Difference between revisions of "CDC tracked cosmics"

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|width="415pt"|[[Image:cosmic_amplitude_1950V_new_preamp_thr8.jpg|thumb|none|400px|new preamp, cosmics, 50/50 Ar/CO2, 1950V, n=8]]
 
|width="415pt"|[[Image:cosmic_amplitude_1950V_new_preamp_thr8.jpg|thumb|none|400px|new preamp, cosmics, 50/50 Ar/CO2, 1950V, n=8]]
 
|width="415pt"|[[Image:cosmic_amplitude_1950V_new_preamp_45deg_thr8.jpg|thumb|none|400px|new preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=8]]
 
|width="415pt"|[[Image:cosmic_amplitude_1950V_new_preamp_45deg_thr8.jpg|thumb|none|400px|new preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=8]]
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Repeat with n=6<br>
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Old preamp, n=6
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{| border="1" cellpadding="2"
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|width="415pt"|[[Image:cosmic_amplitude_1950V_old_preamp_thr6.jpg|thumb|none|400px|old preamp, cosmics, 50/50 Ar/CO2, 1950V, n=6]]
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|width="415pt"|[[Image:cosmic_amplitude_1950V_old_preamp_45deg_thr6.jpg|thumb|none|400px|old preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=6]]
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|}
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New preamp, n=6, ADC range halved (scale doubled)
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{| border="1" cellpadding="2"
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|width="415pt"|[[Image:cosmic_amplitude_1950V_new_preamp_thr8.jpg|thumb|none|400px|new preamp, cosmics, 50/50 Ar/CO2, 1950V, n=6]]
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|width="415pt"|[[Image:cosmic_amplitude_1950V_new_preamp_45deg_thr8.jpg|thumb|none|400px|new preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=6]]
 
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Revision as of 16:04, 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. Chamber is horizontal (left) and then tilted at 45 degrees (right).


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


Repeat with n=8
Old preamp, n=8

old preamp, cosmics, 50/50 Ar/CO2, 1950V, n=8
old preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=8

New preamp, n=8, ADC range halved (scale doubled)

new preamp, cosmics, 50/50 Ar/CO2, 1950V, n=8
new preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=8


Repeat with n=6
Old preamp, n=6

old preamp, cosmics, 50/50 Ar/CO2, 1950V, n=6
old preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=6

New preamp, n=6, ADC range halved (scale doubled)

new preamp, cosmics, 50/50 Ar/CO2, 1950V, n=6
new preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=6