agenda agenda (gran sasso, 20 may 2003) tt status reportm. dracos front-end electronicsl. raux...

AgendaAgenda(Gran Sasso, 20 May 2003)

• TT status report M. Dracos

• Front-End electronics L. Raux

• Discussion

TT status reportTT status report

1. Summary of the Brussels TT workshop (11-12 April 2003)

2. TT prices

3. TT schedule

TT status reportTT status report(Brussels, 11 April 2003)

1. Detector components• Status of scintillating strips J-L. Guyonnet• Fibres and fibre testing device M. Dracos• End-caps and module final design G. Van Beek+G. Wilquet• Light injection system P. Vilain• Status of the LEDs and the pulser K. Borer• PMT's and PMT's testing device T. Waelchli • Magnetic shielding of PMT's E. Baussan• High Voltage modules F. Juget• Front-end electronics J-P. Repellin• DAQ electronic card J. Marteau• Radioactivity measurements F. Juget + D. Autiero• Other components (double face adhesive, fibre glue, aluminium sheets etc...)

2. Module construction procedure• Strip machining, gluing of double face adhesive on aluminium sheets, fibre gluing system, strip

gluing tables, cookie polishing M. Dracos• Module tests (light tightness etc...) and calibration J-L. Guyonnet• Module transportation to Gran Sasso M. Dracos

3. Installation procedure• Wall mounting G. Van Beek+M. Dracos• Cabling (DAQ) and tests using light injection system J. Marteau• Wall insertion in the detector G. Van Beek• Tools needed at Gran Sasso and space needed at Gran Sasso

4. Production and installation schedule5. TT cost

Scintillating StripsScintillating StripsStrip production: AMCRYS-H (Kharkov), delivery

will start in September (+administration delay~1.5 months) and will last 14 months.

Price: 468 k€ (estimation: 540 k€)Strips: 450 k€Transportation: 18 k€Quality tests: DubnaStrip machining at Kharkov

Batch # Number of strips % Months after notification

Batch 1 1675 5 6

Batch 2 3350 10 8

Batch 3 5025 15 10

Batch 4 5025 15 12

Batch 5 5025 15 14

Batch 6 5025 15 16

Batch 7 5025 15 18

Batch 8 3350 10 20

Scintillating StripsScintillating Strips

• Requirements for Tendering (33500 strips): • polystyrene+p-terphenyl+POPOP• Mean number of photoelectrons > 5.5• Number of photoelectrons for each strip > 4• On-line quality checking• Bar codes on each strip end• Geometry

scintillator

FibresFibres• Tendering : started (end: 3rd of June, decision: 5th of

June)

• Best known fibre : Kuraray

• Tests during module production: Dubna device + continues test for damaged cladding

1=114 cm2=652 cm

FibresFibres• Requirements for Tendering (311 km):

core: polystyrene+double cladding diameter: D=1.00±0.02 mm eccentricity: Dmax-Dmin < 0.03 mm cladding thickness < 0.1*D bumps:

o<50 over 1 km with 1.02 mm<D<1.04o<15 over 1 km with 1.04 mm<D<1.07

absorption about 420 nm (similar to K27) emission about 500 nm decay time < 10 ns attenuation length att > 500 cm for 250 cm<x<1000 cm dispersion on att < 10 % light yield > sample-7% dispersion on light yield < 7% mechanical resistance: for curvature of 10 cm, light loss<5%

holes on cookies: 1.08 mm

CookieCookie

End-CapsEnd-CapsTendering

• With the agreement of our CERN advisers, the call for offer has been launched by the University of Brussels, having in mind to place the order at CERN in order to escape the VAT in Belgium and facilitate the tax-free temporary exportation to Italy. A similar procedure had been approved by the Financial Committee for AMS.

• In agreement with our University advisers and with the funding agency (FNRS) the call for offer has been limited to the 5 firms that had qualified to the CERN market survey.

• The call has been sent at the beginning of April, the deadline to submit being April 28.

