HB2016 - Table of Session: TUD2 (Working Group D

Paper

Title

Page

ESS Linac Plans for Commissioning and Initial Operations

342

R. Miyamoto, M. Eshraqi, M. Muñoz
ESS, Lund, Sweden

Beam commissioning of the proton linac of the European Spallation Source (ESS) is planned to be conducted in 2018 and 2019. At this stage, the last 21 cryomodules are not yet installed and the maximum beam energy and power are 570 MeV and 1.4 MW, with respect to the nominal 2 GeV and 5 MW. The linac will be operated in this condition until the remaining cyromodules are installed in two stages in 2021 and 2022. On top of the common challenges of beam dynamics and machine protection, commissioning of a large scale machine, such as the ESS linac within a relatively short integrated time of less than 40 weeks imposes an additional challenge to the scheduling and planning. This paper lays out the current plans of the ESS linac for its beam commissioning as well as the initial operation.

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reference for this paper ※ DOI:10.18429/JACoW-HB2016-TUPM5Y01

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TUPM6Y01

Commissioning of C-ADS Injector I

348

J.S. Cao, H. Geng, R.L. Liu, C. Meng, Y.F. Sui, F. Yan, Q. Ye
IHEP, Beijing, People's Republic of China

As a test facility, the design goal of C-ADS Injector I is a 10mA, 10MeV CW proton linac, which uses a 3.2MeV normal conducting RFQ and superconducting single-spoke cavities for accelerating. The RF frequency of C-ADS Injector I accelerator is 325 MHz. In accordance to the progress of construction and considering the technical difficulties, the beam commissioning of C-ADS Injector I is carried out in 3 phases: Phase 1, with ECRIS + LEBT + RFQ + MEBT + TCM (two superconducting cavities), to reach 3.6 MeV; Phase 2, with ECRIS + LEBT + RFQ + MEBT + CM1 (seven superconducting cavities), to reach 5 MeV; Phase 3, with ECRIS + LEBT + RFQ + MEBT + CM¹⁺ CM2 (same as CM1), to finally achieve the design goal of C-ADS Injector I. This paper summarizes the beam commissioning in 3 phases and focusing on the third phase.

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reference for this paper ※ DOI:10.18429/JACoW-HB2016-TUPM6Y01

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TUPM7Y01

SPIRAL 2 Commissioning Status

J.-M. Lagniel
GANIL, Caen, France

The first phase of the SPIRAL 2 project dealing with the high-power superconducting linac and the two experimental areas called Neutron for Science (NfS) and Super Separator Spectrometer (S3) is well advanced. The project has entered in a phase during which the linac components are successively installed and commissioned (the first beam was produced in December 2014). After having briefly recalled the project scope and parameters, the way the accelerator installation and commissioning are done is presented.

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TUPM8Y01

Lessons of High-power CW Beam Commissioning of Injector II of Chinese ADS

H. Jia, W. Chang, W.L. Chen, W.P. Dou, C. Feng, Z. Gao, Y. He, Y. Tao, W.S. Wang, Z.J. Wang, J.X. Wu, Q. Wu, Z. Xue, Y.J. Yuan, Y. Zhang, H.W. Zhao
IMP/CAS, Lanzhou, People's Republic of China

Funding: Supported by CAS Strategic Priority Research Program-Future Advanced Nuclear Fission Energy, and also by National Natural Science Foundation of China (11525523).
The Chinese ADS Injector II has commissioned CW proton beam to 4.6 MeV, 3.9 mA with superconducting linac. Lessons of high-power beam commissioning, including lattice settings, phase scan, power ramping procedure and accidents will be presented.

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TUPM9Y01

Observations of Coupling During Accumulation Using a Non-Destructive Electron Scanner in the Spallation Neutron Source Accumulator Ring

351

R.E. Potts
ORNL RAD, Oak Ridge, Tennessee, USA
W. Blokland, S.M. Cousineau, J.A. Holmes
ORNL, Oak Ridge, Tennessee, USA

An electron scanner has been installed in the accumulator ring of the Spallation Neutron Source (SNS). The non-destructive device permits turn-by-turn measurements of the horizontal and vertical profiles of the proton beam during accumulation with fine longitudinal resolution. In this study the device is used to identify the source of transverse coupling in the SNS ring and to understand the impact of space charge on the evolution of the coupled beam. We present experimental observations of coupling dependent on tune, injected intensity, and accumulated intensity for a simplified accumulation scenario with no RF and no injection painting. We also investigate the effects of varying the skew quadrupoles and tune for beams with the SNS production-style ring injection and ring RF patterns.

