The pictures below show oscilloscope traces for gas mixture 50/50 Ar/CO2.
new preamp and new cable (baseline adjusted), 1900V.
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old preamp and old cable, 1900V.
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new preamp and old cable, 1900V.
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The following were obtained with increased anode voltages.
55Fe source
new preamp, 55Fe, 50/50 Ar/CO2, 2100V
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new preamp, 55Fe, 50/50 Ar/CO2, 2100V (as left, for longer)
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old preamp, 55Fe, 50/50 Ar/CO2, 2100V
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old preamp, 55Fe, 50/50 Ar/CO2, 2100V (as left, for longer)
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Cosmic rays
new preamp, cosmic rays, 50/50 Ar/CO2, 2100V
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new preamp, cosmic rays, 50/50 Ar/CO2, 2100V (as left, for longer)
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old preamp, cosmic rays, 50/50 Ar/CO2, 2100V
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old preamp, cosmic rays, 50/50 Ar/CO2, 2100V (as left, for longer)
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new preamp with 50/50 Ar/CO2, 2200V blue: ch15 (source above this), yellow: ch16 (neighbor)
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