* * $Id: gufld.F,v 3.1.1.1 2002/07/11 16:02:01 cafagna Exp $ * * $Log: gufld.F,v $ * Revision 3.1.1.1 2002/07/11 16:02:01 cafagna * First GPAMELA release on CVS * * *CMZ : 2.01/00 06/03/2000 13.07.03 by Francesco Cafagna *CMZ : 2.00/00 03/03/2000 15.39.05 by Francesco Cafagna *CMZU: 1.01/00 26/04/96 15.12.30 by Paolo (The Magic) Papini *-- Author : SUBROUTINE GUFLD(V,F) ************************************************************************ * * * To map Pamela magnetic field * * A bit of housekeeping: delete print statement etc. etc., by F. Caf. * * * * Variables definition: * * IN: * * V , vector with coordinates in MARS * * OUT: * * F , Magnetic field components along X, Y and Z * * * * Called by: GHELIX, GRKUTA * * Author: Paolo Papini 16/02/96 * * * ************************************************************************ #include "gpfield.inc" REAL*8 VVINT(3),FFINT(3) REAL V(3),F(3) REAL*8 CM_TO_M , TESLA_TO_KGAUSS PARAMETER(CM_TO_M=1.D-2 , TESLA_TO_KGAUSS = 1.D1) C* C INTEGER II,III C REAL DISM,F0X,F0Y,F0Z,F1X,F1Y,F1Z,F2X,F2Y,F2Z, C + F3X,F3Y,F3Z C REAL V(3),F(3),AV(3) C* C* Transform coordinates to Spectrometer frame C* C CALL GPMASPE(V) C* C* Take just the absolute value for the coordinates C* C DO I=1,3 C AV(I) = ABS( V(I) ) C ENDDO C F(1)=0. C F(2)=0. C F(3)=0. C* C* Check if we are outside the map C* C IF( (AV(1).GE.20).OR.(AV(2).GE.20).OR.(AV(3).GE.60.) ) C + GOTO 10 C IV(1)=INT(AV(1)*2.)+1 C IV(2)=INT(AV(2)*2.)+1 C IV(3)=INT(AV(3)/2.)+1 C DO I1=0,1 C DO I2=0,1 C DO I3=0,1 C II=I1*4+I2*2+I3+1 C VV(II,1)=FLOAT(IV(1)+I1-1)*0.5 C VV(II,2)=FLOAT(IV(2)+I2-1)*0.5 C VV(II,3)=FLOAT(IV(3)+I3-1)*2. C IVV(II,1)=IV(1)+I1 C IVV(II,2)=IV(2)+I2 C IVV(II,3)=IV(3)+I3 C DD(II)=(VV(II,1)-AV(1))**2 + (VV(II,2)-AV(2))**2 + C + (VV(II,3)-AV(3))**2 C ENDDO C ENDDO C ENDDO C* --- v0 C DISM=1.E9 C II=0 C DO I=1,8 C IF(DD(I).LT.DISM) THEN C DISM=DD(I) C II=I C END IF C END DO C DO I=1,3 C V0(I)=VV(II,I) C END DO C F0X=FX(IVV(II,1),IVV(II,2),IVV(II,3)) C F0Y=FY(IVV(II,1),IVV(II,2),IVV(II,3)) C F0Z=FZ(IVV(II,1),IVV(II,2),IVV(II,3)) C* --- v1 C V1(2)=V0(2) C V1(3)=V0(3) C IF(AV(1).GE.V0(1)) THEN C III=IVV(II,1)+1 C V1(1)=V0(1)+0.5 C ELSE C III=IVV(II,1)-1 C V1(1)=V0(1)-0.5 C END IF C F1X=FX(III,IVV(II,2),IVV(II,3)) C F1Y=FY(III,IVV(II,2),IVV(II,3)) C F1Z=FZ(III,IVV(II,2),IVV(II,3)) C* --- v2 C V2(1)=V0(1) C V2(3)=V0(3) C IF(AV(2).GE.V0(2)) THEN C III=IVV(II,2)+1 C V2(2)=V0(2)+0.5 C ELSE C III=IVV(II,2)-1 C V2(2)=V0(2)-0.5 C END IF C F2X=FX(IVV(II,1),III,IVV(II,3)) C F2Y=FY(IVV(II,1),III,IVV(II,3)) C F2Z=FZ(IVV(II,1),III,IVV(II,3)) C* --- v3 C V3(1)=V0(1) C V3(2)=V0(2) C IF(AV(3).GE.V0(3)) THEN C III=IVV(II,3)+1 C V3(3)=V0(3)+2. C ELSE C III=IVV(II,3)-1 C V3(3)=V0(3)-2. C END IF C F3X=FX(IVV(II,1),IVV(II,2),III) C F3Y=FY(IVV(II,1),IVV(II,2),III) C F3Z=FZ(IVV(II,1),IVV(II,2),III) C* --- linear interpolation, magnetic field calculation C CALL FLIN3(V0,V1,V2,V3,F0X,F1X,F2X,F3X,AV,F(1)) C CALL FLIN3(V0,V1,V2,V3,F0Y,F1Y,F2Y,F3Y,AV,F(2)) C CALL FLIN3(V0,V1,V2,V3,F0Z,F1Z,F2Z,F3Z,AV,F(3)) C* --- mirroing C IF(V(2).LT.0.) THEN C F(1)=-1.*F(1) C F(3)=-1.*F(3) C END IF C IF(V(1).LT.0.) F(1)=-1.*F(1) C IF(V(3).LT.0.) F(3)=-1.*F(3) C* C* Transform coordinates back to MARS C* C 10 CALL GPSPEMA(V) C RETURN C END * * * Transform coordinates to Spectrometer frame * CALL GPMASPE(V) * * INTERFACE TO TRACKER FIELD ROUTINES * DO I=1,3 VVINT(I) = DBLE(V(I)) * CM_TO_M ENDDO CALL inter_B(VVINT(1),VVINT(2),VVINT(3),FFINT) !coordinates in m, Field in Tesla DO I=1,3 F(I) = REAL( FFINT(I) * TESLA_TO_KGAUSS ) ENDDO * * Transform coordinates back to MARS * 10 CALL GPSPEMA(V) RETURN END