1 / 30

SPACIROC Spatial Photomultiplier Array Counting and Integrating ReadOut Chip

SPACIROC Spatial Photomultiplier Array Counting and Integrating ReadOut Chip. S. Ahmad, P. Barrillon , S. Blin , S. Dagoret , F. Dulucq , C. de La Taille IN2P3-OMEGA LAL Orsay , France Y. Kawasaki - RIKEN,Japan I. Hirokazu – JAXA, Japan. Main application: JEM-EUSO.

moswen
Download Presentation

SPACIROC Spatial Photomultiplier Array Counting and Integrating ReadOut Chip

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. SPACIROCSpatial PhotomultiplierArrayCounting and IntegratingReadOut Chip S. Ahmad, P. Barrillon, S. Blin, S. Dagoret, F. Dulucq, C. de La Taille IN2P3-OMEGA LAL Orsay, France Y. Kawasaki - RIKEN,Japan I. Hirokazu – JAXA, Japan

  2. Main application: JEM-EUSO • EUSO-BALLOON : • Project CNES + IRAP (Toulouse), APC and LAL supported by the whole JEM-EUSO collaboration • 1 PDM with electronics and mechanics as close as possible to the one of JEM-EUSO • SPACIROC : Mapmt readout • Goals: • Launch in 2014 • Technological demonstrator (PDM + software) • Study of the background • Detection of an atmospheric shower JEM-EUSO : • Extremely High Energy Cosmic Ray (EECR) observer onboard of International Space Station • Observing Extensive Air Shower created by the EECRs • Total irradiation dose: 60 krad/5years • Launch in 2016 TWEPP 2012, Oxford

  3. Front End ASIC requirements • 64 channels photon counting • Single photon counting 100% trigger efficiency: 1/3 pe (~50 fC when MaPMT gain=106) • Double pulse resolution : ~10 ns • => 3 different designs are embedded • Charges to Time (Q-to-T) converters (based on KI02 ASIC – JAXA/RIKEN) • 8 channels: each for 8-pixel sum preamplifier signals • Pixels charge measurement: 2pC – 200pC • Data acquisition & Readout to be done within 2.5 µs (GTU) • Readout Clock : 40MHz • Radiation Hardness By Design : TMR (Triple Module Redundancy) • Power budget : <1 mW/channel TWEPP 2012, Oxford

  4. Global architecture TWEPP 2012, Oxford

  5. Photon Counting - Architecture • 3 designs: Trig_PA: output directly from preamplifier → lowest dissipation • Trig_FSU : unipolar fast shaper → baseline • Trig_VFS : new optimised fast triggering shaper → fastest design • Multiplexed Trigger to Digital part • 2 x 10-bit DAC for threshold • Turn off all blocks. TWEPP 2012, Oxford

  6. Q to T: Architecture • Time Over Threshold technique • based on a block designed by JAXA/RIKEN (called KI) • 8 channels: Each channel input is the sum of 8 consecutive preamplifier outputs • 10-bit DACs for threshold TWEPP 2012, Oxford

  7. Digital Architecture • 8 identical digital module for Photon Counting => 8 clocking counters • 1 digital module for Q to T converters => 8 enable 40MHz counters • 9 serial links for data readout + TransmitOn signal Photon Counting Q to T conversion TWEPP 2012, Oxford

  8. SPACIROC1 Technology: AMS 0.35µm SiGe Submitted in March 2010 Delivered: Mid-July Test: September Dimensions : 4.6mm x 4.1mm (19 mm²) Power supply: 0-3V Naked Die: 1700 chips Packaging : CQFP240 (proto) CQFP160 (Euso-balloon production): - 100 asics (yield: 85%) 4.6mm 4.1mm TWEPP 2012, Oxford 8

  9. SPACIROC1: Trigger efficiency measurements • Photon Counting: • TrigFSU (Baseline) • Gain = 1mV/fC • Min input = 30 fC • Dispersion: 2.5 DAC unit • Trig_PA • Gain = 0.32mV/fC • Min input = 30 fC • Dispersion: 1.8 DAC unit • Trig_VFS • Gain = 1.3mV/fC • Min input = 60 fC • Dispersion: 17.7 DAC unit Trig_PA : 64 Channel Scurves Trig_FSU : 64 Channel Scurves Trig_VFS : 64 Channel Scurves TWEPP 2012, Oxford

  10. SPACIROC1: Charge measurements 100 • Charge to Time converter • 8-pixel-sum: Input test: 1.6 – 160 pC • Simulation: charge up to 250pC • Measurements: saturation starts at 40pC KI 8-Pixel-Sum Simulations 250pC 65 KI 8-Pixel-Sum Measurements 160pC • ASIC Digital System: • Startbit, Data, TransmissionOn, Parity Bit • Data output Vhi-Vlo: 1.5V - 0V TWEPP 2012, Oxford

  11. SPACIROC1 + MAPMT measurements Test setup: HVPS: K=1000V & Cockroft Walton MAPMT: Hamamatsu R11265-M64 MAPMT Gain: 1.106 (1p.e=0.16pC) DC LED : λ=378nm Photo Counting and Q to T counter data for input range of 1-180 p.e/GTU/pixel Photoelectron spectrum Photon Counting pile up: 25pe/GTU/pixel Q to T range:6.4 -198 pC TWEPP 2012, Oxford

