New results and further plans for the tesla tile hcal
This presentation is the property of its rightful owner.
Sponsored Links
1 / 26

New Results and further Plans for the TESLA Tile HCAL PowerPoint PPT Presentation


  • 79 Views
  • Uploaded on
  • Presentation posted in: General

What did we establish so far ?. New Results and further Plans for the TESLA Tile HCAL. Found: scintillators with sufficient light yield tile reflectors with >98% reflectivity WLS fibres with acceptable secondary light production TFS coupling geometry with good LY and response uniformity

Download Presentation

New Results and further Plans for the TESLA Tile HCAL

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


New results and further plans for the tesla tile hcal

What did we establish so far ?

New Results and further Plans for the TESLA Tile HCAL

  • Found:

  • scintillators with sufficient light yield

  • tile reflectors with >98% reflectivity

  • WLS fibres with acceptable secondary light production

  • TFS coupling geometry with good LY and response uniformity

  • a couple of photodetectors with good signal/noise ratio for MIP’s

  • a half dozen preamp prototypes are in design or available

Documented in:

V. Korbel, The Tile-HCAL Calorimeter for the TESLA Detector,

a Status Report, CALOR2002, Pasadena, March 2002,

http://3w.hep.caltech.edu/calor02

http://www.desy.de/~korbel/see/pasadena.ps

V. Korbel, Status report on the TESLA Tile-HCAL,

ECFA-DESY workshop, St. Malo, April 2002,

http://www-daphnia.cea.fr/ecfadesy-stmalo/Sessions/korbel/ppt

http://www.desy.de/~korbel/see/stmalo.ps

16.11.02, ECFA-DESY, Prague


New results and further plans for the tesla tile hcal1

New Results and further Plans for the TESLA Tile HCAL

What did we establish so far ?

continued........

J.Cvach, Calorimetry at a Future e+e- Collider,

ICHEP02, Amsterdam, July 2002,

http://www.desy.de/~korbel/see/ichep02-cvach.ps

V. Korbel, Progress Report on the TESLA Tile-HCAL,

LCWS2002, Jeju Island, Korea, September 2002, Proceedings

http://www.desy.de/~korbel/see/lcws2002_korbel.pdf

The CALICE Collaboration,

Progress Report on Calorimeter R&D for the Future Linear Collider,

Memorandum from the CALICE Collaboration to the DESY-PRC, Oct. 2002

http://www.desy.de/~korbel/see/PRC_Oct2002_docu.pdf

V. Korbel for the TESLA Tile-HCAL group,

The Tile-HCAL Calorimeter for the TESLA Detector,

a Status Report on the R&D-Studies for the DESY-PRC, Oct. 2002

http://www.desy.de/~korbel/see/tile-hacal-rd2002.

31 pages, with a lot of further references, a draft for a NIM or DESY paper

16.11.02, ECFA-DESY, Prague


New results and further plans for the tesla tile hcal2

What are the next steps ?

New Results and further Plans for the TESLA Tile HCAL

  • Study:

  • performance and improvement of cheaper Russian scintillators

  • optimisation ideas for the optical transmission path

  • tile production technologies: casting, extruding, machining...

  • optimal tile sizes, arrangement in detector layers, granularity of cells

  • final design of the HCAL prototype structure

  • improvement of possible photodetectors in performance, package density and cost

  • appropriate preamps to be optimised for the different photodetectors

  • operation of a pre-prototype (mincal) at DESY

16.11.02, ECFA-DESY, Prague


Systematic studies for tfs optimisation i

Systematic studies for TFS optimisation, I

FPOF=WLS

Light emission of

different short WLS-fibres

illuminated with room light

Light emission for BC-91A

illumination across fibre diameter

spot of 100mm,

0 = fibre center

16.11.02, ECFA-DESY, Prague


Systematic studies for tfs optimisation ii

Systematic studies for TFS optimisation, II

Light source

40 cm

Light yield for 3 short WLS-fibres

normalised to source photo-current

at l = 500 nm

>>>only scintillation light

with l < 470 nm is useful

  • LE-peak of:

