EMC Electronics and Trigger Review and Trigger Plan

EMC Electronics and Trigger Review and Trigger Plan Valerio Bocci INFN Roma EMC Electronics: INFN Roma, INFN Perugia Trigger: INFN Roma, INFN Perugia, INFN Roma 3, INFN Naples, INFN LNF

Super. B EMC Barrel : 5760 Cs. I(Tl) Crystals EMC Forward = 4400 Lyso Crystals (176 modules)

25 crystals tower readout electronics Crystals Mechanics X 5 4 X X 5 Ranges Lvds 5 VFE Board 5 Shaper Range Board PIN Or APD 5 ranges analog Coded Differential ADC Board ADC CLK I 2 c VME • 25 channel (full module readout) • All boards produced LNF General Meeting September 28, 2010 Valerio Bocci

Very Front End Board HV • EMC VFE Board • 5 CSP Channels • Enable to mount: Cremat, Hamamatsu, Home Made CSP • HV distribution CSP Buffer Diff or SE DRV CSP Buffer Diff or SE DRV LNF General Meeting September 28, 2010 Valerio Bocci

EMC Ranges shaper board X 5 Channels Analog Rcv from FE x. 5 CR 200 Signal out x 32 ADC CLK Analog Diff Output 1 bit range LVDS CR 200 Switch Logic Switch_Ctrl Cmp_stretch Thr Setting Fast Comparator Pro. Asic 3 FPGA I 2 c LNF General Meeting September 28, 2010 DAC Range info Analog Coded Valerio Bocci

Energy Resolution new ADB % Low Range Me. V Low Range % High Range Me. V % Range selected/ Me. V 1 6. 87 219. 73 6. 87 10 0. 69 21. 97 0. 69 100 0. 07 2. 20 0. 07 200 0. 03 1. 10 0. 03 300 OVF 0. 73 1000 OVF 0. 22 9000 OVF 0. 02 High Range Elba Super. B General Meeting 30 May- 5 Jume Valerio Bocci

Old ADB Energy resolution LNF XI General Meeting December 1, 2009 Valerio Bocci

As we know the noise spectrum depends from the shaping time we do not find any noise source with an heavy contribution. Power Spectrum 500 ns Shaper Power Spectrum 250 ns Shaper Power Spectrum 100 ns Shaper More noise XV Super. B General Meeting – Caltech 14 -17 December 2010 Valerio Bocci

We integrate the noise spectrum and we have evaluated the noise level in Veff • 100 ns -> 745 u. Veff(0. 5 -10. 5 MHz) • 200 ns -> 565 u. Veff (0. 5 -3. 5 MHz) • 500 ns -> 418 u. Veff (0. 1 -2. 1 MHz ) XV Super. B General Meeting – Caltech 14 -17 December 2010 Valerio Bocci

Electronics Plan • The electronics of the Forward follows the discussions of the detector and try to support the test beams. It is not fixed and strongly depends of the detector type. • After the Super. B approval we have to follow better the electronics of the Barrel where we have more fixed points. • We startup a collaboration with Roma 3, Naples, LNF Perugia, for Central trigger design.

What we are doing for BTF 2 nd LNF Test – We want to study better the response of Crystals – The electronics worked well during the CERN test beams and we understood the noise source (shaper) – We don’t want to touch to much the electronics to have more or less the same system to factorize problems. – We only adjust the amplification chain to lower energy scale of the BTF (100 Mev to 500 Mev) Valerio Bocci 2011

Range Arrangements for BTF 2

2 nd BTF beam test High Gain 1 Me. V~12. 6 m. V 380 V OR 308 V Crystal NC Low Gain 193 Me. V = 1469 ADC 1 Me. V~3. 77 m. V CSP CR 110 4. 3 V No Shaper attenuation Stage 1 VFE Shaper preamp Stage 2*0. 819 10 x Shaper + driver VME RANGE Connect 1 CMS APD • We read one APD for channel • We use two scale High Gain Low Gain changing the APD voltage • Gain 0. 6 mv/Me. V (High Gain) 0. 18 mv/Mev(Low Gain) Valerio Bocci 2011 ADC

EMC Forward Trigger Primitives • Super. B EMC Forward = 4400 Lyso Crystals • 176 Sums unit Sum of the energy deposition of the 25 crystals of each Forward module. Elba Super. B General Meeting 30 May- 5 June Valerio Bocci

EMC Barrel Trigger Primitives • EMC Barrel : 5760 Cs. I(Tl) Crystals • 480 Sums unit Sum of the energy deposition of 12 crystals of the barrel module any sample time Elba Super. B General Meeting 30 May- 5 June Valerio Bocci

EMC Fast Trigger Path and Slow Energy Path Energy Slow Path Double Range shaper CSP Range (0, 1) X Ncryst Trigger Fast Path Analog n S Pulse Encoder LVDS Trigger Tower module Valerio Bocci 2011

EMC Forward tentative of Implementation X 5 Double Range shaper CSP Range X 5 5 x 5 =25 crystal tower 5 input S VME Range Shaper VFE New Circuit Analog Sum over 5 input. Analog 5 input S Trigger Tower module Pulse Encoder LVDS X 176 lvds Links Valerio Bocci 2011

EMC Trigger Processor 44 x 4=176 tower LVDS TP 0_EMC Ntower LVDS cables Addr Addr Time Time Energy Energy Addr Active Towers (176 Lvds cables Forward EMC) DAQ Width Trigger processor level 0 Cluser Information extracted • Addr of each tower • Extract Energy. T for each tower (width measurement) • Extract T for each Tower Valerio Bocci 2011

Trigger timing in the Ba. Barrel Cs. I (Tl doped) P. D. Dauncey et Al. , “Design and performance of the level 1 calorimeter trigger for the BABAR detector” (2001) 3 thresholds applied to the signal of the tower. The plot shows the difference between the EMC trigger time and the DC trigger time. A FIR Filter with 8 parameters was applied to the signal. Its zero crossing occurred at roughly a fixed time distance from the start of the signal, it was used to gate threshold information. Due to this mechanism the time resolution was about 100 ns.

Trigger Crate TP 0_FEMC TP 0_EMC 0 TP 0_EMC 1 TP 0_EMC 2 CTP TP 0_DC 0 Central Trigger Processor The central trigger processor get the informations from the TP 0 units and create the trigger. The edge of DC chamber has the same addr structure of the EMC. Valerio Bocci 2011

There is some space in the old Dirc

Plan • For BTF FEMC test in May we need all the pieces for system integration asap. • We need a Babar Barrel Cs. I(Tl) to understand how to readout the Barrel • We setup a trigger group to define trigger strategy