skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Magnetic field quality analysis using ANSYS

Abstract

The design of superconducting magnets for particles accelerators requires a high quality of the magnetic field. This paper presents an ANSYS 4.4A Post 1 macro that computes the field quality performing a Fourier analysis of the magnetic field. The results show that the ANSYS solution converges toward the analytical solution and that the error on the multipole coefficients depends linearly on the square of the mesh size. This shows the good accuracy of ANSYS in computing the multipole coefficients. 2 refs., 16 figs., 4 tabs.

Authors:
;
Publication Date:
Research Org.:
Lawrence Berkeley Lab., CA (USA)
Sponsoring Org.:
USDOE; USDOE, Washington, DC (USA)
OSTI Identifier:
5936229
Report Number(s):
LBL-30455; CONF-9105159-2; LBID-1635; SC-MAG-302
ON: DE91011881
DOE Contract Number:
AC03-76SF00098
Resource Type:
Conference
Resource Relation:
Conference: 5. ANSYS international conference and exhibition, Pittsburgh, PA (USA), 20-24 May 1991
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; MAGNETIC FIELDS; FOURIER ANALYSIS; SUPERCONDUCTING MAGNETS; DESIGN; A CODES; BOUNDARY CONDITIONS; MAGNETIC DIPOLES; MAGNETIC FLUX; NUMERICAL SOLUTION; QUADRUPOLES; QUALITY CONTROL; COMPUTER CODES; CONTROL; DIPOLES; ELECTRICAL EQUIPMENT; ELECTROMAGNETS; EQUIPMENT; MAGNETS; MULTIPOLES; SUPERCONDUCTING DEVICES; 430200* - Particle Accelerators- Beam Dynamics, Field Calculations, & Ion Optics; 430300 - Particle Accelerators- Auxiliaries & Components

Citation Formats

Dell'Orco, D., and Chen, Y. Magnetic field quality analysis using ANSYS. United States: N. p., 1991. Web.
Dell'Orco, D., & Chen, Y. Magnetic field quality analysis using ANSYS. United States.
Dell'Orco, D., and Chen, Y. Fri . "Magnetic field quality analysis using ANSYS". United States. doi:. https://www.osti.gov/servlets/purl/5936229.
@article{osti_5936229,
title = {Magnetic field quality analysis using ANSYS},
author = {Dell'Orco, D. and Chen, Y.},
abstractNote = {The design of superconducting magnets for particles accelerators requires a high quality of the magnetic field. This paper presents an ANSYS 4.4A Post 1 macro that computes the field quality performing a Fourier analysis of the magnetic field. The results show that the ANSYS solution converges toward the analytical solution and that the error on the multipole coefficients depends linearly on the square of the mesh size. This shows the good accuracy of ANSYS in computing the multipole coefficients. 2 refs., 16 figs., 4 tabs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Mar 01 00:00:00 EST 1991},
month = {Fri Mar 01 00:00:00 EST 1991}
}

Conference:
Other availability
Please see Document Availability for additional information on obtaining the full-text document. Library patrons may search WorldCat to identify libraries that hold this conference proceeding.

Save / Share:
  • The method of combining the use of ANSYS SOLID 46 finite element and the sub-element/deficient approximation function (SEDAF) analysis is developed and demonstrated on the benchmark problem of Pagano. The algorithm incorporates a primary displacement calculation using ANSYS and the successive stress calculation using 3-D SEDAF analysis. A special mathematical procedure aimed to convert the global displacement output of the commercial finite element code into the local displacement input of the SEDAF analysis is presented. The results show a considerably higher accuracy provided by this combination compared to the original ANSYS results when calculating both the in-plane and transverse stresses,more » especially for their values at the interfaces. After some generalization, the presented ANSYS/SEDAF algorithm seems to be promising for obtaining a sufficiently accurate 3-D stress distributions in any structural analysis problem allowing for the application of ANSYS code.« less
  • A quench program using ANSYS is developed for the high field collider magnet for three-dimensional analysis. Its computational procedure is explained. The quench program is applied to a one meter Nb{sub 3}Sn high field model magnet, which is epoxy impregnated. The quench simulation program is used to estimate the temperature and mechanical stress inside the coil as well as over the whole magnet. It is concluded that for the one meter magnet with the presented cross section and configuration, the thermal effects due to the quench is tolerable. But we need much more quench study and improvements in the designmore » for longer magnets.« less
  • The design of beam position monitor (BPM) stripline detectors has been enhanced by using the finite element code ANSYS[sup TM]. Available from Swanson Engineering, ANSYS[sup TM] was developed to solve Poisson's equation in stress and thermal analysis applications. The code is readily adaptable to solving electrostatic problems. The designs of several beam detectors were iterated by calculating electrode capacitances and characteristic impedances to better than 1% accuracy.
  • Ratcheting has been shown to be a contributing cause of failure in several seismic experiments on piping components and systems. Most commercial finite element codes have been unable to simulate the ratcheting in those tests accurately. The reason for this can be traced to inadequate plasticity constitutive models in the analysis codes. The authors have incorporated an improved cyclic plasticity model, based on an Armstrong-Frederick kinematic hardening rule in conjunction with the Drucker-Palgen plastic modulus equation, into an ANSYS user subroutine. This modified analysis code has been able to simulate quite accurately the ratcheting behavior of a tube subjected tomore » a constant internal pressure and axially strain controlled cycling. This paper describes simulations obtained form this modified ANSYS code for two additional tests: (1) a tube subjected to constant axial stress and prescribed torsional cycling, and (2) a straight pipe subjected to constant internal pressure and quasi-static cyclic bending. The analysis results from the modified ANSYS code are compared to the experimental data, as well as results from ABAQUS and the original ANSYS code. The resulting correlation shows a significant improvement over the original ANSYS and the ABAQUS codes.« less