added README.md

Mag_Field_Sweep_2024_10_21.py

@@ -2,7 +2,7 @@
 """
 Created on Fri Dec 22 15:10:10 2023
 Lightfield + Positioner 
-@author: Serdar, adjusted by Lukas
+@author: Serdar, adjusted by Lukas and Ryan
 """
 ############################################
 # Packages from Ryan

README.md

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+
+# Magnetic Field Sweep and Spatial Mapping Automation
+
+**Author:** Serdar (adjusted by Lukas and Ryan)  
+**Last Updated:** April 2025  
+**Filename:** `Mag_Field_Sweep_2024_10_21.py`
+
+## Overview
+
+This script automates spectral acquisition in a magneto-optical experiment using:
+
+- **LightField** for spectrometer control (Princeton Instruments)
+- **AMC Positioner** for precise spatial scanning
+- **Attocube APS100** power supplies for magnetic field control
+
+It enables:
+- Magnetic field sweeps along selected axes
+- Spatial scans across X-Y positions
+- B-field vector rotations with spectral capture
+- Live spectrum acquisition and intensity mapping
+
+## Features
+
+- **2D Spatial Scan:** Raster-scan across a surface using AMC positioners, capturing spectra at each coordinate.
+- **Magnetic Field Sweep:** Vary B-fields in controlled steps along x/y/z, measure spectra at each step.
+- **Field Rotation:** Circular B-field rotation (in-plane) with angle-defined steps.
+- **Automated File Handling:** Acquires `.spe` files, extracts and saves intensity/wavelengths, deletes intermediates.
+- **Flexible Configuration:** Resolution, range, exposure, filters, filenames and scan directions are all customizable.
+
+## Prerequisites
+
+### Hardware
+- AMC100/AMC300 positioner
+- Attocube APS100 single/dual-channel magnet power supplies
+- Spectrometer compatible with Princeton Instruments LightField
+
+### Software & Libraries
+- **Python 3.8+**
+- Packages: `pyvisa`, `numpy`, `matplotlib`, `pandas`, `clr`, `spe2py`, `spe_loader`, `AMC` module
+- .NET integration via `pythonnet`
+- LightField SDK: Princeton Instruments (with DLLs loaded via `clr`)
+
+> Note: Ensure `LIGHTFIELD_ROOT` environment variable is set.
+
+## Setup
+
+1. **Install dependencies**
+    ```bash
+    pip install pyvisa pandas numpy matplotlib pythonnet
+    ```
+
+2. **Ensure required DLLs** are present in:
+    ```
+    C:\Program Files\Princeton Instruments\LightField\
+    ```
+
+3. **Set up device IPs**
+    ```python
+    IP_AMC100 = "192.168.71.100"  # or AMC300
+    ```
+
+4. **Edit scan parameters in main block:**
+    ```python
+    range_x = 20000
+    range_y = 20000
+    resolution = 1000  # nanometers
+
+    set_llim_bval = -0.3
+    set_ulim_bval = 0.3
+    set_res_bval = 0.003  # Tesla
+    ```
+
+## Main Functions
+
+### `move_scan_xy(range_x, range_y, resolution, Settings, baseFileName)`
+Performs a 2D XY raster scan of the probe. Acquires spectra and saves results.
+
+### `sweep_b_val(instr, min_bval, max_bval, res, axis, Settings, base_file_name)`
+Sweeps magnetic field (in T) along the specified axis, collecting spectra at each field.
+
+### `ramp_b_val(instr, bval, magnet_coil)`
+Smooth ramping of B-field to target value.
+
+### `b_field_rotation(instr1, instr2, Babs, startangle, endangle, step, Settings)`
+Rotates the in-plane magnetic field by vector combination of Bx and By components.
+
+## File Saving
+
+- `.txt`: Intensity data and wavelength arrays saved to timestamped folders
+- Folder names include experiment metadata
+- `.spe` files are deleted after processing to conserve space
+
+## Usage Example
+
+To sweep B-field along the **Y-axis**:
+
+```python
+sweep_b_val(
+    instr=powerbox_singlesupply,
+    min_bval=-0.3,
+    max_bval=0.3,
+    res=0.003,
+    magnet_coil='y-axis',
+    Settings='experiment_config',
+    base_file_name='scan_name',
+    zerowhenfin_bool=True,
+    reversescan_bool=False,
+    loopscan_bool=True
+)
+```
+
+## Notes
+
+- Always close power supply connections with `.close()`
+- Make sure `.spe` files are not locked by LightField before running
+- The AMC section is currently commented — uncomment if positioner control is needed
+- Ensure `experiment.Load(...)` points to the correct `.lfe` config
+
+## Troubleshooting
+
+- **DLL loading issues?** Confirm path via `sys.path.append(...)` and DLL names.
+- **Communication errors?** Check serial port resource names via `pyvisa.ResourceManager().list_resources()`
+- **No spectra saved?** Ensure LightField is licensed and experiment file is valid.
+
+## License
+
+Internal use only – please contact the authors before distribution or reuse.