1 / 22

Electronics part of AHCAL calibration system

Electronics part of AHCAL calibration system. ECFA meeting at Warszawa. Proposal for calibration system. Fast LED driver is needed for fast photodetectors… A tunable calibration light in the range 0 to 100MIP

noel
Download Presentation

Electronics part of AHCAL calibration system

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. Electronics part of AHCAL calibration system ECFA meeting at Warszawa Ivo Polak, IPASCR, Prague

  2. Proposal for calibration system • Fast LED driver is needed for fast photodetectors… • A tunable calibration light in the range 0 to 100MIP • Simplification of the optical system: one LED -> one side emitting fibre, one row of scintillator tiles • See Jara’s talk Optical part of AHCAL calibrator Ivo Polak, IPASCR, Prague

  3. Two scenarios of calibration system for EUDET AHCAL • Side emitting fiber for one raw, QRLed driver sitting on the side of module (endcap) • QRLed driver is sitting at HBU above the scintillator Ivo Polak, IPASCR, Prague

  4. Side emitting fiber version 24 fibers QR driver + LED 24*3cm² area needed at the main PCB Ivo Polak, IPASCR, Prague

  5. Scenario with QRLed driver by scintillator • One LED, one QRLed driver at HBU • Signals needed: • T-calib • V-calib (single ended) • power +12V QRLed driver will be placed here around This figure is been used by Riccardo Fabbri’s talk Ivo Polak, IPASCR, Prague

  6. Electrical block diagram of the Calibrator LED1 +12V QRLED 1 Power regulator • Optical taps • - notches • drops • # of elements compensate exp attenuation T-calib V-calib LED24 QRLED 24 Ivo Polak, IPASCR, Prague

  7. QR LED driver, basic parameters • Fixed pulse width 2 ÷ 10 ns • LED is an integral part of QR driver • Cosine waveform reduces elmag. x-talk • PCB footprint 2 ÷ 3 cm² • Easy power-pulsing Ivo Polak, IPASCR, Prague

  8. PIN PD response to UVLED LED current 1V => 1A PIN Ivo Polak, IPASCR, Prague

  9. Principal schema of QRLed driver A LED A Ivo Polak, IPASCR, Prague

  10. Toroidal inductors, ~ 30nH All inductors has Non-magnetic core No sensitivity to external mag. field L1 L2 L3 Ivo Polak, IPASCR, Prague

  11. Toroidal inductors - parameters Ivo Polak, IPASCR, Prague

  12. Toroidal inductor soldered Ivo Polak, IPASCR, Prague

  13. Toroidal inductor soldered See thickness of PCB and inductor Ivo Polak, IPASCR, Prague

  14. LED current • Max amplitude 1A Ivo Polak, IPASCR, Prague

  15. LED current zoomed 1A peak 2ns/div Ivo Polak, IPASCR, Prague

  16. Linearity test - preliminary Ivo Polak, IPASCR, Prague

  17. Conclusion • Inductor has been changed from loop to toroidal structure • better magnetic isolation • 2 scenarios for calibration system • QRLed driver at HEB (endcap)  fibers needed • QRLed driver in detector on HBU  no fibers • At the next HCAL DESY meeting we would like to start the discussion about the integration • It is a part of the EUDET task Multichannel LED calibration prototype Ivo Polak, IPASCR, Prague

  18. Backup slides Ivo Polak, IPASCR, Prague

  19. LED current • View of the LED pulse for a middle amplitude (1.0 A) • Measured with 1GHz voltage differential probe and 1GHz scope TDS4104 at 1Ω smd resistor • 4ns/div 0.5A/div Ivo Polak, IPASCR, Prague

  20. In wider time scale PIN Ivo Polak, IPASCR, Prague

  21. Ivo Polak, IPASCR, Prague

  22. In wider time scale,increase of the amplitude PIN 2mV/div Ivo Polak, IPASCR, Prague

More Related