Difference between revisions of "CDC tracked cosmics"

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At 1950V, 50/50 gas:
 
At 1950V, 50/50 gas:
  
Amplitude spectra for channel 7, to set the threshold = pedestal-mean + n * pedestal-width.  First, n=10.
+
Tracked cosmics - amplitude spectra for channel 7.  In software, threshold = pedestal-mean + n * pedestal-width.  n=10.
  
 
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Zoom in on old preamp, cosmics, 50/50 Ar/CO2, 1950V
+
Zoom in on first pic (old preamp, n=10)
Old preamp, n=10
+
 
 
{| border="1" cellpadding="2"
 
{| border="1" cellpadding="2"
 
|width="415pt"|[[Image:cosmic_amplitude_1950V_old_preamp_expanded.jpg|thumb|none|400px|old preamp, cosmics, 50/50 Ar/CO2, 1950V, scale expanded]]
 
|width="415pt"|[[Image:cosmic_amplitude_1950V_old_preamp_expanded.jpg|thumb|none|400px|old preamp, cosmics, 50/50 Ar/CO2, 1950V, scale expanded]]
 
|}
 
|}

Revision as of 13:32, 18 June 2010

At 1950V, 50/50 gas:

Tracked cosmics - amplitude spectra for channel 7. In software, threshold = pedestal-mean + n * pedestal-width. n=10.


Old preamp, n=10

old preamp, cosmics, 50/50 Ar/CO2, 1950V
old preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees

New preamp, n=10, ADC range halved (scale doubled)

new preamp, cosmics, 50/50 Ar/CO2, 1950V
new preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees


Zoom in on first pic (old preamp, n=10)

old preamp, cosmics, 50/50 Ar/CO2, 1950V, scale expanded