Effective stress of the SSC 80-K synchrotron radiation liner in a quenching dipole magnet
This paper describes the effective stress on a proposed SSC beam tube. The new issue for the Collider compared to earlier accelerators is the combination of synchrotron radiation with the 4.2-K bore tube of the superconducting magnets. One design option is to use a liner within a bore tube to remove the radiated power and the accompanying photodesorbed gas that impair the beam tube vacuum. Design of the SSC 80-K synchrotron radiation liner requires vacuum luminosity lifetime = 150 hours and liner electrical conductivity, [sigma]*t > 2E5 [Omega]-1. The bimetallic liner tube is subjected to cool down and eddy current loads. The liner tube is a two-shell laminate with Nitronic-40 steel for strength and a copper inner layer for low impedance to the image currents induced by the circulating protons. High electrical conductivity of the copper layer is essential for minimizing the power losses. Perforated holes are used to remove the photodesorbed gases for vacuum maintenance. The tube is cooled by 80-K lines. Structural design of the liner is not covered by the ASME code. The life of the liner involves structural integrity and keeping the copper laminate within yield stress limits to maintain the high surface finish for minimizing the power losses. The copper layer stress governs the structural design of the liner. The liner tube analysis is a three-dimensional non-linear stress problem. Thermal transient cool down stress is not considered in this analysis because of the floating support design of the liner. This analysis will address the axial thermal stress, non-axisymmetrical eddy current loads, dynamic and non-linear material effect on the liner that have not been considered in publications on beam tube structural analyses.
- Research Organization:
- Superconducting Super Collider Lab., Dallas, TX (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC35-89ER40486
- OSTI ID:
- 6537145
- Report Number(s):
- SSCL-Preprint-376; CONF-930511-11; ON: DE93014071
- Resource Relation:
- Conference: International particle accelerator conference, Washington, DC (United States), 17-20 May 1993
- Country of Publication:
- United States
- Language:
- English
Similar Records
Eddy current and quench loads response for the SSC 4-K liner and bore tube during collider magnet quench
Eddy current and quench loads and stress of SSC collider 4-K liner and the bore tube during magnet quench
Related Subjects
LINERS
STRESS ANALYSIS
SUPERCONDUCTING SUPER COLLIDER
EDDY CURRENTS
FINITE ELEMENT METHOD
MAGNETIC DIPOLES
QUENCHING
TUBES
CALCULATION METHODS
CURRENTS
DIPOLES
ELECTRIC CURRENTS
MULTIPOLES
NUMERICAL SOLUTION
STORAGE RINGS
430303* - Particle Accelerators- Experimental Facilities & Equipment