NAPAC2016 - Table of Session: THA1 (Oral Presentations (MC7))

Paper	Title	Page
THA1IO01	Progress in High Q SRF cavities development: from Single Cell to Cryomodule
	A. Grassellino Fermilab, Batavia, Illinois, USA
	This talk will present the summary of the latest progress in nitrogen doping and magnetic flux reduction strategies, starting from the knowledge of the basic phenomena developed via single cell cavities studies in vertical and horizontal cryogenic dewars and via advanced surface studies of samples, to the implementation in an actual large scale cryomodule. Results of studies of the quality factors as a function of cooldown details though critical temperature for the first LCLS2 prototype cryomodule will be presented.
	Slides THA1IO01 [14.887 MB]
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THA1IO02	Results of the 2015 Helium Processing of CEBAF Cryomodules	1054
	M.A. Drury, F. Humphry, L.K. King, M.D. McCaughan, A.D. Solopova JLab, Newport News, Virginia, USA
	The CEBAF accelerator at Jefferson Lab consists of an injector and two linacs connected by arcs. Each linac contains 25 cryomodules that are designed to deliver an integrated energy of 2.2 GeV per pass to an electron beam in order to meet 12 GeV energy requirements. Helium processing is a processing technique that is used to reduce field emission (FE) in SRF cavities. Helium processing of the 50 installed linac cryomodules was seen as necessary to support 12 GeV energy requirements. This paper will describe the processing procedure and summarize the results of this effort. Notice: Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177. The U.S. Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce this manuscript for U.S. Government purposes.
	Slides THA1IO02 [3.803 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-THA1IO02
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THA1CO03	MAX IV and Solaris 1.5 GeV Storage Rings Magnet Block Production Series Measurement Results	1058
MOPOB80	use link to see paper's listing under its alternate paper code
	M.A.G. Johansson MAX IV Laboratory, Lund University, Lund, Sweden K. Karaś Solaris National Synchrotron Radiation Centre, Jagiellonian University, Kraków, Poland R. Nietubyć NCBJ, Świerk/Otwock, Poland
	The magnet design of the MAX IV and Solaris 1.5 GeV storage rings replaces the conventional support girder + discrete magnets scheme of previous third-generation synchrotron radiation light sources with an integrated design having several consecutive magnet elements precision-machined out of a common solid iron block, with mechanical tolerances of ±0.02 mm over the 4.5 m block length. The production series of 12+12 integrated magnet block units, which was totally outsourced to industry, was completed in the spring of 2015, with mechanical and magnetic QA conforming to specifications. This article presents mechanical and magnetic field measurement results of the full production series.
	Slides THA1CO03 [7.517 MB]
	Poster THA1CO03 [1.117 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-THA1CO03
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THA1CO04	Persistent Current Effect in 15-16 T Nb3Sn Accelerator Dipoles and its Correction	1061
	A.V. Zlobin, V.V. Kashikhin Fermilab, Batavia, Illinois, USA
	Funding: * This work is supported by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy. Nb3Sn magnets with operating fields of 15-16 T are considered for the LHC Energy Doubler and a future Very High Energy pp Collider. Due to large coil volume, high critical current density and large superconducting (SC) filament size the persistent current effect is very large in Nb3Sn dipoles al low fields. This paper presents the results of analysis of the persistent current effect in the 15 T Nb3Sn dipole demonstrator being developed at FNAL, and describes different possibilities of its correction including passive SC wires, iron shims and coil geometry.
	Slides THA1CO04 [3.440 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-THA1CO04
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THA1CO05	Thermal Modeling and Cryogenic Design of a Helical Superconducting Undulator Cryostat	1064
	Y. Shiroyanagi, J.D. Fuerst, Q.B. Hasse, Y. Ivanyushenkov ANL, Argonne, Illinois, USA
	A conceptual design for a helical superconducting undulator (HSCU) for the Advanced Photon Source (APS) at Argonne National Laboratory (ANL) has been completed. The device differs sufficiently from the existing APS planar superconducting undulator (SCU) design to warrant development of a new cryostat based on value engineering and lessons learned from the existing planar SCU. Changes include optimization of the existing cryocooler-based refrigeration system and thermal shield as well as cost reduction through the use of standard vacuum hardware. The end result is a design that provides significantly larger 4.2 K refrigeration margin in a smaller package for greater installation flexibility in the APS storage ring. This paper presents ANSYS-based thermal analysis of the cryostat, including estimated static and dynamic (beam-induced) heating, and compares the new design with the existing planar SCU cryostat. Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357.
	Slides THA1CO05 [3.905 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-THA1CO05
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THA1CO06	Status of the Development of Superconducting Undulators for Storage Rings and Free Electron Lasers at the Advanced Photon Source	1068
	Y. Ivanyushenkov, C.L. Doose, J.F. Fuerst, E. Gluskin, K.C. Harkay, Q.B. Hasse, M. Kasa, Y. Shiroyanagi, D. Skiadopoulos, E. Trakhtenberg ANL, Argonne, Illinois, USA P. Emma SLAC, Menlo Park, California, USA
	Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357. Development of superconducting undulator (SCU) technology continues at the Advanced Photon Source (APS). Experience of building and successful operation of the first short-length, 16-mm period length superconducting undulator SCU0 paved a way for the second 1-m long, 18-mm period device, SCU1, which is in operation since May 2015. The APS SCU team has also built and tested a 1.5-m long, 21-mm period undulator as a part of LCLS SCU R&D program aiming at demonstration of SCU technology availability for free electron lasers. This undulator successfully achieved all the requirements including a phase error of 5 degree rms. Our team is currently completing one more 1-m, 18-mm period undulator that will replace the SCU0. We are also working on a helical SCU for the APS. The status of these projects will be presented.
	Slides THA1CO06 [3.545 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-THA1CO06
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

