D Belver FEE for Trasgos

The Front-End Electronics of the HADES timing RPCs wall. Daniel Belver Fernández LabCAF-University of Santiago de Compostela

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],OUTLINE

The RPC Front-End Electronics (FEE) t 1 t 2 FEE-DBOs (108 DBOs/sector x6) FEE-MBOs (16 MBOs/sector x6) Mechanical support board, providing power supply, test signal and threshold DAQs. Amplifying and timing discrimination board (QtoW algorithm).

FEE and DAQ system 4 MBOs/TRB 8 DBOs/MBO 4 cells/DBO 4 TRB/sector 2 LV/sector See M. Traxler talk Trigger ∑ Front-End MBO DBO RPC signals RPC signals RPC cells DC-DC converter Commercial power supply Low voltage system 5 3.3 -5 5V,-5V,3.3V 48V Ethernet TRB Data acquisition system

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],DaughterBOard (DBO) All SMT available components (R & C 0402 size) SAMTEC connector (40 pins, 0.8 mm pitch) Area=5x4.5 cm 2 1 3 2 4 Width ~charge (QtoW) Arrival time LVDS

TI OPA690 amp integrates the amplified signal (QtoW algorithm) PHILIPS BGM1013 amp (35.5 dB at 1 GHz) Protected by PHILIPS BAV199 2-diodes RPC cell One DBO channel: analog stage Analog stage Digital stage Amplified RPC signal Integrated signal

MAX9601 dual PECL discriminator: LE used for cut/shape the output pulse TI SN65LVDS100 PECL-LVDS converter PHILIPS BFT92 PNP wideband (5 GHz) transistor for multiplicity trigger sum One DBO channel: digital stage Analog stage Digital stage Discriminator output Latch Enable (LE) Latch Enable/ (LE/)

MotherBOard (MBO) ,[object Object],[object Object],Area 40x6 cm 2 Area 16.5x6.5 cm 2

[object Object],[object Object],[object Object],[object Object],[object Object],MBO schematic

FEE performances: time resolution Q=V max x e -t/R in C R in C>>t r Q=C x V σ t(FEE+TRB) <40 ps/ch ToF threshold=-20mV σ t(FEE) < 17 ps/ch (Q>90 fC)

[object Object],FEE performances: QtoW calibration Streamer region Avalanche region

In-beam results QtoW spectrums for one cell ToF threshold=-50 mV σ t =76 ps 3σ tails=2.2%

Summary of the FEE performances

[object Object],FEE adaptation to TRASGO Possible FEE positions Cut view of the TRASGO DBOs placed over one MBO TRB between RPC planes

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Power consumption ≈120 W per TRB FEE improvements for TRASGO Easy for the power supply but not for solar panels.

D Belver FEE for Trasgos

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