Difference: GeneralDescription (1 vs. 11)

Revision 11
23 May 2014 - Main.PeterWintz
Line: 1 to 1
 
META TOPICPARENT name="WebHome"

General Description

Line: 12 to 12
  STT 3-D view

STT Dimensions
Changed:
<
<
Inner radius 15 cm
Outer radius 42 cm
>
>
Inner radius 15.0 cm
Outer radius 41.8 cm
 
Total length 171 cm
Added:
>
>
Semi-barrel gap (vertical) 5.0 cm
 
Material budget (radial) 1.23 % (X/X0)

Specifications
Revision 10
13 May 2014 - Main.PeterWintz
Line: 1 to 1
 
META TOPICPARENT name="WebHome"

General Description

Line: 24 to 24
 
Straw pitch 10.14 mm
Straw film tube Mylar (aluminised)
Straw wall thickness 27 µm
Changed:
<
<
Sense wire W/Rh
>
>
Sense wire W/Re
 
Wire diameter 20 µm
Number of axial layers 15-19
Number of stereo layers 8
Revision 9
27 Mar 2014 - Main.PeterWintz
Line: 1 to 1
 
META TOPICPARENT name="WebHome"

General Description

-- PeterWintz - 04 Nov 2013
Changed:
<
<
STT x-y view
>
>
STT x-y view
  The central Straw Tube Tracker (STT) in the PANDA target spectrometer features a high-resolution spatial and momentum reconstruction of charged particle trajectories in a broad momentum range from about 100 MeV/c to 8 GeV/c. In addition, a particle identification of protons, kaons, and pions in the momentum region below 1 GeV/c has to be done exclusively by the STT, with a measurement of the particles' specific energy-loss. The STT design is optimised for a minimal material budget by the technique of self-supporting straw layer modules. The detector is essential for the online track reconstruction and track association to events in the PANDA specific environment of about 150 tracks from 40 individual events within 2 µs.

The detector consists of 4636 straw tubes, each with a length of 1400 mm and 10 mm inner diameter. The wall thickness of the aluminised mylar film tube is 27 µm. The tubes are pressurized to 1 bar overpressure (2 bar absolute pressure) and glued together to close-packed, self-supporting multi-layers which sustain the wire tension and tube stretching equivalent to 230 kg and 3.2 tons (sum for 4636 tubes). The straws are arranged in two semi-barrels around the beam pipe with a few cm gap to leave space for the vertical target pipe.
Changed:
<
<
STT 3-D view
>
>
STT 3-D view
 

STT Dimensions
Inner radius 15 cm
Line: 21 to 21
 
Number of straws 4636
Straw length 1400 mm
Straw diameter (inner) 10 mm
Changed:
<
<
Straw pitch 10.12 mm
>
>
Straw pitch 10.14 mm
 
Straw film tube Mylar (aluminised)
Straw wall thickness 27 µm
Sense wire W/Rh
Line: 33 to 33
 
Gas pressure 2 bar (absolute)
Maximum drift time (2T-field) ~ 200 ns
Spatial resolution (sigma) 150 µm (xy), 2-3 mm (z)
Changed:
<
<
Energy resolution (dE/dx) < 10 %
>
>
Energy resolution (dE/dx) < 10 %
Maximum rate (innermost layer) < 1 MHz/straw, < 7-14 kHz/cm
Mean charge load 0.2 C / cm
  Back to STT.WebHome

META FILEATTACHMENT attr="" comment="STT x-y view" date="1383574454" name="STT_xyview.jpg" path="STT_xyview.jpg" size="54215" user="PeterWintz" version="1.1"
Revision 8
07 Nov 2013 - Main.PeterWintz
Line: 1 to 1
 
META TOPICPARENT name="WebHome"

General Description

Line: 18 to 18
 
Material budget (radial) 1.23 % (X/X0)

