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Development of Silicon Sensors for Tracking Systems: MPD, CBM and [email protected] at NICA and FAIR PowerPoint PPT Presentation


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Michael Merkin SINP MSU. Development of Silicon Sensors for Tracking Systems: MPD, CBM and [email protected] at NICA and FAIR. The Facility for Antiproton and Ion Research FAIR. Primary Beams. 10 12 /s; 1.5 GeV/u; 238 U 28+ 10 10 /s 238 U 73+ up to 35 GeV/u 3x10 13 /s 30 GeV protons.

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Development of Silicon Sensors for Tracking Systems: MPD, CBM and [email protected] at NICA and FAIR

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Development of silicon sensors for tracking systems mpd cbm and bm n at nica and fair

Michael Merkin

SINP MSU

Development of Silicon Sensors for Tracking Systems:

MPD, CBM and [email protected] at NICA and FAIR

Prague, ASI Symmetries and SPIN


Development of silicon sensors for tracking systems mpd cbm and bm n at nica and fair

The Facility for Antiproton and Ion Research FAIR

Primary Beams

  • 1012/s; 1.5 GeV/u; 238U28+

  • 1010/s 238U73+ up to 35 GeV/u

  • 3x1013/s 30 GeV protons

SIS100: Au 11 A GeV

SIS300: Au 35 A GeV

p-Linac

SIS18

SIS100/300

UNILAC

Secondary Beams

  • range of radioactive beams up to 1.5 - 2 GeV/u; up to factor 10 000 higher in intensity than presently

  • antiprotons 3 - 30 GeV

HESR

Storage and Cooler Rings

  • radioactive beams

  • 1011 antiprotons 1.5 - 15 GeV/c,

  • stored and cooled

CR &RESR

APPA

Technical Challenges

NESR

100 m

  • cooled beams

  • rapid cycling superconducting magnets

  • dynamical vacuum

Prague, ASI Symmetries and SPIN


Development of silicon sensors for tracking systems mpd cbm and bm n at nica and fair

  • The [email protected] challenge :

  • to prove QGP creation through self-amplified long-range spinodial correlations

NICA

[email protected]

Booster,

Nuclotron

  • The NICA-MPD challenge :

  • to prove QGP creation in high net baryon density region

SPD

Collider

MPD

Prague, ASI Symmetries and SPIN


The bm@n experiment project

The [email protected] experiment project

  • measurements of the multistrange objects (Ξ, Ω, exotics)

    & hypernuclei in HI collisions

  • close to the threshold production in the region of high sensitivity to the models prediction

GIBS magnet (SP-41)

TS-target station,

T0- start diamond detector,

STS - silicon tracker,

ST- straw tracker,

DC- drift chambers,

RPC- resistive plate chambers,

ZDC- zero degree calorimeter,

DTE – detector of tr. energy.

Prague, ASI Symmetries and SPIN


Development of silicon sensors for tracking systems mpd cbm and bm n at nica and fair

MPD detector at NICA

Magnet :0.5 T

T0, Trigger :FFD

Centrality &

Event plane : ZDC

Stage 1 (2017)

TPC, BarrelTOF & ECAL, ZDC, FFD

Stage 2: IT + Endcaps(tracker,TOF,ECAL)

FFD

Tracking (|h|<2):TPC

PID: TOF, TPC, ECAL

0.5<p<1 GeV/c

Prague, ASI Symmetries and SPIN


The cbm experiment at fair

The CBM experiment at FAIR

Transition

Radiation

Detectors

Resistive Plate Chambers (TOF)

Ring Imaging

Cherenkov

Detector

Electro-

magnetic

Calorimeter

Silicon

Tracking

System

Projectile

Spectator

Detector

(Calorimeter)

Micro Vertex

Detector

Target

Dipole

Magnet

Muon

Detection

System

two configurations: - electron-hadron

- and muon setup

Prague, ASI Symmetries and SPIN


Tracking systems design constraints

Tracking systems design constraints

  • Coverage:

    • rapitidies from center-of mass to close to beam

    • aperture 2.5° <  < 25° (less for BM_N)

    • 4π for MPD

  • Momentum resolution

    • δp/p  1%

    • field integral 1 Tm,

    • 25 µm single-hit spatial resolution

    • material budget per station ~1% X0

    • No event pile-up

    • 10 MHz interaction rates

    • self-triggering read-out

    • signal shaping time < 20 ns

  • Efficient hit & track reconstruction

    • close to 100% hit eff.

    • > 95% track eff. for momenta >1 GeV/c

  • Minimum granularity @ hit rates < 20 MHz/cm2

    • maximum strip length compatible with hit occupancy and S/N performance

    • largest read-out pitch compatible with the required spatial resolution

  • Radiation hard sensors compatible with the CBM physics program

    • 1 × 1013neq/cm2 (SIS100)

    • 1 × 1014neq/cm2 (SIS300)

  • Integration, operation, maintenance

    • compatible with the confined space in the dipole magnet

Prague, ASI Symmetries and SPIN


Development of silicon sensors for tracking systems mpd cbm and bm n at nica and fair

System concept

  • Aperture: 2.5° <  < 25° (some stations up to 38°).

  • 8 tracking stations between 0.3 m and 1 m downstream the target.

  • Built from double-sided silicon microstrip sensors in 3 sizes, arranged in modules on a small number of different detector ladders.

