IPAC2017 - List of Authors (Soby, L.)

Paper	Title	Page
MOPAB112	Schottky Based Intensity Measurements and Errors Due to Statistical Fluctuations	385
	C. Carli, M.E. Angoletta, F. Caspers, O.R. Jones, F. Pedersen, J. Sanchez-Quesada, L. Søby CERN, Geneva, Switzerland
	The beam intensities at the Extra Low ENergy Antiproton ring ELENA are too low for standard beam current transformers and, thus, are measured with longitudinal Schottky diagnostics. This method is already successfully used at the Antiproton Decelerator since the commissioning of this machine. The fact that Schottky noise is a statistical phenomenon implies statistical errors of these measurements. Simple analytical formulas describing the statistical error to be expected as a function of the frequency spread of the band considered, the time resolution chosen and the background noise have been derived. On the one hand, low revolution harmonics and, in turn, frequency spread of the band analysed lead to large measurement errors as this situation corresponds to low momentum resolution of the resulting distribution describing the beam. At very large revolution harmonics and, thus, frequency spreads of the band analysed, the measurement error increases again due to additional contributions from the background noise.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB112
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MOPAB119	Beam Instrumentation Developments for the Advanced Proton Driven Plasma Wakefield Acceleration Experiment at CERN	404
	S. Mazzoni, M. Barros Marin, B. Biskup, A. Boccardi, T.B. Bogey, S. Burger, F.S. Domingues Sousa, E. Effinger, J. Emery, A. Goldblatt, I. Gorgisyan, E. Gschwendtner, A. Guerrero, L.K. Jensen, T. Lefèvre, D. Medina, B. Moser, G. Schneider, L. Søby, M. Turner, M. Vicente Romero, M. Wendt CERN, Geneva, Switzerland B. Biskup Czech Technical University, Prague 6, Czech Republic M. Turner TUG/ITP, Graz, Austria V.A. Verzilov TRIUMF, Vancouver, Canada
	The Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) at CERN aims to develop a proof-of-principle electron accelerator based on proton driven plasma wake-field acceleration. The core of AWAKE is a 10 metre long plasma cell filled with Rubidium vapour in which single, 400 GeV, proton bunches extracted from the CERN Super Proton Synchrotron (SPS) generate a strong plasma wakefield. The plasma is seeded using a femtosecond pulsed Ti:Sapphire laser. The aim of the experiment is to inject low energy electrons onto the plasma wake and accelerate them over this short distance to an energy of several GeV. To achieve its commissioning goals, AWAKE requires the precise measurement of the position and transverse profile of the laser, proton and electron beams as well as their temporal synchronisation. This contribution will present the beam instrumentation systems designed for AWAKE and their performance during the 2016 proton beam commissioning period.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB119
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MOPAB120	Beam Instrumentation for the CERN LINAC4 and PSB Half Sector Test	408
	F. Roncarolo, J.C. Allica Santamaria, M. Bozzolan, C. Bracco, S. Burger, G.J. Focker, G. Guidoboni, L.K. Jensen, B. Mikulec, A. Navarro Fernandez, U. Raich, J.B. Ruiz, L. Søby, J. Tan, W. Viganò, C. Vuitton, C. Zamantzas CERN, Geneva, Switzerland T. Hofmann Royal Holloway, University of London, Surrey, United Kingdom
	The construction, installation and initial commissioning of CERN's LINAC4 was completed in 2016 with H⁻ ions successfully accelerated to its top energy of 160 MeV. The accelerator is equipped with a large number of beam diagnostic systems that are essential to monitor, control and optimize the beam parameters. A general overview of the installed systems and their functional specifications will be followed by a summary of the most relevant results. This includes transverse profile monitors (wire scanners, wire grids and a laser profile monitor), beam position and phase monitors (whose ToF measurements were essential for adjusting RF cavity parameters), beam loss monitors, beam current transformers and longitudinal beam shape monitors. This contribution will also cover the beam instrumentation for the so-called PSB Half Sector Test, which has been temporarily installed in the LINAC4 transfer line to study H⁻ stripping efficiency. At this facility it was possible to test the new H⁰/H⁻ beam current monitor, designed to monitor the stripping efficiency and an essential element of the beam interlock system when the LINAC4 is connected to the PSB in 2019.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB120
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Paper

