Requirements • • • • • Fit into accelerator geometry. Angular acceptance 4 . Frequency of events detection 104 Hz. Events mean multiplicity 600. Momentum resolution of charged particles •
Download ReportTranscript Requirements • • • • • Fit into accelerator geometry. Angular acceptance 4 . Frequency of events detection 104 Hz. Events mean multiplicity 600. Momentum resolution of charged particles •
Slide 1
Slide 2
Requirements
•
•
•
•
•
Fit into accelerator geometry.
Angular acceptance 4 .
Frequency of events detection 104 Hz.
Events mean multiplicity 600.
Momentum resolution of charged particles
< 1%.
• Detection of γ.
• Detection of short-lived (charm) particles is
not required.
Slide 3
Concept of detector
1. Beams intercept point.
2. Silicon vertex detector.
3. Toroidal magnet with drift
tubes trekker.
4. Toroidal magnet coil (8 coils).
5. Multiplicity detector,
electromagnetic and hadron
calorimeters, TOF system
(RPC).
6. Accelerator quad.
7. Multiplicity detector and TOF
system (RPC).
1м
3,5 м
А
11
4,5 м
6
2
10
1
8. Electromagnetic and
hadron calorimeters.
9. Muons detector.
10. Accelerator chamber.
11. Collider beam.
3
4
8
5
9
7
А
The setup is symmetric
respect the plane A-A. The
right part of the setup is
not shown. Setup overall
dimensions are: along the
beam 7 m, diameter – 4.5
m.
Slide 4
Setup main parameters
Module
Element
dimension
or pitch.
0.2 – 0.5 mm
Channel
number,
thousand.
50
6 mm
25
Toroidal magnet.
2 m 2.5 m
-
Barrel EM and hadron
calorimeters.
Barrel Time of flight system
(TOF, RPC).
15 15 cm2
15
1515 cm2
12
Wall TOF (RPC).
1515 cm2
32
Wall EM and hadron
calorimeters.
Muon drift tubes detector.
1515 cm2
40
5 cm
0.5
Silicon vertex detector.
Drift tubes tracker.
Slide 5
Distinctive feature of particles detection and identification.
1. Silicon vertex detector pitch is chosen to be 0.2 – 0.5 mm
which is 10 times higher then technologically possible now. This choice
provides 10 times chipper device. Coordinate accuracy 0.1 mm of
single measurement is quite sufficient for hyperons detection and
reconstruction of events with multiplicity 600.
2. Rotation of particle with momentum 2 GeV/c in magnetic
spectrometer is 60 mrad. It is to be compared with angle of multiple
scattering in drift tubes tracker – 0.4 mrad. Momentum resolution is
estimated to be 0.6%.
3. High demand is shown to accuracy of TOF measurement. Difference
of TOF of electron and pion with momentum 0.5 GeV/c (decay of
and mesons) on basis of 1.5 m is 400 ps. TOF system must have
resolution 50 – 80 ps. (RPC).
Slide 6
Distinctive feature of particles detection and identification.
4. Electromagnetic calorimeter with shower maximum detection
may drastically improve capability of electron – hadron
separation.
Slide 7
Slide 8
The paramount important parameters of present research are
energy density and temperature of hadronic matter. These values
are determined by primary energy of nuclei and its impact
parameter. An another independent way to control thermodynamic
state of system is to select events with predetermined multiplicity
of secondary products. Technical way to achieve this goal is
implement effective high multiplicity trigger sensitive both to
charged and neutral secondary.
The domain of very high multiplicity z > 4, z=n/ was not
yet studied (VHM) nether in NN nor in AA collisions. The higher is
multiplicity the higher is energy dissipation, higher is achievable
density and deeper is thermalization process. Near the threshold of
reaction all particles get small relative momentum. The kinetic
energy approaches to potential one what is necessary condition for
onset of phase transitions. In thermalized cold and dense hadronic
gas as consequence of multiboson interference a number of
collective effects may show up.
Slide 9
Comparison
of longitudinal p z and transverse p x momenta behavior in
c.m.s.
pz
0.2
Manifestation of
“transverse flow” ?
px
pp 70 GeV
0
Complete
thermalization?
20
30
40
50
60
70
n
Manifestation of longitudinal flow ?
Slide 10
Multiplicity distribution in Pb+Pb interactions at Elab =160 A Gev
as measured by WA98 setup at CERN
104
101
Slide 11
One can extrapolate data to 6 order of
magnitude down and presumably reach
multiplicity 840. One can speculate to
reach a new mechanism of hadronization
and a new fashion of phase transitions.
Since we are plane to collect 5109
central events per year we may get 5103
very exotic and possibly unusual events.
Slide 12
Cost and manpower estimate.
