FEE for Muon System (Range System) Status & Plans G.Alexeev on behalf of Dubna group Turin, 16 June, 2009

Status : * Basic elements of ‘on chamber’ FE electronics : - 8-channel amplifier Ampl-8.3 -> NIM, A 462 (2001) channel discriminator Disc-8.3 -> NIM, A 423 (1999) channel FE board ADB-32 -> NIM, A 473 (2001) 269 * Performance of above FE was proven in experiments : - Forward Muon System of D0/FNAL (50’000 channels) - Muon Wall 1 of COMPASS/CERN (8’500 channels) - Straw tracker of Thermolization/IHEP/Protvino (10’000 channels) * FE electronic R&D units developed and tested on stand with MDTs : - QTC-16, charge-to-time converter (for analog r/o, 16 channels) - A2QTC-16, QTC-16 with double cascade of Ampl A2-16, double cascade of Ampl-8.3, 16 channels - A2DB-32, universal analog/digital unit, 32 channels (to be tested) * Estimated number of FEE channels in PANDA Muon System : - Digital y/n : 32’000/wires + 50’000/strips = 82’000/total - Analog : pending R&D with large prototypes

PANDA Target Spectrometer 2600 MDTs Dipole RICH µ - Filter 700 MDTs FRS 900 MDTs ECAL Muon and Hadron Detection in PANDA by Range System TOTAL : about 4200 MDTs

Mini Drift Tube ( MDT ) module HV connector Gas connector 8 wire connectors

26 September 2006G. Alexeev DLNP, JINR muons 0.5 GeV1.0 GeV Monte Carlo generated events with Geant 4: 1x1x1 m 3 Range System 17x17 cm 2 beam spot Beam particles – red Secondaries - green Beam

26 September 2006G. Alexeev DLNP, JINR pions 0.5 GeV1 GeV

Pion/muon separation in RS at 0.8 GeV

Stand alone (no ECal) FRS response to hadrons Analog signal “Digital” signal (hits) Better than analog mode!

Test stand : different types of MDTs and FE electronics MDT module Ampl- 8.3 QTC part

An artistic view of tested MDTs G10 board, 4 strips, 1cm wide each 4 layers, 4 strips on each layer

Track reconstruction with 1cm x 8 cm strips  Tracks are near vertical and close to the center  σ ≈ 0.5 mm

Wire and strip signals Signals after the AMPL-8.3 on 50 Ohm load Single eventAveraged

Strip Signal Amplification Card (A2-16) Ampl 8.3 fro m MD T Trace 1: Anode signal, K≈60 mV/μA Trace 2: Strip signal, inverted, K≈480 mV/μA A2-16 card (two cascade Ampl-8.3 with 16 analog outputs). To Amplitude Analysis Amplifiers AMPL-8.3

26 September 2006G. Alexeev DLNP, JINR Proposal for the analog R/O of the MDT signals of the PANDA MUON TRACKER QTC Signal AMPL. TDC (F1) Serial data Interface ` Analog R/O for MDT (strips &/or pads) Using well known Wilkinson principle for Charge-to-Time Conversion Using F1 TDC chip as proven solution for pipe-line R/O THR in THR out TIME I in I out Q

Analog switch V discharge QIntegrator Comparator OUT Comparator IN THR out THR in 1 0 discharge completed Charge time circuit integration completed Conversion time F1-TDC card from Amplifier QTC block diagram

QTC analog input Voltage on integrator QTC digital output to TDC

QTC calibration for different rates (dead times) ~ 1.5 μs ~ 1.0 μs

26 September 2006G. Alexeev DLNP, JINR QTC card (16 channels) Calibration curve

ADB-16 (preamp) QTC, version 2

MDT signals analog R/O of the PANDA MUON TRACKER QTC TDC Signal Serial data Interface ` Analog R/O for MDT (strips &/or pads) Using well known Wilkinson principle for Charge-to-Time Conversion Using TDC chip as proven solution for pipe-line R/O THR in THR out TIME I out Q 16ch I in Ampl 8.3 AA-QTC card 16 ch

A2DB-32 Board * double cascade amplification (0,1-10 uA input signals +/-, Ampl-8.3) * 32 channels analog output +/- (>=50 Ohm load ) * 32 channels logic output (ECL, LVDS – Disc-8.3)

Full scale RS prototype (2m x 4m) for 2 nd coordinate strip R/O (manufactured, pending for r/o electronics) 45 short MDTs (360 wire r/o channels, maximum) 24 long MDTs (192 wire r/o channels, maximum) 4 m long strips, 1 cm width (192 strip r/o channels) 2 m long strips,1 cm width (360 strip r/o channels)

1530 mm 1000 mm 1060 mm RS prototype for beam test Fe volume ~ 1 m3 ( ~ 8 t ), 288 MDTs 1 m long 2000 channels of wire r/o channels of strip r/o

Plans for 2009 * Equip the full scale prototype with FE electronics for wire and strip r/o * Design and manufacture preamp board for strip r/o (based on Ampl-8.3) * Assemble and test A2DB-32 unit on stand with MDTs and full scale prototype at CERN * Develop r/o scheme for the RS (1 m 3 ) prototype based on experience gained with full scale prototype

Answers to I.Konorov’s QUIZ FEE : Detector performance : * Signal amplitude, expected noise A: 1-10 uA for wire signal and 0,1-1 uA for strip signal, expected noise is negligible for wires (just cosmic rate) and is expected the same for strips (but R&D with large prototypes required) * Time resolution A: for planned gas mixture (Ar:Co2=70:30) max.drift time ~ 250 ns gives a scale of “MDT’s time jitter” * Hit rate/channel. Distribution over detector A: hit rate/channel (occupancy) is small, mostly events are generated in Forward Spectrometer (FRS in case of Muon System) ; exact answer is pending the results of R&D and MC FEE : * front-end chip, ADC/TDC amplifier Ampl discriminator Disc-8.3; no ADC/any TDC (LVDS input, 32 channels)

* FEE partitioning and location in the spectrometer, radiation conditions ADB-32 boards (ampl+disc card, 32 channels) are located on the periphery of iron absorber (exact location still to be agreed with GSI); no special ‘rad.hard’ requirements – proposed fee has passed radiation test at muon systems (D0/FNAL, COMPASS/CERN)