ccaw Namespace Reference

Functions
double	sqr (double a)
double	area (double R)
double	gaugeDiam (int gauge)
double	gaugeSurface (int gauge)
double	ccawDensity ()
	Units: kg/m3.
double	conductorWeight (int gauge)
	Weight per unit of length for the CCAW conductor, in kg/meter.
double	insulatorWeight (int gauge, double thick=90.e-6, double dens=1.27e3)
	Weight per unit of length for the insulator.
double	ccawResistivity (int gauge)
int	closestResistivityCcawGauge (double res)

Function Documentation

area()

double ccaw::area ( double R )

inline

Definition at line 14 of file CcawUtils.h.

{return M_PI*R*R;}

ccawDensity()

double ccaw::ccawDensity ( )

inline

Units: kg/m3.

Definition at line 21 of file CcawUtils.h.

                              {
    double dens_cu = 8.94e3;  // kg/m3
    double dens_al = 2.70e3;  // kg/m3
    return 0.1*dens_cu + 0.9*dens_al;
  } 

ccawResistivity()

double ccaw::ccawResistivity ( int gauge )

inline

Definition at line 38 of file CcawUtils.h.

                                           { 
    double res_cu = 16.78e-9; // Ohm*m
    double res_al = 28.2e-9;  // Ohm*m
 
    double s = gaugeSurface( gauge);
    double R_al = res_al/(s*0.9);
    double R_cu = res_cu/(s*0.1);
 
    double invR = 1/R_al + 1/R_cu;
    return 1./invR;
  }

closestResistivityCcawGauge()

int ccaw::closestResistivityCcawGauge ( double res )

inline

Definition at line 50 of file CcawUtils.h.

  {
    // start arbitrarily with gauge 22
    int gauge = 22;
    double oldres = ccawResistivity(gauge);
    double newres;
    if (res > oldres) { 
      do {
    newres = ccawResistivity(++gauge);
    if (newres > res) break;
    oldres = newres;
      } while (gauge < 37);
      if ( fabs( 1-newres/res) < fabs( 1-res/oldres)) return gauge;
      else return --gauge;  // old gauge was closer
    }
    else {
      do {
    newres = ccawResistivity(--gauge);
    if (newres < res) break;
    oldres = newres;
      } while (gauge > 14);
      if ( fabs( 1-newres/res) < fabs( 1-res/oldres)) return gauge;
      else return ++gauge;  // old gauge was closer
    }
  }

conductorWeight()

double ccaw::conductorWeight ( int gauge )

inline

Weight per unit of length for the CCAW conductor, in kg/meter.

Definition at line 28 of file CcawUtils.h.

{ return gaugeSurface(gauge) * ccawDensity();}

gaugeDiam()

double ccaw::gaugeDiam ( int gauge )

inline

Definition at line 16 of file CcawUtils.h.

{ return 0.127e-3*pow(92, double(36-gauge)/39.0);}

gaugeSurface()

double ccaw::gaugeSurface ( int gauge )

inline

Definition at line 18 of file CcawUtils.h.

{ return M_PI*sqr(gaugeDiam(gauge))/4.;}

insulatorWeight()

double ccaw::insulatorWeight ( int gauge, double thick = 90.e-6, double dens = 1.27e3 )

inline

Weight per unit of length for the insulator.

The defaults correspond to Quadruple ML insulation (check density!) Units are meters for thickness, kg/m3 for density, and kg/m for the result

Definition at line 33 of file CcawUtils.h.

                                                                                     {
    double radius = gaugeDiam(gauge) / 2.;
    return (area( radius+thick) - area( radius)) * dens;
  }

sqr()

double ccaw::sqr ( double a )

inline

Definition at line 12 of file CcawUtils.h.

{return a*a;}