Complete reconstruction of Compton scattering in Camera by measuring 3-D track of recoil electron in gas Time Projection Chamber (TPC). TPC measure the 3-D imformation of the recoil electron track, and Scintillators arrays measure the scattering gamma-ray. The blue arrowed line indicate the gamma-ray, and the read curved line is recoil electron.
“2 Angles” of incident gamma direction focus gamma rays to NOT “circles” as by conventional Compton Camera BUT “a point “ similar to Optical camera. Real data of well-defined Point Spread Function as the diagrams below indicates.
Then, ETCC provides a well-defined Point Spread Function similar to Optical Telescope. Also Strong rejection ability of all background radiations by energy loss rate of tracks in gas-TPC.
The below figue show the ARM distribution. The background events accumulate in the positive side in histogram.