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LED notched fibre distributing system QMB1 with HBU2 test

Ivo Pol á k, on behalf of Prague’s group polaki@fzu.cz QMB1 specifications Test with HBU2 Analysis of light fibre distribution Notched fibre, semiautomatic machine Conclusions. LED notched fibre distributing system QMB1 with HBU2 test. QMB1.

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LED notched fibre distributing system QMB1 with HBU2 test

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  1. Ivo Polák, on behalf of Prague’s group polaki@fzu.cz QMB1 specifications Test with HBU2 Analysis of light fibre distribution Notched fibre, semiautomatic machine Conclusions LED notched fibre distributing systemQMB1 with HBU2 test Ivo Polák, FZU, Prague

  2. QMB1 More info of QMB can be found at previous presentations: http://www-hep2.fzu.cz/calice/files/20110915-Polak_I.CALICE_Heidelberg.pdf • Quasi resonant Main Board • Modular system, 1 LED per board • Operation mode: • DAQ + CANbus control • stand-alone mode • LVDS Trigger distribution system • Variable amplitude, zero to maximum (~1Amp) smooth • Pulse width fixed to ~ 3.5ns (UV or blue LED) • Voltages and temperature monitoring • Size of PCB: width 30mm, depth 140mm Single power 15V 65mA Ivo Polák, FZU, Prague

  3. Frame with 5 QMB1 boards (and 1 spare) Ivo Polák, FZU, Prague

  4. DESY test setup in February 2012 HBU2 SPIROC2 Notched fibres Single layer frame PWR 15V DIF, PWR, CAL QMB1 QMB1 QMB1 QMB1 combiner CANbus T-calib from DAQ- DIF Ivo Polák, FZU, Prague

  5. Setup with HBU2 SiPM bias has not been set individually • HBU2 (two SPIRoc2b ASICs) equipped with 3 rows of scintillators with SiPMs (delivered in Nov2011) • 3 active QMB1s 3mm UV LED (395nm) 3x QMB1 Bad channels Ivo Polák, FZU, Prague

  6. detail of routed fibres • We used TESA highly adhesive pads (for installation of banner to the wall) It is more stable than other temporary technique. • We are developing stable fixing system. Fixing fibres to the right position is like Match of Ferda the ant with Bag the beetle… Ivo Polák, FZU, Prague

  7. Test at DESY • HBU2 (two SPIRoc2b ASICs) equipped with 3 rows of scintillators & SiPMs (delivered in Nov2011) • At DESY 2012 FEB 15 - 21 • Low Gain • High Gain • Linearity & Amplitude scan • Single photon electron spectra • Analysis mainly done by Jiří Kvasnička • Fast Fourier Transform of p.e. spectra to get the peak distance • Thanks to Mathias Reinecke with effort to set up HBU2 Ivo Polák, FZU, Prague

  8. Amplitude scan LG • 2nd row (notched fibre) 12 channels • Recalculated from SPIROC ADC bins to SiPM pixels and LED linearity measurement (see next slide) Ivo Polák, FZU, Prague

  9. QMB1 linearity, amplitude scan Standard LED pulses 3ns, PWR measured by optical power meter ThorLabsPM100D Differential Nonlinearity Ivo Polák, FZU, Prague

  10. HG - SPeS 3 rows of notched fibres • squares indicates bad channels (SiPM, sci, or SpiRoc2b channel) • 10 bad (unusable) channels of 36 ( = 28%) • Nov2011 SiPM tiles are different to 2010 tiles, seems to get worse spectra QMB1s Two best p.e. spectra of 2011SiPM batch HBU2 Ivo Polák, FZU, Prague

  11. Reminder: nice spectra 2010 Single p.e. spectra QMB6 to SPIROC1 & SPIROC0 different SiPMs in the 2010 and 2011 batches Spread of SiPM gain is about factor 3, it corresponds to data from ITEP. Ivo Polák, FZU, Prague

  12. Result of FFT on best 2011 SiPM p.e. spectra Best spectra of 2011 SiPM • FFT can see deep in Signal to Noise ratio Ivo Polák, FZU, Prague

  13. Result of FFT on bad2011 SiPM p.e. spectra Ivo Polák, FZU, Prague

  14. Conclusions • QMB1 is in full operational stage • It is working, no major troubles occurred • First 6 boards (version 1) we have in hand • fw is finished, QMB1 communicate via CANbus with PC • LabView exe file can control the board • November2011 batch of SiPM has worse parameters in p.e.spectra over older batch • Upgrade of QMB1(v2.0) is foreseen in mid of 2012 • FFT is successfully applied on p.e. spectra to extract SiPM gain • Notched fibre semiautomatic machine is hw ready, its sw is under development, in April new set of fibres to test at DESY Ivo Polák, FZU, Prague

  15. Back-up slides Ivo Polák, FZU, Prague

  16. 2nd row Correction to fibre data (Smolda) Ivo Polák, FZU, Prague

  17. HG - SPeS 3 rows of notched fibres • ellipsoids indicates bad channels (SiPM, sci, or SpiRoc2b channel) • 10 bad (unusable) channels of 36 ( = 28%) • Nov2011 SiPM tiles are different to 2010 tiles, seems to get worse spectra QMB1s • We see decrease of response! • Partially due to wrong orientation of fibre HBU2 Ivo Polák, FZU, Prague

  18. Quick Friday’s QMB1 test with HBU2 System is working! , butBig spread due to combination of factors: Bad fibre, hold scan did not matched 2011 • Some config troubles occurred • Generally, system is working easily, run in stand-alone mode • Pulse position at different LEDs can be easy tuned within 1ns • Near future plans (tomorrow) • Hold scan • Better notched fibre to install • Single p.e. peak spectra • Next year plan (February) • More channels equipped with scintillators • Xtalk and light spread study Distribution will be better, do not worry! Ivo Polák, FZU, Prague

  19. Principal schema Larger inductor than the older QMB6 Ivo Polák, FZU, Prague

  20. PIN-PD response to QMB1 flash PIN-PD only, no preamp 5ns/div Upper: PIN-PD w preamp 10ns/div Lower: PIN-PD w preamp 50ns/div Maximal LED amplitude, LED airgap to PIN-PD Ivo Polák, FZU, Prague

  21. Mechanical layout of QMB1 LED Outer line: 30 (29) x 140 mm^2 4 mounting holes for M2.5 screw Ivo Polák, FZU, Prague

  22. Notched fibres illuminated by Green laser 24 notches • external company Safibra preparing the setup (semiautomat) to produce precise notches in the fibres • We assume to have fibres made by new technology in 1.Q 2012, we assume less spread of the light at taps (<15% ). • prototype fibres showed some systematic error (decay) in distribution of light, two test methodes  two results: flat and with decay. Under investigation now. Ivo Polák, FZU, Prague

  23. Notched fibresSemi-automatic tool Now in operational debugging & sw development stage Alu/PCB Template with moving scint tile Frame with x-y stepper motors Drill machine used as milling cutter to groove the notch PCB with 3mm holes Scintilator tile w SiPM Ivo Polák, FZU, Prague

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