Measuring the RMS length of short electron pulses with an rf cavity and a beam position monitor

PDF Version Also Available for Download.

Description

The Sub-picosecond Accelerator at Los Alamos National Laboratory is a 1,300 MHz, 8 MeV photoinjector. Its beam can be bunched to sub-picosecond lengths using a magnetic chicane. To observe this, the author uses an rf cavity operating in a TM{sub 110} mode to generate a transverse magnetic dipole field that streaks each bunch as it passes. Inserting a screen downstream, he determines the pulse length by measuring the increase in the beam spot width. To achieve sufficient resolution two things must happen: first, the unstreaked beam must be well focused at the screen, and, second, the drift after the cavity ... continued below

Physical Description

8 p.

Creation Information

Russell, S.J. August 1, 1997.

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.

Contact Us

What

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

Description

The Sub-picosecond Accelerator at Los Alamos National Laboratory is a 1,300 MHz, 8 MeV photoinjector. Its beam can be bunched to sub-picosecond lengths using a magnetic chicane. To observe this, the author uses an rf cavity operating in a TM{sub 110} mode to generate a transverse magnetic dipole field that streaks each bunch as it passes. Inserting a screen downstream, he determines the pulse length by measuring the increase in the beam spot width. To achieve sufficient resolution two things must happen: first, the unstreaked beam must be well focused at the screen, and, second, the drift after the cavity must be long enough. At high charge and short pulse lengths, these goals become mutually exclusive. To eliminate this problem, the author proposes using a beam position monitor instead of a screen. The second moment of the beam position monitor signals determines the difference between the x and y rms widths of the beam. With a properly orientated cavity, the resulting change in this quantity also gives the pulse length. However, the BPM does not require a well focused beam at its position, eliminating that constraint on resolution.

Physical Description

8 p.

Notes

INIS; OSTI as DE97008203

Source

  • 17. IEEE particle accelerator conference, Vancouver (Canada), 12-16 May 1997

Language

Item Type

Identifier

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

  • Other: DE97008203
  • Report No.: LA-UR--97-1774
  • Report No.: CONF-970503--250
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 515640
  • Archival Resource Key: ark:/67531/metadc696597

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

  • August 1, 1997

Added to The UNT Digital Library

  • Aug. 14, 2015, 8:43 a.m.

Description Last Updated

  • May 20, 2016, 2:56 p.m.

Usage Statistics

When was this article last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 2

Interact With This Article

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

Citations, Rights, Re-Use

Russell, S.J. Measuring the RMS length of short electron pulses with an rf cavity and a beam position monitor, article, August 1, 1997; New Mexico. (digital.library.unt.edu/ark:/67531/metadc696597/: accessed December 15, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.