ECFA-DESY, Amste rdam V. Korbel, DESY and CALIC E 1 The Tile-HCAL, studies and time plans, V. Korbel, DESY, 30m •The last meetings since ECFA-DESY workshop in Prague (Nov. 2002) •actual status of R&D: –scintillators –WLS-fibres, clear fibres, fibre coupling –optimisation of tile-fibre system (TFS) –photodetectors –preamps •measurements with the minical –readout and DAQ –cosmics, –noise and pedestals –LED-calibration –plans for e-beam test at DESY (summer 2003) •status of preparations for the 1m 3 prototype for E-flow beam tests –photodetectors –preamps –VFE RO boards
42
Embed
ECFA-DESY, Amsterdam V. Korbel, DESY and CALICE1 The Tile-HCAL, studies and time plans, V. Korbel, DESY, 30m The last meetings since ECFA-DESY workshop.
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 1
The Tile-HCAL, studies and time plans,V. Korbel, DESY, 30m
•The last meetings since ECFA-DESY workshop in Prague (Nov. 2002)•actual status of R&D:
–scintillators–WLS-fibres, clear fibres, fibre coupling–optimisation of tile-fibre system (TFS)–photodetectors–preamps
•measurements with the minical–readout and DAQ–cosmics,–noise and pedestals–LED-calibration–plans for e-beam test at DESY (summer 2003)
•status of preparations for the 1m3 prototype for E-flow beam tests
–photodetectors–preamps–VFE RO boards
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 2
The last Tile-HCAL meetings
• Since the Prague ECFA-DESY workshop:• main meetings: 4.12.2002, 20.1.2003, 4.3.2003 • LAL-Orsay, preamps for APDs, dela Taille, Cvach,... Dec. 2002• CERN, VFE for APDs with DUBNA, I. Golutvin, I. Tiapkin, F. Sefkow, Dec.
2002• DUBNA, VFE, I. Golutvin, I. Tiapkin, Y. Gilitski, Minsk people,.... Febr.
2003• ITEP and MEPHI, Moscow, B. Dolgoshein, V. Rusinov,..... Febr.
2003• LAL-Orsay, VFE for APDs, dela Taille, I. Tiapkin, F. Sefkow,... Febr.
2003• ????• future main meetings: 6.5.2003, 17.6.2003 ??? To be fixed these days
Documentation: 1. tasks, institutes, people, time plans, meetings, talks and minutes in Web:>>>http://www.desy.de/~korbel/see/tilehacal/....2. detailed Tile-HCAL R&D report, Oct. 2002, available:
“ The Tile-HCAL Calorimeter for the TESLA Detector, a Status Report on the R&D-Studies”
3. new web-page with better guidance is prepared, open next week!
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 3
Presentations for the Tile-HCAL on this workshop
•CALICE collaboration meeting (Monday,31.3.03,NIKHEF):V. Korbel, Introduction to CALICE Tile-HCAL meeting: “Status of the R&D”, 15’M. Danilov for ITEP, R&D in Russia, 20’B. Dolgoshein for MEPHI, News from the Si-PMs as Photodetetctors for the Tile-HCAL, 20’S. Nemecek for Prague, APD’s for the HCAL, gain stabilityV. Korbel for DESY, LPI Tests with the minical, plans for prototype, time scale
•DAQ and Trigger meeting:V. Korbel, DAQ concepts for the minical and Tile-HCAL prototype, 10’P. Daucey, CALICE beam test DAQ
•Calorimeter Session, Hadronic CalorimeterV. Korbel, The Tile-HCAL, studies and time plansV. Morgunov for DESY, ITEP, Prototype Tile-HCAL Simulation withSi-PMs as PhotodetectorsP. Dauncey, DAQ for the CALICE beam test
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 4
The plastic scintillators for the tiles
The different scintillators studied:PVT: -BC-408, BC-404,.....PS:
•SCSN-81, Kuraray•new R&D scintillators from Kuraray:•ITEP/Vladimir: BASF-143, others•Protvino/LPI SC-306M, SC-307.....•Charkov
The PS scintillators based on PS •show ~0.5..0.65 LY of PVT•but ~ 5 x cheaper•possibility to cast them in tiles (with grooves)>>> made studies on •LY and uniformity, ok?•>>> decision to select producer
M.Danilov,CALICE mainrecent measurements in ITEP
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 5
Details of TFS Optimisation Studies
Centre/straight WLS-fibre Diagonal/bent WLS-fibre
No stress on fibre,fibre refl. =tile reflector
Double looped fibre •strong fibre bend,•most stress on fibre,•probably ageing damages,•fibre end fibre reflector inside tile >>> special reflective coating needed ?
