SRF2023 - Table of Session: MOIAA (Facility I)

Paper	Title	Page
MOIAA01	FRIB Transition to User Operations, Power Ramp Up, and Upgrade Perspectives	1
	J. Wei, H. Ao, B. Arend, S. Beher, G. Bollen, N.K. Bultman, F. Casagrande, W. Chang, Y. Choi, S. Cogan, C. Compton, M. Cortesi, J.C. Curtin, K.D. Davidson, X.J. Du, K. Elliott, B. Ewert, A. Facco, A. Fila, K. Fukushima, V. Ganni, A. Ganshyn, T.N. Ginter, T. Glasmacher, J.-W. Guo, Y. Hao, W. Hartung, N.M. Hasan, M. Hausmann, K. Holland, H.-C. Hseuh, M. Ikegami, D.D. Jager, S. Jones, N. Joseph, T. Kanemura, S.H. Kim, C. Knowles, T. Konomi, B.R. Kortum, E. Kwan, T. Lange, M. Larmann, T.L. Larter, K. Laturkar, R.E. Laxdal, J. LeTourneau, Z. Li, S.M. Lidia, G. Machicoane, C. Magsig, P.E. Manwiller, F. Marti, T. Maruta, E.S. Metzgar, S.J. Miller, Y. Momozaki, D.G. Morris, M. Mugerian, I.N. Nesterenko, C. Nguyen, P.N. Ostroumov, M.S. Patil, A.S. Plastun, L. Popielarski, M. Portillo, J. Priller, X. Rao, M.A. Reaume, K. Saito, B.M. Sherrill, M.K. Smith, J. Song, M. Steiner, A. Stolz, O. Tarasov, B.P. Tousignant, R. Walker, X. Wang, J.D. Wenstrom, G. West, K. Witgen, M. Wright, T. Xu, Y. Yamazaki, T. Zhang, Q. Zhao, S. Zhao FRIB, East Lansing, Michigan, USA K. Hosoyama KEK, Ibaraki, Japan P. Hurh Fermilab, Batavia, Illinois, USA M.P. Kelly, Y. Momozaki ANL, Lemont, Illinois, USA R.E. Laxdal TRIUMF, Vancouver, Canada S.O. Prestemon LBNL, Berkeley, California, USA M. Wiseman JLab, Newport News, Virginia, USA
	Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661. After project completion on scope, on cost, and ahead of schedule, the Facility for Rare Isotope Beams began operations for scientific users in May of 2022. During the first 12 months of user operations, the FRIB accelerator complex delivered 5250 beam hours, including 1528 hours to nine science experiments conducted with primary beams of 36Ar, 48Ca, 70Zn, 82Se, 124Xe, and 198Pt at beam energies >200 MeV/u; 2724 hours for beam developments, studies, and tuning; and 998 hours to industrial users and non-scientific programs using the FRIB Single Event Effect (FSEE) beam line. The ramp-up to a beam power of 400 kW is planned over a six-year period; 1 kW was delivered for initial user runs from in 2022, and 5 kW was delivered as of February 2023. Upgrade plans include doubling the primary-beam energy to 400 MeV/nucleon for enhanced discovery potential (¿FRIB 400¿). This talk reports on FRIB status and progress since SRF2021, emphasizing lessons learned during the transition from beam commissioning to machine operations, challenges and resolutions for the power ramp-up, progress with accelerator improvements, and R&D for the energy upgrade.
	Slides MOIAA01 [7.037 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-SRF2023-MOIAA01
About •	Received ※ 20 June 2023 — Revised ※ 26 June 2023 — Accepted ※ 03 July 2023 — Issue date ※ 19 July 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOIAA02	Status of RAON Superconducting Linac at IBS
	Y.S. Chung IBS, Daejeon, Republic of Korea
	RAON is a rare isotope accelerator facility in Korea for basic science research by producing and accelerating Rare Isotope Beams (RIBs). RAON uses both In-Flight (IF) Fragmentation and Isotope Separation On-Line (ISOL) methods to produce various RIBs, and has a unique feature of combining the ISOL and IF for producing more exotic RIBs. The main driver for the IF system is a superconducting linear accelerator for accelerating heavy-ions, and the driver for the ISOL system is a 70 MeV proton cyclotron. After over 10 years of construction, the low energy superconducting Linac which consists of QWR and HWR cavities are installed and the initial beam commissioning is in progress. In addition, prototyping of the SSR cavities for the high energy section is under way. In this talk, we report on the progress of initial beam commissioning results of low-energy Linac and the development of the SSR cavities for high-energy Linac.
	Slides MOIAA02 [7.131 MB]
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MOIAA03	Progresses in the ESS Superconducting Linac Installation	9
	H. Przybilski ESS, Lund, Sweden
