SUBROUTINE KCCVTW(TRACKC, MASS, TRACKW)
 
C  >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
C  Takes a helix expressed in C form and converts it into W form
C
C  TRACKC   real array (read)
C           C track parameters (cu, fi0, da, ct, z0, cos(fi0), sin(fi0), P, Q)
C
C  MASS     real variable (read)
C           Mass of particle (used in energy calculation)
C
C *TRACKW   real array (write)
C           W track parameters (Px, Py, Pz, E, x, y, z, Pt, p, Q)
C  >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>