The pictures below show oscilloscope traces for gas mixture 50/50 Ar/CO2, all are shaper output.
Preamp 4 is described in GlueX-doc-1364, table 2, row 2; Preamp 3 is described in row 1.
2000V, 55Fe source
 preamp 4, 55Fe, 50/50 Ar/CO2, 2000V |
 new preamp, 55Fe, 50/50 Ar/CO2, 2000V |
 old preamp, 55Fe, 50/50 Ar/CO2, 2000V |
2000V, Cosmic rays
 preamp 4, cosmic rays, 50/50 Ar/CO2, 2000V |
 new preamp, cosmic rays, 50/50 Ar/CO2, 2000V |
 old preamp, cosmic rays, 50/50 Ar/CO2, 2000V |
2100V, 55Fe source
 preamp 4, 55Fe, 50/50 Ar/CO2, 2100V |
 new preamp, 55Fe, 50/50 Ar/CO2, 2100V |
 old preamp, 55Fe, 50/50 Ar/CO2, 2100V |
As above, for longer
 preamp 4, 55Fe, 50/50 Ar/CO2, 2100V |
 new preamp, 55Fe, 50/50 Ar/CO2, 2100V |
 old preamp, 55Fe, 50/50 Ar/CO2, 2100V |
2100V, Cosmic rays
 preamp 4, cosmic rays, 50/50 Ar/CO2, 2100V |
 new preamp, cosmic rays, 50/50 Ar/CO2, 2100V |
 old preamp, cosmic rays, 50/50 Ar/CO2, 2100V |
As above, for longer
 preamp 4, cosmic rays, 50/50 Ar/CO2, 2100V |
 new preamp, cosmic rays, 50/50 Ar/CO2, 2100V |
 old preamp, cosmic rays, 50/50 Ar/CO2, 2100V |
2200V, 55Fe source
 preamp 4, 55Fe, 50/50 Ar/CO2, 2100V |
As above, for longer
 preamp 4, 55Fe, 50/50 Ar/CO2, 2100V |
2200V, Cosmic rays
 preamp 4, cosmic rays, 50/50 Ar/CO2, 2100V |
As above, for longer
 preamp 4, cosmic rays, 50/50 Ar/CO2, 2100V |