	The ESS Linac is progressing into the technical commissioning phase. The normal conducting linac up to the first 4 tanks of the DTL is being commissioned with beam. All the 13 spoke cryomodules and the 9 elliptical modules (7 MB+2 HB) foreseen for the first operation at 570 MeV on the beam dump in summer 2024 are available in Lund and waiting the completion of the cryogenic distribution system (CDS) commissioning. The test program of all the 30 elliptical cryomodules that will enable the 5 MW potential operation after the target commissioning is progressing well, as well as the installation of the RF power stations necessary up to the 2 MW stage of the first project phase. Pilot installation of one spoke and one elliptical CM in the tunnel is in progress. The talk will cover the status of the component deliveries from the partners, the CM preparation and SRF activities at the ESS test stands, with the resolution of several non-conformities, and the experience of the pilot installations and technical commissioning activities in the accelerator tunnel.
	Slides MOIAA03 [9.000 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-SRF2023-MOIAA03
About •	Received ※ 26 June 2023 — Revised ※ 28 June 2023 — Accepted ※ 29 June 2023 — Issue date ※ 13 July 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOIAA04	Commissioning and First Operation of the LCLS-II Linac
	D. Gonnella SLAC, Menlo Park, California, USA
	Funding: US DOE and the LCLS-II project The LCLS-II project installed a new superconducting linac at SLAC to enable free electron laser science at repetition rates up to 1 MHz. The installed 35 1.3 GHz cryomodules will produce a beam with energy of at least 4 GeV. Installation and commissioning of the cryomodules and warm beamline sections is now complete and the results have been excellent. Here we report on these results, primarily the performance of the SRF cavities in the installed linac, demonstrating no loss in performance from the installation compared with cryomodule acceptance testing at Fermilab and Jefferson Lab and achieving the high Q₀ that was developed through nitrogen doping. We also report on the cool down of the integrated cryoplant-linac system which enabled the high Q₀ performance as well as the beam commissioning through the LCLS-II cryomodules for the first time as well as the outlook for the future LCLS-II-HE upgrade.
	Slides MOIAA04 [11.755 MB]
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MOIAA05	Commissioning of the Second JLAB C75 Cryomodule & Performance Evaluation of Installed C75 Cavities	14
	M.D. McCaughan, G. Ciovati, G.K. Davis, M.A. Drury, T. Powers, A.V. Reilly JLab, Newport News, Virginia, USA
	Funding: This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract DE-AC05-06OR23177. JLAB has long been a hub of SRF technology with the CEBAF accelerator as one of its first large scale adopters. As SRF technology has advanced, the C50 and C100 programs have allowed for the extension of CEBAF’s total energy to 6 GeV and nearly 12 GeV respectively. Along with the increase in energy reach, rates of accelerating gradient degradation have been extracted for these cryomodule designs. A plan to mitigate these losses & maintain robust gradient headroom to deliver the 12 GeV program ¿ the CEBAF Performance Plan¿ established a multi-year effort of cryomodule refurbishments and replacements. Part of this plan included a cost optimization of the C50 program with more modern processing techniques and the replacement of existing cavities with larger grain boundary cavities produced from ingot Niobium (dubbed C75 for 75 MeV gain). Reports have been made on the prototype pair of C75 cavities installed in a C50 cryomodule and the first full C75 cryomodule installed in 2017 and 2021. This paper reports on the results from the qualification of the cavities for the second C75 module in both a vertical cryostat and the commissioning results of the cryomodule in the CEBAF tunnel.
	Slides MOIAA05 [1.810 MB]
DOI •	reference for this paper ※ doi:10.18429/JACoW-SRF2023-MOIAA05
About •	Received ※ 19 June 2023 — Revised ※ 27 June 2023 — Accepted ※ 28 June 2023 — Issue date ※ 02 July 2023
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

