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Planes instrumented with APD’s for 1m 3 PPT –HCAL-CALICE

Planes instrumented with APD’s for 1m 3 PPT –HCAL-CALICE. J.Cvach, M.Janata, I.Pol ák, J.Weichert,, J.Zálešák, Š.Valkár, J.Žáček IOP-ASCR and IPN P –C U, Prague. Energ y resolution with APDs. Good linearity, small systematic deviation in the slope (beam not in the tile centre?)

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Planes instrumented with APD’s for 1m 3 PPT –HCAL-CALICE

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  1. Planes instrumented with APD’s for 1m3PPT –HCAL-CALICE J.Cvach, M.Janata, I.Polák, J.Weichert,, J.Zálešák, Š.Valkár, J.Žáček IOP-ASCR and IPNP–CU, Prague Š. Valkár: APDs for 1m3

  2. Energy resolution with APDs • Good linearity, small systematic deviation in the slope (beam not in the tile centre?) • No estimate of systematic error yet • Energy resolution comparison: Fit values for PM APD MC P1 0.1 ± 0.2 0.5 0.4 ± 0.2 P2(%) 21.0 ± 0.4 24.4 17.1± 0.1 SiPM values similar to PM values • reasons for worse resolution: • noise of APD • lower tile light yield (estimate: 17 ph.e./tile) • tile alignment ( alignment with beam) • calibration Š. Valkár: APDs for 1m3

  3. Solution • APD, (APDg) tested with (3) preamps and best available scintillation tiles + WLS fibers. • Insensitive to high magnetic fields • Available Tile + WLS systems and arrangements for: • 1 APD in each tile • 3 Tiles on 1 APD Š. Valkár: APDs for 1m3

  4. Material for 3 tile sizes 30 x 30mm - 900 tiles (30x30)/1m2 (x3) = 2700 tiles for 3 planes - 900 APDscintillating fibres – 2070mcalibration fibres – 2070m60 x 60mm - 225 tiles (15x15)/1m2 (x3) = 675 tiles for 3 planes – 225 APDscintillating fibres – 550mcalibration fibres – 550m120 x 120mm - 64 tiles (8x8)/1m2 (x3) = 192 tiles for 3 planes – 64 APDscintillating fibres – 160mcalibration fibres – 160m Š. Valkár: APDs for 1m3

  5. Plane 1m2 instrumented with 60x60mm tiles Š. Valkár: APDs for 1m3

  6. Detail of one row Š. Valkár: APDs for 1m3

  7. Front view of absorbers and cassettes Š. Valkár: APDs for 1m3

  8. Side view of 3 planes with light tight box Š. Valkár: APDs for 1m3

  9. Side view + detail of mask for APD Š. Valkár: APDs for 1m3

  10. Top view and side view of groves for WLS Š. Valkár: APDs for 1m3

  11. 3D – view of tiles and reflection 3M foils Š. Valkár: APDs for 1m3

  12. Four tiles equipped with four APDs readout by one preamp - board Š. Valkár: APDs for 1m3

  13. Different geometries for WLS fibers Š. Valkár: APDs for 1m3

  14. Different geometries for WLS fibers Š. Valkár: APDs for 1m3

  15. Conclusions • Tested APD (Hamamatsu S 8864-55) show good performance – similar to PMT and SiPM. • We are looking for the cheap APD or APDg (1mm2) Suitable for the light detection from single tile. (See Preprint 11-03, ITEP, 2003.) • For the tested (3mm2) APD’s we prepared design for ‘Tile + WLS + APD’ instrumentation for 3 consecutive planes. Š. Valkár: APDs for 1m3

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  18. Š. Valkár: APDs for 1m3

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