Title :
Mechanical analysis of the Nb3Sn dipole magnet HD1
Author :
Ferracin, Paolo ; Bartlett, Scott E. ; Caspi, Shlomo ; Dietderich, Daniel R. ; Gourlay, Steve A. ; Hannaford, Charles R. ; Hafalia, Aurelio R. ; Lietzke, Alan F. ; Mattafirri, Sara ; Sabbi, GianLuca
Author_Institution :
Lawrence Berkeley Nat. Lab., CA, USA
fDate :
6/1/2005 12:00:00 AM
Abstract :
The Superconducting Magnet Group at Lawrence Berkeley National Laboratory (LBNL) has recently fabricated and tested HD1, a Nb3Sn dipole magnet. The magnet reached a 16 T field, and exhibited training quenches in the end regions and in the straight section. After the test, HD1 was disassembled and inspected, and a detailed 3D finite element mechanical analysis was done to investigate for possible quench triggers. The study led to minor modifications to mechanical structure and assembly procedure, which were verified in a second test (HD1b). This paper presents the results of the mechanical analysis, including strain gauge measurements and coil visual inspection. The adjustments implemented in the magnet structure are reported and their effect on magnet training discussed.
Keywords :
accelerator magnets; finite element analysis; mechanical testing; niobium alloys; strain gauges; superconducting magnets; tin alloys; 16 T; 3D finite element mechanical analysis; HD1; Lawrence Berkeley National Laboratory; Nb3Sn; Superconducting Magnet Group; assembly procedure; coil visual inspection; dipole magnet; mechanical structure; quench triggers; strain gauge measurements; Assembly; Finite element methods; Laboratories; Magnetic analysis; Magnetic field induced strain; Niobium; Strain measurement; Superconducting magnets; Testing; Tin; strain gauges; superconducting magnets;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.849508
