Difference between revisions of "CDC tracked cosmics"
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|width="415pt"|[[Image:cosmic_amplitude_1950V_new_preamp_thr6.jpg|thumb|none|400px|new preamp, cosmics, 50/50 Ar/CO2, 1950V, n=6]] | |width="415pt"|[[Image:cosmic_amplitude_1950V_new_preamp_thr6.jpg|thumb|none|400px|new preamp, cosmics, 50/50 Ar/CO2, 1950V, n=6]] | ||
|width="415pt"|[[Image:cosmic_amplitude_1950V_new_preamp_45deg_thr6.jpg|thumb|none|400px|new preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=6]] | |width="415pt"|[[Image:cosmic_amplitude_1950V_new_preamp_45deg_thr6.jpg|thumb|none|400px|new preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=6]] | ||
| + | |} | ||
| + | |||
| + | Conclude that n=8 works best for the old preamp (tilted)<br> | ||
| + | <hr> | ||
| + | <br> | ||
| + | Energy spectra for n=8<br> | ||
| + | Old preamp | ||
| + | {| border="1" cellpadding="2" | ||
| + | |width="415pt"|[[Image:cosmic_energy_1950V_old_preamp_thr8.jpg|thumb|none|400px|old preamp, cosmics, 50/50 Ar/CO2, 1950V, n=8]] | ||
| + | |width="415pt"|[[Image:cosmic_energy_1950V_old_preamp_45deg_thr8.jpg|thumb|none|400px|old preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=8]] | ||
| + | |} | ||
| + | New preamp, ADC range halved | ||
| + | {| border="1" cellpadding="2" | ||
| + | |width="415pt"|[[Image:cosmic_energy_1950V_new_preamp_thr8.jpg|thumb|none|400px|new preamp, cosmics, 50/50 Ar/CO2, 1950V, n=8]] | ||
| + | |width="415pt"|[[Image:cosmic_energy_1950V_new_preamp_45deg_thr8.jpg|thumb|none|400px|new preamp, cosmics, 50/50 Ar/CO2, 1950V, 45 degrees, n=8]] | ||
|} | |} | ||
Revision as of 16:47, 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
New preamp, n=10, ADC range halved (scale doubled)
Zoom in on first pic (old preamp, n=10)
Repeat with n=8
Old preamp, n=8
New preamp, n=8, ADC range halved (scale doubled)
Repeat with n=6
Old preamp, n=6
New preamp, n=6, ADC range halved (scale doubled)
Conclude that n=8 works best for the old preamp (tilted)
Energy spectra for n=8
Old preamp
New preamp, ADC range halved
