Experimental measurements of rf breakdowns and deflecting gradients in mm-wave metallic accelerating structures

Dal Forno, Massimo; Dolgashev, Valery; Bowden, Gordon; Clarke, Christine; Hogan, Mark; McCormick, Doug; Novokhatski, Alexander; Spataro, Bruno; Weathersby, Stephen; Tantawi, Sami G.

doi:10.1103/PhysRevAccelBeams.19.051302

Title: Experimental measurements of rf breakdowns and deflecting gradients in mm-wave metallic accelerating structures

Journal Article · Tue May 03 00:00:00 EDT 2016 · Physical Review Accelerators and Beams

DOI:https://doi.org/10.1103/PhysRevAccelBeams.19.051302· OSTI ID:1250615

Dal Forno, Massimo; Dolgashev, Valery; Bowden, Gordon; Clarke, Christine; Hogan, Mark; McCormick, Doug; Novokhatski, Alexander; Spataro, Bruno; Weathersby, Stephen; Tantawi, Sami G.

We present an experimental study of a high-gradient metallic accelerating structure at sub-THz frequencies, where we investigated the physics of rf breakdowns. Wakefields in the structure were excited by an ultrarelativistic electron beam. We present the first quantitative measurements of gradients and metal vacuum rf breakdowns in sub-THz accelerating cavities. When the beam travels off axis, a deflecting field is induced in addition to the longitudinal field. We measured the deflecting forces by observing the displacement and changes in the shape of the electron bunch. This behavior can be exploited for subfemtosecond beam diagnostics.

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Research Organization:: SLAC National Accelerator Lab., Menlo Park, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-76SF00515

OSTI ID:: 1250615

Alternate ID(s):: OSTI ID: 1255513

Report Number(s):: SLAC-PUB-16539; PRABFM; 051302

Journal Information:: Physical Review Accelerators and Beams, Vol. 19, Issue 5; ISSN 2469-9888

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 20 works

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References (13)

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rf breakdown tests of mm-wave metallic accelerating structures Dal Forno, Massimo; Dolgashev, Valery; Bowden, Gordon Physical Review Accelerators and Beams, Vol. 19, Issue 1 https://doi.org/10.1103/PhysRevAccelBeams.19.011301	journal	January 2016
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Femtosecond phase control in high-field terahertz-driven ultrafast electron sources Zhang, Dongfang; Fallahi, Arya; Hemmer, Michael Deutsches Elektronen-Synchrotron, DESY, Hamburg https://doi.org/10.3204/pubdb-2019-02569	text	January 2019
Design of Planar Millimeter-Wave Metallic Structures for Wakefield Acceleration Zhang, Liang; He, Wenlong; Jamison, Steven Journal of Infrared, Millimeter, and Terahertz Waves, Vol. 40, Issue 1 https://doi.org/10.1007/s10762-018-0545-8	journal	October 2018
Design of the Compact Linear Collider main linac accelerating structure made from two halves Zha, Hao; Grudiev, Alexej Physical Review Accelerators and Beams, Vol. 20, Issue 4 https://doi.org/10.1103/physrevaccelbeams.20.042001	journal	April 2017
Measurements of electron beam deflection and rf breakdown rate from a surface wave guided in metallic mm-wave accelerating structures Dal Forno, Massimo; Dolgashev, Valery; Bowden, Gordon Physical Review Accelerators and Beams, Vol. 21, Issue 9 https://doi.org/10.1103/physrevaccelbeams.21.091301	journal	September 2018
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