L=7,85cmL=5cm
L=31,4cm 1.1 mm hole in center •drilled and polished? •could it be made during tile moulding?
more stress on fibre,fibre refl. =tile reflector
clear RO fibre to couple:1-3.5m in detector,light attenuation <18%
L=7.85cm
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 6
The WLS-fibres
1 mm diameter, double clad, BC-91ABC-92BC-Dayglo, red range extendedKuraray, Y-11(100-500ppm) WLS shifting component
polishing of fibre endfibre end reflectorattenuation lengthconversion efficiencystability against bends, loops (2.4 mm radius)ageing agains bend stress, in radiation field
>>>> Y-11(300) for short fibres Y-11(500) for long fibresmaterial available for all minical channels University Friedberg/Giessen
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 7
The coupling of WLS-fibres to scintillator
, similar to BC-408, 404
Have selected Kuraray Y11(300)
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 8
TFS LY measurements at ITEP
M.Danilov,CALICE main
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 9
The actual achieved LY for the TFS
, Kuraray, WLS-fibre
3M-Super Radiant Reflector
Scintillator BC-408,
All together: 100% reflectivity at fibre end
Treatment direction
22+/-1.5 pe (BC-408, Aug. 2002)>> 26 (new results from ITEP)•both Russian scintillators have ~ 2/3 of BC-408 LY•~20% more LY can be expected by improving polishing of WLF-fibre end,•no gluing needed anymore
Light yield/tile/MA-PM
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 10
Photocathode sensitivity of APD
WLS-fibre, Kuraray
clear-fibres, Bicron and Kuraray
•attenuation in clear RO-fibres minimal:BC-98: 0,65 db/m ~ 40% for 5m fibre•no damage observed for bent fibres(d=5 cm)•no ageing during 1 day observed>>> Y11(300), on tile + BC-98 RO-fibre
Light attenuation measurement in RO-fibres
10,20,50 and100 cm
(ITEP)
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 11
WLS fibre-clear fibre connection
WLS-fibre >>clear fibre:•standard is gluing with optical gluebetter procedure: •thermo-fusing, ~ 80-120oC, heating by 1-2 windings of resistive wirefibres cut, adjusted and pushed together in glass tube of 1.10 mm inner hole diameterfew A current for a few sec.>> connection difficult to find by eye no light loss seen at connection first results: 84% transmission improvement potential still available in the fusing procedure
Well established procedure at FNALfor CDF calorimeter, 90% transmission >>production parameters can be optimised
Pressure, temperature, timeguide tube diameter ?
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 12
The remaining candidate photodetectors:
APD’s: S8664-55spl, 3x3mm2,
S8550, 32 pixels of 1.6x1.6mm2
at test in PragueSi-PM’s (MEPhI): gain ~2*106
photocathode eff. ~ 15-20% sizes: 1x1mm2, 576 and 1000 pixels/mm2 -800-1200 Photodetectors needed (APDs) with 3-7 tiles combined to calo cells or -3200-4800 Si-PM’s of 1x1mm2 needed alternatively-decision to use both detectors in prototype
Photodetectors
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 13
APD’sHamamatsu, 3x3mm APD, S8664-55splpackage is same as S8664-55 (5x5 mm APD)'s with resin coating.Delivery time takes 1.5 months for 30 pcstypical performance:gain= 50 100 >1000 possibleId 600pA 1.2nAC 28pF 28pFhave 6 APD’s for tests170 Euro per piece, for 30122 Euro per piece, for 300 60 Euro per piece, for 1500 25 Euro ? for > 100 000 APD’s?