THA1IO01

Progress in High Q SRF cavities development: from Single Cell to Cryomodule

A. Grassellino
Fermilab, Batavia, Illinois, USA

This talk will present the summary of the latest progress in nitrogen doping and magnetic flux reduction strategies, starting from the knowledge of the basic phenomena developed via single cell cavities studies in vertical and horizontal cryogenic dewars and via advanced surface studies of samples, to the implementation in an actual large scale cryomodule. Results of studies of the quality factors as a function of cooldown details though critical temperature for the first LCLS2 prototype cryomodule will be presented.

Slides THA1IO01 [14.887 MB]

Export •

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

THA1IO02

Results of the 2015 Helium Processing of CEBAF Cryomodules

1054

M.A. Drury, F. Humphry, L.K. King, M.D. McCaughan, A.D. Solopova
JLab, Newport News, Virginia, USA

The CEBAF accelerator at Jefferson Lab consists of an injector and two linacs connected by arcs. Each linac contains 25 cryomodules that are designed to deliver an integrated energy of 2.2 GeV per pass to an electron beam in order to meet 12 GeV energy requirements. Helium processing is a processing technique that is used to reduce field emission (FE) in SRF cavities. Helium processing of the 50 installed linac cryomodules was seen as necessary to support 12 GeV energy requirements. This paper will describe the processing procedure and summarize the results of this effort. Notice: Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177. The U.S. Government retains a non-exclusive, paid-up, irrevocable, world-wide license to publish or reproduce this manuscript for U.S. Government purposes.

