Photomultipliers data

ADC and TAC distributions

Sets of plots below contain ADC and TAC spectra from the Roman Pot trigger counters, as they were in the sample of reconstructed elastic proton-proton scattering events (sqrt{s} = 200 GeV). Five datasets were used to prepare histograms: 0, 1, 4, 6, 9 (see numeration here).

One should take into account, that TAC spectra are sensitive to the time-space structure of colliding bunches (that's the reason why many "bumps" are presents in the distributions). Also, TAC spectra from Roman Pots were biased due to "TAC cut-off" (sharp right edge - loss of early events). Sets of points around TAC ~ 100 also results from the cut-off.

The PDF versions of the plots are listed at the bottom of the page.

 ADC          TAC