IPAC2014 - List of Authors (Bruni, C.)

Paper	Title	Page
WEPRO001	Effect of Beam Dynamics Processes in the Low Energy Ring ThomX	1933
	N. Delerue, C. Bruni, I. Chaikovska, I.V. Drebot, M. Jacquet, A. Variola, Z.F. Zomer LAL, Orsay, France A. Loulergue SOLEIL, Gif-sur-Yvette, France
	Funding: This work is supported by the French "Agence Nationale de la Recherche" as part of the program "investing in the future" under reference ANR-10-EQPX-51 and by grants from Région Ile-de-France. As part of the R&D for the 50 MeV ThomX Compton source project, we have studied the effect of several beam dynamics processes on the evolution of the beam in the ring. The processes studied include among others Compton scattering, intrabeam scattering, coherent synchrotron radiation. We have performed extensive simulations of a full injection/extraction cycle (400000 turns). We show how each of these processes degrades the flux of photons produced and how a feedback system contributes to recovering most of the flux.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRO001
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WEPRO052	The ThomX Project Status	2062
	A. Variola, D. Auguste, A. Blin, J. Bonis, S. Bouaziz, C. Bruni, K. Cassou, I. Chaikovska, S. Chancé, V. Chaumat, R. Chiche, P. Cornebise, O. Dalifard, N. Delerue, T. Demma, I.V. Drebot, K. Dupraz, N. El Kamchi, M. El Khaldi, P. Gauron, A. Gonnin, E. Guerard, J. Haissinski, M. Jacquet, D. Jehanno, M. Jouvin, E. Jules, F. Labaye, M. Lacroix, M. Langlet, D. Le Guidec, P. Lepercq, R. Marie, J.C. Marrucho, A. Martens, B. Mercier, E. Mistretta, H. Monard, Y. Peinaud, A. Pérus, B. Pieyre, E. Plaige, C. Prevost, T. Roulet, R. Roux, V. Soskov, A. Stocchi, C. Vallerand, A. Vermes, F. Wicek, Y. Yan, J.F. Zhang, Z.F. Zomer LAL, Orsay, France P. Alexandre, C. Benabderrahmane, F. Bouvet, L. Cassinari, M.-E. Couprie, P. Deblay, Y. Dietrich, M. Diop, M.E. El Ajjouri, M.P. Gacoin, C. Herbeaux, N. Hubert, M. Labat, P. Lebasque, A. Lestrade, R. Lopes, A. Loulergue, P. Marchand, F. Marteau, D. Muller, A. Nadji, R. Nagaoka, J.-P. Pollina, F. Ribeiro, M. Ros, R. Sreedharan SOLEIL, Gif-sur-Yvette, France A. Bravin, G. Le Duc, J. Susini ESRF, Grenoble, France C. Bruyère, A. Cobessi, W. Del Net, J.L. Hazemann, J.L. Hodeau, P. Jeantet, J. Lacipière, O. Proux Institut NEEL, Grenoble, France E. Cormier, J. Lhermite CELIA, Talence, France L. De Viguerie, H. Rousselière, P. Walter LAMS, Universite Pierre et Marie Curie, Ivry Sur Seine, France H. Elleaume, F. Esteve INSERM, Grenoble Institut des Neurosciences, La Tronche, France J.M. Horodinsky, N. Pauwels, P. Robert CNRS (IRSD), Orsay, France S. Sierra TED, Velizy, France
	Funding: Work supported by the French Agence Nationale de la Recherche as part of the program EQUIPEX under reference ANR-10-EQPX-51, the Ile de France region, CNRS-IN2P3 and Université Paris Sud XI A collaboration of seven research institutes and an industry has been set up for the ThomX project, a compact Compton Backscattering Source (CBS) based in Orsay – France. After a period of study and definition of the machine performances a complete description of all the systems has been provided. The infrastructures work is started and the main systems are in the call for tender phase. In this paper we will illustrate the definitive machine parameters and components characteristics. We will also update the results of the different ongoing R&D on optical resonators, fast power supplies for the injection kickers and on the electron gun.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRO052
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THPRO100	Progresses of the ThomX High Level Control Applications based on MATLAB Middle Layer	3125
	J.F. Zhang, C. Bruni, I. Chaikovska, S. Chancé, T. Demma, A. Variola LAL, Orsay, France A. Loulergue, L.S. Nadolski SOLEIL, Gif-sur-Yvette, France
	Funding: Work is supported by the French "Agence Nationale de la Recherche" as part of the program "investing in the future" under reference ANR-10-EQPX-51, and also by grants from Region Ile-de-France. The Compton back-scattering based compact X-ray source ThomX is under construction in LAL/IN2P3, CNRS, France. This machine will serve as a demonstrator in producing up to 10¹³ ph/s for imaging and cultural heritage recovery. The high level applications of the ThomX machine for the future commissioning and operations are being developed using Matlab Middle Layer (MML) which is broadly used in the modern synchrotron light sources. In this article, we report the nearest progresses of high level applications of the ThomX machine, and present the nonlinear response matrices to correct the tune, chromaticity and orbit, and the algorithm to correct the orbit in the transfer line.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRO100
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THPME094	Measurement of Low-charged Electron Beam with a scintillator Screen	3456
	T. Vinatier, P. Bambade, C. Bruni, S. Liu LAL, Orsay, France
	Measuring electron beam charge lower than 1pC is very challenging since the traditional diagnostics, like Faraday Cup and ICT, are limited in resolution to a few pC. A way to simply measure lower charge would be to use the linear relation, existing before saturation regime, between the incident charge and the total light intensity emitted by a YAG screen. Measurement has been performed on PHIL accelerator at LAL, with charge lower than 50pC, with a YAG screen located just in front of a Faraday Cup. It shows a very good linear response of the YAG screen up to the Faraday Cup resolution limit (2pC) and therefore allows calibrating the YAG screen for lower charge measurement with an estimated precision of 4%. A noise analysis allows estimating the YAG screen resolution limit around 40fC. Results of low charge measurement on PHIL will be shown and compared to those coming from a diamond detector installed on PHIL, in order to validate the measurement principle and to determine its precision and resolution limit. Such simple measurement may thereafter be used as single-shot charge diagnostic for electron beam generated and accelerated by laser-plasma interaction.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME094
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THPME095	Length Measurement of High-brightness Electron Beam thanks to the 3-Phase Method	3459
SUSPSNE080	use link to see paper's listing under its alternate paper code
	T. Vinatier, C. Bruni, S. Chancé, P.M. Puzo LAL, Orsay, France
	The goal of 3-phase method is to determine the length of an electron beam without dedicated diagnostics by varying the measurement conditions of its energy spread, through a change in the RF phase of an accelerating structure. The originality here comes from the fact that it is applied on high-brightness electron beams of few MeV generated by RF photo-injectors. It allows testing the accuracy of 3-phase method, since the length to reconstruct is known as being that of the laser pulse generating the beam. It requires establishing the longitudinal transfer matrix of a RF photo-injector, which is difficult since the electron velocity vary from 0 to relativistic during its path. The 3-phase method in RF photo-injector has been simulated by ASTRA and PARMELA codes, validating the principle of the method. First measurement has been done on PHIL accelerator at LAL, showing a good agreement with the expected length. I will then show results obtained at PITZ with a standing wave booster and a comparison with those coming from a Cerenkov detector. Finally, measurements at higher energy performed on the SOLEIL LINAC with travelling wave accelerating structures will be exposed. : K-J. Kim, “RF and Space Charge Effects in Laser-Driven RF Electron Guns”, Nucl. Instr. Meth., A275, 201 (1989)
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME095
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Paper