MOIAA06	Status of Cavity and Cryomodule Production for LCLS-II-HE
	M. Checchin Fermilab, Batavia, Illinois, USA
	The LCLS-II HE project is the energy upgrade to the superconducting LCLS-II linac. It consists in adding twenty-three additional 1.3 GHz cryomodules to the linac, with cavities operating at a gradient of 20.8 MV/m with internal quality factor of 2.7·10¹⁰. Cavity production and cryomodule assembly are currently in full regime. Cavities are being manufactured in industry with a modified doping recipe and surface processing compared to LCLS-II production. This allows to achieve ¿ and exceed ¿ the more demanding specifications of LCLS-II-HE. The cryomodules are assembled and tested at the two partners labs (Fermilab and Jefferson Lab) similarly to LCLS-II and then delivered at SLAC. Test data demonstrate the high performance of the cryomodules currently being assembled: the usable voltage gain per cryomodule is in average 206.8 MV, exceeding specification by 34 MV, and the average Q-factor at 20.8 MV/m is 3·10¹⁰. Based on the current data, we expect to continue delivering high performance cryomodules and move successfully to the installation phase of the project.
	Slides MOIAA06 [9.742 MB]
Cite •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

FRIB Transition to User Operations, Power Ramp Up, and Upgrade Perspectives

1

J. Wei, H. Ao, B. Arend, S. Beher, G. Bollen, N.K. Bultman, F. Casagrande, W. Chang, Y. Choi, S. Cogan, C. Compton, M. Cortesi, J.C. Curtin, K.D. Davidson, X.J. Du, K. Elliott, B. Ewert, A. Facco, A. Fila, K. Fukushima, V. Ganni, A. Ganshyn, T.N. Ginter, T. Glasmacher, J.-W. Guo, Y. Hao, W. Hartung, N.M. Hasan, M. Hausmann, K. Holland, H.-C. Hseuh, M. Ikegami, D.D. Jager, S. Jones, N. Joseph, T. Kanemura, S.H. Kim, C. Knowles, T. Konomi, B.R. Kortum, E. Kwan, T. Lange, M. Larmann, T.L. Larter, K. Laturkar, R.E. Laxdal, J. LeTourneau, Z. Li, S.M. Lidia, G. Machicoane, C. Magsig, P.E. Manwiller, F. Marti, T. Maruta, E.S. Metzgar, S.J. Miller, Y. Momozaki, D.G. Morris, M. Mugerian, I.N. Nesterenko, C. Nguyen, P.N. Ostroumov, M.S. Patil, A.S. Plastun, L. Popielarski, M. Portillo, J. Priller, X. Rao, M.A. Reaume, K. Saito, B.M. Sherrill, M.K. Smith, J. Song, M. Steiner, A. Stolz, O. Tarasov, B.P. Tousignant, R. Walker, X. Wang, J.D. Wenstrom, G. West, K. Witgen, M. Wright, T. Xu, Y. Yamazaki, T. Zhang, Q. Zhao, S. Zhao
FRIB, East Lansing, Michigan, USA
K. Hosoyama
KEK, Ibaraki, Japan
P. Hurh
Fermilab, Batavia, Illinois, USA
M.P. Kelly, Y. Momozaki
ANL, Lemont, Illinois, USA
R.E. Laxdal
TRIUMF, Vancouver, Canada
S.O. Prestemon
LBNL, Berkeley, California, USA
M. Wiseman
JLab, Newport News, Virginia, USA

