Difference between revisions of "New fADC with cosmics"

Revision as of 15:49, 11 April 2011

• 50/50 mixed Ar, CO₂
• Recalibrated MFCs
• Outer plenum added to CDC prototype to prevent leaks
• New preamp
• New HVB

Below: Cosmics, 2050V, max amplitude histograms, new fADC with unmodified HVB (left), with modified HVB (center) and Struck fADCs with modified HVB (right), same straw for each.
NB different x axis scale, full scale is 4096 for both ADCs.

Max amplitude histo for cosmics, new fADC, unmodified HVB, mixed 50/50 at 60 sccm 2050V

Max amplitude histo for cosmics, new fADC, modified HVB, mixed 50/50 at 60 sccm 2050V

Max amplitude histo for cosmics, Struck fADCs, modified HVB, mixed 50/50 at 60 sccm, 2050V

Below: Cosmics, 2050V, drift time - untracked, new fADC (left) and Struck fADCs (right), same straw for both.

New fADC cosmics drift time (untracked), mixed 50/50 at 60 sccm 2050V

Struck fADCs cosmics drift time (untracked), mixed 50/50 at 60 sccm, 2050V

Below: Cosmics, 2050V, drift radius fit residuals (radius of fitted track - radius interpolated from Garfield drift time calcs)
New fADC with unmodified HVB (left), with modified HVB (center) and Struck fADCs with modified HVB (right), same straw for each.

Drift radius fit residuals, new fADC, unmodified HVB, mixed 50/50 at 60 sccm 2050V

Drift radius fit residuals, new fADC, modified HVB, mixed 50/50 at 60 sccm 2050V

Drift radius fit residuals, Struck fADCs, modified HVB, mixed 50/50 at 60 sccm, 2050V