rutherford.winding Namespace Reference

Classes
class	WindingError
class	Tape
class	Layer
class	Winding

Detailed Description

Winding schedule for the tape-wrapped flat core: layer cross-sections,
lay angles, tape/gap partitions of the perimeter, discretization counts
and the periodic closure rule. Pure parameters, no geometry entities.

Conventions:
- lengths in mm, the layer gap in um, the lay angle in degrees
- the cable axis is z; the lay angle theta is measured from it, so a
  tape advances ds/dz = tan theta along the perimeter and one turn takes
  the pitch L = P / tan theta in z
- the pitch is common to all layers. Layer l sits on a stadium with the
  same flat length and the edge radius r + l * gap, so its perimeter and
  hence its lay angle differ: tan theta_l = P_l / L. layAngle is the
  layer-0 value
- odd layers are counter-wound (sense sigma = -1 relative to layer 0)
- tape k of a layer is centered at s = sigma * (k * P / n + z * tan theta)
  with s = 0 at the top-face center
- the tape width wt is measured across the tape; at fixed z the band
  spans wt / cos theta of perimeter and wt / sin theta of z