1 #ifndef ALIITSDRIFTSPEEDSDD_H
2 #define ALIITSDRIFTSPEEDSDD_H
3 /* Copyright(c) 2007-2009, ALICE Experiment at CERN, All rights reserved. *
4 * See cxx source for full Copyright notice */
8 ///////////////////////////////////////////////////////////////////
10 // Class for SDD drift speed extracted from injector triggers //
11 // drift speed dependence on anode number is parametrized via //
12 // a polynomial function (3rd degree by default, max. 5th degree)//
13 // Origin: F.Prino, Torino, prino@to.infn.it //
15 ///////////////////////////////////////////////////////////////////
20 class AliITSDriftSpeedSDD : public TObject {
22 AliITSDriftSpeedSDD();
23 AliITSDriftSpeedSDD(Int_t ev, UInt_t timest, Int_t deg, Double_t *coeff);
24 AliITSDriftSpeedSDD(const AliITSDriftSpeedSDD& drSpeed);
25 virtual ~AliITSDriftSpeedSDD(){};
27 static Float_t DefaultDriftSpeed() {return fgkDriftSpeedDefault;}
28 virtual Bool_t IsEqual(const TObject *obj) const
29 {return fEvNum == ((AliITSDriftSpeedSDD*)obj)->fEvNum;}
30 virtual Bool_t IsSortable() const { return kTRUE; }
31 virtual Int_t Compare(const TObject *obj) const
32 {if(fEvNum<((AliITSDriftSpeedSDD*)obj)->fEvNum) return -1;
33 else if(fEvNum>((AliITSDriftSpeedSDD*)obj)->fEvNum) return 1;
36 void PrintDriftSpeedParameters() const;
38 Int_t GetDegreeofPoly() const {return fPolDeg;}
39 Int_t GetEventNumber() const {return fEvNum;}
40 UInt_t GetEventTimestamp() const {return fTimestamp;}
41 Float_t GetDriftSpeedParameter(Int_t i) const {return fDriftSpeedParam[i];}
42 Double_t GetDriftSpeedAtAnode(Double_t nAnode) const{
43 Double_t drSpeed=fDriftSpeedParam[fgkMaxPolDeg];
44 for(Int_t i=fgkMaxPolDeg-1; i>=0; --i) drSpeed=fDriftSpeedParam[i]+nAnode*drSpeed;
47 static UShort_t GetMaxPolDeg() {return fgkMaxPolDeg;}
50 static const Float_t fgkDriftSpeedDefault; // default for drift speed
51 static const UShort_t fgkMaxPolDeg=5; // max. degree of the poly fit
53 Int_t fEvNum; // event number of injector event
54 UInt_t fTimestamp; // event timestamp
55 Char_t fPolDeg; // degree of the ploy fit to drift speed vs. anode
56 // saved as char since 1 byte is enough
57 Float_t fDriftSpeedParam[fgkMaxPolDeg+1]; // coefficients of the poly fit
58 ClassDef(AliITSDriftSpeedSDD,4);