Measuring short electron bunch lengths using coherent Smith-Purcell radiation

Nguyen, D C

Title: Measuring short electron bunch lengths using coherent Smith-Purcell radiation

Abstract

A method is provided for directly determining the length of sub-picosecond electron bunches. A metallic grating is formed with a groove spacing greater than a length expected for the electron bunches. The electron bunches are passed over the metallic grating to generate coherent and incoherent Smith-Purcell radiation. The angular distribution of the coherent Smith-Purcell radiation is then mapped to directly deduce the length of the electron bunches. 8 figs.

Inventors:: Nguyen, D C

Issue Date:: 1999-03-30

Research Org.:: Univ. of California (United States)

Sponsoring Org.:: USDOE, Washington, DC (United States)

OSTI Identifier:: 335480

Patent Number(s):: 5889797

Application Number:: PAN: 8-915,240; TRN: 99:004571

Assignee:: Univ. of California, Los Alamos, NM (United States)

DOE Contract Number:: W-7405-ENG-36

Resource Type:: Patent

Resource Relation:: Other Information: PBD: 30 Mar 1999

Country of Publication:: United States

Language:: English

Subject:: 43 PARTICLE ACCELERATORS; MEASURING METHODS; ELECTRON BEAMS; BEAM MONITORING; GRATINGS; COHERENT RADIATION

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                    Nguyen, D C. Measuring short electron bunch lengths using coherent Smith-Purcell radiation.  United States: N. p., 1999. 
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                    Nguyen, D C. Measuring short electron bunch lengths using coherent Smith-Purcell radiation.  United States.

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                    Nguyen, D C. Tue .  
        "Measuring short electron bunch lengths using coherent Smith-Purcell radiation".  United States.

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@article{osti_335480,

  title        = {Measuring short electron bunch lengths using coherent Smith-Purcell radiation},

  author       = {Nguyen, D C},

  abstractNote = {A method is provided for directly determining the length of sub-picosecond electron bunches. A metallic grating is formed with a groove spacing greater than a length expected for the electron bunches. The electron bunches are passed over the metallic grating to generate coherent and incoherent Smith-Purcell radiation. The angular distribution of the coherent Smith-Purcell radiation is then mapped to directly deduce the length of the electron bunches. 8 figs.},

  doi          = {},

  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {1999},

  month        = {3}

}

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Works referenced in this record:

Observation of coherent Smith-Purcell radiation from short-bunched electrons
journal, June 1995

Ishi, K.; Shibata, Y.; Takahashi, T.
Physical Review E, Vol. 51, Issue 6
https://doi.org/10.1103/PhysRevE.51.R5212

First observation of Smith-Purcell radiation from relativistic electrons
journal, September 1992

Doucas, G.; Mulvey, J. H.; Omori, M.
Physical Review Letters, Vol. 69, Issue 12
https://doi.org/10.1103/PhysRevLett.69.1761

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Measuring short electron bunch lengths using coherent smith-purcell radiation

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A method is provided for directly determining the length of sub-picosecond electron bunches. A metallic grating is formed with a groove spacing greater than a length expected for the electron bunches. The electron bunches are passed over the metallic grating to generate coherent and incoherent Smith-Purcell radiation. The angular distribution of the coherent Smith-Purcell radiation is then mapped to directly deduce the length of the electron bunches.
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Advanced accelerators for fourth generation light sources based on high brightness linacs or laser-driven wakefield accelerators will operate with intense, highly relativistic electron bunches that are only a few fs long. Diagnostic techniques for the determination of temporal profile of such bunches are required to be non invasive, single shot, economic and with the required resolution in the fs regime. The use of a radiative process such as coherent Smith-Purcell radiation (SPR), is particularly promising with this respect. In this technique the beam is made to radiate a small amount of electromagnetic radiation and the temporal profile is reconstructed frommore » « less
DOI: https://doi.org/10.1088/1748-0221/7/01/P01009

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Title: Measuring short electron bunch lengths using coherent Smith-Purcell radiation

Abstract

Citation Formats

Observation of coherent Smith-Purcell radiation from short-bunched electrons journal, June 1995

First observation of Smith-Purcell radiation from relativistic electrons journal, September 1992

Observation of coherent Smith-Purcell radiation from short-bunched electrons
journal, June 1995

First observation of Smith-Purcell radiation from relativistic electrons
journal, September 1992