20th September 2006Riunione CSN1 - Trieste1 LUCID status Outline: The Lucid detector Test...

20th September 2006 Riunione CSN1 - Trieste 1

LUCID status

Outline: The Lucid detector Test performed The installation scenario The electronics Conclusions

M. Bruschi & A. Zoccoli for the Bologna Group

M. Bruschi & A. Zoccoli for the Bologna Group


The LUCID detectorLUCID : “LUminosity measurement using Cerenkov Integrating DetectorGoals: - provide a relative luminosity measurement (integrated and bunch by bunch);- provide η-coverage for diffractive physics

Winston Cones Fibres

Two detectors x 168 Al tubes filled with Isobutane at 1 or 2 Bar pressure

Two detectors x 168 Al tubes filled with Isobutane at 1 or 2 Bar pressure

Winston cones at the end of the tubes bring the Cerenkov light onto quartz fibers.

Winston cones at the end of the tubes bring the Cerenkov light onto quartz fibers.


Activities of the Group since Feb.06

Main activities of the LUCID Group after the Test Beam 05 which provided a light yield of ~5 p.e. :development and optimization of the Monte Carlo code to reproduce the detector performances. Test on bench @ CERN and test beam @ DESY to check the detector performances and tune the MC.Production of new improved detector parts (tubes, Winston cones, fibers).Development of the electronics projectDiscussion of the detector design and of the installation strategies


Test on bench @ CERN

Goal of the measurements:Understand the detector performances and check the improvementson new parts.Tested material: • Tubes:

– Mechanically polished – Electro-polished and mech. polished– Mylar liner– Old tubes (used in 2005 TB)

• Winston Cones:– Ø 4 mm and Ø 3 mm (new design)– Old cones Ø 3 mm (used in 2005 TB)

• Fibers bundles:– PUV 500, 700, FSU 600– Old fibers HUV1000 (used in 2005

TB)


Test on bench: quantities studied


Test Bench results: new tubesTube efficiency vs laser incident angle

0,65

0,70

0,75

0,80

0,85

0,90

0,95

1,00

0 1 2 3 4 5Angle (deg)

I/I0

^(1

/n)

Mylar Mechanically polished

Hamburg's test beam (Mech.Pol.) Electro-polished onlyElectro-polished and mechanically polished

Tube efficiency vs laser incident angle

0,65

0,70

0,75

0,80

0,85

0,90

0,95

1,00

0 1 2 3 4 5Angle (deg)

I/I0

^(1

/n)

Mylar Mechanically polished

Hamburg's test beam (Mech.Pol.) Electro-polished onlyElectro-polished and mechanically polished

Old tube

New tubeMylar tube

Aluminum tubes mechanically polished show a 10% improvement w.r.t old tubes. Close to the Mylar solution.

New tube

Old tube


Test Beam @ DESY

Test beam performed on the 6 GeV electron beam @ DESY

in August 2006

Tested different detector configurations: Old tube, old WC cone, old fiber bundle New tubes, new WC cones, new fiber bundles New tube, new WC cone coupled directly to a single

PM a la CDF (backup solution for LUCID) Exchanged the detector configurations in order to

determine the improvements on the different parts.

First results from the data analysis.


TB results: fiber detector

Fit each single-channel spectrum: add the results or use calibrations and pedestals (from fits) to rescale each event and obtain the total distribution for each tube


TB results: fiber detector II

Middle fibers

Lateral fibers

lateral fibers

Central fibers

Central fibers

Maximum light yield: ~10-12 p.e. ~ factor 2 improvement w.r.t. 2005

Little bit less than expected from test on bench.Some more improvements needed (2 track resolution etc.)

~11.5 p.e.

~9.5 p.e.


TB results: single PM

ADC spectra, with two peaks:A) Cerenkov light only from gasB) Cerenkov light from gas and PM quartz window

AB

R2496


Maximum light yield: ~60-85 p.e. in gas ~40 p.e. in quarzt w. ~100-125 p.e. in tot.Close to the CLC (CDF) performances, with a non optimized system.

Solution appealing for the number of p.e., but need to verify:Radiation hardness of complete PMT system.Background Cerenkov light in the PMT window from primary & secondary particles.PM activation, lifetime and Mechanical design.

