1 / 8

Calculation of hit efficiency

Calculation of hit efficiency Yukio FUJIYAMA (Tokyo Tech) Hit efficiency study Definition Number of the intersections of tracks (RawData (cosmic) -> CDC tracking -> interpolate -> SVD tracking) with layers → denominator Coincidence of clusters in table (RecSVD_Cluster) → numerator

omer
Télécharger la présentation

Calculation of hit efficiency

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Calculation of hit efficiency Yukio FUJIYAMA (Tokyo Tech)

  2. Hit efficiency study Definition Number of the intersections of tracks (RawData (cosmic) -> CDC tracking -> interpolate -> SVD tracking) with layers →denominator Coincidence of clusters in table (RecSVD_Cluster) →numerator

  3. Flow of tracking Exp No.38,Exp No.30 interpolate My works The details are the next page…

  4. Number of hits From CDC (interpolate) Tracking on SVD(1) • Number of hits ≧ 4 • Hits mean the intersections of tracks (from CDC) with layers. • Associate hits with clusters in table (RecSVD_cluster) • Residual x , y < 0.9 cm • Residual z < 5 cm • Absolute value of cluster energy > 8000 e- • Evaluate track parameters with these clusters.

  5. Number of hits From track parameters I evaluate Tracking on SVD(2) • Number of hits > 4 • Hits mean the intersections of tracks (with the track parameters I evaluate) with layers. • Mask the layer that we wanted to know hit efficiency. • Associate hits with clusters in table (RecSVD_cluster) • Residual x, y, z < 0.07 cm • Absolute value of cluster energy > 8000 e-

  6. Hit efficiency study Analysis sample Exp No.38 run7~28 Cosmic-Ray without magnetic field, 300,000events Exp No.30 run77~128 Cosmic-Ray without magnetic field, 200,000events

  7. Hit efficiency study Residual distribution residual_exp38.ps residual_exp30.ps Cluster distribution on DSSD cluster_ditribution_exp38.ps cluster_distribution_exp30.ps

  8. Summary • Compare hit efficiency in exp38 to that in exp30. • These are consistent. • Third layer efficiency seemed to be improved. • What happened ? • There is no hole in the cluster positions. • Mupair event only have…? • Try to calculate hit efficiency with cosmic-ray with magnetic field.

More Related