• Two firms have submitted an offer. The offer from Simic (I) was missing the required description of the fabrication procedure. The offer from Aériane (Be) was complete, more than two times less expensive, slightly lower than the expected value quoted in the MoU and within our budget. Thus Aériane has been selected. The cost is 497.4 k€.

• The file to be submitted to the next CERN Financial Committee on May 28 has to be ready by April 28. It is being finalized with the help of our CERN advisers.

• In parallel, we have resumed the discussions with the Belgian administration to try and escape VAT and the customs taxes, would we be forced by CERN to order from Belgium. The next meeting will take place on Tuesday 22 April. CMS Belgium could escape these taxes.

• A temporary procedure must be find to order the first ~20 end-caps a.s.a.p. The raw material must be ordered before the summer holidays to have them ready by the end of September.

End-CapsEnd-Caps

Light injector

Readout main board

Front-end electronic board.

Cable way

Mezzanine board

Old design

End-CapsEnd-Caps•Fiber cover •Cable cover.•U profile cable way.Also used to link the end-caps•Volume for DAQ electronics.New design

+15 mm compared to previous version

End-CapsEnd-Caps

Steel platestype ST37 Thickness 0.8 mm

Magnetic shielding for the PMT's

Bottom side

TOP side

Bottom and top plates are screwed on the iron piece supporting the cookies and the light injector

Bottom plate

Top plate

End-CapsEnd-Caps

final ?

Final Module dimensionsFinal Module dimensions+

2x15

mm

Light injection systemLight injection system

Ensure light tightness

LED + protection (?)


1.Window opening

2.Light guide + filter

3.Fixation and insertion

4.Light tightness

Some studies towards final design :


(mm)

(mm)

NPE

NPE

Chosen value

Variation of the window size (on fiber side, to allow for the fiber curvature towards the strips)

Light injection systemLight injection systemDynamic range with 6 mm Ø light guides

70% filter

90% filter

(Preferred)

LEDs and pulsersLEDs and pulsers•2500 blue LEDs already bought (Kingbright L-7113PBC)•Results of first performance checks:

•No problem for adjusting the dynamic range by means of Vbias

•Speed: 2 out of the 140 LED's already tested were unacceptably slow

4 more were a bit marginal for FE chip version 2

LEDs and pulsersLEDs and pulsers

LEDs and pulsersLEDs and pulsers

• The pulser PCB components and assembly have already been ordered.

• Delivery of the total number (1050) of LED pulsers: mid June.

• The 2500 LEDs will be tested and grouped into 9 categories (3 categories of light pulse magnitude x 3 categories of response to Vcontrol.

• The LED pulsers need to be calibrated together with their individual 2 LEDs (during summer).

• Cost: 2.33 k€ for LEDS, 33.92 k€ for pulsers.

Photomultipliers and testing devicePhotomultipliers and testing device

• 32 PMTs already ordered by INFN, delivery (2.5 k€/tube): June (CERN)• INFN has to start the PMT tendering a.s.a.p in order to have the first PMTs

delivered beginning of January 2004 (3.5 months delivery delay for the first 50 PMTs).


•8 boxes x 8 fibersno neighbors lighted @ the same time

•2 LED/boxincrease dynamic range

•all 16 LEDs triggered individually•2 monitor PMTs

Bi – sources for reference peak

setup

Photomultipliers and testing devicePhotomultipliers and testing devicereproducibility of output signal

Ratio between anode charge of 2 runswith all the same settingsPM removed and replaced, HV left on

HV down, PMT removed, storedand replaced. Looks like tilted

HV on for 2 hrs:anode charge decreases by 2.5%

Using grease (SISS SI 7)→very poor reproducibility! but +14% anode charge…

ch #

ch #

ch #

Photomultipliers and testing devicePhotomultipliers and testing deviceCharacteristics to be measured

•Gain•at 4 different high voltages•working high voltage

•never higher than 1000 V

•Gaini > 3.5 105

•Gaini after front-end chip correction ~106

•5th run at working high voltage•Cross-talk•Dark current•Amount of light collected•Front-end chip correction factors (data-base)


Some limitations of the system

•8 fibers lighted at the same time,•11 bit FERA ADCs: 480 pC full range = 25 p.e. @ G = 106,• rates of monitoring sources ~35 Hz.

