Design Optimization of the New D1 Dipole for HL-LHC Upgrade

Author

Qingjin Xu ; Nakamoto, Takamichi ; Iio, Masami ; Ogitsu, T. ; Sasaki, Kazuhiko ; Yamamoto, Akiyasu ; Todesco, E. ; Auchmann, B.

Author_Institution

High Energy Accel. Res. Organ. (KEK), Tsukuba, Japan

Volume

24

Issue

3

fYear

2014

fDate

Jun-14

Firstpage

1

Lastpage

4

Abstract

The High-Luminosity Large Hadron Collider upgrade (LHC) project aims to increase the peak luminosity of the LHC to 5 ×10³⁴ cm ^{- 2}s ^{- 1}, and a total integrated luminosity of 3000 fb ^{- 1} from 2020 to 2030 by upgrading the low-beta insertion system for the ATLAS and CMS experiments. The aperture of the insertion magnets including the focusing/defocusing quadrupoles and separation dipoles will be doubled to achieve a smaller β*. This paper presents the latest design updates of the separation dipole D1 magnet, including the study of the different cable types to vary the main field; the modifications of the iron shape for the new design options to minimize the iron saturation effect on field quality; and the optimization of the coil ends to reduce the peak field and higher order harmonic field integrals in the ends.

Keywords

accelerator magnets; optimisation; superconducting cables; superconducting coils; superconducting magnets; ATLAS experiments; CMS experiments; HL-LHC upgrade project; cable types; design optimization; dipole D1 magnet; focusing-defocusing quadrupoles; high order harmonic field integrals; high-luminosity large hadron collider upgrade project; insertion magnets; iron saturation effect; iron shape modifications; low-beta insertion system; total integrated luminosity; Apertures; Coils; Iron; Large Hadron Collider; Saturation magnetization; Superconducting cables; Superconducting magnets; Coil end design; cos-theta type coil; large aperture; superconducting accelerator magnets;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/TASC.2013.2280812

Filename

6589199