IPAC2022 - Classification: MC2: Photon Sources and Electron Accelerators / A18: Energy Recovery Linacs (ERLs)

Paper	Title	Page
TUPOPT048	bERLinPro Becomes SEALab: Status and Perspective of the Energy Recovery Linac at HZB	1110
	A. Neumann, B. Alberdi-Esuain, T. Birke, P. Echevarria, D. Eichel, F. Falkenstern, R. Fleischhauer, A. Frahm, F. Göbel, A. Heugel, F. Hoffmann, H. Huck, T. Kamps, S. Klauke, G. Klemz, J. Kolbe, J. Kühn, B.C. Kuske, J. Kuszynski, S. Mistry, N. Ohm, H. Ploetz, S. Rotterdam, O. Schappeit, G. Schindhelm, C. Schröder, M. Schuster, H. Stein, E. Suljoti, Y. Tamashevich, M. Tannert, J. Ullrich, A. Ushakov, J. Völker, C. Wang HZB, Berlin, Germany T. Kamps HU Berlin, Berlin, Germany
	Funding: Work supported by German Bundesministerium für Bildung und Forschung, Land Berlin, and grants of Helmholtz Association Since end of the year 2020 the energy recovery linac (ERL) project bERLinPro of Helmholtz-Zentrum Berlin has been officially completed. But what is the status of this facility, the next scientific goals in the framework of accelerator physics at HZB, what are the perspectives? To reflect the continuation of this endeavor and the broadening of applications of this machine from high current SRF based energy recovery concept up to an ultrafast electron diffraction (UED) facility producing shortest electron pulses, the facility is now named Sealab, Superconducting RF Electron Accelerator Laboratory. In this contribution, an overview of lessons learned so far, the status of the machine, the coming set up and commissioning steps with an outlook to midterm and future applications will be given. In summary, Sealab will expand, including the ERL application, and become a general accelerator physics and technology test machine to employ UED as a first study case and will also be an ideal testbed to investigate new control schemes based on digital twins or machine learning methods.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUPOPT048
About •	Received ※ 06 June 2022 — Revised ※ 13 June 2022 — Accepted ※ 14 June 2022 — Issue date ※ 03 July 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPOPT050	Investigation of Polarization Dependent Thomson Scattering in an Energy-Recovering Linear Accelerator on the Example of Mesa	1114
SUSPMF018	use link to see paper's listing under its alternate paper code
	C.L. Lorey, A. Meseck KPH, Mainz, Germany
	Funding: GRK 2128 AccelencE funded by the DFG At the Johannes Gutenberg University (JGU) in Mainz, a new accelerator is currently under construction in order to deliver electron beams of up to 155 MeV to two experiments. The Mainz Energy-recovering Superconducting Accelerator (MESA) will offer two modes of operation, one of which is an energy-recovering (ER) mode. As an ERL, MESA, with it’s high brightness electron beam, is a promising accelerator for supplying a Thomson back scattering based Gamma source. Furthermore, at MESA, the polarization of the electron beam can be set by the injector. The aim of this work is to provide a concept and comprehensive analysis of the merit and practical feasibility of a Thomson backscattering source at MESA under consideration of beam polarization and transversal effects. In this paper, an overview and results of our semi analytical approach to calculate various Thomson back scattering light source scenarios at MESA will be given. Furthermore we will discuss the benefits of using polarized electrons in combination with a polarized laser beam.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUPOPT050
About •	Received ※ 08 June 2022 — Revised ※ 11 June 2022 — Accepted ※ 16 June 2022 — Issue date ※ 26 June 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPOPT051	Reconstruction and Beam-Transport Study of the cERL Dump Line for High-Power IR-FEL Operation	1117
	N. Nakamura, K. Harada, N. Higashi, R. Kato, S. Nagahashi, K.N. Nigorikawa, T. Nogami, T. Obina, H. Sagehashi, H. Sakai, M. Shimada, R. Takai, O.A. Tanaka, Y. Tanimoto, T. Uchiyama, A. Ueda KEK, Ibaraki, Japan
	Funding: This work is supported by a NEDO project "Development of advanced laser processing with intelligence based on high-brightness and high-efficiency laser technologies." A significant FEL pulse energy was successfully generated at the cERL IR-FEL in Burst mode where a macro pulse of about 1 microsecond or less is repeated at the maximum frequency of 5 Hz. In the next step, high-power FEL operation in CW mode should be carried out with energy recovery by increasing electron bunches drastically. However, momentum spread of the electron beam increases due to the FEL-light emission and the space charge effects and may cause serious beam loss by exceeding the momentum acceptance of the cERL downstream of the FEL. Therefore, we reconstructed the dump line in Autumn 2020 in order to greatly increase the momentum acceptance with improvement of the beam-tuning flexibility. Then we performed the beam-transport study of the reconstructed dump line in March 2021 by injecting the beam directly from the injector without passing the recirculation loop. In this paper, we present the reconstructed dump line and the beam-transport study.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUPOPT051
About •	Received ※ 16 May 2022 — Revised ※ 11 June 2022 — Accepted ※ 12 June 2022 — Issue date ※ 13 June 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

