Research and development for cbm at lhe jinr
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RESEARCH and DEVELOPMENT for CBM (at LHE JINR). Yu.V. Zanevsky Laboratory of High Energies JINR, Dubna. - NEW INFRASTRUCTURE - FAST GAS DETECTORS - DIPOLE SUPERCONDUCTING MAGNET.

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RESEARCH and DEVELOPMENT for CBM (at LHE JINR)

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Research and development for cbm at lhe jinr

RESEARCH and DEVELOPMENT for CBM (at LHE JINR)

Yu.V. Zanevsky

Laboratory of High Energies JINR, Dubna

- NEW INFRASTRUCTURE

- FAST GAS DETECTORS

- DIPOLE SUPERCONDUCTING MAGNET

JINR participation on the experimental program at GSI future facility 20-21 Nov., 2003


Infrastructure in lhe jinr

INFRASTRUCTURE in LHE JINR

We have a present-day infrastructure for the R&D and construction of gas

detectors:

- winding machines

- clean rooms

- measurement devices

- Front End Electronics

- special tables e.t.c.

Our previous infrastructure was successfully used for the HADES project.

A new Detector Lab. wiil be employed firstly for the TRD / ALICE.

http://lhedl.jinr.ru/

JINR participation on the experimental program at GSI future facility 20-21 Nov., 2003


New detector laboratory at lhe jinr

NEW DETECTOR LABORATORY at LHE JINR

Total area: ~ 400 sq. m

Clean rooms: ~120 sq. m

(class 10.000)

Climate facility :

(temperature and humidity

control)

JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003


New winding machine clean room

NEW WINDING MACHINE, CLEAN ROOM

Winding machine

Under PC control

( ~20 )

Max. size: 2 m

Clean room

JINR participation on the experimental program at GSI future facility20-21 Nov., 2003


High acceptance di electron spectrometer hades

High Acceptance Di- Electron Spectrometer (HADES)

JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003


Main parameters of hades drift chambers plane 2

Main parameters of HADES drift chambers (plane-2)__________________________________________________

  • 6 trapezoidal low mass mini drift chambers (modules) were constructed at LHE JINR ( including R&D and Prototyping ) for Plane-2 of the HADES Spectrometer. Each module has an active area ~ 0,5 m2 and contains 6 drift chambers with different angle of winding.

  • Gas mixture – He + Isobutan, Cathode and Field wires performed from annealed Al wires. It reduces the radiation length x/Xo per chamber below 5 x 10-4

  • Max. drift time ~ 80 ns

  • Efficiency ~ 99 % (with high multiplicity)

  • Position resolution (track fit for 2 chambers) ~ 39 mkm

JINR participation on the experimental program at GSI future facility20 – 21 Nov., 2003


Hades project jinr participation

HADES PROJECT (JINR Participation)

6 multilayer

low-mass

Drift Chambers

Plane-2

Front End Electronics (Ampl./Discr.)

Hit finding

software

Track fitting

software

JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003


Fast gas detectors yu zanevsky s chernenko v golovatjuk l smykov v zrjuev lhe jinr dubna

Fast Gas DetectorsYu. Zanevsky, S. Chernenko, V. Golovatjuk, L. Smykov, V. Zrjuev,(LHE JINR, Dubna)

Scope of the Project:

To develop:

• large area (~ 2 x 2 m ² )

• high granularity

• low mass

• high speed ( ~ 10 5 / cm²s)

Gas Detectors

In this project participate also:

GSI (Darmstadt), INFN (Frascati),NC PHEC (Minsk)

University (Muenster)

JINR participation on the experimental program at GSI future facility 20-21 Nov., 2003


Research and development for cbm at lhe jinr

Micromegas

(MICROMEsh GAseous Structure)

Conversion gap: 3mm Gas: Ne+10% C4H10

Amplification gap: 100 mkm (1 or 2 stage)

JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003


Research and development for cbm at lhe jinr

Gas Electron Multiplier

(GEM)

ЛВЭ

ЛВЭ

Drift gap – 8 mm

Transfer gap – 2 mm

Induction gap – 2 mm

F.Sauli, Nucl. Instr. Meth. A 461 (2001), 47-54

JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003


Research and development for cbm at lhe jinr

Electron microscope picture of a GEM foil

Electron microscope view of a cross-section through one hole

GEM

Cu / KAPTON / Cu - 5/50/5 mkm

Pitch – 140 mkm

Hole – 70 mkm

Center – 45 mkm

C. Altunbas et al. Nucl .Instr. Meth.

A 490 (2002), 177-203

JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003


Research and development for cbm at lhe jinr

GAS DETECTOR BASED on 2 GEM MESH

JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003


Research and development for cbm at lhe jinr

Test of 2 cascade GEM at LHE JINR

Ar - CH4 / 80 – 20

ΔVGEM1 = 350 V

ΔVGEM2 = 350 V

Fe-55

VD = 3560 V

V1U = 2150 V

V1D = 1800 V

V2U = 1050 V

V2D = 700 V

8mm

2mm

2mm

JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003


Superconducting dipole magnet for cbm

Superconducting Dipole Magnet for CBM

E.Matyushevsky, P.Akishin, Z.Borisovskaya, A.Shabunov (JINR)

M.Turani (GSI)

• BY integral:1-2 Tm

• Acceptance: 50° (vert.) and 60° (horiz.)

• Gap: ~ 1m

JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003


Research and development for cbm at lhe jinr

Superconducting Dipole Magnet for CBM

Gap: ~ 1 m

SP coils: 4 half Circles, dia. 1 m, (double pancake)

Current: ~ 3000 A

BY integral (Y=0) ~ 1,12 Tm

Weight: ~76 tons

General view

JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003


Research and development for cbm at lhe jinr

Superconducting Dipole Magnet for CBM

Color map of the basic dipole magnetic field component in the median plane

JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003


Research and development for cbm at lhe jinr

Superconducting Dipole Magnet for CBM

A proposed possible

version of dipole magnet:

- the same current and

number of Amper x

turns;

- the same acceptance;

- BY integral (y=0) 2,44 Tm.

9/Nov 2003 23:55:43

JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003


Research and development for cbm at lhe jinr

Superconducting Dipole Magnet for CBM

Cut of the magnet

10/Nov 2003 00:08:49

JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003


Conclusions

CONCLUSIONS

1. The R&D work on the fast gas detectors is in progress at LHE JINR

2. Fast gas detector based on the GEM (2 cascade) is under the testing

3. The work on the simulation of Dipole Superconducting Magnet is in progress

JINRparticipation on the experimental program at GSI future facility20 – 21 Nov., 2003


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