Calorimeter Mu2e Development electronics Front-end Review G. Corradi S. Ceravolo D.Tagnani F.Colao giovanni.corradi@lnf.infn.it 8 november 2016

Calorimeter routing Detector Solenoid DAQ room ~7-8 m Floating LV overall cross section ~180 cm2 Floating LV +28V / negative Floating positive HV 230 V (MPPC) ground ~60-80 m overall cross section ~210 cm2 LV HV isolation OVP filter Safety Ground Detector Ground Floating Structures

Layout front-end Mezanine Board Digitizer 3V3 8V 28V, 30W Unit 1 HV_250_DC_V 40mA, 10W per unit 28_DC_V 1.15A, 32W per unit Unit 2 Unit 3 Unit 4 28 DC V 10A, 280W per 8 units common sense HV_250 DC V 320mA, 80W per 8 units common sense Unit 5 Unit 6 Unit 7 Clock Distribution Unit 8

Architecture front-end Optimization of the space in progress Cables and connectors in progress

Preamp-Regulator scheme

Electric preamplifier scheme Preamplifier_SIPM Preamplifier Shaper filter Select Gain Select Pulse Test Differential Driver Linear Regulation Electric preamplifier scheme

Simulation before end after filter

Simulation bandwidth Preamplifier Plot of the simulated transfer function, good phase margin Not forgetting that the source capacity of approximately 1nf

Simulation bandwidth after filter Plot of the simulated transfer function, after shaper filter Amplitude and phase plot with gain Vout/Vin 30

Preliminary Specifications Preamplifier Gain Vout/Vin 2 step remote control 15-30 Dynamic differential +/-1V Bandwidth 40Mhz Rise time 10ns Output impedance 100 Ω Stability with source capacity max 1nf Coupling output end source AC Noise, with source capacity 1pf --------- Power dissipation 45mW Power supply +8V Semi-gaussian shaping filter 3 pole Time after shaper 25ns Injection test pulse charging, fixed amplitude 400mV Input protection 10mJ

Linear_ Regulator Electric linear regulator scheme Linear Driver Decoder ADC 16bit Linear low Voltage section I2C line DAC 16bit Electric linear regulator scheme

Preliminary Specifications regulator Vin max 250V Current limit 2mA Dynamic regulation 5V to 200V Settling time 100us Ramp-up programmable 1ms to 100ms Ripple estimated 3mVpp Stability, theoretical value Δt 10 °C better 50 ppm Power dissipation with out load min 50 mW Power dissipation max load, worst case max 350 mW Temperature measurement -40 to 50°C Monitor current detector 50uA to 2mA Remote control I2C GND insulated from earth Ceq max 5pf Therma-Bridge to dissipate heat insulated gnd

PCB Layer TOP Preamplifier Drivers Section Filter section Preamplifier section Dimention card 58mm x 30mm

PCB Layer Bottom, Linear Regulator Output connector Analog signals Digital I2C Supply low voltage High voltage Temperature Sensor Detector Fixing hole and transfer heat Very low thermal resistance

Final Assemblay Thermal conducting Power to dissipate max 350mW Board Thermal Contact By Bridge resistor Thermal conducting Power to dissipate max 350mW Board Temperature Sensor Case (Cu) Output Connector

Mechanical front-end support Connector Output Electromagnetic shield Cooling channel Card Preamplifier_Regulator

Controller ARM first prototype Regulator 8V Buffer I2C ARM Controller Primary HV_Generator Protection fuse 28V Voltage regulator 8V ARM Controller I2C communication buffer Communication line with Digitizer High voltage distributor

Controller Arm first prototipe Rear view input output digital I2C View analog connector differential signals Connector views one-wire temperature measurement

Mezzanine card control 20 channels Front Panel view

Mezzanine card control Rear view Analog to Digital Interfaces with Digitizer

Mezzanine card control View inserted Connectors on the Front panel

Mezzanine card control Sizing connector spaces

Mezzanine card control Dimension Retail size card

Status and perspectives Preamp-regulator, completed test There are maximum dynamic problem Firmware almost completed Thermal tests to be completed Radiation resistance testing to be completed Connection cable between pre and controller we found a likely champion Project progress, primary regulator prototype 250V 350mA Project progress, primary regulator prototype 8V 1A, with active filter output. Project progress, controller ARM per 20 channels Draft of communication protocol I2C