xmpl3d02, 2nd 'example' data file for CPO3D

A practical cylindrical deflection analyzer, 127 degrees.


The two cylindrical sectors have radii of 0.75cm and 1.25cm, and are of depth 2cm. Six strips are used at the entrance and exit to correct for the end effects


The number of segments used in the present example is small enough for the example to be run with the ‘demo’ version of CPO3D. Higher accuracy could of course be obtained with more segments, using the standard or full versions of CPO3D.

This simulation is analogous to that in the first 'example', so please consult the notes at the end of file xmpl3d01.dat for further information.


The following data were obtained when the memory and speed of PC's was much more limited than at present, so the available number of segments was small and the requested inaccuracies were fairly high to give a quick demonstration.


The cylinders are of depth 2.0, the middle 0.5 of which is more finely divided than the rest. The fringe fields are corrected by 6 strips at the entrance and exit (of length 0.5). The top and bottom are closed off by annular plates at the mean potential.


The 'clipping' technique is used to confine the cylinders and annular plates to the 127 degree angle range of the analyzer.


A 'test plane' is put at the exit plane of the analyzer. At this plane the final distance of the median ray from the centre of curvature is 1.0028, an error of 0.3% (comparable with the requested ray inaccuracy of 0.1%, and also affected by the imperfect fringing fields). The final energy is 0.99807, also giving an error of 0.2% The other two rays start with angles of +/- 0.1 radians.

The computing time for the boundary charges is 6 sec, using a 66MHz 486 PC, and for each ray is 4 sec.