TrackerSystematicMisalignments.cc

Go to the documentation of this file.

#include "FWCore/Framework/interface/ESHandle.h"
#include "Geometry/Records/interface/IdealGeometryRecord.h"
#include "Geometry/Records/interface/TrackerTopologyRcd.h"
#include "Geometry/TrackerGeometryBuilder/interface/TrackerGeomBuilderFromGeometricDet.h"
#include "CondFormats/GeometryObjects/interface/PTrackerParameters.h"
#include "Geometry/Records/interface/PTrackerParametersRcd.h"

#include "Alignment/CommonAlignment/interface/SurveyDet.h"
#include "Alignment/TrackerAlignment/interface/AlignableTracker.h"

#include "CondFormats/Alignment/interface/Alignments.h"
#include "CondFormats/AlignmentRecord/interface/TrackerAlignmentRcd.h"
#include "CondFormats/Alignment/interface/AlignmentErrorsExtended.h"
#include "CondFormats/AlignmentRecord/interface/TrackerAlignmentErrorExtendedRcd.h"
#include "CondFormats/Alignment/interface/DetectorGlobalPosition.h"
#include "CondFormats/AlignmentRecord/interface/GlobalPositionRcd.h"

#include "FWCore/Framework/interface/EventSetup.h"
#include "FWCore/MessageLogger/interface/MessageLogger.h"
#include "FWCore/ParameterSet/interface/ParameterSet.h"

#include "DataFormats/DetId/interface/DetId.h"
#include "Geometry/Records/interface/TrackerDigiGeometryRecord.h"
#include "Geometry/TrackerGeometryBuilder/interface/TrackerGeometry.h"
#include "Geometry/CommonTopologies/interface/GeometryAligner.h"
#include "CLHEP/Random/RandGauss.h"

#include "Alignment/TrackerAlignment/plugins/TrackerSystematicMisalignments.h"

#include "DataFormats/SiStripDetId/interface/SiStripDetId.h"  // for enums TID/TIB/etc.

// Database
#include "CondCore/DBOutputService/interface/PoolDBOutputService.h"
#include "FWCore/ServiceRegistry/interface/Service.h"

// -----------------------------------------------------------------
// 2010-05-20 Frank Meier
// Changed sign of z-correction, i.e. z-expansion is now an expansion
// made some variables constant, removed obviously dead code and comments

TrackerSystematicMisalignments::TrackerSystematicMisalignments(const edm::ParameterSet& cfg)
  : theAlignableTracker(0)
{
    // use existing geometry
    m_fromDBGeom = cfg.getUntrackedParameter< bool > ("fromDBGeom");

    // constants
    m_radialEpsilon = cfg.getUntrackedParameter< double > ("radialEpsilon");
    m_telescopeEpsilon = cfg.getUntrackedParameter< double > ("telescopeEpsilon");
    m_layerRotEpsilon = cfg.getUntrackedParameter< double > ("layerRotEpsilon");
    m_bowingEpsilon = cfg.getUntrackedParameter< double > ("bowingEpsilon");
    m_zExpEpsilon = cfg.getUntrackedParameter< double > ("zExpEpsilon");
    m_twistEpsilon = cfg.getUntrackedParameter< double > ("twistEpsilon");
    m_ellipticalEpsilon = cfg.getUntrackedParameter< double > ("ellipticalEpsilon");
    m_skewEpsilon = cfg.getUntrackedParameter< double > ("skewEpsilon");
    m_sagittaEpsilon = cfg.getUntrackedParameter< double > ("sagittaEpsilon");

    m_ellipticalDelta = cfg.getUntrackedParameter< double > ("ellipticalDelta");
    m_skewDelta = cfg.getUntrackedParameter< double > ("skewDelta");
    m_sagittaDelta = cfg.getUntrackedParameter< double > ("sagittaDelta");

    if (m_radialEpsilon > -990.0){
        edm::LogWarning("MisalignedTracker") << "Applying radial ...";
    }
    if (m_telescopeEpsilon > -990.0){
        edm::LogWarning("MisalignedTracker") << "Applying telescope ...";
    }
    if (m_layerRotEpsilon > -990.0){
        edm::LogWarning("MisalignedTracker") << "Applying layer rotation ...";
    }
    if (m_bowingEpsilon > -990.0){
        edm::LogWarning("MisalignedTracker") << "Applying bowing ...";
    }
    if (m_zExpEpsilon > -990.0){
        edm::LogWarning("MisalignedTracker") << "Applying z-expansion ...";
    }
    if (m_twistEpsilon > -990.0){
        edm::LogWarning("MisalignedTracker") << "Applying twist ...";
    }
    if (m_ellipticalEpsilon > -990.0){
        edm::LogWarning("MisalignedTracker") << "Applying elliptical ...";
    }
    if (m_skewEpsilon > -990.0){
        edm::LogWarning("MisalignedTracker") << "Applying skew ...";
    }
    if (m_sagittaEpsilon > -990.0){
        edm::LogWarning("MisalignedTracker") << "Applying sagitta ...";
    }

