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
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
JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003
Total area: ~ 400 sq. m
Clean rooms: ~120 sq. m (class 10.000)
Climate facility :(temperature and humidity control)
NEW WINDING MACHINE, CLEAN ROOM
Winding machineUnder PC control ( ~20 )Max. size: 2 m
JINR participation on the experimental program at GSI future facility 20-21 Nov., 2003
Clean room
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)__________________________________________________
• 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 facility 20 – 21 Nov., 2003
HADES PROJECT (JINR Participation)
JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003
Hit findingsoftware
Track fitting software
Front End Electronics (Ampl./Discr.)
6 multilayerlow-massDrift ChambersPlane-2
Fast Gas Detectors
Yu. 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)
JINR participation on the experimental program at GSI future facility 20-21 Nov., 2003
University (Muenster)
JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003
Micromegas(MICROMEsh GAseous Structure)
Conversion gap: 3mm Gas: Ne+10% C4H10Amplification gap: 100 mkm (1 or 2 stage)
Drift gap – 8 mmTransfer gap – 2 mmInduction gap – 2 mm
JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003
Gas Electron Multiplier(GEM)
ЛВЭ ЛВЭ
F.Sauli, Nucl. Instr. Meth. A 461 (2001), 47-54
Electron microscope picture of a GEM foil Electron microscope view of a cross-section through one hole
GEM
Cu / KAPTON / Cu - 5/50/5 mkmPitch – 140 mkmHole – 70 mkmCenter – 45 mkm
JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003
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
GAS DETECTOR BASED on 2 GEM MESH
VD = 3560 VV1U = 2150 VV1D = 1800 VV2U = 1050 VV2D = 700 V
Ar - CH4 / 80 – 20
ΔVGEM1 = 350 VΔVGEM2 = 350 V
Fe-55
8mm
2mm
2mm
JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003
Test of 2 cascade GEM at LHE JINR
Superconducting Dipole Magnet for CBM
E.Matyushevsky, P.Akishin, Z.Borisovskaya, A.Shabunov (JINR)
M.Turani (GSI)
JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003
• BY integral: 1-2 Tm
• Acceptance: 50° (vert.) and 60° (horiz.)
• Gap: ~ 1m
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
JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003
Superconducting Dipole Magnet for CBM
General view
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
Superconducting Dipole Magnet for CBM
A proposed possibleversion 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
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
Superconducting Dipole Magnet for CBM
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
JINR participation on the experimental program at GSI future facility 20 – 21 Nov., 2003
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