Slide 13
Lay-out of the SVD setup at U - 70.
• Scheme of the SVD
installation at U - 70.
• С1, С2 -beam
scintillation and Sihodoscope;
• С3, С4 - target station
and vertex Si-detector;
• 1, 2, 3-the drift tubes
track system;
• 4 - magnetic
spectrometer
proportional chambers;
• 5- threshold Cherenkov
counter;
• 6 - scintillation
hodoscope;
• 7 - electromagnetic
calorimeter.}
Slide 14
SVD hall
U-70 proton beam
Slide 15
Setup schematic view.
Cherenkov
counter, 36 ch.
Micro strip VD,
10 000 channels.
Drift tubes tracker,
2400 channels
Magnetic spectrometer,
10 000 ch.
EMC,
1500 cells.
Slide 16
Silicon micro strip vertex detector. An exsample
of foil targets imaging.
4 mm
Slide 17
Silicon micro strip vertex detector.
An exsample of pC interaction event.
28
charged
tracks
Slide 18
Silicon vertex detector
40 cm
Slide 19
Module of drift tubes tracker.
1m
Slide 20
Assembly od drift tubes tracker.
Slide 21
Charm particle D0 detection
pC
D0 X, 70 GeV.
Slide 22
Search for pentaquark +, 2005.
K_0 found in magnetic spectrometer.
Total statistics:
Signal=392,
Backg=1990.
Significance=8σ.
1.500
1.600
Slide 23
Cost and manpower of two components
of SVD setup at U-70.
• Silicon vertex detector. 10 000 channels.
Designed and implemented 1999 – 2002,
Selenograd and MSU. Cost: 250 th. $.
Manpower: 4 persons. Cost per channel: 25 $.
• Drift tubes tracker. 2400 channels. Designed
and implemented 2003 – 2005, PPL JINR.
Cost: 55 th. $. Manpower: 4 persons with 30%
occupancy. Cost per channel: 22 $.
Slide 24
Cost estimate.
Element, work
Silicon vertex detector.
Drift tubes tracker.
Materials and Workshop,
equipment, Men-power,
M$
M$
1.3 (1.2)
2.1 (0.45)
1.2
0.7
Toroidal magnet.
1.2
0.5
Barrel EM and hadron calorimeters.
1.2
1.5
Barrel Time of flight system (TOF, RPC).
2.5
1.5
Wall TOF (RPC).
4.5
2.1
Wall EM and hadron calorimeters.
9.5
2.0
Muon drift tubes detector.
0.08
0.3
Data acquisition system.
0.06
0.1
Software development.
0.01
0.
Total
22.45
9.9
* As estimated from SVD (U-70)
Slide 25
Some expert’s remarks.
• Peter Senger.
1. Do not build TRD
-- Agree.
2. Do not build Silicon vertex detector. – Interesting idea
to think about.
3. Do not build calorimeters -- Agree do not build hadron
calorimeters. But EM calorimeters are very important.
4. Detailed feasibility studies have not been made and will
take years.
-- Disagree.
5. The time for realization is strongly underestimated.
-- Disagree.
• N.Xu.
1. A pair of ZDC are needed. -- Not sure. Need to think.
2. Take a staged approach of detector construction.
-- Agree. Good idea.
Slide 26
Slide 27
We are
optimistic
and looking
forward to
see NICA
operation.
Slide 2
Requirements
•
•
•
•
•
Fit into accelerator geometry.
Angular acceptance 4 .
Frequency of events detection 104 Hz.
Events mean multiplicity 600.
Momentum resolution of charged particles
< 1%.
• Detection of γ.
• Detection of short-lived (charm) particles is
not required.
Slide 3
Concept of detector
1. Beams intercept point.
2. Silicon vertex detector.
3. Toroidal magnet with drift
tubes trekker.
4. Toroidal magnet coil (8 coils).
5. Multiplicity detector,
electromagnetic and hadron
calorimeters, TOF system
(RPC).
6. Accelerator quad.
7. Multiplicity detector and TOF
system (RPC).
1м
3,5 м
А
11
4,5 м
6
2
10
1
8. Electromagnetic and
hadron calorimeters.
9. Muons detector.
10. Accelerator chamber.
11. Collider beam.
3
4
8
5
9
7
А
The setup is symmetric
respect the plane A-A. The
right part of the setup is
not shown. Setup overall
dimensions are: along the
beam 7 m, diameter – 4.5
m.
Slide 4
Setup main parameters
Module
Element
dimension
or pitch.
0.2 – 0.5 mm
Channel
number,
thousand.
50
6 mm
25
Toroidal magnet.
2 m 2.5 m
-
Barrel EM and hadron
calorimeters.
Barrel Time of flight system
(TOF, RPC).
