The XA region of the Cygnus Loop is a bright knot of X-ray emission on the eastern edge of the supernova remnant .
The emission results from the interaction of the supernova blast wave with density enhancements at the edge of a precursor formed cavity .
However , this interaction is complex given the irregular morphology of the cavity wall .
To study the nature and origin of the X-ray emission we use high spatial resolution images from Chandra .
We extract spectra from these images to analyze the physical conditions of the plasma .
Our goal is to probe the density of various regions to form a picture of the cavity wall and characterize the interaction between this supernova and the local interstellar medium .
We find that a series of regions along the edge of the X-ray emission appears to trace out the location of the cavity wall .
The best fit plasma models result in two temperature component equilibrium models for each region .
The low temperature components have densities that are an order of magnitude higher than the high temperature components .
The high density plasma may exist in the cavity wall where it equilibrates rapidly and cools efficiently .
The low density plasma is interior to the enhancement and heated further by a reverse shock from the wall .
Calculations of shock velocities and timescales since shock heating are consistent with this interpretation .
Furthermore , we find a bright knot of emission indicative of a discrete interaction of the blast wave with a high density cloud in the cavity wall with a size scale \sim 0.1 pc .
Aside from this , other extractions made interior to the X-ray edge are confused by line of sight projection of various components .
Some of these regions show evidence of detecting the cavity wall but their location makes the interpretation difficult .
In general , the softer plasmas are well fit at temperatures \langle kT \rangle \sim 0.11 keV , with harder plasmas at temperatures of \langle kT \rangle \sim 0.27 keV .
All regions displayed consistent metal depletions most notably in N , O , and Ne at an average of 0.54 , 0.55 , and 0.36 times solar , respectively .