Vignesh Sitaraman
6e0100253b
modified: anasen_fem/garfield_sim.py new file: run_17F.sh new file: run_27Al.sh new file: scratch/test_eloss.h
80 lines
2.4 KiB
Python
80 lines
2.4 KiB
Python
import ROOT
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import os
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import sys
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# 1. FIX: Manually load the Garfield library if it's not in the ROOT namespace
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# Update this path to your actual installation location
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garfield_lib_path = "/home/vsitaraman/garfieldpp/install/lib/libGarfield.so"
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if os.path.exists(garfield_lib_path):
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ROOT.gSystem.Load(garfield_lib_path)
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else:
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print(f"CRITICAL ERROR: {garfield_lib_path} not found.")
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sys.exit(1)
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# Verify access
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try:
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test_gas = ROOT.Garfield.MediumMagboltz()
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except AttributeError:
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print("ERROR: Garfield shared library loaded, but 'Garfield' namespace not found.")
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print("Ensure Garfield was compiled with -DWITH_PYTHON=ON")
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sys.exit(1)
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# --- 2. GAS SETUP (96% He, 4% CO2) ---
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gas = ROOT.Garfield.MediumMagboltz()
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gas_file = "He96_CO2_4_260Torr.gas"
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if not os.path.exists(gas_file):
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print("Generating new Magboltz gas table (260 Torr)...")
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# --- Optimized Magboltz Settings ---
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gas.SetComposition("he", 96.0, "co2", 4.0)
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gas.SetTemperature(293.15)
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gas.SetPressure(260.0)
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# 1. Limit the Field Grid:
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gas.SetFieldGrid(10., 80000., 20, True)
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# 2. Reduce the precision slightly for the first run:
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gas.GenerateGasTable(5)
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gas.WriteGasFile(gas_file)
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else:
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print(f"Loading existing gas table: {gas_file}")
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gas.LoadGasFile(gas_file)
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# --- 3. FIELD MAP SETUP ---
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fm = ROOT.Garfield.ComponentElmer()
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# Update these filenames to match your Elmer SIF output exactly
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# Assuming ElmerGrid was run on 'wires2d' directory
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fm.Initialise("wires2d/mesh.nodes",
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"wires2d/mesh.elements",
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"wires2d/mesh.boundary",
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"wires2d/elfield_anasen.result", "mm")
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# Set the medium (Body 13 from your Gmsh script)
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fm.SetMedium(0, gas)
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# --- 4. SENSOR AND DRIFT SETUP ---
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sensor = ROOT.Garfield.Sensor()
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sensor.AddComponent(fm)
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# Heavy Ion Drift (RKF) - Best for the general track
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drift = ROOT.Garfield.DriftLineRKF()
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drift.SetSensor(sensor)
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# Electron Avalanche (Microscopic) - Best for high-field gain
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aval = ROOT.Garfield.AvalancheMicroscopic()
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aval.SetSensor(sensor)
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# --- 5. EXECUTION ---
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# Starting position (e.g., near the IC wires at r=23mm or closer to Anodes)
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x0, y0, z0, t0 = 35.0, 0.0, 0.0, 0.0
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print(f"Simulating heavy ion drift from r={x0}...")
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drift.DriftIon(x0, y0, z0, t0)
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print(f"Simulating electron avalanche from r={x0}...")
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# AvalancheElectron(x, y, z, t, energy, dx, dy, dz)
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aval.AvalancheElectron(x0, y0, z0, t0, 0.1, 0.0, 0.0, 0.0)
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print("Simulation complete.") |