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FNAL beam test results

FNAL beam test results. A. Zhang, V. Bhopatkar, M. Phipps, J. Twigger , M. Hohlmann HEP Group A, Florida Tech 12/16/2013. Beam profiles from reference detectors. 1st ref. #2 (10cm). 2nd ref. #3 (10cm). 3rd ref. #4 (50cm). 4th ref. #1 (10cm, FIT).

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FNAL beam test results

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  1. FNAL beam test results A. Zhang, V. Bhopatkar, M. Phipps, J. Twigger, M. Hohlmann HEP Group A, Florida Tech 12/16/2013

  2. Beam profiles from reference detectors 1st ref. #2 (10cm) 2nd ref. #3 (10cm) 3rd ref. #4 (50cm) 4th ref. #1 (10cm, FIT) Applied a coarse alignment: shift the reference detectors to the beam center by subtracting the mean value of the cluster position distribution.

  3. X,Y correlations of reference detectors The correlation band from the upstream ref. detectors is quite narrow, and the band becomes a little wider for the downstream ref. detectors.

  4. Some 3d tracks Y [mm] X [mm] Z [mm] 5 tracks The solid dots have same color are one track that goes through the four ref. detectors. Most of the tracks have 3 points in a good line.

  5. Tracks in y-z plane The same alignments are used to EIC ZZ and 10cm ZZ detectors.

  6. More tracks from ref. detectors • Cut: positions in y axis are between -1.0 and +1.0 mm • The beam size in X direction is ~30mm, much wider than ~1.5mm in Y. This is consistent with our previous results. • The beam is parallel in X-Z projection, while looks has angles in Y-Z projection.

  7. Residual distribution of EIC ZZ detector The sigma is obviously decreasing as HV increases! 3200V

  8. Efficiency of EIC ZZ detector on sector 5 Efficiency curve of EIC ZZ detector, on sector 5, with the coarse aligned tracking information. Cut: clusters on ref. detectors have more than 1 strips, cluster on EIC eta5 has none-zero strip. Get >97% efficiency when HV above 3200V.

  9. Summary • The first tracking results look promising, though the alignment is coarse. • Will work on fine alignment to get more precise tracks • And spatial resolutions. • Thanks!

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