THOXSP2	Brixsino High-Flux Dual X-Ray and THz Radiation Source Based on Energy Recovery Linacs	2407
	I. Drebot, F. Canella, S. Cialdi, M. Giammarchi, D. Giannotti, S. Latorre, C. Meroni, M. Rossetti Conti, A.R. Rossi, M. Ruijter, S. Samsam, L. Serafini, V. Torri INFN-Milano, Milano, Italy M.P. Abbracchio, S. Altilia, B. Paroli, A. Vanzulli Universita’ degli Studi di Milano, Milano, Italy A. Andreone, G.P. Papari Naples University Federico II, Napoli, Italy A. Bacci, M. Bertucci, A. Bosotti, F. Broggi, D. Giove, P. Michelato, L. Monaco, R. Paparella, L. Rossi, D. Sertore, M. Statera INFN/LASA, Segrate (MI), Italy R. Calandrino, A. Delvecchio HSP, Milan, Italy S. Capra, D. Cipriani, C. Lenardi, M. Opromolla, E. Suerra, A. Torresin Università degli Studi di Milano, Milano, Italy P. Cardarelli, G. Paternò, A. Taibi INFN-Ferrara, Ferrara, Italy M. Citterio Universita’ degli Studi di Milano e INFN, Milano, Italy A. Esposito LNF-INFN, Frascati, Italy R. Ferragut, G. Galzerano POLIMI, Milano, Italy C. Koral, M.R. Masullo, A. Passarelli INFN-Napoli, Napoli, Italy Z. Mazaheri, G. Mettivier, P. Russo UniNa, Napoli, Italy C. Pagani Università degli Studi di Milano & INFN, Segrate, Italy P. Paparo CNR-ISASI, Pozzuoi, Italy V. Petrillo, F. Prelz, M. Sorbi Universita’ degli Studi di Milano & INFN, Milano, Italy B. Piccirillo, A. Rubano Naples University Federico II and INFN, Napoli, Italy E. Puppin Politecnico/Milano, Milano, Italy
	We present the conceptual design of a compact light source named BriXSinO. BriXSinO was born as demonstrator of the Marix project, but it is also a dual high flux radiation source Inverse Compton Source (ICS) of X-ray and Free-Electron Laser of THz spectral range radiation conceived for medical applications and general applied research. The accelerator is a push-pull CW-SC Energy Recovery Linac (ERL) based on superconducting cavities technology and allows to sustain MW-class beam power with almost just one hundred kW active power dissipation/consumption. ICS line produces 33 keV monochromatic X-Rays via Compton scattering of the electron beam with a laser system in Fabry-Pérot cavity at a repetition rate of 100 MHz. The THz FEL oscillator is based on an undulator imbedded in optical cavity and generates THz wavelengths from 15 to 50 micron.
	Slides THOXSP2 [19.118 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-THOXSP2
About •	Received ※ 08 June 2022 — Revised ※ 12 June 2022 — Accepted ※ 15 June 2022 — Issue date ※ 16 June 2022
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

bERLinPro Becomes SEALab: Status and Perspective of the Energy Recovery Linac at HZB

