The focus is at the apex of the cone formed by the tapped coil. Since the photons does not collapse at the surface of the coils as they are guided to the focus, only the detector at the focus need to adjust for \(\theta_s\) mentioned in the post "Hubble, Huba, Huba" dated 17 Jan 2018.
As board-spectrum X ray is expected to penetrate differently, \(-\Delta t\) varies for different bands of X rays. There cannot be one adjustment to \(\theta_s\) across the spectrum. A layered detector, that enables a composite image along a range of \(\theta_s\) using post image processing is shown below,
All collapsed photons from a narrow band of X rays will impact along the red line defined by \(\theta_s\) across fine layers of detection medium. A composite image of that band of X rays is formed by picking all the pixels that lie on the red line.
\(\theta_s\) is defined by the movement of the detector during \(\Delta t\) after a torus photon collapses at the detector. \(\Delta t\) is the duration the collapsed photon travels back in time from a future position.
Good night.
Note: An example of a positive temperature particle carrying current, hot water.
