Newest preamp

• 50/50 mixed Ar, CO₂
• Recalibrated MFCs
• Outer plenum added to CDC prototype to prevent leaks
• New modified HVB
• 2050V
• Comparison of modified preamp (preamp4 with terminating resistors removed) and its predecessor (preamp4)

Below: cosmics with new fADC, preamp4 (left) and newest modified preamp (right) Blue histograms are tracked hits, runtimes were not equal. The fADC range is 4096.

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

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

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

Earlier new fADC results are on this page: New_fADC_with_cosmics

Below: 55Fe spectra with preamp 4 and Struck ADCs set to half-range, 550mV

Max amplitude histo, 55Fe, 2050V, Struck fADC range 550mV

Max amplitude histo (x-axis expanded), 55Fe, 2050V, Struck fADC range 550mV

Integrated, 96ns, 55Fe, 2050V, Struck fADC range 550mV

Below: 55Fe spectra with newest preamp (preamp4 minus terminating resistors) and Struck ADCs set to full-range, 1.1V

Max amplitude histo, 55Fe, 2050V, Struck fADC range 1.1V

Max amplitude histo (x-axis expanded), 55Fe, 2050V, Struck fADC range 1.1V

Integrated, 96ns, 55Fe, 2050V, Struck fADC range 1.1V