Article

Here are some suggestions for what to do next.

Start Reading

Thumbnail image of item number 1 in: 'A preliminary assessment of the electron cloud effect for the FNALmain injector upgrade'.
Thumbnail image of item number 2 in: 'A preliminary assessment of the electron cloud effect for the FNALmain injector upgrade'.
Thumbnail image of item number 3 in: 'A preliminary assessment of the electron cloud effect for the FNALmain injector upgrade'.
Thumbnail image of item number 4 in: 'A preliminary assessment of the electron cloud effect for the FNALmain injector upgrade'.

PDF Version Also Available for Download.

Citations, Rights, Re-Use

Furman, M.A. A preliminary assessment of the electron cloud effect for the FNALmain injector upgrade, article, June 14, 2006; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc877079/: accessed April 23, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.