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Introduction

This tutorial aims to show typical workflows. It is not thought to be thoughtlessly copied but rather to show how some of the commands in Frida-1 can be used. Hopefully, one feels eager to further explore this powerful program…

Read Data, subtract a background, &c.

Fast Fourier Transform of data: obtaining I(Q,T)

Fitting a function

Calculate the Diffractogram starting from S(2θ,ω)

Calculate and Evaluate S(Q,ω)

Calculate the Susceptibility and DOS

Basic operations to make your life easier when using FRIDA1

Generating a function

Manipulating the postscript file made with gp

All about scripting, including a program to generate scripts for temperature ramps

Some Basic Relations in Neutron Scattering

That is not an extensive document about all the possible relationships in neutron scattering, the relationships are written here, as the users need them…

  • From meV to frequency: 1meV=240GHz
  • Resolution function with = maximum accesible time τ(ps)=0.658/Res(meV)
  • Wavelength of Thermal Neutrons: 1.8Å
  • Bose Factor 1/(exp(h·f/kBT)-1). If h·f=E(meV), then the Boltzmann constant kB = 0.08617373 meV/K
  • If you get ω from the quasielastic line, plotted as a function of Q2, the slope is the diffusion coeficient in meV·Å2. To get it in 10-4 cm2/s, multiply it by 1.519
  • To calculate the susceptibility from s(q,w): chi''=s(q,w)*hw/(KbT)