July 15-17, 2008ALICE EMCal Meeting, Nantes 0 EMCal Electronics Status Terry Awes ORNL.

July 15-17, 2008ALICE EMCal Meeting, Nantes1

EMCal Electronics Status

Terry AwesORNL


Strip Module Internal Components

APD+Preamplifier, Transition Card, (LED fiber distribution), Temperature sensor

2007PrototypeModules

Transition Card


• APD: Ordered - 5000 US, 1300 Catania (Hamamatsu)– Quoted Delivery (as of June 3):

Strip Module Internal Components: Status

HPF/CERN (total 5K pcs)

HPI/INFN (total 1.3K pcs)

July 450 pcs on 7/14 450 pcs on 7/7

300 pcs on 7/28 300 pcs on 7/22

August 300 pcs on 8/25 300 pcs on 8/6

September 150 pcs on 9/22 250 pcs on 9/8

3800 pcs--> Checking


• Preamplifier: Ordered - 7000 US+EU (Gnomes Design, Japan - PHOS supplier)– Quoted Delivery (as of July 1):


Terry さんから納期短縮のご依頼　理解しました。現在　部品の納期確認作業を行っております。残念ながら　部品調達には　時間がかかります。今回の基板は　ハロゲンフリー基板を予定しています。ハロゲンフリー基板の特性上　基板製造、組立作業を全部品の入手後　今年度分を一括生産する予定です。現時点では　最速の納品でも 8月中旬以降の予定です。ご要望ん従い　出来るだけ早く納品したいと思います。もうしばらく　お待ち下さい。　納品可能な日時分かりましたらご連絡いたします。

Mr. Terry. The delivery date confirmation work of parts is being done now. To our regret, it takes time to the part procurement. This substrate schedules a halogen free substrate. After it obtains it of entire goods, current year is scheduled to be produced in the lump the substrate manufacturing on the characteristic and the assembling work of a halogen free substrate.

The delivery of goods of the velocity is a schedule now after the middle of August. I want to follow and to deliver demand as soon as possible. Please wait for a while. When the date that can be delivered is understood, I will report.


• Transition Cards: – PCBs Ordered - 820 US+EU (144 for 2 SM)

• Quoted Delivery July 4• Components ordered, most received

• Molex cables– Ordered 7000 (2304 for 2 SM)

• Expected delivery late September - Long story– Initially given 2 week delivery– Delay to receive quote due to PHOS non-payment– Delay due to non-compliance with CERN standards

(Halogen) waiting for quote with compliant halogen-free cables

– Quoted delivery now 12 weeks - due to materials?



Electronics: Testing/Calibration

• Test APD+preamplifier (Houston, Catania)– Initial APD gain vs Voltage measurements, QA

• Test FEE cards after production (CERN)– Confirm all channels have proper FADC outputs– Confirm APD bias control works properly– Measure Hi/Low amplifier channel gains

• Calibrate Super Modules (Yale, Grenoble)– Measure APD voltage-gains for each channel– Obtain pre-calibration with cosmics– Determine APD operating voltage for each channel

No special test fixtures will be built. Instead we will use EMCal FEE setups as test station(s). Test stations at:– Houston, Catania (exists) for APD+preamplifier tests– CERN (exists) for FEE/TRU/crate tests– Yale, Grenoble for SM test and calibrations


APD Test Setup

• Houston setup:– LED Driver, FEE Card, T-Cards, FEE Cables, GTL bus, RCU,

DCS, SIU, DRORC, PC, LV cables, fiber optic, ethernet+DAQ tested at CERN, now at Houston

– Chiller ordered, mechanical pieces under construction

• Completely implemented already at Catania• Need to design/build APD lightguide gluing fixtures.


SM Calibration Setup

• System components (Yale, Grenoble)– DAQ + 2 DRORC cards (for readout of up to 4 RCUs)– Mini-Crate with FEE+GTL bus + RCU + DCS + SIU +

Trigger card + cables (LV, Fiber, ethernet) for testing– For SM: LV for RCU+FEE, DDL fiber, Signal

cable+connectors (to be made for 1SM each), Temperature sensors + cables (to be made 3SM each)

– ELMB system with distribution blocks for 8 T measurements in assembly area + 8 T measurements on SM

– LV supply for full SM (for Yale, September for Grenoble)

• Full system setup and tested at Grenoble• Ready to ship to Yale (confirm RCU working)


EMCal SM Readout

~3.5m

3 2 FEE Crates

• 3 Shielded Ribbon Cables per Strip Module (round!) - APD bias, preamp LV and signal. Ground shielding at APD and/or FEE end?

• One 3mm Fiber per Strip Module for LED monitoring (WSU)– 1m (7x1mm) fiber extension to 3mm fiber - Catania proposal -

• Yes! Fabricate at WSU?

– One monitoring fiber per 3mm fiber• Readout via photodiode+preamp+T-card - 2/SM• Mount fixture design? Location?

• 8 Temperature Sensors per SM - Where?– T sensor cable to ribbon cable block

• Between FEE crates


EMCal FEE Crate

From Didier Gabrielle


EMCal FEE Installation in ALICE

• Readout electronics of a SuperModule of 24x48 towers sits in a water-cooled enclosure attached to the SM. Attached during SM assembly and used for calibration.