    // get flag for suppression of blind movements
    suppressBlindMvmts = cfg.getUntrackedParameter< bool > ("suppressBlindMvmts");
    if (suppressBlindMvmts)
    {
        edm::LogWarning("MisalignedTracker") << "Blind movements suppressed (TIB/TOB in z, TID/TEC in r)";
    }

    // compatibility with old (weird) z convention
    oldMinusZconvention = cfg.getUntrackedParameter< bool > ("oldMinusZconvention");
    if (oldMinusZconvention)
    {
        edm::LogWarning("MisalignedTracker") << "Old z convention: dz --> -dz";
    }
    else
    {
        edm::LogWarning("MisalignedTracker") << "New z convention: dz --> dz";
    }

}

void TrackerSystematicMisalignments::beginJob()
{

}


void TrackerSystematicMisalignments::analyze(const edm::Event& event, const edm::EventSetup& setup){

    //Retrieve tracker topology from geometry
    edm::ESHandle<TrackerTopology> tTopoHandle;
    setup.get<TrackerTopologyRcd>().get(tTopoHandle);
    const TrackerTopology* const tTopo = tTopoHandle.product();

    edm::ESHandle<GeometricDet> geom;
    setup.get<IdealGeometryRecord>().get(geom);
    edm::ESHandle<PTrackerParameters> ptp;
    setup.get<PTrackerParametersRcd>().get( ptp );
    TrackerGeometry* tracker = TrackerGeomBuilderFromGeometricDet().build(&*geom, *ptp, tTopo );

    //take geometry from DB or randomly generate geometry
    if (m_fromDBGeom){
        //build the tracker
        edm::ESHandle<Alignments> alignments;
        edm::ESHandle<AlignmentErrorsExtended> alignmentErrors;

        setup.get<TrackerAlignmentRcd>().get(alignments);
        setup.get<TrackerAlignmentErrorExtendedRcd>().get(alignmentErrors);

        edm::ESHandle<Alignments> globalPositionRcd;
        setup.get<TrackerDigiGeometryRecord>().getRecord<GlobalPositionRcd>().get(globalPositionRcd);

        //apply the latest alignments
        GeometryAligner aligner;
        aligner.applyAlignments<TrackerGeometry>( &(*tracker), &(*alignments), &(*alignmentErrors),
                              align::DetectorGlobalPosition(*globalPositionRcd, DetId(DetId::Tracker)));

    }

    theAlignableTracker = new AlignableTracker(&(*tracker), tTopo);

    applySystematicMisalignment( &(*theAlignableTracker) );

    // -------------- writing out to alignment record --------------
    Alignments* myAlignments = theAlignableTracker->alignments() ;
    AlignmentErrorsExtended* myAlignmentErrorsExtended = theAlignableTracker->alignmentErrors() ;

    // Store alignment[Error]s to DB
    edm::Service<cond::service::PoolDBOutputService> poolDbService;
    std::string theAlignRecordName = "TrackerAlignmentRcd";
    std::string theErrorRecordName = "TrackerAlignmentErrorExtendedRcd";

    // Call service
    if( !poolDbService.isAvailable() ) // Die if not available
        throw cms::Exception("NotAvailable") << "PoolDBOutputService not available";

    poolDbService->writeOne<Alignments>(&(*myAlignments), poolDbService->beginOfTime(), theAlignRecordName);
    poolDbService->writeOne<AlignmentErrorsExtended>(&(*myAlignmentErrorsExtended), poolDbService->beginOfTime(), theErrorRecordName);
}

void TrackerSystematicMisalignments::applySystematicMisalignment(Alignable* ali)
{

    const align::Alignables& comp = ali->components();
    unsigned int nComp = comp.size();
    //move then do for lower level object
    //for issue of det vs detunit
    bool usecomps = true;
    if ((ali->alignableObjectId()==2)&&(nComp>=1)) usecomps = false;
    for (unsigned int i = 0; i < nComp; ++i){
        if (usecomps) applySystematicMisalignment(comp[i]);
    }

