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Detector PCB design Front-end electronics Cables for nBLMs

Detector PCB design Front-end electronics Cables for nBLMs. Ph. Legou (CEA/Saclay/IRFU) For the Saclay nBLM ESS group. Design of the detector PCB. SMA Connectors. The 4-layers PCB Strips, spacers and the mesh are sticked on the PCB by a single process. Active Area.

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Detector PCB design Front-end electronics Cables for nBLMs

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  1. Detector PCB design Front-end electronicsCables for nBLMs Ph. Legou (CEA/Saclay/IRFU) For the Saclay nBLM ESS group CEA | Le Ponant 21 novembre 2017

  2. Design of the detector PCB SMA Connectors The 4-layers PCB Strips, spacers and the mesh are sticked on the PCB by a single process. Active Area • Detector: • EMC « design » • Signal integrityfromstrip to preamplifier  crosstalk  adaptation pb Fastsignalscapability HT AREA SHV Connectors HV Protection SHV Connectors Manufactured at CERN CEA | Le Ponant 21 novembre 2017

  3. Front end module Front end electronics for nBLM prototype FAMMAS front-end module ( Fast Amplifier Module for MicromegasApplicationS) • Few figures: • Power supply : + / - 5V • Consumption 50 mW • Input : positive or negative • Noise : 600µV rms • Rise time :<1ns • Gain : 33dB • Size : 22x20x5 mm • Weight : 6g CEA | Le Ponant 21 novembre 2017

  4. Signal rise time / Cable length • Test conditions: • Pulsegenerator : Lecroy 9210 • Oscilloscope Tektronix DPO 4104B Output pulse rise time = f(input pulse rise time) For differentcablelength Pulse rise time : 1ns CEA | Le Ponant 21 novembre 2017

  5. Test with a source in lab with a 50m cable Short cable Long cable (50 m) • In both case good signal / noise ratio • No crosstalk • Individual neutron detection • Ready for test beams CEA | Le Ponant 21 novembre 2017

  6. ESS nBLM signals cable We plan to use an extra shield around coaxial cables to increase the shielding • Cablecaracteristics : • LowAttenuation • Complete Shielding • Good shielding • Halogene Free CEA | Le Ponant 21 novembre 2017

  7. Extra shielding Difficulties to find connectors for triaxial cables (see Edvard talk) • Extra shield: • Good and completeshielding (metalbraidedscreen) • Ground connection from external shielding • Signal coaxial cable AIFIRA - CNRS Same approach for low voltage cables 3C2OSHF CEA | Le Ponant 21 novembre 2017

  8. New Front end board Toward the detector Mezzanine Board  Easier maintenance Preamplifier Preamplifier Preamplifier Preamplifier Front End Board Size  10 x 6 cm Output : SMA Connectors  Buffer : even if we have low Attenuation cables (rise time – 50m cable) Buffer Buffer Mezzanine board Toward LCF38-50J coaxial cable -> Digitizer Boards IOxOS FMC ADC 3111 CEA | Le Ponant 21 novembre 2017

  9. New Front end board #2 Toward the detector Preamplifier Preamplifier Front End mezzanine Board Size  10 x 6 cm Output : SMA Connectors Buffer : even if we have low Attenuation cables (rise time – 50m cable) Buffer Buffer 7 janvier 2020 Toward LCF38-50J coaxial cable -> Digitizer Boards CEA | Le Ponant 21 novembre 2017

  10. New low voltage harness have been manufactured in saclay. • A low voltage filtering box isready for birmingham and Linac 4 tests beams. • Reflexions on patch panels are in progress : • Patch panel -> detectors (tunel) • Patch panel -> crates (surface) • Test of new front end boards (january) CEA | Le Ponant 21 novembre 2017

  11. Thank you ! CEA | Le Ponant 21 novembre 2017

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