A possible explanation for the observed tune shift on the 150GeV front porch at the Tevatron

PDF Version Also Available for Download.

Description

It has been known that the tunes of the Tevatron drift on the 150 GeV front porch . The drift is observed to have the same time dependence as the drift in the chromaticity. The variation in the chromaticity is due to the change in the b{sub 2} of the superconducting dipoles, which represents the integrated sextupole moment of the magnet. It is reasonable to assume that the tune drift is due to the feed down from the changing b{sub 2}. Calculations based on this assumption, both here and in earlier attempts to explain the tune drift, show, absent unreasonable ... continued below

Physical Description

3 pages

Creation Information

Gelfand, Norman M. June 1, 2007.

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

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.

Contact Us

What

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

Description

It has been known that the tunes of the Tevatron drift on the 150 GeV front porch . The drift is observed to have the same time dependence as the drift in the chromaticity. The variation in the chromaticity is due to the change in the b{sub 2} of the superconducting dipoles, which represents the integrated sextupole moment of the magnet. It is reasonable to assume that the tune drift is due to the feed down from the changing b{sub 2}. Calculations based on this assumption, both here and in earlier attempts to explain the tune drift, show, absent unreasonable assumptions about the closed orbit, that the simple models of the variation of the sextupole moment will not explain the tune drift. An explanation, for both the tune drift and the tune split observed when the Tevatron was first operated, is proposed which is based on the longitudinal variation of the sextupole component in the dipoles and the fact that the dipoles are not perfect sector magnets.

Physical Description

3 pages

Source

  • Presented at Particle Accelerator Conference (PAC 07), Albuquerque, New Mexico, 25-29 Jun 2007

Language

Item Type

Identifier

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

  • Report No.: FERMILAB-CONF-07-198-AD
  • Grant Number: AC02-07CH11359
  • Office of Scientific & Technical Information Report Number: 910479
  • Archival Resource Key: ark:/67531/metadc890107

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.

What responsibilities do I have when using this article?

When

Dates and time periods associated with this article.

Creation Date

  • June 1, 2007

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

Description Last Updated

  • Sept. 25, 2017, 8:42 p.m.

Usage Statistics

When was this article last used?

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

Interact With This Article

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Gelfand, Norman M. A possible explanation for the observed tune shift on the 150GeV front porch at the Tevatron, article, June 1, 2007; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc890107/: accessed November 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.