Sep. 17, 2003 KTB • The future GSI facility • Physics with antiprotons at the GSI future facility • The PANDA detector • Target options and vertex detector, triggers • Summary and outlook PANDA at the GSI Future Facility Kai-Thomas Brinkmann Sep. 17, 2003 VERTEX 2003 Low Wood, Lake Windermere supported by BMBF
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Sep. 17, 2003KTB The future GSI facility Physics with antiprotons at the GSI future facility The PANDA detector Target options and vertex detector, triggers.
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Sep. 17, 2003 KTB
• The future GSI facility
• Physics with antiprotons at the GSI future facility
• The PANDA detector
• Target options and vertex detector, triggers
• Summary and outlook
PANDA at the GSI Future Facility
Kai-Thomas Brinkmann
Sep. 17, 2003
VERTEX 2003
Low Wood, Lake Windermere
supported by BMBF
Sep. 17, 2003 KTB
Press Release 16/2003, http://www.bmbf.de
05.02.2003
Bulmahn gives green light for large-scale research equipment "We are securing an international top position for German basic research"
...Basic research in the natural sciences has a long tradition in Germany. Its success is inseparably linked with the use of large-scale equipment at national and international research centres. "With the new concept, basic research in Germany will start from an excellent position when entering a new decade of successful work", Minister Bulmahn said.
Together with European partners, the Gesellschaft für Schwerionenforschung (GSI) in Darmstadt shall extend its equipment in a phased approach and become a leading European physics centre. At least 25% of the costs amounting to €675 million are to be supplied by foreign partners.
• Barrel and forward disk structures• Smallest possible inner radius• Fast readout
Sep. 17, 2003 KTB
7.2M barrel pixels, 50 μm x 300 μm
2M forward pixels, 100 μm x 150 μm
5 layers, 200 μm thick sensors (0.25%X0)
Bump-bonded readout, 300 µm thick (0.37% X0)
Detectors: Inner VertexDetectors: Inner Vertex
forward wheels
pixels 100 µm X 150 µm
beam pipe
pelle
t pip
e
barrel
pixels 50 µm X 300 µm
ToF
total area < 0.2 m2
Sep. 17, 2003 KTB
Radial deviation Longitudinal dev.
tracky
x
z
µm51D µm82Z
p)GeV5.8(p
KTB April 24, 2003
Detectors: Inner VertexDetectors: Inner Vertex
Sep. 17, 2003 KTB
Detectors: Inner VertexDetectors: Inner Vertex
Micro-vertex detector optimisation
Minimum distance to vertex “point”
Beam pipe diameter needed for accelerator reasons, exhaust rate of targets, radiation load
Number of track points
Detector thickness (scattering, conversion)
Pixel size Extrapolation of present-day technology;
estimation of potential of technologies which are currently under development
Sep. 17, 2003 KTB
Detectors: Inner VertexDetectors: Inner Vertex
Micro-vertex detector optimisation
distance / mm
Change in beam pipe diameter2 cm 4 cm(may be neededfor vacuum and pumping)
p)GeV2Pc(p
Sep. 17, 2003 KTB
Detectors: Inner VertexDetectors: Inner Vertex
Barrel 90 staves, forward 120 staves
Thickness: staves 0.32% X0
cooling 0.4% X0
TOTAL 0.96% to 3.6% X0
Beam pipe now BeAl alloy, 500 µm
Sep. 17, 2003 KTB
Detectors: Inner VertexDetectors: Inner Vertex
Present round of
simulations
(A. Sokolov, GSI)
Conversion probabilities (from pp 30 at 8 GeV/c)
Beam pipe 0.9%
Vertex detector 3.1%
Straw tracker 3.5% (2% from support)
DIRC 20%
Sep. 17, 2003 KTB
Detectors: Inner VertexDetectors: Inner Vertex
/ deg / deg
/ m
m
/ m
m
Spatial
resolution
Layer (or disk) number
Detector Resolution [m]
Multiple scattering for different polar angles [m]
Z(R) 90o 30o 9o
1 12 (40) 70 (25) 0 0 8
2 12 (40) 70 (25) 5 14 35
3 12 (40) 70 (25) 13 38 120
4 70 (40) 12 (25) 26 68 180
5 70 (40) 12 (25) 45 132 250
Multiple scattering of µ with Pc = 1 GeV
Sep. 17, 2003 KTB
Detectors: Inner VertexDetectors: Inner Vertex
Modification of pixel orientation (size 50 µm x 400 µm)
1st and 3rd – 5th layers with pads to beam
2nd layer || to beam direction
Pad intrinsic resolution 12 µm x 70 µm
Mean resolution for pp4 events at 8 GeV
Sep. 17, 2003 KTB
Detectors: Inner VertexDetectors: Inner Vertex
(3770) D+D- K++K-+2++2-
D [mm] Z [mm]
Only longitudinal coordinate sensitive to D-mesons
Sep. 17, 2003 KTB
8 GeV/c
Detectors: Inner VertexDetectors: Inner Vertex
Sep. 17, 2003 KTB
other theof Capture
one ofDetection
pp
HypernucleiHypernuclei
Sep. 17, 2003 KTB
Detectors: Inner VertexDetectors: Inner Vertex
Considerations on radiation hardness
Multiplicity of neutrons/protons, p+Fe, 7 GeV/c, about 10 (total particle multiplicity 30)
[UrQMD, Galoyan&Polanski hep-ph/0304196]
Neutron flux: HI targets aiming at 107 interactions/s, Mn = 10
=> Φn 106 cm-2s-1 in innermost layer (r = 1 cm)
3·1013 neutrons per year, probably less in case of Hydrogen targets
Sep. 17, 2003 KTB
DAQ and TriggerDAQ and Trigger
• Self-triggered detector readout• Flash ADCs • Synchronization via distributed clock, 50 ps resolution• NO trigger signals, but FPGA-based flexible data reduction, feature extraction and filtering on the fly• High-performance computer nodes and high-bandwidth connections, Gbit Ethernet• Hardware: PC memories and FPGAs
Self-Triggered Data Push Architecture to allow parallel selection of different event types
Sep. 17, 2003 KTB
SummarySummary
PANDA @ GSI will have a rich physics programme.
A broad range of physics topics will be covered with one multi-purpose detector setup.
For most of these topics, a micro-vertex detector is essential.
Studies for the detector layout are under way.Also under investigation: alternative designs, e.g. employing MAPS and/or strip detectors.
Sep. 17, 2003 KTB
U BochumU BonnU & INFN BresciaU CataniaU CracowGSI Darmstadt TU DresdenJINR Dubna I + IIU ErlangenNWU EvanstonU & INFN FerraraU FrankfurtLNF-INFN FrascatiU & INFN GenovaU GlasgowU Gießen
KVI Groningen IKP Jülich I + IIU KatowiceLANL Los AlamosU MainzTU MünchenU MünsterBINP NovosibirskU PaviaU of SilesiaU TorinoPolitechnico di TorinoU & INFN TriesteU TübingenU & TSL UppsalaÖAdW ViennaSINS Warsaw