CBM-MPD STS consortium – status of activities

Yuri Murin for the Consortium

– Engineering of STS module, ladder, station– Cooling system concept and plans for

prototyping– Demonstrator development– Sensor development– Radiation hardness certification– Preparations for the in-beam tests – Infrastucture improvement – Networking

Engineering of STS module, ladder, station

– Ladders: Engineering of the non-central ladders is accomplished with ANSIS calculations of mechanical properties of CF space forms manufactured of prepregs with different Young modulus (Report)

– Modules: See Demonstrator plans

– Station: Base technical solutions is defined

Sag and mass of the frame as a function of carbon fiber type

5

15

25

35

M55J M50J M46J M40J

Type of carbon fiber

Sa

g, m

icro

ns

7,5

7,65

7,8

7,95

ma

ss

, g

Uz Uy mass

Demonstrator development (SE SERTIIE)

– Three types of demonstrators in production phase

– Two more types are discussed

Demonstrator 0-b Multi-layer connecting board

Cooling system concept and plans for prototyping

– ANSYS calculation with cooling of sensors with different gases (Report)

– Plans for the first cooling Demonstrator#1

Sensor development within ISTC Project

(SINP MSU and RIMST )

– Photomasks for first pilot batch of CBM STS sensors of size 40 • 60 mm2

– First 10 wafers for cabling mock-ups manufactured

– Sensors are expected in April 2010

Radiation hardness certification (KRI and SINP MSU)

– Irradiation of pad test structures (CIS and RIMST) for adjusting the procedures is accomplished

– 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

– We are almost ready for real work!!!

FDV of irradiated test structures VS neutron fluence

(after anniling 80min. at +600C)

0

20

40

60

80

1.0E+10 1.0E+11 1.0E+12 1.0E+13 1.0E+14

Fluence (n/cm2)

Vfd

(V

)

CBM test structure #41m,51m,61m(~5x5mm2)

MSU test structure #66,68(~9x9mm2)

Fit (initial Vfd=80V)

Fit (initial Vfd=25V)

Preparations for the in-beam tests

– Ru-106 source + Demonstrator-0B-bench tests (on going) – Slow Control System for in-beam tests (accomplished)

Infrastucture improvement

– Procurement of bonding automat for SE SRTIIE by JINR – Continuation of restoration of rooms to house ladder assembling lab

at JINR

Networking

– Organization of the 3-d Work Meeting in Karelia – Plans for the 4-th Work Meeting in Germany

Urgent task #1

– Simulations of realistic STS with central 4 rad/hard sensors with R-φ topology

– Size of the quadrant 60x60 with 1024 strips of each kind

Urgent task #2

– Let’s start to resolve “the station ##1-2 problem” and simulate disc-like stations #1 and #2 built of 24 wedges each

Final remark

– We are speeding into engineering phase aware that it will take 4-5 years to raise STS up

– Neighboring STS work packages i.e. “the pipe” and “the FEE board” defining the crucial numbers for us are well behind and should be accelerated by all means

– Thanks to all for the attention!

Acknowledgments to all Consortium members for their contributions!