  12. SPACIROC1: Measurement summary • SPACIROC1 bugs • Power consumption: • Due to design bugs, unused component can’t be turned off. • Double pulse separation: • 10ns is never reached (due to the power dissipation) • Q to T converter: 8-pixel-sum • Linearity zone is 75% smaller than simulations • Integrated signal swing is 0.7V instead of 1.5V • Good behaviour for first prototype • Good baseline for Photon Counting • Slow Control cells & Digital modules working as expected • Will be used for EUSO-Balloon (CQFP160) TWEPP 2012, Oxford

  13. SPACIROC2 • Technology: AMS 0.35µm SiGe • Submitted in November 2011 • Delivered in February 2012 • Dimensions : 4.6mm x 4.6mm (21 mm2) • Power supply: 0-3V • Packaging: CQFP208 (proto) • Modifications: • Trig_pa: add buffer • Trig vfs: add turn off switch • improve the discriminator • Q to T converter: integrated capacitor values changed • add a reset TWEPP 2012, Oxford

  14. SPACIROC2: FSU Measurements: 64 channels FSU pedestals FSU 50fC Average Threshold = 67.8 DAC (1.119V); RMS = 0.8 DAC (~1.3mV) Average Threshold = 92.3 DAC (1.06V); RMS = 2.3 DAC (~3.8mV) • Large gap between the pedestals and 1/3 pe • → we can easily trig on 1/3 pe • Nice uniformity between channels (rms: 2.3DAC) TWEPP 2012, Oxford

  15. SPACIROC2: PA Measurements: 64 channels • 50fC trigger requirement matched for all channels • (nice separation from pedestals) • Nice uniformity between channels ( rms: 1DAC) PA pedestals Average Threshold = 963.7 DAC (2.497V); RMS = 0.8 DAC (~1.3mV) PA 50fC Average Threshold = 954.6 DAC ( 2.483V); RMS = 1 DAC (~1.65mV) TWEPP 2012, Oxford

  16. SPACIROC2: VFS Measurements: 64 channels • 50fC trigger requirement matched for all channels • (nice separation from pedestals) • Nice uniformity between channels ( rms: 3.5DAC) VFS 50fC VFS pedestals Average Threshold =81.44DAC (1.042V); RMS = 0.67 DAC (~1.1mV) Average Threshold = 112.25 DAC (1.093V); RMS = 3.48 DAC (~5.7mV) TWEPP 2012, Oxford

  17. SPACIROC2: FSU Measurement – Ch32 Gain = 1.23 mV/fC Min Input = 20fC (<<1/3pe) 5sNoise = 7fC TWEPP 2012, Oxford

  18. SPACIROC2: PA Measurement – Ch32 Gain = 0.563 mV/fC Min Input = 38fC (<<1/3pe) 5sNoise = 7.5fC TWEPP 2012, Oxford

  19. SPACIROC2: VFS Measurement – Ch32 Gain = 1.18mV/fC Min Input = 20fC (<<1/3pe) 5sNoise = 8fC TWEPP 2012, Oxford

  20. Double pulse separation FSU: 26 ns DAC value: 100 Injection=1pe * 2 Double pulse separation=26ns PA : 28ns DAC value: 950 Injection=1pe * 2 Double pulse separation=28.5ns VFS: 20ns DAC value: 120 Injection=1pe * 2 Double pulse separation=20ns TWEPP 2012, Oxford

  21. Q to T(8-Pixel-Sum) - Linearity Discri output Discri input Poor linearity Not a problem for our application Only used to detect high signal => turn off the mapmt HV TWEPP 2012, Oxford

  22. Measurement summary Almosteverything has been improved TWEPP 2012, Oxford

  23. Conclusion • The best trigger design will be chosen by the collaboration • Spaciroc1 : demonstrator • Spaciroc2 : JEM-EUSO • Eliminate all power consumption problems • Improve double pulse separation • All trigger designs can be used TWEPP 2012, Oxford

  24. TWEPP 2012, Oxford

  25. SPACIROC1: Mapmt measurements Photon Counting KI Test setup: HVPS: K=1000V & Cockroft Walton MAPMT: Hamamatsu R11265-M64 MAPMT Gain: 1.106 (1p.e=0.16pC) DC LED : λ=378nm Photon Countingpileup:30p.e KI range:6.4 -198 pC TWEPP 2012, Oxford

  26. Photon Counting – Simulations • Triggers for 80 fC input charge (1/2 pe for PMT gain =106) Trig_FSU Vth=1.2v Δt<10ns Trig_PA Vth=2.35v Δt<5ns Trig_VFS Vth=1.2v Δt<5ns TWEPP 2012, Oxford

  27. Digital part waveform • GTU : 99% duty cycle synchronised to Readout clock falling edge • Each DataOut serial link: 66-bit data (StartBit + Counters Data + ParityBit) • TransmitOn signal active during data transmission on DataOut links TWEPP 2012, Oxford

  28. Photon Counting – Simulations • Triggers for 160 fC input charge (1 pe for PMT gain =106) Trig_FSU Vth=1.2v Δt<10ns Trig_PA Vth=2.35v Δt<15ns Trig_VFS Vth=1.2v Δt<5ns TWEPP 2012, Oxford

  29. KI 8-Pixel-Sum – Simulations • Input : 2.4pC – 240pC 2.4pC 11pC 52pC 240pC TWEPP 2012, Oxford

  30. Q to T (8-Pixel-Sum) - Architecture Dt=25.15ns Discri output 201ns, 287ns,397ns, 509ns,608ns Ddata_ki=1 Dt=48.3ns Ddata_ki=2 Discri input Dt=59.8ns Ddata_ki=3 Dt=72.59ns Ddata_ki=4 TWEPP 2012, Oxford

More Related