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Results from previous years

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2010 Beam Spot results at 7 TeV

Two dimensional distribution in the x-z plane of primary vertices with at least 10 tracks per vertex for run 152166 at √s = 7 TeV. One can recognize a small tilt of the luminous region of 471μrad 15μrad. With the small beam spot expected at √s = 7 TeV, the width of the transverse distribution of primary vertices is dominated by the vertexing resolution of about 75μm for the selection used for this figure. First results from beam spot fits indicate a luminous size σ(x) of about 45μm with an error that is completely dominated by systematics.

data10_7TeV.00152166.express_express-DB_BEAMSPOT.f236_c103.MergeNt-nt-xz10.gif
eps version of the figure

Two dimensional distribution in the y-z plane of primary vertices with at least 10 tracks per vertex for run 152166 at √s = 7 TeV. With the small beam spot expected at √s = 7 TeV, the width of the transverse distribution of primary vertices is dominated by the vertexing resolution of about 75μm for the selection used for this figure. First results from beam spot fits indicate a luminous size σ(y) of about 70μm with an error that is completely dominated by systematics.

data10_7TeV.00152166.express_express-DB_BEAMSPOT.f236_c103.MergeNt-nt-yz10.gif
eps version of the figure

Two dimensional distribution in the transverse plane of primary vertices with at least 10 tracks per vertex for run 152166 at √s = 7 TeV. With the small beam spot expected at √s = 7 TeV, the width of the transverse distribution of primary vertices is dominated by the vertexing resolution of about 75μm for the selection used for this figure. First results from beam spot fits indicate a luminous size of about 45μm in x and 70μm in y with errors that are completely dominated by systematics.

data10_7TeV.00152166.express_express-DB_BEAMSPOT.f236_c103.MergeNt-nt-yx10.gif
eps version of the figure

Luminous centroid position in x over the course of run 152166 (LHC Fill 1005) at √s = 7 TeV. The data points shown are the results from fits to samples of 10 minutes of data. Errors are statistical only.

152166-x.gif
eps version of the figure

Luminous centroid position in y over the course of run 152166 (LHC Fill 1005) at √s = 7 TeV. The data points shown are the results from fits to samples of 10 minutes of data. Errors are statistical only.

152166-y.gif
eps version of the figure

Luminous centroid position in z over the course of run 152166 (LHC Fill 1005) at √s = 7 TeV. The data points shown are the results from fits to samples of 10 minutes of data. Errors are statistical only.

152166-z.gif
eps version of the figure

Luminous size in z over the course of run 152166 (LHC Fill 1005) at √s = 7 TeV. The data points shown are the results from fits to samples of 10 minutes of data. Errors are statistical only.

152166-sigz.gif
eps version of the figure
 

Alignment Performance with 2010 7 TeV Collisions data

 
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