LINAC2016 - Table of Session: TUP106 (Poster Session)

Paper	Title	Page
TUP106001	Magnetic Field Measurements in a Cryomodule with Nearby Warm-Section Quadrupole Magnets of RAON Heavy Ion Accelerator	625
	H.J. Cha, J.W. Choi, I. Chun, M. Lee IBS, Daejeon, Republic of Korea
	For the Korean heavy ion accelerator RAON, a normal-conducting quadrupole magnet doublet with an intermediate beam diagnostic devices between two cryomodules is served for collimating the heavy ion beam. Although the fringe field of a magnet at a superconducting cavity position is low enough, differently from a strong superconducting solenoid, it can degrade the acceleration performance in the case of quench of the cavity directly and/or indirectly by contaminating the cryomodule wall and magnetic shields. In this study, we analyze the magnetic measurement results in the cryomodule assembled with the magnet doublet compared to the calculated ones and discuss the future plan.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-TUP106001
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TUP106004	Status of RRR Analysis for RAON Accelerator	628
	Y. Jung, H. Kim, W.K. Kim IBS, Daejeon, Republic of Korea J. Lee, J. Seo Vitzrotech Co., Ltd., Ansan City, Kyunggi-Do, Republic of Korea
	Residual resistance ratio (RRR) of 300-grade niobium has been analyzed to find optimal welding condition for a superconducting cavity. RRR values were not only measured along the welding directions, but also perpendicular to the welding lines. In this presentation, we will show the RRR analysis as a function of the distance, the welding speed, and the welding pressure.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-TUP106004
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TUP106006	Vertical Test Results on ESS Medium Beta Elliptical Cavity Prototype	631
	E. Cenni CEA/IRFU, Gif-sur-Yvette, France S. Berry, P. Bosland, F. Éozénou, L. Maurice, J. Plouin, C. Servouin CEA/DSM/IRFU, France G. Costanza Lund University, Lund, Sweden C. Darve ESS, Lund, Sweden G. Devanz, X. Hanus, F. Peauger, D. Roudier CEA/DRF/IRFU, Gif-sur-Yvette, France
	The ESS elliptical superconducting Linac consists of two types of 704.42 MHz cavities, medium and high beta, to accelerate the beam from 216 MeV (spoke cavity Linac) up to the final energy at 2 GeV. The last Linac optimization, called Optimus+ [1], has been carried out taking into account the limitations of SRF cavity performance (field emission). The medium and high-beta parts of the Linac are composed of 36 and 84 elliptical cavities, with geometrical beta values of 0.67 and 0.86 respectively. This work presents the latest vertical test results on ESS medium beta elliptical cavity prototypes. We describe the cavity preparation procedure from buffer chemical polishing to vertical test. Finally magnetic probes (Fluxgate) were installed on the cavity to determine magnetic field background during vertical test. The latest vertical test results showed that our cavity design performance are beyond requirements.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-TUP106006
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TUP106007	Results of Intensity Upgrade Phase I for 200 MeV H⁻ Linac at Brookhaven	634
	D. Raparia, B. Briscoe, C. Cullen, T. Lehn, V. LoDestro, A. McNerney, J. Ritter, A. Zelenski BNL, Upton, Long Island, New York, USA
	The 200 MeV H⁻ Linac has been operational for the last 45 years providing beam for the physics and isotope programs. Yearly integrated intensity delivered to BLIP has bean increased by six fold in past decade. Recently we have finish intensity, which resulted 40% more intensity for Brookhaven Linac Isotope Program (BLIP) and reduced losses along the linac and transfer line to BLIP by several folds. We will present detail of the upgrade and the future upgrades plane to further increase the intensity by factor of two
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-TUP106007
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TUP106024	Optimizing Cavity Choice for FRIB Energy Upgrade Plan	637
SPWR033	use link to see paper's listing under its alternate paper code
	S. Shanab, K. Saito, Y. Yamazaki FRIB, East Lansing, USA
	Isotope production yield rate is directly proportional to beam power, especially for heavy ions. Higher beam kinetic energy on target drives more isotope yield. FRIB has an energy upgrade plan up to ≥ 400 MeV/u for Uranium and already prepared a vacant space in the design stage and cryogenic capacity that accommodates for the energy upgrade plan[1]. This upgrade requires an optimized linac design and challenging technology for cavity performance improvement. In this paper, we will approach this issue concerning; maximizing final energy, optimum beta, cavity operating frequency, cryogenic power, fabrication and cost in order to develop a cavity that is suitable for the energy upgrade plan.
	Poster TUP106024 [1.343 MB]
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-TUP106024
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Paper

