diff --git a/src/external/TFitPofB-lib/classes/TBofZCalc.cpp b/src/external/TFitPofB-lib/classes/TBofZCalc.cpp
index c3a725cd..d7a8f542 100644
--- a/src/external/TFitPofB-lib/classes/TBofZCalc.cpp
+++ b/src/external/TFitPofB-lib/classes/TBofZCalc.cpp
@@ -5,7 +5,7 @@
   Author: Bastian M. Wojek
   e-mail: bastian.wojek@psi.ch
 
-  2008/06/03
+  2008/06/30
 
 ***************************************************************************/
 
@@ -61,6 +61,26 @@ double TBofZCalc::GetBofZ(double zz) const {
 
 }
 
+//------------------
+// Constructor of the TLondon1D_1L class
+// 1D-London screening in a superconducting half-space
+// Parameters: Bext[G], deadlayer[nm], lambda[nm] 
+//------------------
+
+TLondon1D_HS::TLondon1D_HS(unsigned int steps, const vector<double> &param) {
+
+  fDZ = 200.0/double(steps);
+  double ZZ, BBz;
+
+  for (unsigned int j(0); j<steps; j++) {
+    ZZ = param[1] + (double)j*fDZ;
+    fZ.push_back(ZZ);
+    BBz = param[0]*exp(-(ZZ-param[1])/param[2]);
+    fBZ.push_back(BBz);
+  }
+
+}
+
 //------------------
 // Constructor of the TLondon1D_1L class
 // 1D-London screening in a thin superconducting film
diff --git a/src/external/TFitPofB-lib/classes/TLondon1D.cpp b/src/external/TFitPofB-lib/classes/TLondon1D.cpp
index f22028d1..65c1f569 100644
--- a/src/external/TFitPofB-lib/classes/TLondon1D.cpp
+++ b/src/external/TFitPofB-lib/classes/TLondon1D.cpp
@@ -5,7 +5,7 @@
   Author: Bastian M. Wojek
   e-mail: bastian.wojek@psi.ch
 
-  2008/06/06
+  2008/06/30
 
 ***************************************************************************/
 
@@ -16,6 +16,7 @@ using namespace std;
 #include <TSAXParser.h>
 #include "TFitPofBStartupHandler.h"
 
+ClassImp(TLondon1DHS)
 ClassImp(TLondon1D1L)
 ClassImp(TLondon1D2L)
 ClassImp(TLondon1D3L)
@@ -23,9 +24,21 @@ ClassImp(TLondon1D3LS)
 
 
 //------------------
-// Destructor of the TLondon1D1L/2L/3L/3LS classes -- cleaning up
+// Destructor of the TLondon1DHS/1L/2L/3L/3LS classes -- cleaning up
 //------------------
 
+TLondon1DHS::~TLondon1DHS() {
+    cout << "This is the TLondon1DHS-destructor. Jippieh!" << endl;
+    fPar.clear();
+    fParForBofZ.clear();
+    fParForPofB.clear();
+    fParForPofT.clear();
+    delete fImpProfile;
+    fImpProfile = 0;
+    delete fPofT;
+    fPofT = 0;
+}
+
 TLondon1D1L::~TLondon1D1L() {
     cout << "This is the TLondon1D1L-destructor. Jippieh!" << endl;
     fPar.clear();
@@ -74,6 +87,140 @@ TLondon1D3LS::~TLondon1D3LS() {
     fPofT = 0;
 }
 
