Diamond Anvil Cell Utilities

Rampy can be useful if you are performing Diamond Anvil Cell experiments, to process florescence spectra of pressure sensors for instance, or remove the diamond background.

Here is some helper functions for DAC experiments!

Pressure calculations

rampy.dac.borate_T_corr(T_K: float | ndarray) → float | ndarray

Computes the temperature correction for the SrB4O7:Sm2+ pressure scale.

This function calculates the temperature-dependent correction to the wavelength of the SrB4O7:Sm2+ fluorescence line, based on Datchi et al. (2007), Eq. 9.

Parameters:

T_K (float or np.ndarray) – Temperature in Kelvin.

Returns:

Temperature correction in nanometers.

Return type:

float or np.ndarray

References

Datchi, F., et al. (2007). Optical pressure sensors for high-pressure–high-temperature studies in a diamond anvil cell. High Pressure Research, 27, 447–463.

rampy.dac.pressure_sensor(lbd_nm: float | ndarray, T_K: float | ndarray, scale: str = 'ruby', lbd_0_ruby: float = 694.22, lbd_0_borate: float = 685.44, borate_scale: str = 'datchi2007') → float | ndarray

Converts the wavelength of fluorescence lines into pressure in GPa.

This function calculates pressure using either the Ruby R1 fluorescence line or the SrB4O7:Sm2+ fluorescence line, with optional temperature corrections.

Parameters:

  • lbd_nm (float or np.ndarray) – Measured wavelength of the fluorescence line in nanometers.

  • T_K (float or np.ndarray) – Temperature in Kelvin.

  • scale (str, optional) – Pressure scale to use (‘ruby’ or ‘borate’). Default is ‘ruby’.

  • lbd_0_ruby (float, optional) – Reference wavelength of the R1 Ruby line at ambient conditions. Default is 694.22 nm.

  • lbd_0_borate (float, optional) – Reference wavelength of the SrB4O7:Sm2+ line at ambient conditions. Default is 685.44 nm.

  • borate_scale (str, optional) – Borate pressure scale to use (‘datchi2007’ or ‘rashchenko2015’). Default is ‘datchi2007’.

Returns:

Pressure in GPa.

Return type:

float or np.ndarray

Raises:

ValueError – If an invalid scale or borate_scale is specified.

Notes

  • The Ruby pressure scale follows Shen et al. (2020).

  • The Borate pressure scales are based on Datchi et al. (2007) and Rashchenko et al. (2015).

  • Temperature corrections are applied using Datchi et al. (2007). To disable temperature corrections, set T_K=296.0.

References

  • Datchi, F., et al. (2007). High Pressure Research, 27, 447–463.

  • Rashchenko, S.V., et al. (2015). Journal of Applied Physics, 117, 145902.

  • Shen, G., et al. (2020). High Pressure Research, 40, 299–314.

rampy.dac.ruby_T_corr(T_K: float | ndarray) → float | ndarray

Computes the temperature correction for the Ruby pressure scale.

This function calculates the temperature-dependent correction to the wavelength of the R1 Ruby fluorescence line, based on Datchi et al. (2007), Eq. 2.

Parameters:

T_K (float or np.ndarray) – Temperature in Kelvin.

Returns:

Temperature correction in nanometers.

Return type:

float or np.ndarray

References

Datchi, F., et al. (2007). Optical pressure sensors for high-pressure–high-temperature studies in a diamond anvil cell. High Pressure Research, 27, 447–463.