Title

Page

Magnetic Field Measurements in a Cryomodule with Nearby Warm-Section Quadrupole Magnets of RAON Heavy Ion Accelerator

625

H.J. Cha, J.W. Choi, I. Chun, M. Lee
IBS, Daejeon, Republic of Korea

For the Korean heavy ion accelerator RAON, a normal-conducting quadrupole magnet doublet with an intermediate beam diagnostic devices between two cryomodules is served for collimating the heavy ion beam. Although the fringe field of a magnet at a superconducting cavity position is low enough, differently from a strong superconducting solenoid, it can degrade the acceleration performance in the case of quench of the cavity directly and/or indirectly by contaminating the cryomodule wall and magnetic shields. In this study, we analyze the magnetic measurement results in the cryomodule assembled with the magnet doublet compared to the calculated ones and discuss the future plan.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-TUP106001

Export •

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

TUP106004

Status of RRR Analysis for RAON Accelerator

628

Y. Jung, H. Kim, W.K. Kim
IBS, Daejeon, Republic of Korea
J. Lee, J. Seo
Vitzrotech Co., Ltd., Ansan City, Kyunggi-Do, Republic of Korea

Residual resistance ratio (RRR) of 300-grade niobium has been analyzed to find optimal welding condition for a superconducting cavity. RRR values were not only measured along the welding directions, but also perpendicular to the welding lines. In this presentation, we will show the RRR analysis as a function of the distance, the welding speed, and the welding pressure.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-TUP106004

Export •

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

TUP106006

Vertical Test Results on ESS Medium Beta Elliptical Cavity Prototype

631

E. Cenni
CEA/IRFU, Gif-sur-Yvette, France
S. Berry, P. Bosland, F. Éozénou, L. Maurice, J. Plouin, C. Servouin
CEA/DSM/IRFU, France
G. Costanza
Lund University, Lund, Sweden
C. Darve
ESS, Lund, Sweden
G. Devanz, X. Hanus, F. Peauger, D. Roudier
CEA/DRF/IRFU, Gif-sur-Yvette, France

The ESS elliptical superconducting Linac consists of two types of 704.42 MHz cavities, medium and high beta, to accelerate the beam from 216 MeV (spoke cavity Linac) up to the final energy at 2 GeV. The last Linac optimization, called Optimus+ [1], has been carried out taking into account the limitations of SRF cavity performance (field emission). The medium and high-beta parts of the Linac are composed of 36 and 84 elliptical cavities, with geometrical beta values of 0.67 and 0.86 respectively. This work presents the latest vertical test results on ESS medium beta elliptical cavity prototypes. We describe the cavity preparation procedure from buffer chemical polishing to vertical test. Finally magnetic probes (Fluxgate) were installed on the cavity to determine magnetic field background during vertical test. The latest vertical test results showed that our cavity design performance are beyond requirements.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-TUP106006

Export •

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

TUP106007

Results of Intensity Upgrade Phase I for 200 MeV H⁻ Linac at Brookhaven

634

D. Raparia, B. Briscoe, C. Cullen, T. Lehn, V. LoDestro, A. McNerney, J. Ritter, A. Zelenski
BNL, Upton, Long Island, New York, USA

The 200 MeV H⁻ Linac has been operational for the last 45 years providing beam for the physics and isotope programs. Yearly integrated intensity delivered to BLIP has bean increased by six fold in past decade. Recently we have finish intensity, which resulted 40% more intensity for Brookhaven Linac Isotope Program (BLIP) and reduced losses along the linac and transfer line to BLIP by several folds. We will present detail of the upgrade and the future upgrades plane to further increase the intensity by factor of two

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-TUP106007

Export •

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

TUP106024

Optimizing Cavity Choice for FRIB Energy Upgrade Plan

637

SPWR033

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

S. Shanab, K. Saito, Y. Yamazaki
FRIB, East Lansing, USA

Isotope production yield rate is directly proportional to beam power, especially for heavy ions. Higher beam kinetic energy on target drives more isotope yield. FRIB has an energy upgrade plan up to ≥ 400 MeV/u for Uranium and already prepared a vacant space in the design stage and cryogenic capacity that accommodates for the energy upgrade plan[1]. This upgrade requires an optimized linac design and challenging technology for cavity performance improvement. In this paper, we will approach this issue concerning; maximizing final energy, optimum beta, cavity operating frequency, cryogenic power, fabrication and cost in order to develop a cavity that is suitable for the energy upgrade plan.

Poster TUP106024 [1.343 MB]

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2016-TUP106024

Export •

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