1 / 20

The PrimEx HyCal Calorimeter

The PrimEx HyCal Calorimeter. Outline HyCal calorimeter PbW0 4 detectors Resolutions Transition region. A. Gasparian NC A&T State University, Greensboro, NC. 1. The PrimEx HyCal Calorimeter. 1152 PbWO4 individual crystal detectors (70 x 70 cm 2 insertion).

toki
Download Presentation

The PrimEx HyCal Calorimeter

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. The PrimEx HyCal Calorimeter Outline • HyCal calorimeter • PbW04 detectors • Resolutions • Transition region A. Gasparian NC A&T State University, Greensboro, NC GlueX Col meeting, A. Gasparian 1

  2. The PrimEx HyCal Calorimeter • 1152 PbWO4 individual crystal detectors (70 x 70 cm2 insertion) • 576 Lead Glass detectors GlueX Col meeting, A. Gasparian

  3. The HYCAL Calorimeter (Crystal part) GlueX Col meeting, A. Gasparian

  4. PbWO4 Crystal Dimensions • Tolerances (mm): • 20.5 + 0.0 - 0.1 • 180.0 + 0.3 -0.0 • Geometrical size: • 20.5 x 20.5 x 180.0 mm3 • Specified • Measured A. Gasparian

  5. PbWO4: Optical Properties A. Gasparian

  6. PbWO4: Position Resolution vs. Energy • Detector characteristics and resolution have been done in different ways: • with secondary electron beam (PS in Hall B); • with low intensity tagged photon beam (Hall B tagger) σ =2.7 mm @ 1. GeV

  7. PbWO4: Position Resolution vs. impact coordinate

  8. Lead-Glass: Position Resolutionvs. Energy σ =5.6 mm @ 1. GeV

  9. PbWO4: Energy Resolution vs. Energy σ =2.45% @ 1. GeV

  10. Lead-Glass: Energy Resolution vs. Energy σ =5.7% @ 1. GeV

  11. Transition Region: PbWO4 - Lead-Glass

  12. Transition Region: PbWO4 - Lead-GlassReconstructed Coordinate

  13. Transition Region: PbWO4 - Lead-GlassReconstructed Coordinate (Eγ = 5.2 GeV)

  14. Transition Region: PbWO4 - Lead-GlassPosition Resolution (Eγ = 5.2 GeV)

  15. Transition Region: PbWO4 - Lead-GlassReconstructed Energy (Eγ = 5.2 GeV)

  16. Transition Region: PbWO4 - Lead-GlassEnergy Resolution (Eγ = 5.2 GeV)

  17. Sensitivity to Magnetic Field • The current design do not have extended µ-metal on photocathode • Try to shield the FCAL frame with some µ-metal, if it is all possible Possible modifications: • change the G10 housing to sift ion housing and extend it to ~1” • insert optical extension • extend the brass strips (look at different options first) No need to change the optical wrapping GlueX Col meeting, A. Gasparian

  18. Summary • TheHybrid Calorimeter concept have been successfully reapproved with the HyCal calorimeter in the PrimEx experiment. • Technical and methodical aspects of the Hybrid calorimeter are well understood and tested. On-site expertise is available. • HyCal is equipped with ~2000 channel power supply (CAEN) unit; Trigger and analog electronics are old. • 1152 PbWO4 high resolution, radiation hard crystal detectors are available for future experiments. • HyCal will stay in Hall B up to the end of PrimEx-II experiment. GlueX Col meeting, A. Gasparian

  19. The End A. Gasparian GlueX Col meeting, A. Gasparian 19

  20. Invariant Mass Resolution PbWO4 only Pb-Glass only

More Related