  • BC-408: 425 nm,

  • BC-404: 408 nm

  • 16.11.02, ECFA-DESY, Prague


    Systematic studies for tfs optimisation iii

    Systematic studies for TFS optimisation, III

    Light emission/attenuation in WLS fibres: 10,40,90 cm, BC92,BC91A,Y11

    • Study of

    • light emission and absorption in

    • commercial WLS and

    • optical clear fibres

    • adjustment of spectrum offered to PD

    • to the specific PD photocathode sensitivity

    • Niko Kakalis, FH Friedberg,

    • Diploma Thesis, Prof. Klein and VK

    16.11.02, ECFA-DESY, Prague


    Fibre fibre connection

    fibre-fibre connection

    WLSfibre to clear fibre:

    standard is gluing with optical glue

    new procedure:

    fusing, ~ 80-120oC,

    heating by 1-2 windings of resistive wire

    fibres cut, adjusted and pushed together

    in glass tube of 1.10 mm inner hole diameter

    few A current for a few sec.

    >> connection difficult to find by eye

    no light loss seen at connection

    first results: 84% transmission

    assume a large improvement potential

    is still available in this process

    16.11.02, ECFA-DESY, Prague


    More on scintillators

    more on scintillators

    • Best scintillator:

    • is BC-408 on base of Poly-Vinyl-Toluene

    • >>> 25 pe/tile(5x5 cm2) measured in Hamamatsu MA-PM

    • >>> about 600 photons on photocathode

    • but BC-408 is rather expensive,

    • need 6950 m2, ~ 36 t

    • Russian scintillators:

    • (Protvino and Vladimir)

      • production factories and good experience available

      • scintillator is 5x cheaper than Kuraray, Bicron

      • LY is about 60-70%,

      • Cleaner material: Dow Chemical STYRON 663 (P-Nr 35886)

      • better surfaces ?

    • investigations to get

    16.11.02, ECFA-DESY, Prague


    More on fibres

    more on fibres

    • ITEP:

    • Study again effect of varied fibre doting:

      • Y11(100), Y11(200), Y11(300)

      • find optimum

    • FH Friedberg:

    • Study 2 new Bicron fibres:

      • “DAYGLO”-experimental

      • BCF-99-06, red sensitive

    16.11.02, ECFA-DESY, Prague


    More on tile fibre couplings

    more on tile-fibre couplings

    This are the fibre coupling shapes

    finally selected from 10 different

    geometries.

    a,b preferred for BC-408 tiles,

    c for Russian PS tiles and

    large BC-408 tiles

    It turns out that proper

    fibre gluing in grooves is difficult,

    risk of deteriorating the smooth surface.

    b

    a

    c

    TFS wrapped with

    3M-Superreflector

    16.11.02, ECFA-DESY, Prague


    And more

    and more

    10 x 10 cm2

    PM

    • Very proper treatment

    • is important!!

    • Reproducibility?

    • Ageing?

    16.11.02, ECFA-DESY, Prague


    More on tile sizes

    more on tile sizes

    38 layers

    require

    38 different tile sizes

    casting with

    minimum number

    of moulds!

    16.11.02, ECFA-DESY, Prague


    More on photodetectors

    More on photodetectors

    • Detailed investigation of available photodetectors:

    • APD’s: gain 300-500

      • CMS-type, 5x5mm2

      • S5344, 3x3mm2, S5355, 5x5mm2

      • S8664-55, 5x5mm2

      • S8550, 32 pixels of 1.6x1.6mm2

    • Si-PM’s: gain 105

    • MEPHI, 1x1mm2,

    • MA-PM’s: gain 106

      • H8711-10, 16 pixels of 4x4mm2

      • R5900-00M16, 16 pixels of 4x4mm2

    • 800-1200 Photodetectors needed (APD or MA-PM’s)

    • 3200-4800 Si-PM’s of 1x1mm2 needed alternatively

    16.11.02, ECFA-DESY, Prague


    More on photodetectors1

    More on photodetectors

    Detailed investigation of available photodetectors

    with 55 cm2 scintillator tiles in test beams

    MIP peaks clearly separated from pedestals.