• Two FEE crates (2 RCU) each with 2 GTL branches with 9 FEE cards.• A group of 12 FEE cards will be connected to a TRU to form a Trigger

Region.

Readout electronics/LED system


EMCal FEE Crate Status

• Design complete• All commercial card guides and supports delivered• Prototype crate built at CERN including cooling manifold

– Cooling manifold tested with PHOS negative pressure cooling water system

• No leaks!• All copper panels uniformly at 18oC (temperature of cooling water)

with ambient T=27oC• After heating copper panel locally to 60oC it returned to T=18oC in

90 seconds.

• Plan– Build cooling manifolds for all 22 FEE crates at CERN– Make parts for 4 FEE crates (2 SMs) at CERN– Make parts for other SMs at ?


EMCal FEE Crate Status

• Intermediate PCB - backplane of FEE crate with connectors to ribbon cables from SM; ordered for all SM– 4 versions: upper & lower, 9 and 10 FEE connections– PCBs ordered, delivery any day now– Connectors ordered, partially delivered

• GTL bus - (delay due to check & modification of Serial I/O lines)– PCBs quotes being received - order in next days– Components ordered, partially delivered

• RCU boards - Need 4 for 2 SMs– Not clear if will be available

• order for 80 new RCUs has not yet gone out

• DCS boards - No problem to get 4 for 2 SMs, – May be a problem to get 22 for EMCal

• SIU boards - No problem• FEE LV bus in crate: cable+connectors purchased (all SM) and made for 2

SM (Cal Poly, San Luis Obispo)


FEE Card Status

• FEE Cards - for all SMs (396 needed)– PCBs quotes from HUST and ELTOS (lowest) waiting

for third quote, then place order– “Reject” cheap ALTRO chips tested at LUND, 599

ALTROs for EMCal (150 FEE boards)– GTL chips already purchased– FEE component price search underway by CERN

• Maybe a mistake?!

– Plan to have FEE cards complete by late September• Would like them sooner of course…


LED Monitoring System Status

• LED system criteria:– Prototype system performed well

but too bulky.• Need 24 LEDs per SM• issues: double-pulses, reproducibility

– Ideally, should vary LED delays to match LED pulse timing to physics signals

– Amplitude variability would be a plus, but not at the price of stability



• Catania solution: Use essentially the same prototypes packed into a high density copper box with one fan-out and 8 LED drivers per box. – Prototype built and tested

• Meets space restrictions to fit 3 boards into gap between 2 FEE crates

• Good performance, as expected, (no double pulsing…)• Good electrical isolation - probably cannot do better• Possibility to add additional cable delay of (n-1) ns * 20cm/ns to

each channel within box.

– Two additional driver boxes being constructed from existing drivers (for Grenoble, Yale) to be ready to use when SM assemby and testing begins



• New LED driver solutions:– Solution A: Ambitious: Build new 8 or 12 LED channel

boards with amplitude and gain control via DAC• DAC control via modified FEE for LED readout to use FPGA on

FEE to control LED boards• Need to prototype - might expect problems• Need to modify FEEs and develop FPGA code for control

– Solution B: Better: Build new 8 or 12 LED channel boards with exactly same functionality of prototypes

• Cheaper to build than individual drivers, less mechanical work, more elegant

• Some risk of problems due to increased cross-talk• Possible to add additional cable delay of (n-1) ns * 20cm/ns to

each channel?



• Need to design/build new RCU trigger boards– “Existing” RCU trigger boards have only trigger input to trigger

DAQ externally via the RCU. • Basically a NIM to TTL convertor to give input signal of proper

amplitude and width to RCU FPGA input.

• Used in beam test and systems being shipped to Houston,Yale,etc….

– In ALICE, the LED system will be triggered by Pre-Pulse trigger, only available via TTC, I.e. available in RCU

• Use RCU FPGA output to trigger LED drivers

• Positive output only - not NIM signal -– Need to modify LED trigger fanout boards

– Need new boards at time of SM installation• Design will be started when Valencia student arrives (September)


LED System: Other Issues

• Decision to build 1m long 7x1mm extensions to 3mm fibers– Yes, at WSU

• Location of fibers for monitoring LED output – At Strip module distribution on back of SM (default)– Or at coupling of extension to 3mm fiber near FEE crate

• Tests underway by Francesco

• Readout of monitoring fibers: 24 LEDs using 1 FEE card.– Photodiode+preamp+molex+T-card+ribbon to FEE– Either on back of SM, or at FEE crate (see above)

• If on SM: must be <~3cm thick for clearance during SM insertion

– Need to design T-card+preamp+APD+fiber fixture• T-card?

– Default: Use normal EMCal T-card (12 of 16 channels used)– New T-card: Make a new 12-channel T-card as compact as possible


EMCal Trigger Status

See talks by Hans and Olivier

Summary:• Production of prototype TRU end of ~July• Production of prototype STU end of ~July• Prototype tests August-September• Production in Fall• Try to have TRUs installed at SM assembly sites for first

SMs – If not, then should be installed in FEE crate prior to

installation on CALFrame.


