CMB temperature power spectrum (toy)

What you are seeing: the angular power spectrum $D_\ell = \ell(\ell+1)C_\ell/2\pi$ of CMB temperature fluctuations. The first acoustic peak at $\ell \sim 220$ measures the geometry; peak ratios constrain $\Omega_b$ ; the damping tail measures Silk damping. Toy model only.

Figure 1. Toy CMB power spectrum with adjustable parameters.

l_peak1220

l_damp2000

WHAT TO TRY

Vary each control and watch the rail readouts respond.
Compare the diagnostic plot against the live scene.