Title

Page

Effect of Beam Dynamics Processes in the Low Energy Ring ThomX

1933

N. Delerue, C. Bruni, I. Chaikovska, I.V. Drebot, M. Jacquet, A. Variola, Z.F. Zomer
LAL, Orsay, France
A. Loulergue
SOLEIL, Gif-sur-Yvette, France

Funding: This work is supported by the French "Agence Nationale de la Recherche" as part of the program "investing in the future" under reference ANR-10-EQPX-51 and by grants from Région Ile-de-France.
As part of the R&D for the 50 MeV ThomX Compton source project, we have studied the effect of several beam dynamics processes on the evolution of the beam in the ring. The processes studied include among others Compton scattering, intrabeam scattering, coherent synchrotron radiation. We have performed extensive simulations of a full injection/extraction cycle (400000 turns). We show how each of these processes degrades the flux of photons produced and how a feedback system contributes to recovering most of the flux.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRO001

Export •

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

WEPRO052

The ThomX Project Status

2062

A. Variola, D. Auguste, A. Blin, J. Bonis, S. Bouaziz, C. Bruni, K. Cassou, I. Chaikovska, S. Chancé, V. Chaumat, R. Chiche, P. Cornebise, O. Dalifard, N. Delerue, T. Demma, I.V. Drebot, K. Dupraz, N. El Kamchi, M. El Khaldi, P. Gauron, A. Gonnin, E. Guerard, J. Haissinski, M. Jacquet, D. Jehanno, M. Jouvin, E. Jules, F. Labaye, M. Lacroix, M. Langlet, D. Le Guidec, P. Lepercq, R. Marie, J.C. Marrucho, A. Martens, B. Mercier, E. Mistretta, H. Monard, Y. Peinaud, A. Pérus, B. Pieyre, E. Plaige, C. Prevost, T. Roulet, R. Roux, V. Soskov, A. Stocchi, C. Vallerand, A. Vermes, F. Wicek, Y. Yan, J.F. Zhang, Z.F. Zomer
LAL, Orsay, France
P. Alexandre, C. Benabderrahmane, F. Bouvet, L. Cassinari, M.-E. Couprie, P. Deblay, Y. Dietrich, M. Diop, M.E. El Ajjouri, M.P. Gacoin, C. Herbeaux, N. Hubert, M. Labat, P. Lebasque, A. Lestrade, R. Lopes, A. Loulergue, P. Marchand, F. Marteau, D. Muller, A. Nadji, R. Nagaoka, J.-P. Pollina, F. Ribeiro, M. Ros, R. Sreedharan
SOLEIL, Gif-sur-Yvette, France
A. Bravin, G. Le Duc, J. Susini
ESRF, Grenoble, France
C. Bruyère, A. Cobessi, W. Del Net, J.L. Hazemann, J.L. Hodeau, P. Jeantet, J. Lacipière, O. Proux
Institut NEEL, Grenoble, France
E. Cormier, J. Lhermite
CELIA, Talence, France
L. De Viguerie, H. Rousselière, P. Walter
LAMS, Universite Pierre et Marie Curie, Ivry Sur Seine, France
H. Elleaume, F. Esteve
INSERM, Grenoble Institut des Neurosciences, La Tronche, France
J.M. Horodinsky, N. Pauwels, P. Robert
CNRS (IRSD), Orsay, France
S. Sierra
TED, Velizy, France