Slides THA1IO02 [3.803 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-THA1IO02

Export •

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

THA1CO03

MAX IV and Solaris 1.5 GeV Storage Rings Magnet Block Production Series Measurement Results

1058

MOPOB80

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

M.A.G. Johansson
MAX IV Laboratory, Lund University, Lund, Sweden
K. Karaś
Solaris National Synchrotron Radiation Centre, Jagiellonian University, Kraków, Poland
R. Nietubyć
NCBJ, Świerk/Otwock, Poland

The magnet design of the MAX IV and Solaris 1.5 GeV storage rings replaces the conventional support girder + discrete magnets scheme of previous third-generation synchrotron radiation light sources with an integrated design having several consecutive magnet elements precision-machined out of a common solid iron block, with mechanical tolerances of ±0.02 mm over the 4.5 m block length. The production series of 12+12 integrated magnet block units, which was totally outsourced to industry, was completed in the spring of 2015, with mechanical and magnetic QA conforming to specifications. This article presents mechanical and magnetic field measurement results of the full production series.

Slides THA1CO03 [7.517 MB]

Poster THA1CO03 [1.117 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-THA1CO03

Export •

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

THA1CO04

Persistent Current Effect in 15-16 T Nb3Sn Accelerator Dipoles and its Correction

1061

A.V. Zlobin, V.V. Kashikhin
Fermilab, Batavia, Illinois, USA

Funding: * This work is supported by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy.
Nb3Sn magnets with operating fields of 15-16 T are considered for the LHC Energy Doubler and a future Very High Energy pp Collider. Due to large coil volume, high critical current density and large superconducting (SC) filament size the persistent current effect is very large in Nb3Sn dipoles al low fields. This paper presents the results of analysis of the persistent current effect in the 15 T Nb3Sn dipole demonstrator being developed at FNAL, and describes different possibilities of its correction including passive SC wires, iron shims and coil geometry.

Slides THA1CO04 [3.440 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-THA1CO04

Export •

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

THA1CO05

Thermal Modeling and Cryogenic Design of a Helical Superconducting Undulator Cryostat

1064

Y. Shiroyanagi, J.D. Fuerst, Q.B. Hasse, Y. Ivanyushenkov
ANL, Argonne, Illinois, USA

A conceptual design for a helical superconducting undulator (HSCU) for the Advanced Photon Source (APS) at Argonne National Laboratory (ANL) has been completed. The device differs sufficiently from the existing APS planar superconducting undulator (SCU) design to warrant development of a new cryostat based on value engineering and lessons learned from the existing planar SCU. Changes include optimization of the existing cryocooler-based refrigeration system and thermal shield as well as cost reduction through the use of standard vacuum hardware. The end result is a design that provides significantly larger 4.2 K refrigeration margin in a smaller package for greater installation flexibility in the APS storage ring. This paper presents ANSYS-based thermal analysis of the cryostat, including estimated static and dynamic (beam-induced) heating, and compares the new design with the existing planar SCU cryostat.
Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357.

Slides THA1CO05 [3.905 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-THA1CO05

Export •

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

THA1CO06

Status of the Development of Superconducting Undulators for Storage Rings and Free Electron Lasers at the Advanced Photon Source

1068

Y. Ivanyushenkov, C.L. Doose, J.F. Fuerst, E. Gluskin, K.C. Harkay, Q.B. Hasse, M. Kasa, Y. Shiroyanagi, D. Skiadopoulos, E. Trakhtenberg
ANL, Argonne, Illinois, USA
P. Emma
SLAC, Menlo Park, California, USA

Funding: Work supported by the U.S. Department of Energy, Office of Science, under Contract No. DE-AC02-06CH11357.
Development of superconducting undulator (SCU) technology continues at the Advanced Photon Source (APS). Experience of building and successful operation of the first short-length, 16-mm period length superconducting undulator SCU0 paved a way for the second 1-m long, 18-mm period device, SCU1, which is in operation since May 2015. The APS SCU team has also built and tested a 1.5-m long, 21-mm period undulator as a part of LCLS SCU R&D program aiming at demonstration of SCU technology availability for free electron lasers. This undulator successfully achieved all the requirements including a phase error of 5 degree rms. Our team is currently completing one more 1-m, 18-mm period undulator that will replace the SCU0. We are also working on a helical SCU for the APS. The status of these projects will be presented.

Slides THA1CO06 [3.545 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-NAPAC2016-THA1CO06

Export •

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