Difference between revisions of "Resolutions"
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= Resolutions = | = Resolutions = | ||
+ | * Difference in gases: | ||
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+ | |width="415pt"|[[Image:resol7030.jpg|thumb|none|400px|Resolutions (in um) as a function of distance to the wire (in mm) for 70/30.]] | ||
+ | |width="415pt"|[[Image:resol9010.jpg|thumb|none|400px|Resolutions (in um) as a function of distance to the wire (in mm) for 90/10.]] | ||
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Revision as of 11:53, 10 July 2009
Prelude
- Two gases are used: 70/30 and 90/10 Ar/CO2
- Two fADC clock settings are used: 125 and 200 MHz
- Drift time spectra (DCOG method is used):
- Red line is fit to get absolute minimal drift time
- Best tracking results if extracted minimal drift time + 1 time sample
- Samples per rising edge - 2 extra samples 125 -> 200 MHz
- Time-2-distance relation:
- GARFIELD is used. To get best resolutions out of it:
- 68/32 Ar/CO2 is put in GARFIELD for 70/30 gas
- 89/11 Ar/CO2 is put in GARFIELD for 90/10 gas
- +-6% CO2 can give 100~ns difference
- GARFIELD is used. To get best resolutions out of it:
Resolutions
- Difference in gases: