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CBM. Status of the Silicon Tracking System. Johann M. Heuser, GSI Darmstadt CBM Collaboration Meeting JINR Dubna, 16 October 2008. Joint STS-MVD Workgroup Meeting. Wide range of topics/activities: Simulation studies refined ... Detector R&D ... First in-beam test ...

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slide1

CBM

Status of the Silicon Tracking System

Johann M. Heuser, GSI Darmstadt

CBM Collaboration Meeting JINR Dubna, 16 October 2008

J.M. Heuser − Status of the Silicon Tracking System

slide2

Joint STS-MVD Workgroup Meeting

Wide range of topics/activities:

Simulation studies refined ...

Detector R&D ...

First in-beam test ...

R&D on module demonstrators ...

System engineering ...

Project planning ...

IMoU – first draft ...

J.M. Heuser − Status of the Silicon Tracking System

sts detector simulations
STS Detector - simulations
  • - low-mass
  • - 8 tracking stations
  • - full azimuthal angle coverage
  • - polar angle coverage:
  • from 2.5° to 25°
  • high track density in inner region
  • high collision rate
  • vertical magnetic field

talk by R. Karabowicz

J.M. Heuser − Status of the Silicon Tracking System

stations overlaps vs gaps
Stations: Overlaps vs gaps

gaps

Example:station #3 at z=40cm

39.65 40 40.35

overlaps

intermediate

J.M. Heuser − Status of the Silicon Tracking System

tracking efficiency
Tracking efficiency

Overlaps

Gaps

overall efficiency

1 gap, 2 gaps

1 overlap, 2 overlaps

do not change tracking efficiency

do change tracking efficiency

Work done by the GSI

Summer Student

Maksym Zyzak from

National University, Kyiv

J.M. Heuser − Status of the Silicon Tracking System

momentum resolution
Momentum resolution

Overlaps

Gaps

overall resolution

1 gap, 2 gaps

1 overlap, 2 overlaps

do not change momentum resolution

do change resolution

Work done by the GSI

Summer Student

Maksym Zyzak from

National University, Kyiv

J.M. Heuser − Status of the Silicon Tracking System

hit density

Realistic detector response

Hit density

Cluster length

1.4-2.3 strips

0-31 hits/cm2

Hit finding efficiency

Strip occupancy

54-99%

<eff> = 91.9%

0-11%

J.M. Heuser − Status of the Silicon Tracking System

slide8

Main sensor

Double-sided, 1024 strips per side, 50 µm pitch, 15º stereo angle, full-area sensitive, size: 5656 mm2

“Baby” sensors

Double-sided, 256256 strips, orthogonal, 50(80) µm pitch, size: 15.615.6 mm2

Detector R&D: CIS-GSI wafer CBM01

4" wafer, 285 µm n-type Si double metal layer

CBM01B1

CBM01B2

CBM01

J.M. Heuser − Status of the Silicon Tracking System

slide9

GSI: Quality test of AC strip insulation

A. Lymanets

CBM01B2:

DC-pad, bias pad

Test series

AC-pad, bias pad

AC-DC

neighboring

AC pads

Probe station at DiamondLab, GSI

Procedure:

applied 1 V with contact needles, measured the current  resistance derived

Probe station in MVD Group, IKF Frankfurt

J.M. Heuser − Status of the Silicon Tracking System

slide10

R (Ω)

Detector type: CBM01B2

Wafer: 270529-4

10 k

AC-bias ring insulation

p-side

strip #

first part of production (almost) good 

selected for test boards/beam test

R (Ω)

AC-bias ring insulation

n-side

Warm thanks to summer student

Andrzej Wilczek, Kattowicz, for help

strip #

J.M. Heuser − Status of the Silicon Tracking System

slide11

R (Ω)

Detector type: CBM01B2

Wafer: 270529-19

10 k

AC-bias ring insulation

p-side

strip #

R (Ω)

second part of production bad 

n-side

AC-DC insulation

strip #

J.M. Heuser − Status of the Silicon Tracking System

ihep protvino test of cbm01 main detector
IHEP Protvino — Test of CBM01 main detector

A. Vorobiev

CBM01 – so far results from n-side ... work in progress

J.M. Heuser − Status of the Silicon Tracking System

slide13

CIS-GSI "technology wafer" CBM02

At GSI:

5  8 baby detectors

a la type "B2"

2 tested so far on AC insulator quality:

OK

more to be tested

A. Lymanets

J.M. Heuser − Status of the Silicon Tracking System

detector tests at kinr kiev
Detector tests at KINR Kiev

V. Pugatch

CBM01-B2-sensor

50,7 μm – pitch

Double-sided

Sensor is glued to the AEROPLAST

Carbon fiber supporting frame

Microcables are bonded to sensor pads:

Even strips – to one side;

odd strips to the opposite side

LEMO connectors are soldered

by wires to large pads on microcables

J.M. Heuser − Status of the Silicon Tracking System

slide15

Module support frame studies

Micro cables

Cooling infra-structure

J.M. Heuser − Status of the Silicon Tracking System

laser test setup at kinr
Laser test setup at KINR

4th year students from

Kiev University –

Measuring η-function

For the CBM-01 sensor

J.M. Heuser − Status of the Silicon Tracking System

slide17

Detector design @ SINP-MSU

  • Sensor size 62.0 (?) X 42.0 mm2
  • Active area 59392 (60416) X 40000 mkm2
  • Number of strips on both sides – 1024
  • Strip pitch – 58.0 mkm (59 mkm)
  • Stereo angle - ±7.5o
  • P-side – double metal with short strips connection
  • N-side single metal

