Update resources/Detectors/densities/CCM/CCM-v2.dat

Co-authored-by: Austin Schneider <[email protected]>

resources/Detectors/densities/CCM/CCM-v2.dat

@@ -78,6 +78,8 @@ object cylinder  23 0 -0.65          0 0 0      1.20 0 2.30    ccm_outer_argon
 # approximating the frame as a continuous thin cylinder with approximately same total mass as the struts
 object cylinder  23 0 -0.65          0 0 0      1.130076 0 1.24261    ccm_pmt_frame       ALUMINUM constant    2.70
 # Inner argon
+# The "inner argon" represents argon within the radius of the PMT support struts (inner frame) but is distinct from the "active volume" of argon
+# A thin reflective TPB-coated film of radius 1.03385m separates the veto region from the active volume, and is not represented here because of its minimal contribution to the detector mass
 object cylinder  23 0 -0.65          0 0 0      1.12776 0 1.2396   ccm_inner_argon     ARGON    constant    1.3954
 
 detector 23 0 -0.65