    • satisfactory performance

    • none yet tested in high field

    • several ( all ?) will be used in prototype to gain operation experience

    Hamamatsu,multianode PM,44mm2pixel

    MEPHI, Si-PM, 11 mm2 pixel

    Hamamatsu,APD, 55 mm2

    Hamamatsu,APD-array,11 mm2 pixel

    16.11.02, ECFA-DESY, Prague


    Multianode pm s

    Multianode-PM’s

    At DESY:

    Performance studies:

    H8711-10,

    16 pixels of 4x4mm2

    Pavel Murin, Stefan Valkar

    --gain variation:

    all signal within

    100-74% at 850 V

    100-70% at 800 V

    100-64% at 750 V

    100-60% at 700 V

    100-70% at 650 V

    --X-talk from 1 channel to all

    other 15 cells: 2-6%

    16.11.02, ECFA-DESY, Prague


    Si pm s mephi dark rate and mip detection

    Si-PM’s (MEPHI), dark rate and MIP detection

    From Elena Popova

    16.11.02, ECFA-DESY, Prague


    Apd s

    APD’s

    Hamamatsu, 3x3mm APD, S5344 ?

    typical performance:

    M= 50 100

    Id 600pA 1.2nA

    C 28pF 28pF

    30 samples by Jan. 2003, FOR TEST

    samples will be in S8664-55 PKG.

    60 EURO for 1500 pcs

    GAIN M

    C

    100

    Id

    10

    500 V

    16.11.02, ECFA-DESY, Prague


    More on preamplifiers

    more on preamplifiers

    • CMS/DESY

      • APD’s: trans-impedance type, tested with APD’s, cheap

      • PM’s: voltage preamps, 10x gain, from H1 FPS, cheap

    • Minsk/Protvino:

      • 2 types tested with APD and MIP’s

      • 10 preamps available

      • 100 preamps in february 2003, ~ 3 Euro/channel

      • design of 16 channel multilayer PC: ~ 8000 Euro needed

    • OPERA/Orsay/Calice ECAL:

      • prototype: ~10 mm2 preamp chip, OPERA type for APD and PMs

      • Nov./Dec. specification of modifications, Prague/Orsay activity

      • than submission of test production order, ca 4000 Euro

      • delivery May/2003 about 15 boards with 16 preamps?

    • Prague:

      • for APD’s,see Ivos talk

    16.11.02, ECFA-DESY, Prague


    The desy apd preamp test

    the DESY APD-preamp test:

    Peter Smirnov:

    APD: Hamamatsu

    S8664-55, 5x5 mm2, Ub~400V

    Ub

    Ui

    • Bias network:

    • a la H1/SPACAL, 16 channels,

    • adjust gain of individual channels

    • with MIP’s, LED?

    APD’s

    preamps

    16.11.02, ECFA-DESY, Prague


    The minical studies 1

    The MINICAL studies, 1

    • MINICAL set up, November 2002

    • Operation start up at 14.11.02

    • Position in test beam area,

    • with connections from beam-test equipment

    • 2 trigger counters, 20x20 cm2, with own PM’s,

    • movable position in stack

    • 4 tile planes with individual TFS to insert

    • Tile plane:

    • millimeter paper to ease adjustment of TFS,

    • double side glue scotch to fix TFS

    • Connection to PD’s via ~50 cm long WLS fibres

    • 16 PM-channels, =1 Hamamatsu H8711-10 first

    • than ~ 10 APD’s with CMS/DESY-preamps

    • than 1 more Hamamatsu H8711-10

    • also ~ 16 Si-PM’s

    • preamps from DESY, ITEP, Orsay, Prague

    16.11.02, ECFA-DESY, Prague


    The minical studies 2

    The MINICAL studies, 2

    • Calibration with LED pulses

      • Light pulses of a single LED distributed to PM’s

      • via additional calibration fibres

      • PM-masks (Prague) with 4mm hole,

      • to hold to 4 fibres at once:

