3.3.8 sextupole

sextupole defines a sextupole. Attributes:

• l - length [m] (default 0)
• k2 - normal sextupole coefficient k2 = 1/(B \rho) d^2 B_y / dx^2 [m^-3]
• ks2 - skew sextupole coefficient ks2 = 1/(B \rho) d^2 B_y / dx^2 [m^-3] where (x,y) is now a coordinate system rotated by 30 degrees around s with respect to the normal one.(default 0).
• tilt - roll angle [rad] about the longitudinal axis, clockwise.
• aper - aperture [m] (default same as beampipe radius)
• outR - external radius [m] of magnet (default set to aper+22cm)
• material - the magnet material (default set to “Iron”)

Example :

     
     sf : sextupole, l=0.5*m , k2 = 0.5 , tilt = 0.01;