Conclusions• device is ready to perform tests,• dynamic range > 4000,• repositioning accuracy > 99%,• tests within “reasonable” time,• able to test more than 4 PMTs per day,• parameters to be measured already defined.

Magnetic shielding of PMTsMagnetic shielding of PMTs

Large shielding better but not enough

big effect on border channels


Cross-talk study

Border channels


Fe (ARMCO) shielding instead of Mu-metal

bord

er c

hann

el

cent

ral c

hann

elARMCO (0.8) is the best but still edge effects


Shield more by using end-caps sheets (Fe instead of Al)


Loss < 10 % (for border channels).Fe-STE 37 (low price) gives the same results than Fe-ARMCO (expensive).

High Voltage ModulesHigh Voltage Modules

• Main requestsMain requests The module sizeThe module size

Fit the space allocated in the electronic card Fit the space allocated in the electronic card

ReliabilityReliability Need a burn-in for each moduleNeed a burn-in for each module

PricePriceAround 100 eurosAround 100 euros

• Have been in touch with several companiesHave been in touch with several companies Kept 3 candidates Kept 3 candidates

Iseg, Traco, SpellmanIseg, Traco, Spellman

• Iseg is the best candidateIseg is the best candidateGood sizeGood sizeBurn-in offerBurn-in offerPricePrice

High Voltage ModulesHigh Voltage Modules

• From ISEGFrom ISEG New complete offer for the burn-inNew complete offer for the burn-in

ProcedureProcedure– At least 24 cycles At least 24 cycles – Under load: Vout = -1kV Iout = 1 mA Under load: Vout = -1kV Iout = 1 mA – Temperature cycle:Temperature cycle:

low time> 30 ’ T = 25°Clow time> 30 ’ T = 25°C Transition time> 60 ’ T = 25°C to 70°CTransition time> 60 ’ T = 25°C to 70°C High time> 30 ’ T = 70°CHigh time> 30 ’ T = 70°C

Will provide the results of the burn-in with a reference number of each moduleWill provide the results of the burn-in with a reference number of each module Price for 1000 modules: around 12 euros/modulePrice for 1000 modules: around 12 euros/module

• 1 ISEG module has been given to the Lyon group to be 1 ISEG module has been given to the Lyon group to be implemented in the electronic cardimplemented in the electronic card

• Tendering ready to start but frozen for financial Tendering ready to start but frozen for financial reasons up to September, at that moment place the reasons up to September, at that moment place the order without passing by a tendering.order without passing by a tendering.

ElectronicsElectronics

• Front-end electronics: L. Raux

• DAQ electronic card: J. Marteau(discussion about electronics power consumption)

Specific presentations:

Radioactivity MeasurementsRadioactivity Measurements

• Background reductionBackground reduction

– Cosmic-rays: underground at the ‘ La Vue-des-Alpes ’ tunnel (600 mwe) Cosmic-rays: underground at the ‘ La Vue-des-Alpes ’ tunnel (600 mwe)

• DetectorDetector

– 400 cm400 cm33 Ge crystal coaxial ultra low background Ge crystal coaxial ultra low background

• ShieldingShielding

– 15 cm of very pure OFHC copper and 20 cm of low activity lead in a tight aluminium box 15 cm of very pure OFHC copper and 20 cm of low activity lead in a tight aluminium box pressurized with nitrogen to be at low temperature and to keep the radon out.pressurized with nitrogen to be at low temperature and to keep the radon out.

Experimental set-upExperimental set-up


• Energy spectrum for Chemo Technique co-Energy spectrum for Chemo Technique co-extruded stripextruded strip

Time measurementTime measurement : : 165 hours ~ 1 week165 hours ~ 1 week


radioactivity rate smallradioactivity rate small


•Scintillator bar (Kharkov): 2.14*10 -5 * 2800 g = 0.06 Bq/strip•Double face adhesive (M2755): 2.94*10 -4 * 100 g = 0.03 Bq/strip•Glue (815 C): 6.0*10 -4 * 7 g = 0.004 Bq/strip

•Optical fibre and aluminium cover: waiting for measurement

Rough estimation of the activity of one scintillator stripRough estimation of the activity of one scintillator strip

Radioactivity Measurements at Radioactivity Measurements at Gran SassoGran Sasso

A test like the one performed in 2001 in the LNGS underground lab in order to measure the single and coincidence rates for the RPC TT option in the GS environment.

Repeat this measurement with the scintillating strips in order to have a better knowledge of the background rates for the final experiment (DAQ, trigger, calibration, etc …)

Understand the various components of the background Cross-check the simulation Optimize the data-flow, trigger and calibration on the basis of

the measurement

Needs

Radioactivity Measurements at Radioactivity Measurements at Gran SassoGran Sasso

The TT background test setupoStructure of 2 mini-walls

(standard lead + last 2 mm low radioactivity lead, 3.5 T) with 64 (X) + 64 (Y) strips (167x167 cm2) mounted on standard end-caps, vertical mounting.

oOne side readout with 2 MAPMTs and 2 BFOOT V2 cards.

Preparation of the setup and execution of the measurement (June) by theLyon and Strasbourg groups (supported by the GS lab with the TARI program).

167 cm

Scintillator Planes

167

cm

supporting structure prepared by Lyon

Other ComponentsOther Components

• Aluminium sheets: non treated sheets already ordered (62 k€),dimensions at 20°C:

• Double face adhesive: M2755 (MACtac) already ordered (54.2 k€).

• Aluminium strip on top of the grooves: 10 mm large (3 mm glue – 4 mm without glue – 3 mm glue).

• Cookies (18.7 k€→9.0 k€) and their supports (23.6 k€→12.5 k€) will be ordered soon (drawings ready).

• Fibre glue: EPON Shell 815C (MINOS).

• Transportation boxes: Two prototypes already produced, studies under way.

• Vertical x-y tables for calibration: First one already installed, the second one will be ordered end of the year (before calibration starts).

• New spectrometers for x-y tables under construction.

3 +60 -01680 mm, =6850 mmw

Module construction procedureModule construction procedure

• Bar codes on all items

• Assembly procedure defined using wall 0 construction experience

•gluing of double face adhesive on aluminium sheets, •fibre gluing system, •module assembly tables, •cookie polishing.

• Module tests•light tightness•calibration

• Module transportation to Gran Sasso


Gluing of double face adhesive on aluminium sheets

• In private company: 115 €/sheet → 119.6 k€ → too too expensive

• Gluing machine to glue the double face adhesive on aluminium sheets already ordered (8.5 k€). Work will be done from June to September at Strasbourg (before the module production starts).

• Advantages:

• much lower price

• possibility to partly remove oil

• possibility to make the holes on aluminium sheets at Strasbourg after double face adhesive gluing on all aluminium surface (price in private company: 21 k€)


Fibre gluing system

• System improved

• The x-y table will become x-table with half width for 2 16-strips frames (3.5 k€) in order to be able to go around

• A glue-hardener mixing system already bought

• Permanent and larger syringes:

• lower price (-15 k€)

• faster system (equivalent of 2 modules/day)

Wall 0 constructionWall 0 construction

1

2

3

4


5 6

7

8


9

10

11 12


"croisillons" maintaining together horizontal and vertical modules

First TT vertical planeFirst TT vertical plane


First horizontal module


for cables

Final module constructionFinal module construction

construction hall storage and test hall

Module testsModule tests

•Final readout chain installation (PMT, front-end PCB, DAQ card)• PMTs verified and studied before (working voltage found, gain and dark

current measured, chip "correction" coefficients determined),• front-end chips already tested,• DAQ cards also well tested before sent to Strasbourg.

•Light injection system• installation of the light injection system,• test,• sealing of the module,

•Light tightness• using DY12 rate (easy, fast and independent of the readout system),• if leaks investigate and repair.

Module testsModule tests

•Calibration• 2 scanning tables,• 2 electron spectrometers per table (32 strips each),• read in a data-base and send to the front-end chips the "correction" coefficients

determined by Bern during PMT testing,• find single p.e. characteristics (position, width) using light injection system (at

single p.e. level),• 11 scanning points per strip,• 2 modules/table/day,• on-line analysis of the data,• store results in a data-base.

•Manpower: 2 "physicists"

Module transportationModule transportation•Transportation boxes

• 4 modules/box (~1 ton total weight),• used also in Gran Sasso during wall

mounting,• partially produced in the industry,• cost: ~2000 €,• due to high price: recycle the boxes

• first option: 6 boxes at IReS, 6 boxes travelling, 6 boxes in hall B, 6 boxes for overlap → at least 24 boxes needed → fast operation,

or• second option: use always the same boxes for transportation and build

storage slots at IReS and in Gran Sasso hall B: at least 10 boxes needed→ slow operation (module loading/unloading)→ special boxes for each operation:

• 2 boxes for transportation between the two halls at IReS,• 6 boxes for transportation to Gran Sasso,• 2 boxes for transportation from hall B to hall C and wall mounting.

TT installationTT installation

2.5 m 2 m2.5 m

supporting arches (15 walls ~30 t)elevator

platform boxes from hall B


(back)

Fixing on Borexino wall

Supports of auxiliary I-beams

4.40 m

6.80 m

7.80 m

0.8 m

7.85 m

7.56 m10 cm

20 cm


2.5 m2 m

supporting I-beams (15 walls ~30 t)

platform


PMTs

brick wall I-beams (no sagitta if used by TT)

TT Module InstallationTT Module Installation

• Manpower for installation:For wall assembly: 3 technicians (1 for cabling provided by

DAQ)Wall insertion: 2 technicians:

shared with brick wall mounting• Tests during installation: using light injection system and DY12 for

light leak tests.• Space in hall B: Only for module boxes storage (10x5 m2).• Tools needed:

• Module mounting and storage structure,• small crane under main I-beams (2 tons),• elevator (7 m height)• scaffolds ?, • trolley for moving boxes (1 ton) from hall B to hall C.