C
GAIN M
Id
500 V
10
100Hamamatsu S8664-55
0
50
100
150
200
250
0 50 100 150 200 250 300 350 400
bias voltage
gain
Future plan (Hamamatsu) : APD Array :try to make low capacity type, proceed with "3 x 3 mm, 4 x 4 ch APD-array".target characteristic is as follows. C : 15 pF Variation of gain : +/- 20 to 30 %
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 142 ns
2 mV
Some features:• Sensitive size 1x1mm2 on 1.5x1.5 mm2
• Gain 2106 at Ubias~ 50V • Recovery time ~ 100 ns/pixel• Nuclear counter effect: negligible (due to Geiger mode operation)• Number of pixels: 576, now 1000/mm2
• Dynamic range > 200
R&D at MEPHI (Moscow), B. Dolgoshein, together with PULSAR (Russ. Industry)
R 50
h
pixel
Ubias
Al
Depletion Region2 m substrat
e
ResistorRn=400 k
20m
42m SiPMs, Silicon Photomultiplier
For further details see:«Advanced study of SiPM»http://www.slac.stanford.edu/pubs/icfa/fall01.html
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 15
Performance of SiPMs with 1 scint.Tile
DESY e-test beamwith various Si-PMs (MEPHI)
4-8 pe576 px53-55V
15 pe1000 pxSi-PM on tile
10 pe, 576 px54V
minical
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 16
0 5 10 15 20 25 30 35 400,0
0,1
0,2
0,3
0,4
0,5
0,6
0,7
0,8
0,9
1,0
10-2
10-1
100
101
102
103
104
105
106
107
108
MIP Detection by one cell ( 3 Tiles + 3 SiPMs)
98% efficiency
Da
rk r
ate
, Hz
Threshold, phe
MIP
de
tect
ion
eff
icie
ncy
Si-PM’s, dark rate and MIP detection
Sum of 3 tiles,e-beam test DESY
576pix/mm2From Elena Popova, MEPhI
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 17
Minical array
Assembled with up to27 scintillator layers, of 9 tiles each, 5x5X0.5 cm3
243 scintillator tiles or81 cells of 3 tilesread out by ~ 50 cm WLS fibres to photo-detectors:
Aim of this device is:cosmics, study of:•LY•uniformity of response•calibration with MIPs•stability of MIP signals•different photodetectors•long term ageing
LED monitoring:•stability•dynamic range
e-beam, study of:•energy resolution•constant term
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 18
Minical, pictures
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 19
Minical, pictures
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 20
Where are we?
Status now, for minical tests:•WLS-fibres ordered and delivered, 500m(Y11-300) and 100m(Y11-500)•3M super-reflector foil available• minical now modified by Prague group: 9 mm gaps, larger housing, windows for feed-through, light tight,
easier access to interior•6 new Hamamatsu APD’s (3x3 mm2, 190 Euro/piece) now at DESY
to be inserted in minical for MIP tests, yield next 3 weeks ?•Si-PM production/delivery schedule (see Boris talk)
next 30 available, than 100 up to June, 1000 pixels/mm2
•TFS geometry, reduce variety soon, up to end April•design/build cassettes, for 9 tiles, 9 mm tick, 27 pieces for July tests•preamps to design/order >> LAL Orsay: 7.4.03, delivery 30.6.03
R&D for Minsk/Gilitski, Prague, DESY/Smirnov types goes on•APD’s and Si-PM’s to order >> 30 APD’s and ~100 Si-PM’s (with 1000pixels)•HV distribution to design/order/build:
The TFS for the minical:--81 tiles with Si-PMs, short WLS-fibres, SI-PM inserted, from Vladimir/ITEP--81 tiles from Protvino, with cylindrical holes??, cast in moulds, together with the tiles or drilled, to insert the WLS-fibres--81 tiles from BC-408, cut and polished at DESY, with a) WLS-fibres in cylindrical, drilled central holes, 50 cm more fibre to APD’s b) WLS fibres in curved diagonal grooves, also 50cm to APD’s• Hope to have a technology to replace the WLS-fibre outside the tiles by fused clear fibres, who does it?• Can ITEP prepare also the 81 Protvino tiles? >>I.e. make grooves or holes, insert fibres, wrap tiles, test in black box?• A special >5 cm long drill of 1.1 mm diameter is in preparation at DESY.• We need to group tiles with equal (+/-5%) LY, 3 tiles of same response to one APD. Thus LY of all 81 TFS to be measured with a source. To do at DESY with help of Protvino/LPI people.Our Time scheme:
•Production of tiles in April/mid May•Machining/Wrapping in May/ mid June•Tests and selection in June/mid July•Delivery to DESY mid July•Start insertion in minical last 2 weeks in July•Cosmic calibration tests 2 first weeks in August•We need more participating physicists during minical set-up and tests.
