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TRT Resolution |
This page documents the TRT resolution under various conditions:
Resolution quoted is a gaussian fit to +/- 0.3 mm of the residual distribution for the given type of tracks.
Uncertianties are at the sub micron level
All tracks are from CombinedInDet_CTB
All tracks selections require >45 TRT hits, pT > 3 GeV, and the events phase between 5 and 30 ns.
In addition combined tracks require > 9 SCT and > 2 Pix, and the D0 cut is less than 100 mm (inside pixel volume)
The following is wrt Si alignment InDet_Cosmic_2008, with 5 golden B-Field On runs, in release (-tag=15.0.1.6,AtlasTier0) with the "old" event phase calculation.
Alignment tag TRT_Cosmics_2008_06 (5 DoF combined tracks) Run 91888 and 91900 (IndetTrkErrorScaling_nominal)
| Track Collection |
Both (microns) |
A-Side (microns) |
C-Side (microns) |
| Combined Tracks |
180 |
175 |
184 |
| TRT Only |
184 |
182 |
187 |
| TRT Only D0 Cut |
185 |
182 |
189 |
Alignment tag TRT_Cosmics_2008_06 (5 DoF combined tracks) Run 91888 and 91900 (IndetTrkErrorScaling-002-00)
| Track Collection |
Both (microns) |
A-Side (microns) |
C-Side (microns) |
| Combined Tracks |
181 |
176 |
185 |
| TRT Only |
185 |
182 |
187 |
| TRT Only D0 Cut |
185 |
182 |
188 |
After TRT L2 Alignment wrt InDetCosmics_2008_05 (3 DoF trtonly tracks) Run 92057 (IndetTrkErrorScaling_nominal)
| Track Collection |
Both (microns) |
A-Side (microns) |
C-Side (microns) |
| Combined Tracks |
206 |
205 |
207 |
| TRT Only |
197 |
195 |
199 |
| TRT Only D0 Cut |
200 |
199 |
201 |
The following is wrt Si alignment InDet_Cosmic_2008, with 5 golden B-Field On runs, in release (-tag=15.0.0) with the "old" event phase calculation.
Alignment tag TRT_Cosmics_2008_06 (5 DoF combined tracks)
| Track Collection |
Both (microns) |
A-Side (microns) |
C-Side (microns) |
| Combined Tracks |
187 |
183 |
191 |
| TRT Only |
186 |
183 |
188 |
| TRT Only D0 Cut |
188 |
185 |
191 |
Same with New Event Phase calculation and corrisponding calib constants in April
| Track Collection |
Both (microns) |
A-Side (microns) |
C-Side (microns) |
| Combined Tracks |
189 |
189 |
188 |
| TRT Only |
182 |
183 |
182 |
| TRT Only D0 Cut |
189 |
188 |
189 |
The following is wrt Si alignment InDet_Cosmic_2008, with only run 91900 (B-Field)
Alignment tag *NOT IN DB* (3 DoF combined tracks)
| Track Collection |
Both (microns) |
A-Side (microns) |
C-Side (microns) |
| Combined Tracks |
190 |
186 |
195 |
| TRT Only |
191 |
189 |
194 |
| TRT Only D0 Cut |
193 |
191 |
196 |
Alignment tag TRT_Cosmics_2008_07 (3 DoF TRT Only)
| Track Collection |
Both (microns) |
A-Side (microns) |
C-Side (microns) |
| Combined Tracks |
191 |
186 |
196 |
| TRT Only |
191 |
188 |
194 |
| TRT Only D0 Cut |
193 |
191 |
195 |
Alignment tag TRT_Cosmics_2008_08 (3 DoF TRT Only A-Side Only)
| Track Collection |
Both (microns) |
A-Side (microns) |
C-Side (microns) |
| Combined Tracks |
N/A |
191 |
N/A |
| TRT Only |
N/A |
188 |
N/A |
| TRT Only D0 Cut |
N/A |
197 |
N/A |
Alignment tag TRT_Cosmics_2008_09 (3 DoF TRT Only C-Side Only)
| Track Collection |
Both (microns) |
A-Side (microns) |
C-Side (microns) |
| Combined Tracks |
N/A |
N/A |
193 |
| TRT Only |
N/A |
N/A |
190 |
| TRT Only D0 Cut |
N/A |
N/A |
192 |
Wrt Si alignment from 25 Feb the run is 91900 (B-Field On)
Alignment tag *Not In DB* (5 DoF Combined tracks)
| Track Collection |
Both (microns) |
A-Side (microns) |
C-Side (microns) |
| Combined Tracks |
191 |
186 |
196 |
| TRT Only |
192 |
189 |
194 |
| TRT Only D0 Cut |
193 |
190 |
196 |
Wrt Si alignment from 25 Feb the run is 92057 (B-Field Off)
Alignment tag *Not In DB* (5 DoF Combined tracks)
| Track Collection |
Both (microns) |
A-Side (microns) |
C-Side (microns) |
| Combined Tracks |
205 |
202 |
208 |
| TRT Only |
199 |
196 |
201 |
| TRT Only D0 Cut |
202 |
201 |
204 |