1110

A. Neumann, B. Alberdi-Esuain, T. Birke, P. Echevarria, D. Eichel, F. Falkenstern, R. Fleischhauer, A. Frahm, F. Göbel, A. Heugel, F. Hoffmann, H. Huck, T. Kamps, S. Klauke, G. Klemz, J. Kolbe, J. Kühn, B.C. Kuske, J. Kuszynski, S. Mistry, N. Ohm, H. Ploetz, S. Rotterdam, O. Schappeit, G. Schindhelm, C. Schröder, M. Schuster, H. Stein, E. Suljoti, Y. Tamashevich, M. Tannert, J. Ullrich, A. Ushakov, J. Völker, C. Wang
HZB, Berlin, Germany
T. Kamps
HU Berlin, Berlin, Germany

Funding: Work supported by German Bundesministerium für Bildung und Forschung, Land Berlin, and grants of Helmholtz Association
Since end of the year 2020 the energy recovery linac (ERL) project bERLinPro of Helmholtz-Zentrum Berlin has been officially completed. But what is the status of this facility, the next scientific goals in the framework of accelerator physics at HZB, what are the perspectives? To reflect the continuation of this endeavor and the broadening of applications of this machine from high current SRF based energy recovery concept up to an ultrafast electron diffraction (UED) facility producing shortest electron pulses, the facility is now named Sealab, Superconducting RF Electron Accelerator Laboratory. In this contribution, an overview of lessons learned so far, the status of the machine, the coming set up and commissioning steps with an outlook to midterm and future applications will be given. In summary, Sealab will expand, including the ERL application, and become a general accelerator physics and technology test machine to employ UED as a first study case and will also be an ideal testbed to investigate new control schemes based on digital twins or machine learning methods.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUPOPT048

About •

Received ※ 06 June 2022 — Revised ※ 13 June 2022 — Accepted ※ 14 June 2022 — Issue date ※ 03 July 2022

Cite •

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

TUPOPT050

Investigation of Polarization Dependent Thomson Scattering in an Energy-Recovering Linear Accelerator on the Example of Mesa

1114

SUSPMF018

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

C.L. Lorey, A. Meseck
KPH, Mainz, Germany

Funding: GRK 2128 AccelencE funded by the DFG
At the Johannes Gutenberg University (JGU) in Mainz, a new accelerator is currently under construction in order to deliver electron beams of up to 155 MeV to two experiments. The Mainz Energy-recovering Superconducting Accelerator (MESA) will offer two modes of operation, one of which is an energy-recovering (ER) mode. As an ERL, MESA, with it’s high brightness electron beam, is a promising accelerator for supplying a Thomson back scattering based Gamma source. Furthermore, at MESA, the polarization of the electron beam can be set by the injector. The aim of this work is to provide a concept and comprehensive analysis of the merit and practical feasibility of a Thomson backscattering source at MESA under consideration of beam polarization and transversal effects. In this paper, an overview and results of our semi analytical approach to calculate various Thomson back scattering light source scenarios at MESA will be given. Furthermore we will discuss the benefits of using polarized electrons in combination with a polarized laser beam.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUPOPT050

About •

Received ※ 08 June 2022 — Revised ※ 11 June 2022 — Accepted ※ 16 June 2022 — Issue date ※ 26 June 2022

Cite •

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

TUPOPT051

Reconstruction and Beam-Transport Study of the cERL Dump Line for High-Power IR-FEL Operation

1117

N. Nakamura, K. Harada, N. Higashi, R. Kato, S. Nagahashi, K.N. Nigorikawa, T. Nogami, T. Obina, H. Sagehashi, H. Sakai, M. Shimada, R. Takai, O.A. Tanaka, Y. Tanimoto, T. Uchiyama, A. Ueda
KEK, Ibaraki, Japan

Funding: This work is supported by a NEDO project "Development of advanced laser processing with intelligence based on high-brightness and high-efficiency laser technologies."
A significant FEL pulse energy was successfully generated at the cERL IR-FEL in Burst mode where a macro pulse of about 1 microsecond or less is repeated at the maximum frequency of 5 Hz. In the next step, high-power FEL operation in CW mode should be carried out with energy recovery by increasing electron bunches drastically. However, momentum spread of the electron beam increases due to the FEL-light emission and the space charge effects and may cause serious beam loss by exceeding the momentum acceptance of the cERL downstream of the FEL. Therefore, we reconstructed the dump line in Autumn 2020 in order to greatly increase the momentum acceptance with improvement of the beam-tuning flexibility. Then we performed the beam-transport study of the reconstructed dump line in March 2021 by injecting the beam directly from the injector without passing the recirculation loop. In this paper, we present the reconstructed dump line and the beam-transport study.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-TUPOPT051

About •

Received ※ 16 May 2022 — Revised ※ 11 June 2022 — Accepted ※ 12 June 2022 — Issue date ※ 13 June 2022

Cite •

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

THOXSP2

Brixsino High-Flux Dual X-Ray and THz Radiation Source Based on Energy Recovery Linacs

2407

I. Drebot, F. Canella, S. Cialdi, M. Giammarchi, D. Giannotti, S. Latorre, C. Meroni, M. Rossetti Conti, A.R. Rossi, M. Ruijter, S. Samsam, L. Serafini, V. Torri
INFN-Milano, Milano, Italy
M.P. Abbracchio, S. Altilia, B. Paroli, A. Vanzulli
Universita’ degli Studi di Milano, Milano, Italy
A. Andreone, G.P. Papari
Naples University Federico II, Napoli, Italy
A. Bacci, M. Bertucci, A. Bosotti, F. Broggi, D. Giove, P. Michelato, L. Monaco, R. Paparella, L. Rossi, D. Sertore, M. Statera
INFN/LASA, Segrate (MI), Italy
R. Calandrino, A. Delvecchio
HSP, Milan, Italy
S. Capra, D. Cipriani, C. Lenardi, M. Opromolla, E. Suerra, A. Torresin
Università degli Studi di Milano, Milano, Italy
P. Cardarelli, G. Paternò, A. Taibi
INFN-Ferrara, Ferrara, Italy
M. Citterio
Universita’ degli Studi di Milano e INFN, Milano, Italy
A. Esposito
LNF-INFN, Frascati, Italy
R. Ferragut, G. Galzerano
POLIMI, Milano, Italy
C. Koral, M.R. Masullo, A. Passarelli
INFN-Napoli, Napoli, Italy
Z. Mazaheri, G. Mettivier, P. Russo
UniNa, Napoli, Italy
C. Pagani
Università degli Studi di Milano & INFN, Segrate, Italy
P. Paparo
CNR-ISASI, Pozzuoi, Italy
V. Petrillo, F. Prelz, M. Sorbi
Universita’ degli Studi di Milano & INFN, Milano, Italy
B. Piccirillo, A. Rubano
Naples University Federico II and INFN, Napoli, Italy
E. Puppin
Politecnico/Milano, Milano, Italy

We present the conceptual design of a compact light source named BriXSinO. BriXSinO was born as demonstrator of the Marix project, but it is also a dual high flux radiation source Inverse Compton Source (ICS) of X-ray and Free-Electron Laser of THz spectral range radiation conceived for medical applications and general applied research. The accelerator is a push-pull CW-SC Energy Recovery Linac (ERL) based on superconducting cavities technology and allows to sustain MW-class beam power with almost just one hundred kW active power dissipation/consumption. ICS line produces 33 keV monochromatic X-Rays via Compton scattering of the electron beam with a laser system in Fabry-Pérot cavity at a repetition rate of 100 MHz. The THz FEL oscillator is based on an undulator imbedded in optical cavity and generates THz wavelengths from 15 to 50 micron.

Slides THOXSP2 [19.118 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2022-THOXSP2

About •

Received ※ 08 June 2022 — Revised ※ 12 June 2022 — Accepted ※ 15 June 2022 — Issue date ※ 16 June 2022

Cite •

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