Structure Design and Analysis of Canted-Cosine-Theta (CCT) Superconducting Quadrupole Magnet

Luncai Zhou,Lizhen Ma,Liang Yu,Yuquan Chen,Wei Wu,Rongzhen Zhao,Selda Oterkus

doi:10.1155/2021/8895136

Abstract

A superconducting quadrupole magnet based on the Canted-Cosine-Theta (CCT) type coil with a gradient field of 40 T/m and a bore diameter of 60 mm has been designed for the preresearch of two projects of high intensity accelerator facility (HIAF) and accelerator driven subcritical system (ADS). The magnet is comprised of two-layer coils embedded in the formers and the end plates for locating. The coil formers made of aluminum alloy are machined with grooves according to the drive equations of CCT for placing the wires. The existence of ribs between two adjacent wires can avoid accumulation of the electromagnetic force. It is important to take the mechanical design for the complex structure to avoid tensile stresses on the conductor and confine the stresses within a reasonable value. The stress analysis for the quadrupole magnet has been carried out considering the thermal shrinking due to cool down as well as the electromagnetic force on the coil. This paper reports the detailed stress analysis for the CCT quadrupole magnet structure, discusses the calculating results, and gives a reasonable mechanical design.

Highlights

High intensity accelerator facility (HIAF) and accelerator driven subcritical system (ADS) are under construction at the Institute of Modern Physics in China [1, 2]
E thermal contraction from room temperature to 4.2 K and Lorentz force is taken as loads onto the model for the structure analysis. e winding tension is not considered
One of the advantages of Canted-Cosine- eta (CCT) type magnet is that the electromagnetic force can be separated by ribs in the axial direction and prevented from accumulating

Summary

Research Article

Structure Design and Analysis of Canted-Cosine-Theta (CCT) Superconducting Quadrupole Magnet. A superconducting quadrupole magnet based on the Canted-Cosine- eta (CCT) type coil with a gradient field of 40 T/m and a bore diameter of 60 mm has been designed for the preresearch of two projects of high intensity accelerator facility (HIAF) and accelerator driven subcritical system (ADS). It is important to take the mechanical design for the complex structure to avoid tensile stresses on the conductor and confine the stresses within a reasonable value. E stress analysis for the quadrupole magnet has been carried out considering the thermal shrinking due to cool down as well as the electromagnetic force on the coil. Is paper reports the detailed stress analysis for the CCT quadrupole magnet structure, discusses the calculating results, and gives a reasonable mechanical design It is important to take the mechanical design for the complex structure to avoid tensile stresses on the conductor and confine the stresses within a reasonable value. e stress analysis for the quadrupole magnet has been carried out considering the thermal shrinking due to cool down as well as the electromagnetic force on the coil. is paper reports the detailed stress analysis for the CCT quadrupole magnet structure, discusses the calculating results, and gives a reasonable mechanical design

Introduction

Jz Jx Jy

Results and Discussion

Interplated value

Inner coil Outer coil