TB results: single PM - II


Conclusions on the TB results

Work to be done in the next few months: optimization of the baseline solution to further improve performances. (produce new detector parts, test on bench etc.). Careful verification of the feasibility of the backup option (background, rad. hard. tests etc.). Radiation tests for the baseline (fiber, epoxy etc.) and for the backup solution (PMT, cables etc.) are needed now Work is starting now! Optimization of the Monte Carlo Test Beam of the final detector before the installation(December 2006).


• The proposed plan for a full LUCID deployment includes the installation of a subset of LUCID detector in 2007.

• The LUCID group is aiming for a full installation of the LUCID in the first long shutdown after end 2007.

• This reduced detector deployment in 2007, will be sufficient to allow the preliminary study of the following:– Backgrounds from secondary in the LUCID detector;– Beam related backgrounds; – Timing;– The front-end and backend readout electronics;– The installation and alignment of the LUCID detector;– The gas supply system;– The effect of heat from the bake-out jacket on the LUCID

detector– First luminosity measurements.

LUCID detector deployment-I


• The reduced detector deployment will include the complete LUCID pressure vessel, alignment system and gas system.

• We plan to readout only ~10 tubes/end. Most of the channels will be readout via fused-silica fibres to remote MaPMTs .

• The FE readout will be placed in the vicinity of the MaPMTs - the resulting signals will be driven to the BE readout in USA15. We expect to use an initial version of the final LUCID electronics.

LUCID detector deployment-II

Single PMT

Baseline fibre-optic readout

• A few channels will be equipped with a single PMT placed on Winston Cone ends. These PMTs will be readout, via an amplification stage, in USA15, for timing and light collection studies.

• The full LUCID detector will be installed during the first long shut-down.


Cable lengths

• Baseline:– MaPMTs placed in the

shielding– MAROC chip placed by the

MaPMTs – Drivers boost signal out– Cables go direct to USA15

980 100M)• Radiation level in the vicinity of

the MaPMTs is 35 Grays/Yr

• Baseline:– MaPMTs placed in the

shielding– MAROC chip placed by the

MaPMTs – Drivers boost signal out– Cables go direct to USA15

980 100M)• Radiation level in the vicinity of

the MaPMTs is 35 Grays/Yr

Placing MaPMTsReadout paths

The LUCID readout


The LUCID FED cards

The front end system is now modular so allowing scalabilityThe MAROC Board and part of the ANALOG board has been developed by LUND (thanks!)

TX Digital BoardGOL, FPGA, TX

ConnectorsBoard(HV,LV,RX,TX, analog)

MAROC Boards

Base board(connectors,signals routing, MAROC prog.FPGA )

ANALOG board(ampl.+line driv.)

RX Digital BoardTTCRQ, ELMB128A,volt. reg.


The FED (digital part)

• The TX digital board designed is in production• The other two cards (RX, Connectors) have been

mostly defined (6 more weeks work)• In order to define the Base Board we need to fix

the MAROC I/O (B.L.)• All the components (electronics, connectors –

except HV) have been defined

• A prototype of the front end card (MAROC) should be ready toward the middle/end of November


Electronics/ The analog test board

• The analog test board has been designed with the aim to provide the possibility to test the analog part of the MAROC chip based front end cards

• It will allow to test also single anode PMT based readout scheme

• It is meant to be an important tool that should allow us to understand the detector even in case of delay in the production of a prototype for the MAROC chip based front end cards by using commercially available VME modules for the DAQ

• All its parts already in production/ prototype should be ready beginning of October


Electronics/ Analog Test BoardThe Line Driver daughter card

(Bologna/ LUND)

2 line drivers per daughter card, 21x16 mm2

Gain= 10x5, Bandwidth ~ 150 MHz

Electronics/ Analog Test BoardThe VME distributor card

(Bologna)

• Presently under design in Bologna• The purpose is to f urther elaborate

the signal output f rom the RX card in order to obtain a f ast discriminated signal to be f ed into a commercial VME CERN TDC f rom CAEN f or timing studies purposes

Electronics/ Analog Test BoardThe Mother Board (Bologna/ LUND)

64 MAPMT channels + 8 PMT single anode channels300x60 mm2 – can fi t into the nose shielding

The MAPMT base

Electronics/ Analog Test BoardThe VME RX card (Bologna)

•8 RX channels per cardBased on the El 9110 chip(p.z. comp. and x4 Gain)•Possibility to internally test a f ull TX/ RX chain

•The gain and the pzcompensation can be adj . independently

Electronics/ The Analog Test Board


Conclusions -INew detector parts (tubes, cones, fibres) have been produced and tested on bench and at the DESY test beam in August 2006.

