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BrMagnetVolumeclass description - source file - inheritance tree class BrMagnetVolume : public BrDetectorVolume
private:
Data Members
protected:
Class DescriptionBrMagnetVolume is a BRAHMS data class providing storage and access function for magnetic volume and fieldinformation. The base class deals with an effective edge approximation. The idea is to have derived classes handle more complicated field. The magnet filed can now be set using the currents, rather than reading field from file. Example d5magvol->SetCurrent(350,"B") The default polynominal coefficients are sets in the constructor. The class is derived from BrDetectorVolume which maintains the coordinate system description, while this derived class contains the specific information about fields description, and current fiels values. BrMagnetVolume() Constructor. Set counter and list data members to zero. Don't use this constructor unless you have to and know what you are doing Use BrMagnetVolume(Char_t*, Char_t*); BrMagnetVolume(const Char_t *name, const Char_t *title, const Char_t *FileName) : BrDetectorVolume(name, title, FileName) named constructor BrMagnetVolume(const Char_t *name, const Char_t *title) : BrDetectorVolume(name, title) named constructor BrMagnetVolume(const Char_t *name, TObjArray *asciiVolList) : BrDetectorVolume(name, asciiVolList) named constructor called by BrGeometryDbManager in MySQL mode BrMagnetVolume(const Char_t *name, const Char_t *title, Float_t sizeX, Float_t sizeY, Float_t sizeZ, BrVector3D origin, BrRotMatrix rotMatrix, Float_t frontEdge, Float_t backEdge) : BrDetectorVolume(name,title,sizeX,sizeY,sizeZ,origin,rotMatrix) ------------------------------------------------------- Normal constructor specifying origin and rotation matrix ------------------------------------------------------- ~BrMagnetVolume() DTOR void SetDefaultCurrentParameters(const Char_t* name) ----------------------------------- Default current to field values. RD 12/47/2000 ----------------------------------- void ListParameters() const ---------------------------------------------- List all parameters, maybe should be changed to Print(const Option_t*). 2/22/02 - Slated to become obsolete - use Print() instead ---------------------------------------------- void Print(Option_t* option) const Options: B Basic information D Detector information Bool_t ReadASCIIFile(Char_t *FileName, Char_t *DetectorName) ------------------------------------------------------------------ Read Magnet parameters from a field file. Organized in a similar way as to the geometry, but has additional information on the field values. Each entry should have the following data. *** As of (12/11/98) GBRAHMS+gbr2c.f does not yet generate this. MAGNET= D5 gap x = 35.000 cm gap y = 10.000 cm gap z = 76.200 cm rotation ang = 34.000 deg. gap center x = 106.247 cm gap center y = 0.000 cm gap center z = 157.517 cm Type=edge Field (KG) = -6.00 z min = -42.000 cm z max = 42.000 cm ------------------------------------------------------------------- void SetCurrent(const Double_t I , const Char_t* Pol) --------------------------------------- Set field value given the intensity and polarity of the current --------------------------------------- Double_t GetCurrent(const Double_t Field ) Get the current corresponding to a Magnetic field --------------------------------------- BrPlane3D GetEffectiveEdgeEntrancePlane() ------------------------------------ return effective edge entrance plane ------------------------------------ BrPlane3D GetEffectiveEdgeExitPlane() ------------------------------------ return effective edge exit plane ------------------------------------ BrLine3D SwimBack(const BrLine3D& line, const Double_t momentum) -------------------------------------------------------------- A routine to take a track (represented by a line) which begins at the back face of the magnet, use the magnetic field and momentum and return a line which contains the coordinate where the track exits the front face of the magnet and the direction rotated by the change in angle. -------------------------------------------------------------- BrLine3D SwimForward(const BrLine3D& line, const Double_t momentum) -------------------------------------------------------------- A routine to take a track (represented by a line) which begins at the front face of the magnet, use the magnetic field and momentum and return a line which contains the coordinate where the track exits the front face of the magnet and the direction rotated by the change in angle. -------------------------------------------------------------- Bool_t GetSwimStatus(const BrLine3D& FrontLine, const BrLine3D& BackLine, Float_t FiduCutX,Float_t FiduCutY) -------------------------------------------------------- This method fits helix to the entry and exit line and check wheter the helix run within the magnet gap -------------------------------------------------------- Double_t GetBdl(const BrLine3D& FrontLine, const BrLine3D& BackLine) -------------------------------------------------------- This method fits helix to the entry and exit line calculate track lenght in the magnetic field and returns Bdl void Update() Do an update for a particular run. For the moment, most of the building is done in geodb manager. Perhaps, it will be moved soon. For the moment, we simply update the Keithley values from the DB. Bool_t FillMagnetParameters() Fill the magnet parameters from the DB BrDbMagnetVolume* GetMagnetWithCondition() Get detector volumes out of the DB with name like one specified and valid time less than run time. Then search through and find the one valid at the latest time which is earlier than the current run. We do that by looking for the smallest difference between the start of validity and the run time. void FillHallProbeList(Int_t start, Int_t end) Fill the Hall probe list with readings during this run. void UpdateField(Int_t time) This is the routine one would use to update the field based on the hall probe readings. Search through the list and take the last value that comes before time void SetFieldFromHallProbe(Float_t hallProbeValue) Set the field given the value of the hall probe reading Inline Functions
Double_t GetField() const
Double_t GetBdl(const BrLine3D& FrontLine, const BrLine3D& BackLine)
Double_t GetEdgeFront() const
Double_t GetEdgeBack() const
void SetField(const Double_t value)
void SetEdgeFront(const Double_t value)
void SetEdgeBack(const Double_t value)
TClass* Class()
TClass* IsA() const
void ShowMembers(TMemberInspector& insp, char* parent)
void Streamer(TBuffer& b)
void StreamerNVirtual(TBuffer& b)
BrMagnetVolume BrMagnetVolume(BrMagnetVolume&)
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Copyright ; 2002 BRAHMS Collaboration
<brahmlib@rcf.rhic.bnl.gov>
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