Funding: Work supported by the French Agence Nationale de la Recherche as part of the program EQUIPEX under reference ANR-10-EQPX-51, the Ile de France region, CNRS-IN2P3 and Université Paris Sud XI
A collaboration of seven research institutes and an industry has been set up for the ThomX project, a compact Compton Backscattering Source (CBS) based in Orsay – France. After a period of study and definition of the machine performances a complete description of all the systems has been provided. The infrastructures work is started and the main systems are in the call for tender phase. In this paper we will illustrate the definitive machine parameters and components characteristics. We will also update the results of the different ongoing R&D on optical resonators, fast power supplies for the injection kickers and on the electron gun.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRO052

Export •

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

THPRO100

Progresses of the ThomX High Level Control Applications based on MATLAB Middle Layer

3125

J.F. Zhang, C. Bruni, I. Chaikovska, S. Chancé, T. Demma, A. Variola
LAL, Orsay, France
A. Loulergue, L.S. Nadolski
SOLEIL, Gif-sur-Yvette, France

Funding: Work is supported by the French "Agence Nationale de la Recherche" as part of the program "investing in the future" under reference ANR-10-EQPX-51, and also by grants from Region Ile-de-France.
The Compton back-scattering based compact X-ray source ThomX is under construction in LAL/IN2P3, CNRS, France. This machine will serve as a demonstrator in producing up to 10¹³ ph/s for imaging and cultural heritage recovery. The high level applications of the ThomX machine for the future commissioning and operations are being developed using Matlab Middle Layer (MML) which is broadly used in the modern synchrotron light sources. In this article, we report the nearest progresses of high level applications of the ThomX machine, and present the nonlinear response matrices to correct the tune, chromaticity and orbit, and the algorithm to correct the orbit in the transfer line.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRO100

Export •

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

THPME094

Measurement of Low-charged Electron Beam with a scintillator Screen

3456

T. Vinatier, P. Bambade, C. Bruni, S. Liu
LAL, Orsay, France

Measuring electron beam charge lower than 1pC is very challenging since the traditional diagnostics, like Faraday Cup and ICT, are limited in resolution to a few pC. A way to simply measure lower charge would be to use the linear relation, existing before saturation regime, between the incident charge and the total light intensity emitted by a YAG screen. Measurement has been performed on PHIL accelerator at LAL, with charge lower than 50pC, with a YAG screen located just in front of a Faraday Cup. It shows a very good linear response of the YAG screen up to the Faraday Cup resolution limit (2pC) and therefore allows calibrating the YAG screen for lower charge measurement with an estimated precision of 4%. A noise analysis allows estimating the YAG screen resolution limit around 40fC. Results of low charge measurement on PHIL will be shown and compared to those coming from a diamond detector installed on PHIL, in order to validate the measurement principle and to determine its precision and resolution limit. Such simple measurement may thereafter be used as single-shot charge diagnostic for electron beam generated and accelerated by laser-plasma interaction.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME094

Export •

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

THPME095

Length Measurement of High-brightness Electron Beam thanks to the 3-Phase Method

3459

SUSPSNE080

use link to see paper's listing under its alternate paper code

T. Vinatier, C. Bruni, S. Chancé, P.M. Puzo
LAL, Orsay, France

The goal of 3-phase method is to determine the length of an electron beam without dedicated diagnostics by varying the measurement conditions of its energy spread, through a change in the RF phase of an accelerating structure. The originality here comes from the fact that it is applied on high-brightness electron beams of few MeV generated by RF photo-injectors. It allows testing the accuracy of 3-phase method, since the length to reconstruct is known as being that of the laser pulse generating the beam. It requires establishing the longitudinal transfer matrix of a RF photo-injector, which is difficult since the electron velocity vary from 0 to relativistic during its path*. The 3-phase method in RF photo-injector has been simulated by ASTRA and PARMELA codes, validating the principle of the method. First measurement has been done on PHIL accelerator at LAL, showing a good agreement with the expected length. I will then show results obtained at PITZ with a standing wave booster and a comparison with those coming from a Cerenkov detector. Finally, measurements at higher energy performed on the SOLEIL LINAC with travelling wave accelerating structures will be exposed.
* : K-J. Kim, “RF and Space Charge Effects in Laser-Driven RF Electron Guns”, Nucl. Instr. Meth., A275, 201 (1989)

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME095

Export •

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