The TB results indicate factor of ~2 improvements over last test beam. Some more improvements are expected in the next detector version

A test beam on the final detector will be performed in December 2006.

Radiation hardness studies on single PMT and fiber bundles are starting now.

New installation scheme for LUCID has been studied. Partial detector deployment foreseen in 2007


Conclusions-II• MAROC2 chip including modifications for LUCID

delivered on July. First tests look promising. • The design of the front-end electronics is started

and it is on track (although we still need a confirmation of the performances of the detector)

• The most important part of the FED is already under production

• The Analog Test Board (Backup solution for tests but also for the 2007 installation) is in advanced status of production (prototype expected for beginning of next October)

• The project is now modular. Moreover, it can be easily adapted in case we will decide for the LUCID readout backup solution

• The development of the readout and trigger electronics could be a bit relaxed since we can use already available pieces of DAQ to give a luminosity measurement as soon as the front end electronics will be available


Backup slides


LUCID position

MBTSTILE

Front face of LUCID end is ~17m from the IP. Projective geometry. Acceptance covered 5.4 <|η|< 6.1 LUCID region 6-7 Mrad/year at 1034 cm-

2s-1


LUCID position (2)• Planned installation after the Big Wheels A/C.


Backup solution (under study)

• Place single miniature PMTs directly onto the end of each Winston cone?

• Advantages:– More light because of direct coupling– Lower electronics cost– Swap quartz fibres for (cheaper) signal

cables• Need to study:

– Radiation hardness of complete PMT system

– Background Cerenkov light in window from primary & secondary particles

– Activation– Mechanical design

First check @ the DESY Test Beam

• Place single miniature PMTs directly onto the end of each Winston cone?

• Advantages:– More light because of direct coupling– Lower electronics cost– Swap quartz fibres for (cheaper) signal

cables• Need to study:

– Radiation hardness of complete PMT system

– Background Cerenkov light in window from primary & secondary particles

– Activation– Mechanical design

First check @ the DESY Test BeamHAMAMATSU R2496

PMT

Miniature PMT

Baseline fibre-optic readout


Richieste finanziarie 2007Gruppo BO-Lumi: 16.6 FTE + 0.85 Tecnol.= 17.5 FTE

Missioni interne:- metabolismo 17.5 k€Missioni estero:- metabolismo (17.5 FTE x 1.5MU x 4.4k€)115.5 k€- C&I (6 mesi x 3 FTE x 4.4 k€) 79.2 k€- Presa dati (3mesi x 2FTE x 4.4 k€) 26.4 k€Consumo:- metabolismo 26.0 k€Inventario: - 2 postazioni di lavoro 4.0 k€Costruzioni apparato: - (vedi trasparenza successiva) 45.0 k€


Richieste costr. Apparati 2007

Elettronica ITEM # price/unit total price

Scheda FED MAROC 2 2600 5200Scheda PMF 4 1500 6000Single Board Computer 1 4000 4000CAEN QDC V792 2 4000 8000CAEN TDC V1190 A (V767) 1 5900 5900PC 2 1700 3400Scheda FIFO 6 1000 6000

Totale elettronica 2007 38500

CAVI+CONN.HV 14 100 1400LV 12 200 2400Optical Fibers (bundle 12) 2 700 1400Optical Fiber (TTCRQ) 2 100 200Signal 12 30 360

Totale cavi+conn. 2007 5760

Totale richieste 2007 44260


Test Bench results: old test beam parts

Good understanding of the detector performances.


Expected improvementsExpected improvements in light yield based on test bench

results:• Tubes: improvements in the internal surface (~ 1.1)• Winston cone: new design + internal surface (~ 1.4 - 3)• Fibers: improve fiber quality. Less attenuation (at 300 nm),

Larger angular acceptance and larger (core)/(clad) area ratio (0.78 compared to 0.68) plus enlarge the light spectrum sensitivity ( ~1.6)

Expected improvements in light collection: factor ~2 – 4

Next steps:• Test beam @ DESY from the 31st of July until the 12th of

August to test the new detector performances• Further detector optimizations• Test beam @ CERN in November to test the final detector


FED MAROCFED MAROCPMFPMF

ANALOGCARD

ANALOGCARD

20th September 2006Riunione CSN1 - Trieste1 LUCID status Outline: The Lucid detector Test...

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