## Setting energy axis

If energy axis PV has been reset, the length of the axis will need to be set again for the pipeline to run.  The energy axis needs to have the same length as the spectrometer camera width

`length = ep.caget('SATOP11-PSAS079:WIDTH')`  
`e_axis =np.arange(length)`  
`ep.caput('SATOP11-PSAS079:SPECTRUM_X',e_axis)`  