1 / 15

Photodetectors for Tile-HCAL prototyp e

Photodetectors for Tile-HCAL prototyp e. Only APD ( FZU= APD+RF-Preampli) I-V and C-V characteristics LED response of APD and of PMT measurement of S8550 matrix and single APD 1/G*dG/dT , 1/G*dG/dV – compare E1 to 3x3 16ch Preampli PCB and single APDs Conclusions. APD + Preampli.

amish
Download Presentation

Photodetectors for Tile-HCAL prototyp e

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. Photodetectors for Tile-HCAL prototype • Only APD ( FZU= APD+RF-Preampli) • I-V and C-V characteristics • LED response of APD and of PMT measurement of S8550 matrix and single APD • 1/G*dG/dT, 1/G*dG/dV – compare E1 to 3x3 • 16ch Preampli PCB and single APDs • Conclusions S. Němeček: Photodetectors for Tile-HCAL prototype

  2. APD + Preampli S. Němeček: Photodetectors for Tile-HCAL prototype

  3. Beam test DESY Aug02 pixel E1 corrected HV bias 385.5V corrected HV bias 387.5V S. Němeček: Photodetectors for Tile-HCAL prototype

  4. Thanks to ATLAS-Praha, ID-pixels group S. Němeček: Photodetectors for Tile-HCAL prototype

  5. Thanks to ATLAS-Praha, ID-pixels group: KEITHLEYK237 HV/ I Source-Measurement, Agilent (HP) 4284A LC-meter, 10 kHz S. Němeček: Photodetectors for Tile-HCAL prototype

  6. QE(PM) = 10% QE(APD) = 80% Green light 520nm Checked by fibres swap APD + Preampli 24*Npe PM Npe Measurement Setup <Q > =Np.e. *Gain * e- Npe = <QPM>2 / sPM 2 GPM = sPM 2 / (e- *<QPM> ) GAP = <QAP> / (e- *24*Npe) GAP = (<QAP> /(e-*24)) * sPM 2 / <QPM> 2 GAP = (<QAP> / (24* <QPM>)) * GPM QPM σPM, Nγ LED QAPσAP 3*Nγ S. Němeček: Photodetectors for Tile-HCAL prototype

  7. S/N = 6.7 S/N = 8.6 S. Němeček: Photodetectors for Tile-HCAL prototype

  8. +2.5% -2.5% S. Němeček: Photodetectors for Tile-HCAL prototype

  9. F = difference of APD noise from one expected based on Poissonian statistics <QAP> 2 / ( sAP 2 - sAPNoise 2) = No / F sAPNoise … measured as pedestal width (LED off) No = 24*Npe ( APD value calculated from PMT one) S. Němeček: Photodetectors for Tile-HCAL prototype

  10. Measured Results MAPD =GAP / ( 20 * 100) S. Němeček: Photodetectors for Tile-HCAL prototype

  11. Gain dependence on temperature S. Němeček: Photodetectors for Tile-HCAL prototype

  12. Gain dependence on voltage S. Němeček: Photodetectors for Tile-HCAL prototype

  13. Gain dep. on U, compare E1 to 3x3 Pixel E1 Single APD 3x3 mm2 S. Němeček: Photodetectors for Tile-HCAL prototype

  14. PCB 16 ch. Preampli (FZU) S. Němeček: Photodetectors for Tile-HCAL prototype

  15. 4. Conclusions • I-V and C-V characteristics were measured for single APD3x3mm2 • Gain and Excess Noise Factor F were calculated from simultaneous measurement of APD and PMT response to LED • Ratio APD/PMT response within ±2.5% • F = ~4 for single APD, better than F= ~8 for matrix (pixel E1) • Gain dependence on temperature 1/G*dG/dT = ~12% at maximal gain of E1 pixel of matrix APD (measured in range 11 to 26 °C) • Gain dependence on voltage 1/G*dG/dV is again better for single APD, 15% at maximal gain • Power supply with ΔV/V=1.E-4 gives 1% of Gain stability • Possibility of voltage-temperature regulator is under study • A prototype of PCB of 16 channels preamplifier was produced • Adaptor to single APD (instead of matrix) is under way S. Němeček: Photodetectors for Tile-HCAL prototype

More Related