+//------------------
+// Constructor of the TLondon1DHS class -- reading available implantation profiles and
+// creates (a pointer to) the TPofTCalc object (with the FFT plan)
+//------------------
+
+TLondon1DHS::TLondon1DHS() : fCalcNeeded(true), fFirstCall(true) {
+    cout << "This is the TLondon1DHS-constructor. Juhu!" << endl;
+
+    // read startup file
+    string startup_path_name("TFitPofB_startup.xml");
+
+    TSAXParser *saxParser = new TSAXParser();
+    TFitPofBStartupHandler *startupHandler = new TFitPofBStartupHandler();
+    saxParser->ConnectToHandler("TFitPofBStartupHandler", startupHandler);
+    int status (saxParser->ParseFile(startup_path_name.c_str()));
+    // check for parse errors
+    if (status) { // error
+      cout << endl << "**WARNING** reading/parsing TFitPofB_startup.xml failed." << endl;
+    }
+
+    fNSteps = startupHandler->GetNSteps();
+    fWisdom = startupHandler->GetWisdomFile();
+    string rge_path(startupHandler->GetDataPath());
+    vector<string> energy_vec(startupHandler->GetEnergyList());
+
+    fParForPofT.push_back(0.0);
+    fParForPofT.push_back(startupHandler->GetDeltat());
+    fParForPofT.push_back(startupHandler->GetDeltaB());
+
+    fParForPofB.push_back(startupHandler->GetDeltat());
+    fParForPofB.push_back(startupHandler->GetDeltaB());
+    fParForPofB.push_back(0.0);
+
+    TTrimSPData *x = new TTrimSPData(rge_path, energy_vec);
+    fImpProfile = x;
+    x = 0;
+    delete x;
+
+    TPofTCalc *y = new TPofTCalc(fWisdom, fParForPofT);
+    fPofT = y;
+    y = 0;
+    delete y;
+
+    // clean up
+    if (saxParser) {
+      delete saxParser;
+      saxParser = 0;
+    }
+    if (startupHandler) {
+      delete startupHandler;
+      startupHandler = 0;
+    }
+}
+
+//------------------
+// TLondon1DHS-Method that calls the procedures to create B(z), p(B) and P(t)
+// It finally returns P(t) for a given t.
+// Parameters: all the parameters for the function to be fitted through TLondon1DHS
+//------------------
+
+double TLondon1DHS::operator()(double t, const vector<double> &par) const {
+  if(t<0.0)
+    return 0.0;
+
+  // check if the function is called the first time and if yes, read in parameters
+
+  if(fFirstCall){
+    fPar = par;
+
+    for (unsigned int i(0); i<fPar.size(); i++){
+      cout << "fPar[" << i << "] = " << fPar[i] << endl;
+    }
+
+    for (unsigned int i(2); i<fPar.size(); i++){
+      fParForBofZ.push_back(fPar[i]);
+      cout << "fParForBofZ[" << i-2 << "] = " << fParForBofZ[i-2] << endl;
+    }
+    fFirstCall=false;
+  cout << this << endl;
+  }
+
+  // check if any parameter has changed
+
+  bool par_changed(false);
+  bool only_phase_changed(false);
+
+  for (unsigned int i(0); i<fPar.size(); i++) {
+    if( fPar[i]-par[i] ) {
+      fPar[i] = par[i];
+      par_changed = true;
+      if (i == 0) {
+        only_phase_changed = true;
+      } else {
+        only_phase_changed = false;
+      }
+    }
+  }
+
+  if (par_changed)
+    fCalcNeeded = true;
+
+  // if model parameters have changed, recalculate B(z), P(B) and P(t)
+
+  if (fCalcNeeded) {
+
+    fParForPofT[0] = par[0]; // phase
+
+    if(!only_phase_changed) {
+
+//      cout << " Parameters have changed, (re-)calculating p(B) and P(t) now..." << endl;
+
+      for (unsigned int i(2); i<fPar.size(); i++)
+        fParForBofZ[i-2] = par[i];
+
+      fParForPofB[2] = par[1]; // energy
+
+      TLondon1D_HS BofZ(fNSteps, fParForBofZ);
+      TPofBCalc PofB(BofZ, *fImpProfile, fParForPofB);
+      fPofT->DoFFT(PofB);
+
+    }/* else {
+      cout << "Only the phase parameter has changed, (re-)calculating P(t) now..." << endl;
+    }*/
+
+    fPofT->CalcPol(fParForPofT);
+
+    fCalcNeeded = false;
+  }
+
+  return fPofT->Eval(t);
+
+}
+
+
 //------------------
 // Constructor of the TLondon1D1L class -- reading available implantation profiles and
 // creates (a pointer to) the TPofTCalc object (with the FFT plan)
diff --git a/src/external/TFitPofB-lib/include/TBofZCalc.h b/src/external/TFitPofB-lib/include/TBofZCalc.h
index dc0b4a58..bf30ce8f 100644
--- a/src/external/TFitPofB-lib/include/TBofZCalc.h
+++ b/src/external/TFitPofB-lib/include/TBofZCalc.h
@@ -5,7 +5,7 @@
   Author: Bastian M. Wojek
   e-mail: bastian.wojek@psi.ch
 
-  2008/06/03
+  2008/06/30
 
 ***************************************************************************/
 
@@ -44,6 +44,18 @@ protected:
   double fDZ;
 };
 
+//--------------------
+// Class "for Meissner screening" in a superconducting half-space
+//--------------------
+
+class TLondon1D_HS : public TBofZCalc {
+
+public:
+
+  TLondon1D_HS(unsigned int, const vector<double>& );
+
+};
+
 //--------------------
 // Class "for Meissner screening" in a thin superconducting film
 //--------------------
diff --git a/src/external/TFitPofB-lib/include/TLondon1D.h b/src/external/TFitPofB-lib/include/TLondon1D.h
index fe0505d9..0c9b337e 100644
--- a/src/external/TFitPofB-lib/include/TLondon1D.h
+++ b/src/external/TFitPofB-lib/include/TLondon1D.h
@@ -5,7 +5,7 @@
   Author: Bastian M. Wojek
   e-mail: bastian.wojek@psi.ch
 
-  2008/06/06
+  2008/06/30
 
 ***************************************************************************/
 
@@ -15,6 +15,30 @@
 #include "PUserFcnBase.h"
 #include "TPofTCalc.h"
 
+class TLondon1DHS : public PUserFcnBase {
+
+public:
+  // default conctructor
+  TLondon1DHS();
+  ~TLondon1DHS();
+
+  double operator()(double, const vector<double>&) const;
+
+private:
+  mutable vector<double> fPar;
+  TTrimSPData *fImpProfile;
+  TPofTCalc *fPofT;
+  mutable bool fCalcNeeded;
+  mutable bool fFirstCall;
+  mutable vector<double> fParForPofT;
+  mutable vector<double> fParForBofZ;
+  mutable vector<double> fParForPofB;
+  string fWisdom;
+  unsigned int fNSteps;
+
+  ClassDef(TLondon1DHS,1)
+};
+
 class TLondon1D1L : public PUserFcnBase {
 
 public:
diff --git a/src/external/TFitPofB-lib/include/TLondon1DLinkDef.h b/src/external/TFitPofB-lib/include/TLondon1DLinkDef.h
index 57217f01..3af86b93 100644
--- a/src/external/TFitPofB-lib/include/TLondon1DLinkDef.h
+++ b/src/external/TFitPofB-lib/include/TLondon1DLinkDef.h
@@ -5,7 +5,7 @@
   Author: Bastian M. Wojek
   e-mail: bastian.wojek@psi.ch
 
-  2008/05/29
+  2008/06/30
 
 ***************************************************************************/
 
@@ -16,6 +16,7 @@
 #pragma link off all classes;
 #pragma link off all functions;
 
+#pragma link C++ class TLondon1DHS+;
 #pragma link C++ class TLondon1D1L+;
 #pragma link C++ class TLondon1D2L+;
 #pragma link C++ class TLondon1D3L+;