Funding: Work supported by the U.S. Department of Energy Office of Science under Cooperative Agreement DE-SC0000661.
After project completion on scope, on cost, and ahead of schedule, the Facility for Rare Isotope Beams began operations for scientific users in May of 2022. During the first 12 months of user operations, the FRIB accelerator complex delivered 5250 beam hours, including 1528 hours to nine science experiments conducted with primary beams of 36Ar, 48Ca, 70Zn, 82Se, 124Xe, and 198Pt at beam energies >200 MeV/u; 2724 hours for beam developments, studies, and tuning; and 998 hours to industrial users and non-scientific programs using the FRIB Single Event Effect (FSEE) beam line. The ramp-up to a beam power of 400 kW is planned over a six-year period; 1 kW was delivered for initial user runs from in 2022, and 5 kW was delivered as of February 2023. Upgrade plans include doubling the primary-beam energy to 400 MeV/nucleon for enhanced discovery potential (¿FRIB 400¿). This talk reports on FRIB status and progress since SRF2021, emphasizing lessons learned during the transition from beam commissioning to machine operations, challenges and resolutions for the power ramp-up, progress with accelerator improvements, and R&D for the energy upgrade.

Slides MOIAA01 [7.037 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-SRF2023-MOIAA01

About •

Received ※ 20 June 2023 — Revised ※ 26 June 2023 — Accepted ※ 03 July 2023 — Issue date ※ 19 July 2023

Cite •

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

MOIAA02

Status of RAON Superconducting Linac at IBS

Y.S. Chung
IBS, Daejeon, Republic of Korea

RAON is a rare isotope accelerator facility in Korea for basic science research by producing and accelerating Rare Isotope Beams (RIBs). RAON uses both In-Flight (IF) Fragmentation and Isotope Separation On-Line (ISOL) methods to produce various RIBs, and has a unique feature of combining the ISOL and IF for producing more exotic RIBs. The main driver for the IF system is a superconducting linear accelerator for accelerating heavy-ions, and the driver for the ISOL system is a 70 MeV proton cyclotron. After over 10 years of construction, the low energy superconducting Linac which consists of QWR and HWR cavities are installed and the initial beam commissioning is in progress. In addition, prototyping of the SSR cavities for the high energy section is under way. In this talk, we report on the progress of initial beam commissioning results of low-energy Linac and the development of the SSR cavities for high-energy Linac.

Slides MOIAA02 [7.131 MB]

Cite •

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

MOIAA03

Progresses in the ESS Superconducting Linac Installation

9

H. Przybilski
ESS, Lund, Sweden

The ESS Linac is progressing into the technical commissioning phase. The normal conducting linac up to the first 4 tanks of the DTL is being commissioned with beam. All the 13 spoke cryomodules and the 9 elliptical modules (7 MB+2 HB) foreseen for the first operation at 570 MeV on the beam dump in summer 2024 are available in Lund and waiting the completion of the cryogenic distribution system (CDS) commissioning. The test program of all the 30 elliptical cryomodules that will enable the 5 MW potential operation after the target commissioning is progressing well, as well as the installation of the RF power stations necessary up to the 2 MW stage of the first project phase. Pilot installation of one spoke and one elliptical CM in the tunnel is in progress. The talk will cover the status of the component deliveries from the partners, the CM preparation and SRF activities at the ESS test stands, with the resolution of several non-conformities, and the experience of the pilot installations and technical commissioning activities in the accelerator tunnel.

