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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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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


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


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


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


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


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


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


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


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

Prague, ASI Symmetries and SPIN


Microstrip sensors
Microstrip sensors to repeat at vendors in Russia, Belarussia, and Czech Republics

  • 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 to repeat at vendors in Russia, Belarussia, and Czech Republicsmicrostrip sensors

under study: replacement for integrated 2nd metal layer

external on-sensor cable

CBM05

CBM05H4

CBM05H2

Prague, ASI Symmetries and SPIN


Sensor n side contact pads
Sensor N-side Contact Pads to repeat at vendors in Russia, Belarussia, and Czech Republics

Prague, ASI Symmetries and SPIN


N side poly si resistors
N-side poly-Si resistors to repeat at vendors in Russia, Belarussia, and Czech Republics

Prague, ASI Symmetries and SPIN


N side p stops configuration
N to repeat at vendors in Russia, Belarussia, and Czech Republics-side p-stops configuration

Prague, ASI Symmetries and SPIN


N side guard rings
N to repeat at vendors in Russia, Belarussia, and Czech Republics-side Guard Rings

Prague, ASI Symmetries and SPIN


Sensor p side 1 st and 2 nd metal
Sensor P-side 1 to repeat at vendors in Russia, Belarussia, and Czech Republicsst and 2nd metal

Prague, ASI Symmetries and SPIN


Sensor p side 1 st and 2 nd metal details
Sensor P-side 1 to repeat at vendors in Russia, Belarussia, and Czech Republicsst and 2nd metal details

Prague, ASI Symmetries and SPIN


P side guard rings
P to repeat at vendors in Russia, Belarussia, and Czech Republics-side Guard Rings

Prague, ASI Symmetries and SPIN


Irradiations studies

  • 9 structures from CiS: to repeat at vendors in Russia, Belarussia, and Czech Republics

    • 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

Prague, ASI Symmetries and SPIN


Doses
Doses to repeat at vendors in Russia, Belarussia, and Czech Republics

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


Prague, ASI Symmetries and SPIN to repeat at vendors in Russia, Belarussia, and Czech Republics


Results
Results to repeat at vendors in Russia, Belarussia, and Czech Republics

Prague, ASI Symmetries and SPIN


Full depletion voltage
Full Depletion Voltage to repeat at vendors in Russia, Belarussia, and Czech Republics

Prague, ASI Symmetries and SPIN


Prague, ASI Symmetries and SPIN


Readout chip sts xyter
Readout chip high doses .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


Thank you for your attention! high doses .

Prague, ASI Symmetries and SPIN


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