LINAC2018 - Classification: Technology / Cryomodules and cryogenics

Paper	Title	Page
TU1A04	FRIB Cavities and Cryomodule Production
	C. Compton FRIB, East Lansing, Michigan, USA
	FRIB is producing 49 cryomodules (CMs) with six types (four types of accelerating CMs and two types of matching CMs). Four types of SRF cavities are installed; β = 0.041 Quarter Wave Resonator (QWR), β = 0.085 QWR, β = 0.29 Half Wave Resonator (HWR), and β = 0.53 HWR. The superconducting focusing solenoids and diagnostics are installed in the CMs. By the end of October, 2017, 13 CMs were integrated tested and have been placed at the FRIB tunnel. In addition, 3 CMs were assembled, and 7 cold masses were completed. The remaining 26 CMs production is on track. Challenges overcome during the course of CMs development and production were presented with the updated status.
	Slides TU1A04 [13.283 MB]
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

TUPO019	SPIRAL2 Cryogenic System Thermodynamic Behavior Prediction Through Dynamic Modeling	366
	A.V. Vassal, P.-E. Bernaudin, A. Ghribi GANIL, Caen, France P.-E. Bernaudin CEA/DSM/IRFU, France P. Bonnay, F. Bonne CEA/INAC, Grenoble Cedex 9, France F. Millet CEA, Grenoble, France
	SPIRAL 2 (Caen, France) is a state of the art superconducting linear accelerator composed of 26 quarter wave accelerating cavities. Each cavity is plunged in a liquid helium bath at 4.4 K itself surrounded by a thermal shield at 70 K. In this paper, a dynamic model of the cryogenic systemof the LINAC is proposed. Thismodel simulates the dynamic behaviour of the 19 cryomodules and their respective valves box connected through the cryodistribution. Model accuracy is evaluated through a comparison between simulation and experimental data. Using the model we should be able to predict the behaviour of the cryogenic system for different beam operating conditions of the accelerator. The model also highlights the link between the cryogenic system and the cavity RF losses through a dynamic estimator of those RF losses in the cavity walls. The latter could be used as a rough estimator of the quality factor of a cavity.
DOI •	reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TUPO019
About •	paper received ※ 13 September 2018 paper accepted ※ 20 September 2018 issue date ※ 18 January 2019
Export •	reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)

Paper

Title

Page

TU1A04

FRIB Cavities and Cryomodule Production

C. Compton
FRIB, East Lansing, Michigan, USA

FRIB is producing 49 cryomodules (CMs) with six types (four types of accelerating CMs and two types of matching CMs). Four types of SRF cavities are installed; β = 0.041 Quarter Wave Resonator (QWR), β = 0.085 QWR, β = 0.29 Half Wave Resonator (HWR), and β = 0.53 HWR. The superconducting focusing solenoids and diagnostics are installed in the CMs. By the end of October, 2017, 13 CMs were integrated tested and have been placed at the FRIB tunnel. In addition, 3 CMs were assembled, and 7 cold masses were completed. The remaining 26 CMs production is on track. Challenges overcome during the course of CMs development and production were presented with the updated status.

Slides TU1A04 [13.283 MB]

Export •

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

TUPO019

SPIRAL2 Cryogenic System Thermodynamic Behavior Prediction Through Dynamic Modeling

366

A.V. Vassal, P.-E. Bernaudin, A. Ghribi
GANIL, Caen, France
P.-E. Bernaudin
CEA/DSM/IRFU, France
P. Bonnay, F. Bonne
CEA/INAC, Grenoble Cedex 9, France
F. Millet
CEA, Grenoble, France

SPIRAL 2 (Caen, France) is a state of the art superconducting linear accelerator composed of 26 quarter wave accelerating cavities. Each cavity is plunged in a liquid helium bath at 4.4 K itself surrounded by a thermal shield at 70 K. In this paper, a dynamic model of the cryogenic systemof the LINAC is proposed. Thismodel simulates the dynamic behaviour of the 19 cryomodules and their respective valves box connected through the cryodistribution. Model accuracy is evaluated through a comparison between simulation and experimental data. Using the model we should be able to predict the behaviour of the cryogenic system for different beam operating conditions of the accelerator. The model also highlights the link between the cryogenic system and the cavity RF losses through a dynamic estimator of those RF losses in the cavity walls. The latter could be used as a rough estimator of the quality factor of a cavity.

DOI •

reference for this paper ※ https://doi.org/10.18429/JACoW-LINAC2018-TUPO019

About •

paper received ※ 13 September 2018 paper accepted ※ 20 September 2018 issue date ※ 18 January 2019

Export •

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