  • Readout electronics outside of the physics aperture.

Prague, ASI Symmetries and SPIN


Development of silicon sensors for tracking systems mpd cbm and bm n at nica and fair

Assessment of tracking stations – material budget

station 4

electronics

sensor: 0.3% X0

r/o cables: 2×0.11% X0

side view

front view

Prague, ASI Symmetries and SPIN


Development of silicon sensors for tracking systems mpd cbm and bm n at nica and fair

Assessment of tracking stations – sensor occupancy

sensor occupancy := ratio “nb. of hit strips : nb . of all strips“ in a sensor

Y/cm

station 1

Prague, ASI Symmetries and SPIN


Development of silicon sensors for tracking systems mpd cbm and bm n at nica and fair

Assessment of tracking stations – hit cluster size

cluster of strips := number of adjacent strips in a sensor that fired simultaneously

distribution for full STS

in station 4

mean: 2.7

Prague, ASI Symmetries and SPIN


Mpd its status

MPD ITS status

NICA MPD-ITS

Th

Computer model simulations by

V.P.Kondratiev and N.Prokofiev,

SPbSU

Prague, ASI Symmetries and SPIN


Development of silicon sensors for tracking systems mpd cbm and bm n at nica and fair

Sensor development – involvement of Hamamatsu , an attempt to repeat at vendors in Russia, Belarussia, and Czech Republics

The CBM-MPD STS Consortium: change in sensor production policy – mixed DSSD SSSD structure of STS (based on experience gotton!)

SSSD-sandwich: the Consortium responsibility:

  • Hamamatsu, Japan (42х62),

  • On-SemiConductor, Czech Rep. (62х62)

  • RIMST,RF

  • “Integral”, Belorussia

  • auxiliary chipcable (SE RTIIE)

DSSD: German Party responsibility –

CiS, Erfurt (62х62)

Hamamatsu, Japan(42х62), double metal on P-side

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Microstrip sensors

Microstrip sensors

  • double-sided, p-n-n structure

  • width: 6.2 cm

  • 1024 strips at 58 m pitch

  • three types, strip lengths: 2, 4, 6 cm, 4 cm

  • stereo angle front-back-sides 7.5°

  • integrated AC-coupled read-out

  • double metal interconnects on p-side, or replacement with an external micro cable

  • operation voltage up to few hundred volts

  • radiation hardness up to 1 × 1014 neq/cm2

4” and 6” wafers, 300 µm thick

test and full-size sensors

Prague, ASI Symmetries and SPIN


Prototype microstrip sensors

Prototype microstrip sensors

under study: replacement for integrated 2nd metal layer

external on-sensor cable

CBM05

CBM05H4

CBM05H2

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Sensor n side contact pads

Sensor N-side Contact Pads

Prague, ASI Symmetries and SPIN


N side poly si resistors

N-side poly-Si resistors

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N side p stops configuration

N-side p-stops configuration

Prague, ASI Symmetries and SPIN


N side guard rings

N-side Guard Rings

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Sensor p side 1 st and 2 nd metal

Sensor P-side 1st and 2nd metal

Prague, ASI Symmetries and SPIN


Sensor p side 1 st and 2 nd metal details

Sensor P-side 1st and 2nd metal details

Prague, ASI Symmetries and SPIN


P side guard rings

P-side Guard Rings

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Irradiations studies

  • 9 structures from CiS:

    • Size 7 x 7 mm2,

    • Active area 5х5 mm2,

    • Thickness - 280 mkm

  • 6 structures from RIMST:

    • Size - 10 x 10 mm2,

    • Active area ~8 x 8 mm2,

    • Thickness 300 mkm

Irradiations Studies

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Doses

Doses

CiS:

  • 7.3х1010n/сm2,

  • 7.3х1011n/сm2,

  • 1.6х1012n/сm2,

  • 1.0х1013n/сm2,

  • 1.8х1013n/сm2,

  • 6.4х1013n/сm2

  • RIMST:

  • 1.5х1012n/сm2,

  • 1.2х1013n/сm2,

  • 2.1х1013n/сm2

Prague, ASI Symmetries and SPIN


Development of silicon sensors for tracking systems mpd cbm and bm n at nica and fair

Prague, ASI Symmetries and SPIN


Results

Results

Prague, ASI Symmetries and SPIN


Full depletion voltage

Full Depletion Voltage

Prague, ASI Symmetries and SPIN


Development of silicon sensors for tracking systems mpd cbm and bm n at nica and fair

  • Good agreement with known data on current degradation for high doses .

  • Not so good for low doses, but might be it because of mistakes in dose measurements.

  • Expected behavior for full depletion voltage

Prague, ASI Symmetries and SPIN


Readout chip sts xyter

Readout chip STS-XYTER

full-size prototype dedicated to signal detection from the double-sided microstrip sensors in the CBM environment

fast  low noise  low power dissipation

new w.r.t. n-XYTER architecture:

effective two-level discriminator scheme

design V1.0 @ AGH Kraków

UMC 180 nm CMOS

produced 2012

die size 6.5 mm × 10 mm

Prague, ASI Symmetries and SPIN


Development of silicon sensors for tracking systems mpd cbm and bm n at nica and fair

Thank you for your attention!

Prague, ASI Symmetries and SPIN


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