22–27 Sept 2019
Hyatt Regency Hotel Vancouver
Canada/Pacific timezone

Wed-Mo-Po3.11-02 [89]: Quench Analysis of an LTS Quadrupole Triplet Magnet System for the IBS RAON Inflight-Fragment Separator

25 Sept 2019, 09:30
1h 45m
Level 3 Posters

Level 3 Posters

Speaker

Dr Wooseung Lee (Massachusetts Institute of Technology, Francis Bitter Magnet Laboratory / Plasma Science and Fusion Center)

Description

In this paper we present quench analysis results of a Low-Temperature Superconducting (LTS) quadrupole triplet magnet system, a part of the In-flight Fragment (IF) separator of a heavy ion linear accelerator complex, named RAON, currently being constructed by the Institute of Basic Science (IBS). This magnet system is composed of three quadrupole magnets: a triplet, surrounded by iron yokes and embedding hexapole/octupole LTS coils for field correction. The magnet will be operated at 4.2 K in liquid helium. For reliable and safe operation of this complex superconducting system, quench and protection analysis with possible failure scenarios must be performed. In this paper, we first discuss probable quench scenarios and then present results of the quench propagation analysis on: 1) coil currents and voltages by multi-coil model circuit analysis; and 2) simulated temperature distribution inside each coil. Our quench analysis results show that the maximum voltage and temperature in each coil are below safety limits, 2000 V and 150 K, respectively, and confirm that this quadruple triplet magnet system is self-protecting.

Acknowledgement: This work was supported by the Rare Isotope Science Project of Institute for Basic Science funded by Ministry of Science and ICT and NRF of Korea (2013M7A1A1075764)

Primary authors

Dr Wooseung Lee (Massachusetts Institute of Technology, Francis Bitter Magnet Laboratory / Plasma Science and Fusion Center) Dr Dongkeun Park (Francis Bitter Magnet Laboratory / Plasma Science and Fusion Center, Massachusetts Institute of Technology) Yukikazu Iwasa (Francis Bitter Magnet Laboratory / Plasma Science and Fusion Center, Massachusetts Institute of Technology) Dr Jiho Lee (Rare Isotope Science Project, Institute for Basic Science (IBS)) Dr Do Gyun Kim (Rare Isotope Science Project, Institute for Basic Science (IBS))

Presentation materials