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 22
Support frames for TFS
MEPhI, ITEP
For APD’s For SI-PMs
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 23
Direct TFS readout with SiPM
M.Danilov,CALICE main
in minical at DESY
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 24
Shower containment in minical, DESY e-beam
1 section, 9 layers, 81 cells
MIP peak used for calibration
Shower leakage to correct withthe middle section of minical
Studies by V. Andreev >>>
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 25
Energy resolution in minical, DESY e-beam
/E=a/sqrt(E) (+) cAim is to study:the effects contributingto the constant term:
•LY fluctuations within tiles•lat. non-uniformity of response•MIP calibration precision•stabilty of calibration•noise•dead gaps between tiles•leakage
calibration a +/- da c +/- dc0 18,16 0,12 0,5 0,4210 18,29 0,18 3,35 0,2620 18,54 0,21 6,41 0,17
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 26
Energy resolution in minical, Si-PM, 576 pixels
calibration a +/- da c +/- dc0 18,16 0,12 0,5 0,42
1. Pre-selection of appropriate photodetectors available: APD’s(~6) and Si-PM’s(~10) ordering larger quantities for more tests in minical (March). Need 30 APD’s and 162 Si-PMs in total, Si-PM’s (1000 pixels!)2. studies and development of integrated preamplifier/shaper circuits, and MEPhI Si-PM with FE preamps.up to end April. Operation in Minical.3. For minical: decide on the optimal APD-preamp type, end March: ---study Minsk and Prague preamps with APD’s in minical, --- important: get noise contribution to MIP-peak (noise vs MIP efficiency) ---order/loan ~2 prototype CALICE-ECAL PCI preamp boards (which should later integrate the photodetector connections)4. Concept/design final preamp prototype boards for the 1000 channel test prototype, ....all and DUBNA?, (April)5. design prototype boards for all APD and Si-PM channels, DUBNA?,(May)6. Up to May to decide, which photodetectors in which quantity to use:
• 1000 APDs or ~ 5000 Si-PMs, • or both types in relevant quantities e.g. 200/2500
7. order of all photodetectors for the Tile-HCAL prototype, June8. Decide/order HV power supply/ distribution, June
Time Planing, 4.3.2003, I
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 40
Time Planing,II
9. Need Russian scintillators for tests in minical, (~20 each, March)10. ordering Bicron BC-408 for the larger tile sizes, ~8 m2, up to Summer11. define optimal cell and tile sizes, from software and hardware studies, decision up to end of April12. Prepare 300 tile minical test at DESY, (100/100/100) May13. design of the prototype stack, April/May14. a detailed tile-plate assembly concept has to be defined, July15. Minical test at DESY, with final photodetector types, July-September16. building of stack steel absorber structure, in ITEP or Prague? >August17. casting/machining of ~3700 tiles up to September, (in factory ? or machining at DESY, or elsewhere?)18. assembly of the TFS in tile plates (detector cassettes), November19. TFS connection with photodet. and preamps, start November-December20. RO via CAMAC as long as British DAQ not available, end 200321. winter 2003/2004 operation studies with LED gain monitoring, and calibration studies with cosmic muons, with increasing number of calorimeter cells as assembled.
ECFA-DESY, Amsterdam
V. Korbel, DESY and CALICE 41
1. Enough LY from TFS (~200 photons at photodetector)2. APD’s and SI-PMs are the photodetectors which do the task3. Preamplifiers with low noise are essential (MIP-noise separation,calibration)4. Minical test to establish calibration precision in summer5. Now design of prototype boards for APD and Si-PMs, DUBNA6. Photodetectors, large quantity to order in summer:
• 1000 APDs or • ~ 5000 Si-PMs or • both types in relevant quantities e.g. ~250/3500
7. Prototype stack (1m3) will be build in summer8. Assembly of PT-stack with TFS starts in Jan. 20049. Spring 2004 is used to set up and calibrate all channels with cosmics.