    // if suppression of blind mvmts: check if subdet is blind to a certain mode
    bool blindToZ(false), blindToR(false);
    if (suppressBlindMvmts)
    {
        const int subdetid = ali->geomDetId().subdetId();
        switch(subdetid)
        {
            // TIB/TON blind to z
            case SiStripDetId::TIB:
            case SiStripDetId::TOB:
                blindToZ = true;
                break;
            // TID/TEC blind to R
            case SiStripDetId::TID:
            case SiStripDetId::TEC:
                blindToR = true;
                break;
            default:
                break;
        }
    }

    const int level = ali->alignableObjectId();
    if ((level == 1)||(level == 2)){
        const align::PositionType gP = ali->globalPosition();
        const align::GlobalVector gVec = findSystematicMis( gP, blindToZ, blindToR);
        ali->move( gVec );
    }
}

align::GlobalVector TrackerSystematicMisalignments::findSystematicMis( const align::PositionType& globalPos, const bool blindToZ, const bool blindToR ){
//align::GlobalVector TrackerSystematicMisalignments::findSystematicMis( align::PositionType globalPos ){
    // calculates shift for the current alignable
    // all corrections are calculated w.r.t. the original geometry
    double deltaX = 0.0;
    double deltaY = 0.0;
    double deltaZ = 0.0;
    const double oldX = globalPos.x();
    const double oldY = globalPos.y();
    const double oldZ = globalPos.z();
    const double oldPhi = globalPos.phi();
    const double oldR = sqrt(globalPos.x()*globalPos.x() + globalPos.y()*globalPos.y());

    if (m_radialEpsilon > -990.0 && !blindToR){
        deltaX += m_radialEpsilon*oldX;
        deltaY += m_radialEpsilon*oldY;
    }
    if (m_telescopeEpsilon > -990.0 && !blindToZ){
        deltaZ += m_telescopeEpsilon*oldR;
    }
    if (m_layerRotEpsilon > -990.0){
        // The following number was chosen such that the Layer Rotation systematic
        // misalignment would not cause an overall rotation of the tracker.
        const double Roffset = 57.0;
        const double xP = oldR*cos(oldPhi+m_layerRotEpsilon*(oldR-Roffset));
        const double yP = oldR*sin(oldPhi+m_layerRotEpsilon*(oldR-Roffset));
        deltaX += (xP - oldX);
        deltaY += (yP - oldY);
    }
    if (m_bowingEpsilon > -990.0 && !blindToR){
        const double trackeredgePlusZ=271.846;
        const double bowfactor=m_bowingEpsilon*(trackeredgePlusZ*trackeredgePlusZ-oldZ*oldZ);
        deltaX += oldX*bowfactor;
        deltaY += oldY*bowfactor;
    }
    if (m_zExpEpsilon > -990.0 && !blindToZ){
        deltaZ += oldZ*m_zExpEpsilon;
    }
    if (m_twistEpsilon > -990.0){
        const double xP = oldR*cos(oldPhi+m_twistEpsilon*oldZ);
        const double yP = oldR*sin(oldPhi+m_twistEpsilon*oldZ);
        deltaX += (xP - oldX);
        deltaY += (yP - oldY);
    }
    if (m_ellipticalEpsilon > -990.0 && !blindToR){
        deltaX += oldX*m_ellipticalEpsilon*cos(2.0*oldPhi + m_ellipticalDelta);
        deltaY += oldY*m_ellipticalEpsilon*cos(2.0*oldPhi + m_ellipticalDelta);
    }
    if (m_skewEpsilon > -990.0 && !blindToZ){
        deltaZ += m_skewEpsilon*cos(oldPhi + m_skewDelta);
    }
    if (m_sagittaEpsilon > -990.0){
        // deltaX += oldX/fabs(oldX)*m_sagittaEpsilon; // old one...
        deltaX += oldR*m_sagittaEpsilon*sin(m_sagittaDelta);
        deltaY += oldR*m_sagittaEpsilon*cos(m_sagittaDelta);    //Delta y is cos so that delta=0 reflects the old behavior
    }

    // Compatibility with old version <= 1.5
    if (oldMinusZconvention) deltaZ = -deltaZ;

    align::GlobalVector gV( deltaX, deltaY, deltaZ );
    return gV;
}

// Plug in to framework

#include "FWCore/Framework/interface/MakerMacros.h"

DEFINE_FWK_MODULE(TrackerSystematicMisalignments);