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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Foss, Martyn H. |
| Copyright Year | 1963 |
| Abstract | The high-energy microtrons studied at Argonne National Laboratory (ANL) require complicated magnetic field shapes. A three-dimensional infinite-permeability magnetic field program was written to show that poles and coils can be devised to produce these fields. The program is in Hewlett-Packard 9845B BASIC, which limits the active mesh to about 30 000 points. In some problems the number of useful points can be greatly increased by placing virtual points one plane beyond the active mesh. The regular cubic mesh is described by three arrays. One is a scalar potential array, H, which is derived from ampere-turns by using current cuts. Another is an information array, I, and the third is a list, L, containing other data. This data structure is similar to the Carnegie Magnet - Program. An element from I usually contains a bit string with directions for calculating the corresponding H. However, if more data are required, then the word from I is interpreted as the address in L where the required data are stored. Parts of L can be reused when two or more points require the same data. The organization of the data is shown in Fig. 1. This organization minimizes memory requirements and makes the calculation fast for most points. The program has four parts: (1) prepare the problem description file, (2) load the starting mesh, (3) relax the mesh, and (4) output results. Preliminary results indicate that the magnet edge can be quite "hard" and suggest that the required field shapes can be produced. |
| Sponsorship | IEEE Nuclear and Plasma Sciences Society Computer Applications in Nuclear and Plasma Sciences (CANPS) Lawrence Berkeley Lab. Lawrence Livermore Nat. Lab. APS College of William and Mary Continuous Electron Beam Accelerator Facility NASA Defence Nuclear Agency Sandia National Laboratories Jet Propulsion Laboratory Brookhaven Nat. Lab. Lawrence Livermore Nat. Lab IEEE/NPPS Radiat. Effects Committee Defence Nuclear Agency/DoD Sandia National Laboratories/DOE Jet Propulsion Laboratory/NASA Phillips Lab./DoD |
| Starting Page | 2856 |
| Ending Page | 2858 |
| Page Count | 3 |
| File Size | 521633 |
| File Format | |
| ISSN | 00189499 |
| Volume Number | 30 |
| Issue Number | 4 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1983-08-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Laboratories Magnetic fields Shape Coils Data structures Perpendicular magnetic recording Boundary conditions Mesh generation Hydrogen |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nuclear and High Energy Physics Electrical and Electronic Engineering Nuclear Energy and Engineering |
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