Specifications
Changed:
<
<
Straw number 4636
>
>
Number of straws 4636
 
Straw length 1400 mm
Straw diameter (inner) 10 mm
Straw pitch 10.12 mm
Revision 7
05 Nov 2013 - Main.PeterWintz
Line: 1 to 1
 
META TOPICPARENT name="WebHome"

General Description

Line: 7 to 7
  STT x-y view The central Straw Tube Tracker (STT) in the PANDA target spectrometer features a high-resolution spatial and momentum reconstruction of charged particle trajectories in a broad momentum range from about 100 MeV/c to 8 GeV/c. In addition, a particle identification of protons, kaons, and pions in the momentum region below 1 GeV/c has to be done exclusively by the STT, with a measurement of the particles' specific energy-loss. The STT design is optimised for a minimal material budget by the technique of self-supporting straw layer modules. The detector is essential for the online track reconstruction and track association to events in the PANDA specific environment of about 150 tracks from 40 individual events within 2 µs.
Changed:
<
<
The detector consists of 4636 straw tubes, each with a length of 1400 mm and 10 mm inner diameter. The wall thickness of the aluminised mylar film tube is 27 µm. The tubes are pressurized to 1 bar overpressure (2 bar absolute pressure) and glued together to close-packed, self-supporting multi-layers which sustain the wire tension and tube stretching equivalent to 230 kg and 3.2 tons (sum for 4636 tubes). The straws are arranged in two semi-barrels around the beam pipe with a few cm horizontal gap to leave space for the vertical target pipe.
>
>
The detector consists of 4636 straw tubes, each with a length of 1400 mm and 10 mm inner diameter. The wall thickness of the aluminised mylar film tube is 27 µm. The tubes are pressurized to 1 bar overpressure (2 bar absolute pressure) and glued together to close-packed, self-supporting multi-layers which sustain the wire tension and tube stretching equivalent to 230 kg and 3.2 tons (sum for 4636 tubes). The straws are arranged in two semi-barrels around the beam pipe with a few cm gap to leave space for the vertical target pipe.
 

STT 3-D view
Revision 6
05 Nov 2013 - Main.PeterWintz
Line: 1 to 1
 
META TOPICPARENT name="WebHome"

General Description

Line: 35 to 35
 
Spatial resolution (sigma) 150 µm (xy), 2-3 mm (z)
Energy resolution (dE/dx) < 10 %
Added:
>
>
Back to STT.WebHome
 
META FILEATTACHMENT attr="" comment="STT x-y view" date="1383574454" name="STT_xyview.jpg" path="STT_xyview.jpg" size="54215" user="PeterWintz" version="1.1"
META FILEATTACHMENT attr="" comment="STT 3-D view" date="1383574568" name="STT_3Dview.jpg" path="STT_3Dview.jpg" size="30940" user="PeterWintz" version="1.1"
Revision 5
05 Nov 2013 - Main.PeterWintz
Line: 1 to 1
 
META TOPICPARENT name="WebHome"

General Description

-- PeterWintz - 04 Nov 2013

STT x-y view
Changed:
<
<
The central Straw Tube Tracker (STT) in the PANDA target spectrometer features a high-resolution spatial and momentum reconstruction of charged particle trajectories in a broad momentum range from about 100 MeV/c to 8 GeV/c. In addition, a particle identification of protons, kaons, and pions in the momentum region below 1 GeV/c has to be done exclusively by the STT, with a measurement of the particles' specific energy-loss. The STT design is optimised for a minimal material budget by the technique of self-supporting straw layer modules. The detector is essential for the online track reconstruction and association to interesting events to start the storage of the event data from the buffers to disk in the continuous data-acquisition environment at PANDA.
>
>
The central Straw Tube Tracker (STT) in the PANDA target spectrometer features a high-resolution spatial and momentum reconstruction of charged particle trajectories in a broad momentum range from about 100 MeV/c to 8 GeV/c. In addition, a particle identification of protons, kaons, and pions in the momentum region below 1 GeV/c has to be done exclusively by the STT, with a measurement of the particles' specific energy-loss. The STT design is optimised for a minimal material budget by the technique of self-supporting straw layer modules. The detector is essential for the online track reconstruction and track association to events in the PANDA specific environment of about 150 tracks from 40 individual events within 2 µs.
 