      • (3 signal fibres from tiles, 1 LED fibre)

    • LED signal amplitude measured also

    • by a photodiode stable vs DT and DU shift

    • To study:

      • LY (>15pe)

    • Uniformity (<3-4%)

    • Gain

    • Noise separation from MIP peak (>4s)

    • Stability (<1%)

    • Calibration precision with MIP’s (< 2%)

    • Useful rates (> 0.1Hz?)

    16.11.02, ECFA-DESY, Prague


    The minical studies via web

    The MINICAL studies, via web

    Study the results of up to 64 channels with MIP’s

    • Install in minical:

    • different

    • scintillators

    • fibres

    • photodetectors

    • preamps

    • supply voltages

    • trigger conditions

    At DESY:

    LED monitoring

    Start run with

    new components

    or new settings

    all 24 hours.

    via web:

    • Look for:

    • gain

    • stability

    • signal width

    • signal noise separation

    • calibration with MIP’s

    • run parameter file

    ITEP

    LPI

    MEPHI

    Prague

    Protvino

    DESY

    ....

    very similar later during prototype running in

    16.11.02, ECFA-DESY, Prague


    Longitudinal hcal segmentation

    Longitudinal HCAL-segmentation

    Calorimeter cells

    TDR cell structure:

    3 x 3 layer cells, 5x5 cm2,

    3 x 4 layer cells, 5x5 cm2,

    2 x 5 layer cells, 10x10 cm2,

    1 x 7 layer cells, 15x15 cm2

    4 different options,with

    increasing absorber

    plate thickness

    with depth:

    4.84, 9 layers

    5.13, 8 layers

    5.22, 8 layers

    5.27 l, ,7 layers

    coil ~ 1.8 l

    16.11.02, ECFA-DESY, Prague


    The tile detector cassette

    The Tile-Detector-Cassette

    c

    a

    b

    a= 6.5 cm

    b=1.12-1.67m

    c= 2.75 m

    • The structure (from top to bottom):

      • plastic air bag layer, 500 mm ?

      • support layer (steel or C-fibre)

      • long RO fibres

      • reflector layer

      • tile-WLS fibre arrangement

      • glue

      • reflector layer

      • glue

      • support layer (steel or C-fibre)

    The structure:

    16.11.02, ECFA-DESY, Prague


    Time schedule for the hcal prototype 2003 2004 i

    time schedule for the HCAL prototype (2003/2004), I

    1. Selection of appropriate photodetectors (APD’s and Si-PM’s)

    up to January, followed by

    ordering larger quantities for tests in minical (Febr.)

    2. Selection of Russian scintillator to use, up to March

    3. find optimal cell and tile sizes,

    from software and hardware studies, decision February

    4. ordering Bicron BC-408 for the larger tile sizes,

    about 10 m2, up to February

    5. studies and development of integrated

    preamplifier/shaper circuits, up to February

    6. design of the PT stack, May

    7. building of stack steel absorber structure > August (in ITEP ?)

    16.11.02, ECFA-DESY, Prague


    Time schedule for the hcal prototype 2003 2004 ii

    time schedule for the HCAL prototype (2003/2004), II

    8. casting/machining of tiles or tile-plates up to September,

    (in factory ?, machining at DESY?)

    9. a detailed tile-plate assembly concept has to be defined (July)

    10. assembly of the TFS in detector cassettes, October

    11. connection with photodet. and preamps, November-December

    11. RO via CAMAC as long as British DAQ not available, end 2003

    12. winter 2003/2004 operation studies with LED gain monitoring,

    and calibration studies with cosmic muons

    13. setting up RO and reconstruction software up to spring 2004

    14. transport to CERN in spring 2004

    15. first test-beam runs at CERN in May/June 2004

    16.11.02, ECFA-DESY, Prague


  • Login