Electronics Services

• EMCal HV and LV – Strasbourg purchases

• HV crate + 4 modules (1 module per EMCal “quadrant”– ISEG Crate + 1 module

purchased for CERN beam tests

– 2 more modules purchased• LV Wiener

– One 0-15V 12-channel for EMCal purchased

– One 0-8V 6-channel per quadrant - 2 purchased

– One 0-8V 12-channel for SM assembly at Yale and Grenoble - 2 purchased

Rack O12 - EMC Rack Y10 - EMC/PHOS/CPV

5554 Turbine + Rack Monitoring535251 Heat Exchanger504948474645 Unused44434241

40 Netgear switch 4039 Netgear switch 3938 cable feedthrough 38 SY252737 37 (CPV)36 Turbine + Rack Monitoring 3635 35 Patch panel34 34 (CPV)33 Heat Exchanger 33 space for heat exchanger32 32 Cable feedthrough31 3130 3029 Wiener PL-500/F12 2928 +13.7 V OM21.0001 28 Iseg27 27 (PHOS)26 2625 Wiener PL-500/F12 2524 2-8V OM21.004 24 Patch Panel23 23 (PHOS)22 22 space for heat exchanger21 Wiener PL-500/F12 21 Cable feedthrough20 2-8V OM21.004 2019 1918 1817 Wiener PL-500/F12 17 Iseg16 2-8V OM21.003 16 (EMC)15 1514 1413 13 Patch Panel12 2x12 LV Patch Panel 12 (EMC)11 1110 10

9 98 87 2x12 LV Patch Panel 76 6 Unused5 54 43 32 21 Air Deflector 1 Air Deflector0 0


Other work during access: Services

• Installation of LV and HV supplies

• Busybox• Cables

– HV cable connectors + distribution panels

– Ethernet connectors + patch panel

– Change TRU LV cables (probably)

– LV and HV cables for LED Drivers

– Cables to BusyBox


Extras


FEE / Trigger / DAQ Overview

• 9 FEE + 1 Trigger Region Unit (TRU) setup/readout via GTL bus.

• Readout Control Unit (RCU) controls FEE on up to 2 GTL bus branches.

• Detector Control System (DCS) RCU daughter card for FEE setup (e.g. APD bias)

• Data to DAQ via Detector Data Link on RCU - passed to High Level Trigger.

Same ReadOut for TPC/PHOS/EMCal


Trigger / DAQ Connectivity

• PHOS Trigger Region Unit (TRU) provides one L0 and 3 L1 triggers on shower energy (4x4 towers) - and 0 trigger.

• L0 and L1 triggers must be ORed before input to CTP.

• An L1 EMCal jet trigger will require a new post-TRU trigger module - Summary Trigger Unit (STU).

PHOS Trigger OR TOR-> EMCal STUPHOS Trigger OR TOR-> EMCal STU


EMCal LED Gain Monitoring System

• LED system needed for gain adjustment and gain monitoring.

• One fiber per module (shown) excites WLS bundle - low efficiency.

• 12 modules (fibers) per strip module fed by one 3mm fiber from remote LED to strip module.

• Prototype LED driver used in test beam.


STU specification :

• L0 trigger : OR of the 32 L0 calculated by the TRU.

• L1-gamma trigger: Energy summed over sliding window of 4x4 towers (2x2 fast

OR) and compared to a multiplicity (V0 det) dependent threshold.

• L1-jet trigger : Energy summed over a sliding window of n*n subregions and

compared to a multiplicity dependent (V0) threshold.

STU

TRU

TRU

L0

L1-gamma

L1-jet

32 T

RU

Multiplicity from V0

4 diff pairEthernet CAT7 cable

TRU is clocked by the BC clock forwarded by STU (40.08MHz)

TTC link

To

CT

P

DDLDCS

Put trigger data in the data stream on

L2a (via DDL)

LVDS links

Summary Trigger Unit (STU)


STU Design :

• Closely follows Trigger OR (TOR) design (shown).

• TOR used by Grenoble in “LoopBack” test to

demonstrate LVDS serial data link feasibility.

• Main differences with TOR

– TTC for better clock signal for serial clock

– DDL link to insert trigger data into data stream

– Virtex5 firmware

• Plan to have TOR as STU as backup, and STU as

TOR upgrade for PHOS.

Summary Trigger Unit (STU)


Jet Trigger

• New EMCal development (CERN, Jyvaskyla, Grenoble)– Upgrade of PHOS TRU FPGA from VIRTEX2 to

VIRTEX5: programming, prototypes, tests. (MIE, CERN, Jyvaskyla)

• Backup plan: PHOS TRU could be used for EMCal, but upgrade to VIRTEX5 will simplify implementation and reduce production cost.

– TRU upgrade layout completed (CERN, Jyvaskyla)– Design, build, program, and test Summary Trigger Unit

(STU) module. – Layout of STU just begun– TRU and STU prototype tests expected for May/June

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July 15-17, 2008ALICE EMCal Meeting, Nantes 0 EMCal Electronics Status Terry Awes ORNL.

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