Changed:
<
<
The detector consists of 4636 straw tubes, each with a length of 1400 mm and 10 mm inner diameter. The wall thickness of the aluminised mylar film tube is 27 µm. The tubes are pressurized to 1 bar overpressure (2 bar absolute pressure) and glued together to close-packed, self-supporting multi-layers which sustain the wire tension and tube stretching equivalent to 230 kg and 3.2 tons (sum for 4636 tubes).
>
>
The detector consists of 4636 straw tubes, each with a length of 1400 mm and 10 mm inner diameter. The wall thickness of the aluminised mylar film tube is 27 µm. The tubes are pressurized to 1 bar overpressure (2 bar absolute pressure) and glued together to close-packed, self-supporting multi-layers which sustain the wire tension and tube stretching equivalent to 230 kg and 3.2 tons (sum for 4636 tubes). The straws are arranged in two semi-barrels around the beam pipe with a few cm horizontal gap to leave space for the vertical target pipe.
 

STT 3-D view
Revision 4
05 Nov 2013 - Main.PeterWintz
Line: 1 to 1
 
META TOPICPARENT name="WebHome"

General Description

Line: 28 to 28
 
Wire diameter 20 µm
Number of axial layers 15-19
Number of stereo layers 8
Changed:
<
<
Stereo angle +- 2.9 deg
>
>
Stereo angle +2.9, -2.9 deg
 
Gas mixture Ar/CO2(10%)
Gas pressure 2 bar (absolute)
Maximum drift time (2T-field) ~ 200 ns
Revision 3
04 Nov 2013 - Main.PeterWintz
Line: 1 to 1
 
META TOPICPARENT name="WebHome"

General Description

-- PeterWintz - 04 Nov 2013
Changed:
<
<
The central Straw Tube Tracker (STT) in the PANDA target spectrometer features a high-resolution spatial and momentum reconstruction of charged particle trajectories in a broad momentum range from about 100 MeV/c to 8 GeV/c. In addition, a particle identification of protons, kaons, and pions in the momentum region below 1 GeV/c has to be done exclusively by the STT, with a measurement of the particles' specific energy-loss. The STT design is optimised for a minimal material budget by the technique of self-supporting straw layer modules. The detector is essential for the online track reconstruction and event identi fication in the continuous, trigger-less data-acquisition at PANDA.
>
>
STT x-y view The central Straw Tube Tracker (STT) in the PANDA target spectrometer features a high-resolution spatial and momentum reconstruction of charged particle trajectories in a broad momentum range from about 100 MeV/c to 8 GeV/c. In addition, a particle identification of protons, kaons, and pions in the momentum region below 1 GeV/c has to be done exclusively by the STT, with a measurement of the particles' specific energy-loss. The STT design is optimised for a minimal material budget by the technique of self-supporting straw layer modules. The detector is essential for the online track reconstruction and association to interesting events to start the storage of the event data from the buffers to disk in the continuous data-acquisition environment at PANDA.
 