Slides MOIAA03 [9.000 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-SRF2023-MOIAA03

About •

Received ※ 26 June 2023 — Revised ※ 28 June 2023 — Accepted ※ 29 June 2023 — Issue date ※ 13 July 2023

Cite •

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

MOIAA04

Commissioning and First Operation of the LCLS-II Linac

D. Gonnella
SLAC, Menlo Park, California, USA

Funding: US DOE and the LCLS-II project
The LCLS-II project installed a new superconducting linac at SLAC to enable free electron laser science at repetition rates up to 1 MHz. The installed 35 1.3 GHz cryomodules will produce a beam with energy of at least 4 GeV. Installation and commissioning of the cryomodules and warm beamline sections is now complete and the results have been excellent. Here we report on these results, primarily the performance of the SRF cavities in the installed linac, demonstrating no loss in performance from the installation compared with cryomodule acceptance testing at Fermilab and Jefferson Lab and achieving the high Q₀ that was developed through nitrogen doping. We also report on the cool down of the integrated cryoplant-linac system which enabled the high Q₀ performance as well as the beam commissioning through the LCLS-II cryomodules for the first time as well as the outlook for the future LCLS-II-HE upgrade.

Slides MOIAA04 [11.755 MB]

Cite •

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

MOIAA05

Commissioning of the Second JLAB C75 Cryomodule & Performance Evaluation of Installed C75 Cavities

14

M.D. McCaughan, G. Ciovati, G.K. Davis, M.A. Drury, T. Powers, A.V. Reilly
JLab, Newport News, Virginia, USA

Funding: This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract DE-AC05-06OR23177.
JLAB has long been a hub of SRF technology with the CEBAF accelerator as one of its first large scale adopters. As SRF technology has advanced, the C50 and C100 programs have allowed for the extension of CEBAF’s total energy to 6 GeV and nearly 12 GeV respectively. Along with the increase in energy reach, rates of accelerating gradient degradation have been extracted for these cryomodule designs. A plan to mitigate these losses & maintain robust gradient headroom to deliver the 12 GeV program ¿ the CEBAF Performance Plan¿ established a multi-year effort of cryomodule refurbishments and replacements. Part of this plan included a cost optimization of the C50 program with more modern processing techniques and the replacement of existing cavities with larger grain boundary cavities produced from ingot Niobium (dubbed C75 for 75 MeV gain). Reports have been made on the prototype pair of C75 cavities installed in a C50 cryomodule and the first full C75 cryomodule installed in 2017 and 2021. This paper reports on the results from the qualification of the cavities for the second C75 module in both a vertical cryostat and the commissioning results of the cryomodule in the CEBAF tunnel.

Slides MOIAA05 [1.810 MB]

DOI •

reference for this paper ※ doi:10.18429/JACoW-SRF2023-MOIAA05

About •

Received ※ 19 June 2023 — Revised ※ 27 June 2023 — Accepted ※ 28 June 2023 — Issue date ※ 02 July 2023

Cite •

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

MOIAA06

Status of Cavity and Cryomodule Production for LCLS-II-HE

M. Checchin
Fermilab, Batavia, Illinois, USA

The LCLS-II HE project is the energy upgrade to the superconducting LCLS-II linac. It consists in adding twenty-three additional 1.3 GHz cryomodules to the linac, with cavities operating at a gradient of 20.8 MV/m with internal quality factor of 2.7·10¹⁰. Cavity production and cryomodule assembly are currently in full regime. Cavities are being manufactured in industry with a modified doping recipe and surface processing compared to LCLS-II production. This allows to achieve ¿ and exceed ¿ the more demanding specifications of LCLS-II-HE. The cryomodules are assembled and tested at the two partners labs (Fermilab and Jefferson Lab) similarly to LCLS-II and then delivered at SLAC. Test data demonstrate the high performance of the cryomodules currently being assembled: the usable voltage gain per cryomodule is in average 206.8 MV, exceeding specification by 34 MV, and the average Q-factor at 20.8 MV/m is 3·10¹⁰. Based on the current data, we expect to continue delivering high performance cryomodules and move successfully to the installation phase of the project.

Slides MOIAA06 [9.742 MB]

Cite •

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