TT pricesTT pricesComponents Units

Price/unit€

Quantity SparesTotal

k€TotalkCHF

% Remarks Institute

PMT unit 1308.02 992 48 1360.34 2006.0 32.4% INFNEnd-caps unit 485 992 28 494.70 729.5 11.8% ULBScintillator strips 14.93 31744 1756 500.16 737.5 11.9% Including transportation and tests IN2P3Fibers m 1.45 294000 17000 450.95 665.0 10.7% 9.26 m/strip IN2P3Module production module 790 496 8 398.16 587.1 9.5% For manpower BernProduction chain chain 120000 1 0 120.00 177.0 2.9% For module production and tools IN2P3H.T. unit 100 992 48 104.00 153.4 2.5% Integrated units IN2P3Coextrusion heads unit 92000 1 0 92.00 135.7 2.2% (44.0, 10.0, 38.0) ULB, Bern, IN2P3Prototype wall 76100 1 0 76.10 112.2 1.8% (49.0, 24.1, 3.0) IN2P3, ULB, BernTransportation boxes box 1950 26 0 50.70 74.8 1.2% 4 modules/box IN2P3Aluminium sheets unit 62.8 992 48 65.31 96.3 1.6% 22.8 m2/module (0.6 mm thick.) IN2P3Transportation travel 1400 40 0 56.00 82.6 1.3% From prod. fact. to GS IN2P3Double face adhesive m² 3.61 11500 3500 54.15 79.9 1.3% 5 Kg/module IN2P3Front-end electronics channel 0.76 63488 6400 53.11 78.3 1.3% (cables…) IN2P3PCB unit 64.6 992 58 67.83 100.0 1.6% IN2P3x-y tables table 17000 2 0 34.00 50.1 0.8% Gran Sasso+production factory IN2P3LED pulsers unit 32.3 992 58 33.92 50.0 0.8% BernAl tape on grooves m 0.108 234500 15500 27.00 39.8 0.6% 7 m per strip IN2P3Spectrometer tests 25000 1 0 25.00 36.9 0.6% at production factory IN2P3Al sheets machining unit 20 992 48 20.80 30.7 0.5% 32 holes at each side IN2P3Strip machining strips 0.5 31744 1756 16.75 24.7 0.4% Rigth length+hole+paint+domino IN2P3Spectrometers unit 5000 3 0 15.00 22.1 0.4% production factory IN2P3Tools 14000 1 0 14.00 20.6 0.3% mainly for installation at Gran Sasso IN2P3Al tape on module edges m 1.734 7056 944 13.87 20.5 0.3% 7 m per strip IN2P3Glue for fibers Kg 26 480 40 13.52 19.9 0.3% 15 gr/strip IN2P3Fixation system unit 16.25 744 56 13.00 19.2 0.3% Fixation of horizontal to vertical modules ULBLight injection system unit 5.23 992 48 5.44 8.0 0.1% Light guides ULBLED's unit 0.93 1984 516 2.33 3.4 0.1% For light injection system BernCookies unit 8.65 992 48 9.00 13.3 0.2% Optical coupling with PMT's IN2P3Cookies fixation bar unit 11.98 992 48 12.46 18.4 0.3% Supporting cookie on end-cap IN2P3(1 € = 1.47462 CHF) 4199.59 6192.8 100.0%IN2P3 (MoU=1850)= 1810.61Switz. (MoU=450)= 447.40 paid or orderedULB (MoU=610)= 581.24IN2P3+Switz.+ULB= 2839.25IN2P3+Switz.+ULB(MoU)= 2910.00INFN (MoU=1500)= 1360.34Total= 4199.59

+Dubna contribution on many items

TT scheduleTT scheduleTask Start End

R&D 01/12/2003

Tendering 03/06/2002 01/09/2003

Ordering 01/07/2002 01/12/2003

Delivery at institutes 01/04/2003 04/01/2005

Delivery at "factory" 06/05/2003 02/08/2005

Production line 05/03/2003 01/10/2003

Construction 01/10/2003 02/08/2005

Calibration 05/01/2004 11/08/2005

Delivery at GS 20/04/2004 18/08/2005

Installation at GS 27/04/2004 23/09/2005

Commissioning 26/09/2005

TT detailed scheduleTT detailed scheduleConstraints and assumptions

1. The TT module insertion must start beginning of June 2004 (according to the OPERA overall schedule).

2. One week is needed for one complete wall installation (brick and TT walls).

3. At least 3 TT walls will be pre-assembled per week.

4. The TT module production starts beginning of October 2003 and at least 24 modules are produced per month.

5. The TT module calibration must start the latest beginning of January 2004 (earlier date would be more convenient but not possible due to front-end electronics and DAQ cards availability).

6. At least 4 PMT’s per day will be tested.

TT detailed scheduleTT detailed schedule

DiscussionDiscussion

TT installation and manpower

• 2 technicians or engineers for mounting (for the 5 periods).

• 1 engineer for cabling (from DAQ group), necessary for the

whole installation period.

• 1 TT physicist for supervision (for the 5 periods only?).

Who will provide these people ?

agenda agenda (gran sasso, 20 may 2003) tt status reportm. dracos front-end electronicsl. raux...

Documents

fibre gluing system

tt status reportm

fibre glue

number of strips

module production

cern advisers

strip gluing tables

fibre testing devicem