magfieldparam::BFit Class Reference

#include <BFit.h>

Public Member Functions
	BFit ()
void	GetField (double r, double z, double phi, double &Br, double &Bz, double &Bphi) const
void	SetField (double B)
	~BFit ()

Private Attributes
rz_poly *	Br_base
rz_poly *	Bz_base
double	C [16]
double	dZ

Static Private Attributes
static const double	C_0 [16]
static const double	C_2 [16]
static const double	C_4 [16]
static const double	dZ_0 = -2.62328760352034e-2
static const double	dZ_2 = 5.94363870284212e-4

Detailed Description

2D parametrization of MTCC data

Author

V. Maroussov

Definition at line 15 of file BFit.h.

Constructor & Destructor Documentation

BFit()

BFit::BFit

(

)

Definition at line 137 of file BFit.cc.

           {
  dZ = 0.;
  memset(C, 0, 16 * sizeof(double));
  rz_poly *P_base = new rz_poly(16);  //Potential basis
 
  Bz_base = new rz_poly(P_base->Diff(1));  //Bz basis
  Bz_base->SetOFF(1);                      //Switch off linear term
 
  Br_base = new rz_poly(P_base->Diff(0));  //Br basis is shifted, so
  Br_base->SetOFF(0);                      //"0" term is ignored
 
  delete P_base;
}

References gen::C, magfieldparam::rz_poly::Diff(), and magfieldparam::rz_poly::SetOFF().

~BFit()

magfieldparam::BFit::~BFit ( )

inline

Definition at line 37 of file BFit.h.

            {
      delete Bz_base;
      delete Br_base;
    };

References Br_base, and Bz_base.

Member Function Documentation

GetField()

void BFit::GetField	(	double	r,
		double	z,
		double	phi,
		double &	Br,
		double &	Bz,
		double &	Bphi
	)		const

Definition at line 190 of file BFit.cc.

                                                                                              {
  //Get field components in the point (r,z,phi). Always return Bphi=0.
  //Parameters phi and Bphi introduced in order to keep interface
  //compatible with future trully 3D version
  //
  double zc = z + dZ;
 
  Bz = Bz_base->GetSVal(r, zc, C);
  Br = Br_base->GetSVal(r, zc, C + 1);
  Bphi = 0.;
}

References gen::C, and alignCSCRings::r.

Referenced by PolyFit2DParametrizedMagneticField::inTeslaUnchecked().

SetField()

void BFit::SetField

(

double

B

)

Definition at line 152 of file BFit.cc.

                            {
  //Set nominal field [Tesla]
  //
  unsigned int jj;
 
#ifdef BFit_PW
  unsigned int kk = 1;
  double w_0, w_1;
  if (B <= B_nom[0]) {
    dZ = Z_nom[0];
    for (jj = 0; jj < 16; ++jj) {
      C[jj] = B * C_nom[0][jj];
    }
  } else if (B >= B_nom[3]) {
    dZ = Z_nom[3];
    for (jj = 0; jj < 16; ++jj) {
      C[jj] = B * C_nom[3][jj];
    }
  } else {
    while (B_nom[kk] < B)
      ++kk;
    w_1 = (B - B_nom[kk - 1]) / (B_nom[kk] - B_nom[kk - 1]);
    w_0 = 1.0 - w_1;
    dZ = Z_nom[kk - 1] * w_0 + Z_nom[kk] * w_1;
    for (jj = 0; jj < 16; ++jj) {
      C[jj] = B * (C_nom[kk - 1][jj] * w_0 + C_nom[kk][jj] * w_1);
    }
  }
#else
  double B2 = B * B;
  dZ = dZ_0 + dZ_2 * B2;
  for (jj = 0; jj < 16; ++jj) {
    C[jj] = B * ((C_4[jj] * B2 + C_2[jj]) * B2 + C_0[jj]);
  }
#endif
}

References TtFullHadDaughter::B, gen::C, findQualityFiles::jj, and GetRecoTauVFromDQM_MC_cff::kk.

Referenced by PolyFit2DParametrizedMagneticField::PolyFit2DParametrizedMagneticField().

Member Data Documentation

Br_base

rz_poly* magfieldparam::BFit::Br_base

private

Definition at line 33 of file BFit.h.

Referenced by ~BFit().

Bz_base

rz_poly* magfieldparam::BFit::Bz_base

private

Definition at line 32 of file BFit.h.

Referenced by ~BFit().

C

double magfieldparam::BFit::C[16]

private

Definition at line 30 of file BFit.h.

C_0

const double BFit::C_0

staticprivate

Initial value:

= {1.0,
                              -2.52864632909442e-3,
                              8.76365790071351e-6,
                              9.19077286315044e-5,
                              -2.49284256023752e-6,
                              -1.80143891826520e-5,
                              2.29295162454016e-7,
                              1.96139195659245e-6,
                              -3.47342625923464e-9,
                              -1.32147627969588e-7,
                              -1.50735830442900e-9,
                              5.17724172101696e-9,
                              1.54539960459831e-10,
                              -9.30914368388717e-11,
                              -5.20466591966397e-12,
                              0.0}

Definition at line 25 of file BFit.h.

C_2

const double BFit::C_2

staticprivate

Initial value:

= {0.0,
                              -2.96314154618866e-4,
                              -6.04246295125223e-7,
                              -2.22393436573694e-6,
                              2.84133631738674e-9,
                              -2.07090716476209e-7,
                              2.55850963123821e-8,
                              -1.06689136150163e-8,
                              -5.48842256680751e-9,
                              1.78987539969165e-9,
                              5.57809366992069e-10,
                              -8.25055601520632e-11,
                              -3.18509299957904e-11,
                              1.11714602344300e-12,
                              7.90102331886296e-13,
                              0.0}

Definition at line 26 of file BFit.h.

C_4

const double BFit::C_4

staticprivate

Initial value:

= {0.0,
                              7.57194953855834e-6,
                              4.48169046115052e-9,
                              2.49606093449927e-8,
                              3.42264285146368e-9,
                              7.95338846845187e-9,
                              -1.57711106312732e-9,
                              1.02715424120585e-11,
                              2.57261485255293e-10,
                              -2.41682937761163e-11,
                              -2.27894837943020e-11,
                              7.98570801347331e-13,
                              1.17889573705870e-12,
                              1.64571374852252e-14,
                              -2.60212133934707e-14,
                              0.0}

Definition at line 27 of file BFit.h.

dZ

double magfieldparam::BFit::dZ

private

Definition at line 29 of file BFit.h.

dZ_0

const double BFit::dZ_0 = -2.62328760352034e-2

staticprivate

Definition at line 22 of file BFit.h.

dZ_2

const double BFit::dZ_2 = 5.94363870284212e-4

staticprivate

Definition at line 23 of file BFit.h.