IBIC2017 - List of Authors (Le Parquier, M.)

Paper	Title	Page
TU1AB2	High Repetition-Rate Electro-optic Sampling: Recent Studies Using Photonic Time-Stretch	121
	S. Bielawski, M. Le Parquier PhLAM/CERCLA, Villeneuve d'Ascq Cedex, France E. Blomley, E. Bründermann, S. Funkner, A.-S. Müller, M.J. Nasse, G. Niehues, M. Schuh, P. Schönfeldt, J.L. Steinmann, S.W. Walter KIT, Karlsruhe, Germany J.B. Brubach, L. Manceron, P. Roy, M.-A. Tordeux SOLEIL, Gif-sur-Yvette, France C. Evain, C. Szwaj PhLAM/CERLA, Villeneuve d'Ascq, France N. Hiller PSI, Villigen PSI, Switzerland E. Roussel Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy
	Single-shot electro-optic sampling (EOS) is a powerful characterization tool for monitoring the shape of electron bunches, and coherent synchrotron radiation pulses. For reaching high acquisition rates, an efficient possibility consists to associate classic EOS systems with the so-called photonic time-stretch technique [1]. We present recent results obtained at SOLEIL and ANKA using this strategy. In particular, we show how a high sensitivity variant of photonic time stretch [2] EOS enabled to monitor the CSR pulses emitted by short electron bunches at SOLEIL [3]. We could thus confirm in a very direct way the theories predicting an interplay between two physical processes. Below a critical bunch charge, we observe a train of identical THz pulses stemming from the shortness of the electron bunches. Above this threshold, CSR emission is dominated by drifting structures appearing through spontaneous self-organization. We also consider the association of time-stretch and EOS for recording electron bunch near fields at high repetition rate. We present preliminary results obtained at ANKA, aiming at recording the electron bunch shape evolution during the microbunching instability. [1] F. Coppinger et al. IEEE Trans. Microwave Theory Tech. 47, 1309 (1999). [2] C. Szwaj et al., Rev. Sci. Instruments 87, 103111 (2016). [3] C. Evain et al., Phys. Rev. Lett. 118, 054801 (2017).
	Slides TU1AB2 [72.925 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-TU1AB2
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPCC08	Improving the Sensitivity of Existing Electro-Optic Sampling Setups by Adding Brewster Plates: Tests of the Strategy at SOLEIL	164
	S. Bielawski, M. Le Parquier PhLAM/CERCLA, Villeneuve d'Ascq Cedex, France J.B. Brubach, L. Manceron, P. Roy, M.-A. Tordeux SOLEIL, Gif-sur-Yvette, France C. Evain, C. Szwaj PhLAM/CERLA, Villeneuve d'Ascq, France
	Funding: ERDF/CPER photonics for society. LABEX CEMPI Project (No. ANR-11-LABX-0007). HPC resources from GENCI TGCC/IDRIS (Grant Nos. i2015057057 and i2016057057). For improving the sensitivity of electro-optic sampling (EOS), several techniques are used. Operation of the set of polarizing elements "close to extinction" is a technique used routinely for obtaining high responsivity (i.e., a large output signal for a given input electric field). This technique is widely used for monitoring electron bunches in linear accelerators and FELs. We show that a simple modification of these EOS systems enables to increase further the SNR, by cancelling out the laser noise. The idea is to introduce a set of Brewster plates, following the idea Ahmed, Savolainen and Hamm [1] in the EOS path, and performing balanced detection. We present detailed tests of this type of upgrade on the PhLAM-SOLEIL EOS system, destined to studies of THz CSR pulse dynamics [2]. [1] Ahmed et al, Rev. Sci. Instrum. 85, 013114 (2014) [2] Szwaj et al., Review of Scientific Instruments 87, 103111 (2016)
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-TUPCC08
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

High Repetition-Rate Electro-optic Sampling: Recent Studies Using Photonic Time-Stretch

121

S. Bielawski, M. Le Parquier
PhLAM/CERCLA, Villeneuve d'Ascq Cedex, France
E. Blomley, E. Bründermann, S. Funkner, A.-S. Müller, M.J. Nasse, G. Niehues, M. Schuh, P. Schönfeldt, J.L. Steinmann, S.W. Walter
KIT, Karlsruhe, Germany
J.B. Brubach, L. Manceron, P. Roy, M.-A. Tordeux
SOLEIL, Gif-sur-Yvette, France
C. Evain, C. Szwaj
PhLAM/CERLA, Villeneuve d'Ascq, France
N. Hiller
PSI, Villigen PSI, Switzerland
E. Roussel
Elettra-Sincrotrone Trieste S.C.p.A., Basovizza, Italy

Single-shot electro-optic sampling (EOS) is a powerful characterization tool for monitoring the shape of electron bunches, and coherent synchrotron radiation pulses. For reaching high acquisition rates, an efficient possibility consists to associate classic EOS systems with the so-called photonic time-stretch technique [1]. We present recent results obtained at SOLEIL and ANKA using this strategy. In particular, we show how a high sensitivity variant of photonic time stretch [2] EOS enabled to monitor the CSR pulses emitted by short electron bunches at SOLEIL [3]. We could thus confirm in a very direct way the theories predicting an interplay between two physical processes. Below a critical bunch charge, we observe a train of identical THz pulses stemming from the shortness of the electron bunches. Above this threshold, CSR emission is dominated by drifting structures appearing through spontaneous self-organization. We also consider the association of time-stretch and EOS for recording electron bunch near fields at high repetition rate. We present preliminary results obtained at ANKA, aiming at recording the electron bunch shape evolution during the microbunching instability.
[1] F. Coppinger et al. IEEE Trans. Microwave Theory Tech. 47, 1309 (1999).
[2] C. Szwaj et al., Rev. Sci. Instruments 87, 103111 (2016).
[3] C. Evain et al., Phys. Rev. Lett. 118, 054801 (2017).

Slides TU1AB2 [72.925 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-TU1AB2

Export •

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

TUPCC08

Improving the Sensitivity of Existing Electro-Optic Sampling Setups by Adding Brewster Plates: Tests of the Strategy at SOLEIL

164

S. Bielawski, M. Le Parquier
PhLAM/CERCLA, Villeneuve d'Ascq Cedex, France
J.B. Brubach, L. Manceron, P. Roy, M.-A. Tordeux
SOLEIL, Gif-sur-Yvette, France
C. Evain, C. Szwaj
PhLAM/CERLA, Villeneuve d'Ascq, France

Funding: ERDF/CPER photonics for society. LABEX CEMPI Project (No. ANR-11-LABX-0007). HPC resources from GENCI TGCC/IDRIS (Grant Nos. i2015057057 and i2016057057).
For improving the sensitivity of electro-optic sampling (EOS), several techniques are used. Operation of the set of polarizing elements "close to extinction" is a technique used routinely for obtaining high responsivity (i.e., a large output signal for a given input electric field). This technique is widely used for monitoring electron bunches in linear accelerators and FELs. We show that a simple modification of these EOS systems enables to increase further the SNR, by cancelling out the laser noise. The idea is to introduce a set of Brewster plates, following the idea Ahmed, Savolainen and Hamm [1] in the EOS path, and performing balanced detection. We present detailed tests of this type of upgrade on the PhLAM-SOLEIL EOS system, destined to studies of THz CSR pulse dynamics [2].
[1] Ahmed et al, Rev. Sci. Instrum. 85, 013114 (2014)
[2] Szwaj et al., Review of Scientific Instruments 87, 103111 (2016)

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IBIC2017-TUPCC08

Export •

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