M. Merkin

J.M. Heuser − Status of the Silicon Tracking System

slide18

R&D ON MICRO-CABLES FOR BABY SENSOR RADIATION TEST MODULE

S. Borshchov

demonstrator 0b ... produced

demonstrator 1

Wire-bonding

(Pitch 50.7um)

Sensor

Double-deck analog cable

TAB-bonding

(Pitch 120um)

Front-End Board

J.M. Heuser − Status of the Silicon Tracking System

slide19

First CBM Detector System Beam Test

Parasitic to the HADES beam time: 8h*) 2.3 GeV proton beam

Location: GSI, Cave C

J.M. Heuser − Status of the Silicon Tracking System

slide20

Testbeam Setup

  • 3 CBM experiments (STS, GEM, FPGA + DAQ)
  • 1 standalone PANDA experiment (DIRC)

beam diagnostics box

design and construction: W. Niebur, GSI

J.M. Heuser − Status of the Silicon Tracking System

slide21

STS Test Setup – "Plan A"

reference tracking station

postponed to 2009

CBM01B1

CBM01B2

CBM01

J.M. Heuser − Status of the Silicon Tracking System

slide22

CBM01B2 test detectors, GSI-CIS 8/2007

4" wafer, 285 µm Si

mounted on test boards

32 strips to connector

CBM01B1

CBM01B2

CBM01

first multi-purpose tool for detector tests, 2/2008

J.M. Heuser − Status of the Silicon Tracking System

slide23

STS Test Setup – "Plan B"

FEB1nxGen rev. B

FEB1nxGen rev. B

32 of 64 ch

32 of 64 ch

32 of 64 ch

32 of 64 ch

ROC

pos. signals

CBM01B2 Test board

32 strips bonded on p-side

CBM01B2

overlap area strips p-n side: 1.6 × 1.6 mm2

32 strips bonded on n-side

neg. signals

J.M. Heuser − Status of the Silicon Tracking System

slide24

Preparation of STS test beam box – September 2008

Holders of two microstrip detector test boards (10 cm  10 cm) and two front-end boards (one mounted board shown).

rotation w.r.t. beam:

study of cluster size

Al box, 40 cm  40 cm  20 cm. Covers removed. Legs ~ 50 cm high lift the box from a table to the beam line.

Mechanics designed and prepared by Wolfgang Niebur et al., GSI

J.M. Heuser − Status of the Silicon Tracking System

slide25

on the beam line:

2 detectors CBM01B2

2 FEB-1nx-gen rev B

2 ROCs

power supplies

J.M. Heuser − Status of the Silicon Tracking System

slide26

Successful test of CBM prototype detector systems with self-triggering read-out electronics using proton beams atGSI, September 28-30, 2008

GSI and AGH Krakow

KIP Heidelberg

VECC Kolkata

2 Double-sided silicon microstrip detectors

Double and triple GEM detectors

Radiation tolerance studies

Full readout and analysis chain:

Go4

online

Detector signals

Analysis

Front-end board with self-triggering n-XYTER chip

Data Acquisition System

Readout controller

offline

slide27

Detector commissioning:

Operation on the beam line:

90Sr -spectra ...

Correlation of fired channels in two silicon microstrip detectors

... in several channels of a silicon microstrip detector

... and in a GEM detector

Beam spot seen on a GEM detector (every 2nd channel read out)

Participants:

GSI, Darmstadt, GermanyJINR, Dubna, RussiaKIP, Heidelberg, GermanyVECC, Kolkata, IndiaAGH, Krakow, Poland

www-cbm.gsi.de

slide29

The Data

http://cbm-wiki.gsi.de/cgi-bin/view/Beamtime/BeamTimeGsiSep2008Data

29 runs 50 GB Data

digging into the data just beginning ...

... first STS plots by P. Nomokonov, JINR;... presentation by R. Karabowicz

J.M. Heuser − Status of the Silicon Tracking System

slide30

Engineering of STS module demonstrators and stations

S. Igolkin

J.M. Heuser − Status of the Silicon Tracking System

slide31

R&D on STS system integration

S. Belogurov, A. Semennikov

J.M. Heuser − Status of the Silicon Tracking System

slide32

R&D cooperations, tasks

CBM-MPD STS Consortium:2008 - 2010

JINR-SINP-KRI-SPbSU-SESRITIIE-BTI-IHEP-GSI

FP7 HadronPhysics2 JRA: 9/2007Proposal: “Ultra-thin silicon tracking and vertex detection systems“

2009-mid 2011 spokesperson: J.H.

... 3 sub-projects ... accepted by HadronPhysics2 ... accepted by EC ... finalization of contract awaited ... start Jan. 2009

R&D on demonstrators of the CBM STS module ... very active research program

therein embedded:

ISTC project # 3540: “CBM Silicon Tracker“ (GSI, KRI St. Petersburg, MSU Moscow, IPHC Strasbourg)

Finnland:FAIR member state, in-kind contribution to CBM, PANDA, EXL, R3B

"single or double-sided rad-hard microstrip detectors"

project under definition

GSI R&D cooperations:

GSI-Kiev Inst. for Nucl. Research

J.M. Heuser − Status of the Silicon Tracking System

slide33

Summary

  • Many research activities on the STS ongoing:
  • ... from simulations ... over detector R&D ... to system design ...
  • True milestone reached: First successful in-beam system test
  • Project planning progressing for the R&D phase up to the TDR
  • Groups and tasks are forming
  • IMoU – first draft existing
  • Important motivation for our work: CBM needs the STS available from "day-1 physics" at SIS100
  • (see Peter Senger\'s introductory presentation, 14.10.2008)

J.M. Heuser − Status of the Silicon Tracking System

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