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   "source": [
    "# Manual Matching of a WEST ICRH Antenna on Plasma"
   ]
  },
  {
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   "id": "808b14fd-dc7e-412c-abfa-b3ca0254598b",
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   "source": [
    "This notebook calculates the charts used in the internal documentation for the IC Operators for the manual matching on plasma. "
   ]
  },
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   "execution_count": null,
   "id": "14c9acaa-9f2e-4f89-bb51-6b9497c88ef6",
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   "source": [
    "import matplotlib.pyplot as plt\n",
    "import numpy as np\n",
    "from tqdm.notebook import tqdm\n",
    "import skrf as rf\n",
    "\n",
    "# WEST ICRH Antenna package\n",
    "import sys; sys.path.append('..')\n",
    "from west_ic_antenna import WestIcrhAntenna\n",
    "#rf.stylely()"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "6c69f03f-a506-4d68-bdd7-f9e5fe758d4d",
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   "source": [
    "# Capacitance Diff vs Coupling Resitance\n",
    "For a given RF frequency $f_0$ and phase setup, an antenna is generally first matched on vacuum conditions, leading to a couple of solution (C1, C2, C3, C4)."
   ]
  },
  {
   "cell_type": "markdown",
   "id": "297462ea-0a2f-4e07-bfc1-ed705f93be18",
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   "source": [
    "For the WEST preset frequencies, We create multiple plasma scenarios for low to high coupling cases and for each of them we determine the best matching point:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "566888d7-4c62-47ae-a22d-20c98d06e509",
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   "source": [
    "# WEST Antenna matched on vacuum condition in dipole (default) for a given frequency\n",
    "f0_MHzs = [55.5, 57] # [48, 53, 55.5, 57, 63]\n",
    "delta_Cs = {}\n",
    "\n",
    "for f0_MHz in tqdm(f0_MHzs):\n",
    "    freq = rf.Frequency(f0_MHz, f0_MHz, npoints=1, unit='MHz')\n",
    "    ant_vacuum = WestIcrhAntenna(frequency=freq)  # default is vacuum coupling\n",
    "    Cs_vac = ant_vacuum.match_both_sides()\n",
    "    \n",
    "    Rcs = np.linspace(0.4, 1.7, num=10)\n",
    "    Cs_plasmas = []\n",
    "    \n",
    "    for Rc in tqdm(Rcs):\n",
    "        plasma = WestIcrhAntenna.interpolate_front_face(Rc, source='TOPICA-H-mode')\n",
    "        ant_plasma = WestIcrhAntenna(frequency=freq, front_face=plasma)\n",
    "        Cs_plasma = ant_plasma.match_both_sides()\n",
    "        Cs_plasmas.append(Cs_plasma)\n",
    "        \n",
    "    delta_Cs[f0_MHz] = np.array(Cs_plasmas) - np.array(Cs_vac)"
   ]
  },
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   "cell_type": "code",
   "execution_count": null,
   "id": "adeffd01-319d-4240-afdd-0ffdad081ef2",
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   "source": [
    "fig, ax = plt.subplots()\n",
    "for f0_MHz in tqdm(f0_MHzs):\n",
    "    ax.plot(Rcs, abs(delta_Cs[f0_MHz][:,0] + delta_Cs[f0_MHz][:,2])/2, marker='^', label=f'{f0_MHz} MHz - Top')\n",
    "    ax.plot(Rcs, abs(delta_Cs[f0_MHz][:,1] + delta_Cs[f0_MHz][:,3])/2, marker='v', label=f'{f0_MHz} MHz - Bot')\n",
    "ax.set_xlabel('Coupling Resistance $R_c$ [Ohm]')\n",
    "ax.set_ylabel('Capacitance Shift $\\Delta C$ [pF]')\n",
    "ax.set_title('Capacitance Shift to add from Vacuum Match Points (55 MHz)')\n",
    "ax.legend()\n",
    "ax.grid(True)"
   ]
  }
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