The CESR-c wiggler was modified for easy insertion into the TESLA TDR damping ring. A comparison was performed between a linear wiggler model, an ideal nonlinear wiggler model, the TESLA TDR wiggler full nonlinear model, and the modified CESR-c wiggler full nonlinear model. See PAC05 paper by Urban and Dugan.

The physical description of the different wiggler models is given below including a table of magnetic field values and a fit to the mangetic field in the wiggler. The fit is performed using the procedure developed at Cornell for an iterative fit (parameters in fit are: kx, kz, and C) to the Halbach approximation. See PAC03 paper by Sagan, Crittenden, Rubin, and Forest.

This wiggler model will be used in damping ring comparison studies I (and others) will be carrying out for Snowmass 2005. See my Damping Ring Evaluations Homepage

• TESLA TDR Wiggler: 9 Periods
  • Field Map
  • Bmad Fit Result
• Modified CESR-c Wiggler: 9 Periods
  • Field Map, x = 1cm, dx = 0.5mm, y = 0.6cm, dy = 0.5mm, z = 4.8m, dz = 4mm, x trajectory offset = 46microns
  • Bmad Fit Result
  • Field Map, x = 4.8cm, dx = 4mm, y = 2.6cm, dy = 2mm, z = 4.8m, dz = 2mm, x trajectory offset = 46microns
  • Bmad Fit Result
• Modified CESR-c Wiggler: 5 Periods
  • Field Map from Opera, x = 1cm, dx = 0.5mm, y = 0.6cm, dy = 0.5mm, z = 3.2m, dz = 4mm, x trajectory offset = 0.7microns
  • Bmad Fit Result
  • Field Map from Radia, x = 4.8cm, dx = 4mm, y = 2.6cm, dy = 2mm, z = 1.6m, dz = 2mm
  • High Resolution Field Map from Radia, x = 4.8cm, dx = 1mm, y = 2.6cm, dy = 1mm, z = 3.2m, dz = 2mm

Created June 6, 2005
Modified August 31, 2005