Merge branch 'devel_vignesh' of https://fsunuc.physics.fsu.edu/git/rtang/ANASEN_analysis into devel_vignesh

.gitignore

@@ -31,4 +31,6 @@ qqq_relative_gains.dat
 Armory/CorrelateQQQ.h
 QQQStage2.C
 anasen_fem/scalars.dat.names
+myenv/
+eloss_calculations/
 anasen_fem/He96_CO2_4_260Torr.gas

ELoss/Eloss.py

@@ -0,0 +1,62 @@
+import pycatima as catima
+import numpy as np
+
+# --- 1. Constants ---
+P_TORR = 250
+TEMP_K = 293.15 
+R = 8.3144
+MEV2U = 1.0 / 931.494
+
+# Gas Density Calculations
+p_pa = P_TORR * 133.322
+molar_density = p_pa / (R * TEMP_K)
+m_he, m_c, m_o = 4.0026, 12.0000, 15.9949
+m_mix_avg = (0.96 * m_he) + (0.04 * (m_c + 2*m_o))
+rho_g_cm3 = (molar_density * m_mix_avg) / 1e6
+print(f"Gas density at {P_TORR} Torr: {rho_g_cm3:.6e} g/cm^3")
+
+# --- 2. Material & Step Setup ---
+material_def = [(m_he, 2, 0.96), (m_c, 6, 0.04), (m_o, 8, 0.08)]
+gas_mix = catima.Material(material_def)
+gas_mix.density(rho_g_cm3)
+
+# Thickness step settings
+step_mg_cm2 = 0.001           # 1 ug/cm2 steps as per your example
+step_g_cm2 = step_mg_cm2 / 1000.0 
+max_steps = 100000             # Adjust based on how far you want to track
+
+def generate_lookup(z, mass_u, e_start_mev, label):
+    filename = f"{label}_lookup_{e_start_mev}MeV.dat"
+    projectile = catima.Projectile(mass_u, z)
+    
+    current_e_total = e_start_mev
+    current_thickness_g_cm2 = 0.0
+    
+    output = []
+    header = f"Energy(MeV) \tmg/cm2 \tcm\nStarting Energy: {e_start_mev} MeV"
+
+    for i in range(max_steps):
+        # 1. Record current state
+        dist_cm = current_thickness_g_cm2 / rho_g_cm3
+        output.append([current_e_total, current_thickness_g_cm2 * 1000.0, dist_cm])
+        
+        # 2. Calculate energy loss for the NEXT step
+        e_u = current_e_total / mass_u
+        if e_u < 0.01: # Stop at ATIMA limit
+            break
+            
+        projectile.T(e_u)
+        # dedx returns MeV / (g/cm2)
+        loss_mev = catima.dedx(projectile, gas_mix) * step_g_cm2
+        
+        # 3. Update values
+        current_e_total -= loss_mev
+        current_thickness_g_cm2 += step_g_cm2
+
+    np.savetxt(filename, output, fmt='%.6f', delimiter='\t', header=header)
+    print(f"Lookup table created: {filename}")
+
+# --- 3. Run ---
+# Format: generate_lookup(Z, mass_u, E_start_MeV, label)
+generate_lookup(1, 1.0078, 20, "proton")
+generate_lookup(2, 4.0026, 20, "alpha")

MakeVertex.C

@@ -156,7 +156,7 @@ void MakeVertex::Begin(TTree * /*tree*/)
     fflush(stdout);
     //usleep(4e5);
     // Load PC Calibrations
-    std::ifstream inputFile("slope_intercept_results_"+dataset+".txt");
+    std::ifstream inputFile("slope_intercept_results_"+dataset+".dat");
     if (inputFile.is_open())
     {
         std::string line;