Title

Page

Schottky Based Intensity Measurements and Errors Due to Statistical Fluctuations

385

C. Carli, M.E. Angoletta, F. Caspers, O.R. Jones, F. Pedersen, J. Sanchez-Quesada, L. Søby
CERN, Geneva, Switzerland

The beam intensities at the Extra Low ENergy Antiproton ring ELENA are too low for standard beam current transformers and, thus, are measured with longitudinal Schottky diagnostics. This method is already successfully used at the Antiproton Decelerator since the commissioning of this machine. The fact that Schottky noise is a statistical phenomenon implies statistical errors of these measurements. Simple analytical formulas describing the statistical error to be expected as a function of the frequency spread of the band considered, the time resolution chosen and the background noise have been derived. On the one hand, low revolution harmonics and, in turn, frequency spread of the band analysed lead to large measurement errors as this situation corresponds to low momentum resolution of the resulting distribution describing the beam. At very large revolution harmonics and, thus, frequency spreads of the band analysed, the measurement error increases again due to additional contributions from the background noise.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB112

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPAB119

Beam Instrumentation Developments for the Advanced Proton Driven Plasma Wakefield Acceleration Experiment at CERN

404

S. Mazzoni, M. Barros Marin, B. Biskup, A. Boccardi, T.B. Bogey, S. Burger, F.S. Domingues Sousa, E. Effinger, J. Emery, A. Goldblatt, I. Gorgisyan, E. Gschwendtner, A. Guerrero, L.K. Jensen, T. Lefèvre, D. Medina, B. Moser, G. Schneider, L. Søby, M. Turner, M. Vicente Romero, M. Wendt
CERN, Geneva, Switzerland
B. Biskup
Czech Technical University, Prague 6, Czech Republic
M. Turner
TUG/ITP, Graz, Austria
V.A. Verzilov
TRIUMF, Vancouver, Canada

The Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) at CERN aims to develop a proof-of-principle electron accelerator based on proton driven plasma wake-field acceleration. The core of AWAKE is a 10 metre long plasma cell filled with Rubidium vapour in which single, 400 GeV, proton bunches extracted from the CERN Super Proton Synchrotron (SPS) generate a strong plasma wakefield. The plasma is seeded using a femtosecond pulsed Ti:Sapphire laser. The aim of the experiment is to inject low energy electrons onto the plasma wake and accelerate them over this short distance to an energy of several GeV. To achieve its commissioning goals, AWAKE requires the precise measurement of the position and transverse profile of the laser, proton and electron beams as well as their temporal synchronisation. This contribution will present the beam instrumentation systems designed for AWAKE and their performance during the 2016 proton beam commissioning period.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB119

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOPAB120

Beam Instrumentation for the CERN LINAC4 and PSB Half Sector Test

408

F. Roncarolo, J.C. Allica Santamaria, M. Bozzolan, C. Bracco, S. Burger, G.J. Focker, G. Guidoboni, L.K. Jensen, B. Mikulec, A. Navarro Fernandez, U. Raich, J.B. Ruiz, L. Søby, J. Tan, W. Viganò, C. Vuitton, C. Zamantzas
CERN, Geneva, Switzerland
T. Hofmann
Royal Holloway, University of London, Surrey, United Kingdom

The construction, installation and initial commissioning of CERN's LINAC4 was completed in 2016 with H⁻ ions successfully accelerated to its top energy of 160 MeV. The accelerator is equipped with a large number of beam diagnostic systems that are essential to monitor, control and optimize the beam parameters. A general overview of the installed systems and their functional specifications will be followed by a summary of the most relevant results. This includes transverse profile monitors (wire scanners, wire grids and a laser profile monitor), beam position and phase monitors (whose ToF measurements were essential for adjusting RF cavity parameters), beam loss monitors, beam current transformers and longitudinal beam shape monitors. This contribution will also cover the beam instrumentation for the so-called PSB Half Sector Test, which has been temporarily installed in the LINAC4 transfer line to study H⁻ stripping efficiency. At this facility it was possible to test the new H⁰/H⁻ beam current monitor, designed to monitor the stripping efficiency and an essential element of the beam interlock system when the LINAC4 is connected to the PSB in 2019.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB120

Export •

reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)