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A. Cook

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3 papers

title: Dielectric Wakefield Accelerator Experiments at the Saber Facility

format: conference procceeding

conference: PAC07

year: 2007

17 authors: G. Travish | H. Badakov | A. Cook | J. Rosenzweig | R. Tikhoplav | A. Kanareykin | M.C. Thompson | M.K. Berry | I. Blumenfeld | F.J. Decker | M.J. Hogan | R. Ischebeck | R. Iverson | N. Kirby | R. Siemann | D. Walz | P. Muggli

abstract: Electron bunches with the unparalleled combination of high charge, low emittances, and short time duration, as first produced at the SLAC Final Focus Test Beam (FFTB), are foreseen to be produced at the SABER facility. These types of bunches have enabled wakefield driven accelerating schemes of multi-GV/m in plasmas. In the context of the Dielectric Wakefield Accelerators (DWA) such beams, having rms bunch length as short as 20 um, have been used to drive 100 um and 200 um ID hollow tubes above 20 GV/m surface fields. These FFTB tests enabled the measurement of a breakdown threshold in fused silica (with full data analysis still ongoing) [1]. With the construction and commissioning of the SABER facility at SLAC, new experiments would be made possible to test further aspects of DWAs including materials, tube geometrical variations, direct measurements of the Cerenkov fields, and proof of acceleration in tubes >10 cm in length. This collaboration will investigate breakdown thresholds and accelerating fields in new materials including CVD diamond. Here we describe the experimental plans, beam parameters, simulations, and progress to date as well as future prospects for machines based of DWA structures.

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title: Chicane Radiation Measurements with a Compressed Electron Beam at the BNL ATF

format: conference procceeding

conference: 2007 Particle Accelerator Conference

year: 2007

12 authors: G. Andonian | R. Agustsson | A. Cook | M. Dunning | E. Hemsing | A. Murokh | S. Reiche | J. Rosenzweig | M. Babzien | K. Kusche | R. Malone | V. Yakimenko

abstract: The radiation emitted from a chicane compressor has been studied at the Brookhaven National Laboratory (BNL) Accelerator Test Facility (ATF). Coherent edge radiation (CER) is emitted from a compressed electron beam as it traverses sharp edge regions of a magnet. The compression is accompanied by strong self-fields, which are manifested as distortions in the momentum space called beam bifurcation. Recent measurements indicate that the bunch length is approximately 100 fs rms. The emitted THz chicane radiation displays strong signatures of CER. This paper reports on the experimental characterization and subsequent analysis of the chicane radiation measurements at the BNL ATF with a discussion of diagnostics development and implementation. The characterization includes spectral analysis, far-field intensity distribution, and polarization effects. Experimental data is benchmarked to a custom developed start-to-end simulation suite.

keywords: CER radiation compressor chicane

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title: DIELECTRIC WAKEFIELD ACCELERATOR EXPERIMENTS AT THE

format: journal article

year:

17 authors: G. Travish | H. Badakov | A. Cook | J. Rosenzweig | R. Tikhoplav | A. Kanareykin | M. C. Thompson | M. K. Berry | I. Blumenfeld | F.-J. Decker | M. J. Hogan | R. Ischebeck | R. Iverson | N. Kirby | R. Siemann | D. Walz | P. Muggli

abstract: Electron bunches with the unparalleled combination of high charge, low emittances, and short time duration, as first produced at the SLAC Final Focus Test Beam (FFTB), are foreseen to be produced at the SABER facility. These types of bunches have enabled wakefield driven accelerating schemes of multi-GV/m in plasmas. In the context of the Dielectric Wakefield Accelerators (DWA) such beams, having rms bunch length as short as 20 um, have been used to drive 100 um and 200 um ID hollow tubes above 20 GV/m surface fields. These FFTB tests enabled the measurement of a breakdown threshold in fused silica (with full data analysis still ongoing) [1]. With the construction and commissioning of the SABER facility at SLAC, new experiments would be made possible to test further aspects of DWAs including materials, tube geometrical variations, direct measurements of the Cerenkov fields, and proof of acceleration in tubes >10 cm in length. This collaboration will investigate breakdown thresholds and accelerating fields in new materials including CVD diamond. Here we describe the experimental plans, beam parameters, simulations, and progress to date as well as future prospects for machines based of DWA structures.

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title:	Dielectric Wakefield Accelerator Experiments at the Saber Facility
format:	conference procceeding
conference:	PAC07
year:	2007
17 authors:	G. Travish \| H. Badakov \| A. Cook \| J. Rosenzweig \| R. Tikhoplav \| A. Kanareykin \| M.C. Thompson \| M.K. Berry \| I. Blumenfeld \| F.J. Decker \| M.J. Hogan \| R. Ischebeck \| R. Iverson \| N. Kirby \| R. Siemann \| D. Walz \| P. Muggli
abstract:	Electron bunches with the unparalleled combination of high charge, low emittances, and short time duration, as first produced at the SLAC Final Focus Test Beam (FFTB), are foreseen to be produced at the SABER facility. These types of bunches have enabled wakefield driven accelerating schemes of multi-GV/m in plasmas. In the context of the Dielectric Wakefield Accelerators (DWA) such beams, having rms bunch length as short as 20 um, have been used to drive 100 um and 200 um ID hollow tubes above 20 GV/m surface fields. These FFTB tests enabled the measurement of a breakdown threshold in fused silica (with full data analysis still ongoing) [1]. With the construction and commissioning of the SABER facility at SLAC, new experiments would be made possible to test further aspects of DWAs including materials, tube geometrical variations, direct measurements of the Cerenkov fields, and proof of acceleration in tubes >10 cm in length. This collaboration will investigate breakdown thresholds and accelerating fields in new materials including CVD diamond. Here we describe the experimental plans, beam parameters, simulations, and progress to date as well as future prospects for machines based of DWA structures.
keywords:	pbpl
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title:	Chicane Radiation Measurements with a Compressed Electron Beam at the BNL ATF
format:	conference procceeding
conference:	2007 Particle Accelerator Conference
year:	2007
12 authors:	G. Andonian \| R. Agustsson \| A. Cook \| M. Dunning \| E. Hemsing \| A. Murokh \| S. Reiche \| J. Rosenzweig \| M. Babzien \| K. Kusche \| R. Malone \| V. Yakimenko
abstract:	The radiation emitted from a chicane compressor has been studied at the Brookhaven National Laboratory (BNL) Accelerator Test Facility (ATF). Coherent edge radiation (CER) is emitted from a compressed electron beam as it traverses sharp edge regions of a magnet. The compression is accompanied by strong self-fields, which are manifested as distortions in the momentum space called beam bifurcation. Recent measurements indicate that the bunch length is approximately 100 fs rms. The emitted THz chicane radiation displays strong signatures of CER. This paper reports on the experimental characterization and subsequent analysis of the chicane radiation measurements at the BNL ATF with a discussion of diagnostics development and implementation. The characterization includes spectral analysis, far-field intensity distribution, and polarization effects. Experimental data is benchmarked to a custom developed start-to-end simulation suite.
keywords:	CER radiation compressor chicane
Download \| View \| Details \| edit \| delete

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