The detector consists of 4636 straw tubes, each with a length of 1400 mm and 10 mm inner diameter. The wall thickness of the aluminised mylar film tube is 27 µm. The tubes are pressurized to 1 bar overpressure (2 bar absolute pressure) and glued together to close-packed, self-supporting multi-layers which sustain the wire tension and tube stretching equivalent to 230kg and 3.2 tons (sum for 4636 tubes).
Changed:
<
<
Specification Number
>
>
STT 3-D view

STT Dimensions
Inner radius 15 cm
Outer radius 42 cm
Total length 171 cm
Material budget (radial) 1.23 % (X/X0)

Specifications
 
Straw number 4636
Straw length 1400 mm
Changed:
<
<
Straw diameter 10 mm
Straw gap 20 µm
>
>
Straw diameter (inner) 10 mm
Straw pitch 10.12 mm
 
Straw film tube Mylar (aluminised)
Straw wall thickness 27 µm
Sense wire W/Rh
Wire diameter 20 µm
Changed:
<
<
Wire tension 50 g
Straw weight 2.5 g
Number of axial straw layers 12- 19
Number of stereo straw layers 8
Stereo angle 2.9 deg
>
>
Number of axial layers 15-19
Number of stereo layers 8
Stereo angle +- 2.9 deg
 
Gas mixture Ar/CO2(10%)
Gas pressure 2 bar (absolute)
Changed:
<
<
Spatial resolution (r/phi) 150 µm
| |
STT inner radius 16 cm
STT outer radius 42 cm
STT total length 171 cm
STT material budget (radial) 1.23 % (X/X0)
>
>
Maximum drift time (2T-field) ~ 200 ns
Spatial resolution (sigma) 150 µm (xy), 2-3 mm (z)
Energy resolution (dE/dx) < 10 %
 
Added:
>
>
META FILEATTACHMENT attr="" comment="STT x-y view" date="1383574454" name="STT_xyview.jpg" path="STT_xyview.jpg" size="54215" user="PeterWintz" version="1.1"
META FILEATTACHMENT attr="" comment="STT 3-D view" date="1383574568" name="STT_3Dview.jpg" path="STT_3Dview.jpg" size="30940" user="PeterWintz" version="1.1"
Revision 2
04 Nov 2013 - Main.PeterWintz
Line: 1 to 1
 
META TOPICPARENT name="WebHome"

General Description

Line: 7 to 7
  The central Straw Tube Tracker (STT) in the PANDA target spectrometer features a high-resolution spatial and momentum reconstruction of charged particle trajectories in a broad momentum range from about 100 MeV/c to 8 GeV/c. In addition, a particle identification of protons, kaons, and pions in the momentum region below 1 GeV/c has to be done exclusively by the STT, with a measurement of the particles' specific energy-loss. The STT design is optimised for a minimal material budget by the technique of self-supporting straw layer modules. The detector is essential for the online track reconstruction and event identi fication in the continuous, trigger-less data-acquisition at PANDA.
Changed:
<
<
The detector consists of 4636 straw tubes, each with a length of 1400 mm and 10mm inner diameter. The wall thickness of the aluminised mylar film tube is 27 µm. The tubes are pressurized to 1 bar overpressure (2 bar absolute pressure) and glued together to close-packed planar multi-layers.
>
>
The detector consists of 4636 straw tubes, each with a length of 1400 mm and 10 mm inner diameter. The wall thickness of the aluminised mylar film tube is 27 µm. The tubes are pressurized to 1 bar overpressure (2 bar absolute pressure) and glued together to close-packed, self-supporting multi-layers which sustain the wire tension and tube stretching equivalent to 230kg and 3.2 tons (sum for 4636 tubes).

Specification Number
Straw number 4636
Straw length 1400 mm
Straw diameter 10 mm
Straw gap 20 µm
Straw film tube Mylar (aluminised)
Straw wall thickness 27 µm
Sense wire W/Rh
Wire diameter 20 µm
Wire tension 50 g
Straw weight 2.5 g
Number of axial straw layers 12- 19
Number of stereo straw layers 8
Stereo angle 2.9 deg
Gas mixture Ar/CO2(10%)
Gas pressure 2 bar (absolute)
Spatial resolution (r/phi) 150 µm
| |
STT inner radius 16 cm
STT outer radius 42 cm
STT total length 171 cm
STT material budget (radial) 1.23 % (X/X0)
 
 
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