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D. Attié , P. Colas, E. Delagnes, M. Riallot M. Dixit, J.-P. Martin,

Power pulsing of AFTER in magnetic field. D. Attié , P. Colas, E. Delagnes, M. Riallot M. Dixit, J.-P. Martin, S. Bhattacharya , S. Mukhopadhyay. Linear Collider Power Distribution & Pulsing Workshop May 10th, 2011. Introduction. Proposal:

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D. Attié , P. Colas, E. Delagnes, M. Riallot M. Dixit, J.-P. Martin,

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  1. Power pulsing of AFTER in magnetic field D. Attié, P. Colas, E. Delagnes, M. Riallot M. Dixit, J.-P. Martin, S. Bhattacharya , S. Mukhopadhyay Linear Collider Power Distribution & Pulsing Workshop May 10th, 2011

  2. Introduction • Proposal: • Use existing electronics and adapt it for power pulsing to read out the detector pads: • Integrated T2K electronics • Having a two power states: low and nominal • Switching between state as fast as possible • In parallel, use constant current charging circuits to readout the detector mesh (see J.-P. Martin’s talk) • Using an 55Fe source to monitor the signal and gain • Operating in 5T magnet in DESY May 10, 2011 - LC Power Distribution and Pulsing Workshop

  3. AFTER-basedelectronics • 1 FEM, 6 FECs, 24 chips :1728 ch • 12-bit ADC, 6 channels multiplexed • Zero Suppression capability (FPGA) • ~14-25 mW/channel • AFTER chip (72 channels/chip) from T2K experiment: • low-noise (700 e-) pre-amplifier-shaper • full wave sampling by SCA (511 time bins) • 120 fC to 600 fC tunable gain • 100 ns to 2 μs tunable peaking time • pulser for calibration • 25 W, 5V at 5 A (0,5 W/chip) AFTER chip wire bonded FEC May 10, 2011 - LC Power Distribution and Pulsing Workshop

  4. Front-End Mezzanine (FEM) 30 pins connector 30 pins connector 30 pins connector 30 pins connector 30 pins connector 30 pins connector AFTER SRAM ADC Xilinx Prom FPGA Xilinx V5 Optical connector Test Pulser 30 pins connector 30 pins connector 30 pins connector 30 pins connector 30 pins connector 30 pins connector May 10, 2011 - LC Power Distribution and Pulsing Workshop

  5. Design of the integratedelectronics May 10, 2011 - LC Power Distribution and Pulsing Workshop

  6. Electronics in DESY 1T magnet • Picture and events taken last week in DESY with electron beam • 1726 pads read out by the AFTER-based electronics • Power consumption of 25W was measured and confirmed Large prototype TPC 3 GeV electron Beam May 10, 2011 - LC Power Distribution and Pulsing Workshop

  7. Project design • DESY 5T magnet has to be reinstalled • Endplate ø 32 cm • Field cage length not yet defined • 1 FEM and 4 FEC to readout 1136 pads of 3,7×3,7mm² E B May 10, 2011 - LC Power Distribution and Pulsing Workshop

  8. Readout Pads 16 independent HV connections read out by constant current charging system May 10, 2011 - LC Power Distribution and Pulsing Workshop

  9. Low power state conditions • Specific firmware of the for the FPGA Xilink 5 will be done • Switch on and off the regulator TPS70402 for powering 3.3 V: t<1 ms May 10, 2011 - LC Power Distribution and Pulsing Workshop

  10. Summary of the plan • Try power switching on both the (segmented) mesh readout as studied by Jean-Pierre Martin (see the next talk) and the T2K electronics • For T2K electronics, power switching might be done on the mezzanine card (FEM) developed for the 7-module configuration of the Large Prototype Micromegas TPC • The test will consist in checking the properties of known X-ray lines with and without pulsing • The mechanical effects will be studied by having a large enough number of channels (1200) and a large magnetic field (5T) close to realistic conditions May 10, 2011 - LC Power Distribution and Pulsing Workshop

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