Post on 26-Mar-2015
Institut für Strahlenphysik Lothar Naumann www.fzd.de Mitglied der Leibniz-Gemeinschaft
CBM - Straw Tube Tracker
Multisegmented Straws:
MotivationConstructionTestHV-Front endSotware statusSummary&Outlook
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker
MuCH STT RPC
•high spatial resolution•high rate capability•high radiation length•high efficiency•high robustness •low occupancy 0.01 hit/(cm2 event)
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Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker Spacer
single straw
geometry 4 m; 4 mmrobustness highdetection efficiency 100%geom. acceptance 97%/mrate capability 4 MHz/cm2
spatial resolution 200 mradiation length 0.2 % X0
granularity > 10 cm2
occupancy > 10%
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker Spacer
single straw
single straws
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker Spacer
single straws
geom. acceptance (1-3/L[cm])100% 90% L=30cmgranularity 12 cm2
occupancy > 10%
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker Spacer
single straw
segmented straw
end-plug spacer
single straws
New development for CBM (Patent):
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker Spacer
single straw
segmented straw
end-plug spacer
spacer
x/X0 = 1 % x/X0 = 1 %
granularity 2 cm2
occupancy 2%
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker Spacer
contact resistance ~ 1 Ω
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker Spacer
length of the insensitive detector part: 2 * 5 mm
18 mm 5 mm 4.5 mm 0 mm
10 mm
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker Spacer
length of the insensitive detector part: 2 * 5 mm
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker Flex-cable
HV supply +anode signal
one connector at the wire output
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker Flex-cable
HV supply +anode signal
one connector at the wire output
~1mm
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker Flex-cable
HV supply +anode signal
one connector at the wire output
~1mm
crosstalk ~ 1% /mcapacity 20 pF /mBV 3 kVx /X0 0.1%
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker Flex-cable
signal 50/1 noise
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker Flex-cable
signal attenuation measurement, simulation < 10% /m
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker Flex cable
signal attenuation measurement < 10% /m
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker Flex-cable
geometry - a large area very thin sheet
Frontend Frontend
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker Flex-cable
HF and controlled impedance design for theHADES MDC-1 anode signal connectors
MDC-1 crosstalk 1.5% capacity 15 pF impedance 122 Ω
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker Flex-cable
multilayer PCB‘s (Stiff-Flexible-Cable) for theHADES MDC-1 anode signal connectors
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
HV connections to 32 channels
design:
-the number of HV electrical circuits is equal to the number of segmented wires
-a unit consists of 32 HV circuits
-a unit is placed on the motherboard
-advantages: easy handling (replacement, repair etc.)
-problems: high density of components (one circuit per mm) providing of sufficient BV, robustness and minimization of the leakage current
CBM - Straw Tube Tracker HV-board
1 ………………..32
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
Object realization
HV StripHV components
HVencapsulation
HV SMT components:
inexpensive;
high density and flex assembling;
But it need Hi technology in production
We have to propose to use regular single units with flex connections for segments included.
Each unit will pass assembly, cleaning, drying and full HV test before installation on the mother board.
HV robustness is the main problem!
CBM - Straw Tube Tracker HV-board
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
Unit design Multi-layer PCB ;
Opposite side is continuous GND plane;
Blind hole technology;
The unit (32x74x7 mm3) supplies 32 channels (8 tubes x 4 segments);
4 zone of incasulation
3 flex circuits go to wires;
Non soldered straw connection GND
(see Fig.3);
Output connector for Front-End electronic
Units will be installed on the mother board
1-st zone
(flex incapsulation & out)
2-nd zone
(HV components incapsulation)
3-d zone (flex incapsulation & out)
4-th zone
(HV components incapsulation)
Out connector
CBM - Straw Tube Tracker HV-board
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
The main prototype elements (area of HV circuits)
-All HV units are placed on the motherboard;
-Motherboard transfers signals and GNDs from the first segment to the HV units and is a shield for units;
-Motherboard is a common element for gas manifold and HV units box;
-Cover is a shield for units box too;
-Chain HV connections are provided by HV jumpers between units.
CBM - Straw Tube Tracker HV-board
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker (stt) Software status
Geometry and MC point generation ready
Hit Maker ready
Reconstruction:- global tracking with Kalman filter soon available- a standalone track finder under develop.
Contact person: Alexander Zinchenko
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
CBM - Straw Tube Tracker (stt) Software status
Implementation of one stt module
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
R&D successful finished for: - segmented anods - segmented straws - transmission lines
R&D not finished for: - high density readout with high potential (3 kV)
R&D for HV and gas supply started
Implementation of the Straw Tube Tracker in the CBM software started
CBM - Straw Tube Tracker Summary&Outlook
Forschungszentrum Dresden-Rossendorf, Institut für Strahlenphysik Lothar Naumann www.fzd.de
MC implementation:-input for specified hardware requirements
Prototype test:-double-layer (2*48) multifold segmented straw detector is under construction and will be tested in June/July 08
The Straw Tube Tracker with segmented straws fulfill the CBM requirements!
CBM - Straw Tube Tracker Summary&Outlook
Institut für Strahlenphysik Lothar Naumann www.fzd.de Mitglied der Leibniz-Gemeinschaft
JINR, Dubna – V. Peshekhonov, V. Lucenko, V. Mialkowski,D. Peshekhonov, A. Savenkov, K. Viryasov, A. ZinchenkoLebedev PI, Moscow – V. TikhomirovPetersburg NPI, Gatchina – D. Seliverstov, E. Chernishova, L. Kudin, A. NadtochiUniv. of Technology, Warsaw – K. Zaremba, J. MarzecFZ Jülich – P. WintzFZ Dresden - Rossendorf, – L. Naumann
GSI-INTAS-8729
CBM - Straw Tube Tracker