Slides TUPM9Y01 [3.849 MB]

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reference for this paper ※ DOI:10.18429/JACoW-HB2016-TUPM9Y01

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Paper	Title	Page
TUPM5Y01	ESS Linac Plans for Commissioning and Initial Operations	342
	R. Miyamoto, M. Eshraqi, M. Muñoz ESS, Lund, Sweden
	Beam commissioning of the proton linac of the European Spallation Source (ESS) is planned to be conducted in 2018 and 2019. At this stage, the last 21 cryomodules are not yet installed and the maximum beam energy and power are 570 MeV and 1.4 MW, with respect to the nominal 2 GeV and 5 MW. The linac will be operated in this condition until the remaining cyromodules are installed in two stages in 2021 and 2022. On top of the common challenges of beam dynamics and machine protection, commissioning of a large scale machine, such as the ESS linac within a relatively short integrated time of less than 40 weeks imposes an additional challenge to the scheduling and planning. This paper lays out the current plans of the ESS linac for its beam commissioning as well as the initial operation.
	Slides TUPM5Y01 [3.651 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-HB2016-TUPM5Y01
Export •	reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPM6Y01	Commissioning of C-ADS Injector I	348
	J.S. Cao, H. Geng, R.L. Liu, C. Meng, Y.F. Sui, F. Yan, Q. Ye IHEP, Beijing, People's Republic of China
	As a test facility, the design goal of C-ADS Injector I is a 10mA, 10MeV CW proton linac, which uses a 3.2MeV normal conducting RFQ and superconducting single-spoke cavities for accelerating. The RF frequency of C-ADS Injector I accelerator is 325 MHz. In accordance to the progress of construction and considering the technical difficulties, the beam commissioning of C-ADS Injector I is carried out in 3 phases: Phase 1, with ECRIS + LEBT + RFQ + MEBT + TCM (two superconducting cavities), to reach 3.6 MeV; Phase 2, with ECRIS + LEBT + RFQ + MEBT + CM1 (seven superconducting cavities), to reach 5 MeV; Phase 3, with ECRIS + LEBT + RFQ + MEBT + CM¹⁺ CM2 (same as CM1), to finally achieve the design goal of C-ADS Injector I. This paper summarizes the beam commissioning in 3 phases and focusing on the third phase.
	Slides TUPM6Y01 [3.617 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-HB2016-TUPM6Y01
Export •	reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPM7Y01	SPIRAL 2 Commissioning Status
	J.-M. Lagniel GANIL, Caen, France
	The first phase of the SPIRAL 2 project dealing with the high-power superconducting linac and the two experimental areas called Neutron for Science (NfS) and Super Separator Spectrometer (S3) is well advanced. The project has entered in a phase during which the linac components are successively installed and commissioned (the first beam was produced in December 2014). After having briefly recalled the project scope and parameters, the way the accelerator installation and commissioning are done is presented.
	Slides TUPM7Y01 [11.287 MB]
Export •	reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPM8Y01	Lessons of High-power CW Beam Commissioning of Injector II of Chinese ADS
	H. Jia, W. Chang, W.L. Chen, W.P. Dou, C. Feng, Z. Gao, Y. He, Y. Tao, W.S. Wang, Z.J. Wang, J.X. Wu, Q. Wu, Z. Xue, Y.J. Yuan, Y. Zhang, H.W. Zhao IMP/CAS, Lanzhou, People's Republic of China
	Funding: Supported by CAS Strategic Priority Research Program-Future Advanced Nuclear Fission Energy, and also by National Natural Science Foundation of China (11525523). The Chinese ADS Injector II has commissioned CW proton beam to 4.6 MeV, 3.9 mA with superconducting linac. Lessons of high-power beam commissioning, including lattice settings, phase scan, power ramping procedure and accidents will be presented.
	Slides TUPM8Y01 [8.402 MB]
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TUPM9Y01	Observations of Coupling During Accumulation Using a Non-Destructive Electron Scanner in the Spallation Neutron Source Accumulator Ring	351
	R.E. Potts ORNL RAD, Oak Ridge, Tennessee, USA W. Blokland, S.M. Cousineau, J.A. Holmes ORNL, Oak Ridge, Tennessee, USA
	An electron scanner has been installed in the accumulator ring of the Spallation Neutron Source (SNS). The non-destructive device permits turn-by-turn measurements of the horizontal and vertical profiles of the proton beam during accumulation with fine longitudinal resolution. In this study the device is used to identify the source of transverse coupling in the SNS ring and to understand the impact of space charge on the evolution of the coupled beam. We present experimental observations of coupling dependent on tune, injected intensity, and accumulated intensity for a simplified accumulation scenario with no RF and no injection painting. We also investigate the effects of varying the skew quadrupoles and tune for beams with the SNS production-style ring injection and ring RF patterns.
	Slides TUPM9Y01 [3.849 MB]
DOI •	reference for this paper ※ DOI:10.18429/JACoW-HB2016-TUPM9Y01
Export •	reference for this paper to ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)