15 15 cm2
15
1515 cm2
12
Wall TOF (RPC).
1515 cm2
32
Wall EM and hadron
calorimeters.
Muon drift tubes detector.
1515 cm2
40
5 cm
0.5
Silicon vertex detector.
Drift tubes tracker.
Slide 5
Distinctive feature of particles detection and identification.
1. Silicon vertex detector pitch is chosen to be 0.2 – 0.5 mm
which is 10 times higher then technologically possible now. This choice
provides 10 times chipper device. Coordinate accuracy 0.1 mm of
single measurement is quite sufficient for hyperons detection and
reconstruction of events with multiplicity 600.
2. Rotation of particle with momentum 2 GeV/c in magnetic
spectrometer is 60 mrad. It is to be compared with angle of multiple
scattering in drift tubes tracker – 0.4 mrad. Momentum resolution is
estimated to be 0.6%.
3. High demand is shown to accuracy of TOF measurement. Difference
of TOF of electron and pion with momentum 0.5 GeV/c (decay of
and mesons) on basis of 1.5 m is 400 ps. TOF system must have
resolution 50 – 80 ps. (RPC).
Slide 6
Distinctive feature of particles detection and identification.
4. Electromagnetic calorimeter with shower maximum detection
may drastically improve capability of electron – hadron
separation.
Slide 7
Slide 8
The paramount important parameters of present research are
energy density and temperature of hadronic matter. These values
are determined by primary energy of nuclei and its impact
parameter. An another independent way to control thermodynamic
state of system is to select events with predetermined multiplicity
of secondary products. Technical way to achieve this goal is
implement effective high multiplicity trigger sensitive both to
charged and neutral secondary.
The domain of very high multiplicity z > 4, z=n/
yet studied (VHM) nether in NN nor in AA collisions. The higher is
multiplicity the higher is energy dissipation, higher is achievable
density and deeper is thermalization process. Near the threshold of
reaction all particles get small relative momentum. The kinetic
energy approaches to potential one what is necessary condition for
onset of phase transitions. In thermalized cold and dense hadronic
gas as consequence of multiboson interference a number of
collective effects may show up.
Slide 9
Comparison
of longitudinal p z and transverse p x momenta behavior in
c.m.s.
pz
0.2
Manifestation of
“transverse flow” ?
px
pp 70 GeV
0
Complete
thermalization?
20
30
40
50
60
70
n
Manifestation of longitudinal flow ?
Slide 10
Multiplicity distribution in Pb+Pb interactions at Elab =160 A Gev
as measured by WA98 setup at CERN
104
101
Slide 11
One can extrapolate data to 6 order of
magnitude down and presumably reach
multiplicity 840. One can speculate to
reach a new mechanism of hadronization
and a new fashion of phase transitions.
Since we are plane to collect 5109
central events per year we may get 5103
very exotic and possibly unusual events.
Slide 12
Cost and manpower estimate.
Slide 13
Lay-out of the SVD setup at U - 70.
• Scheme of the SVD
installation at U - 70.
• С1, С2 -beam
scintillation and Sihodoscope;
• С3, С4 - target station
and vertex Si-detector;
• 1, 2, 3-the drift tubes
track system;
• 4 - magnetic
spectrometer
proportional chambers;
• 5- threshold Cherenkov
counter;
• 6 - scintillation
hodoscope;
• 7 - electromagnetic
calorimeter.}
Slide 14
SVD hall
U-70 proton beam
Slide 15
Setup schematic view.
Cherenkov
counter, 36 ch.
Micro strip VD,
10 000 channels.
Drift tubes tracker,
2400 channels
Magnetic spectrometer,
10 000 ch.
EMC,
1500 cells.
Slide 16
Silicon micro strip vertex detector. An exsample
of foil targets imaging.
4 mm
Slide 17
Silicon micro strip vertex detector.
An exsample of pC interaction event.
28
charged
tracks
Slide 18
Silicon vertex detector
40 cm
Slide 19
Module of drift tubes tracker.
1m
Slide 20
Assembly od drift tubes tracker.
Slide 21
Charm particle D0 detection
pC
D0 X, 70 GeV.
Slide 22
Search for pentaquark +, 2005.
K_0 found in magnetic spectrometer.
Total statistics:
Signal=392,
Backg=1990.
Significance=8σ.
1.500
1.600
Slide 23
Cost and manpower of two components
of SVD setup at U-70.
• Silicon vertex detector. 10 000 channels.
Designed and implemented 1999 – 2002,
Selenograd and MSU. Cost: 250 th. $.
Manpower: 4 persons. Cost per channel: 25 $.
• Drift tubes tracker. 2400 channels. Designed
and implemented 2003 – 2005, PPL JINR.
Cost: 55 th. $. Manpower: 4 persons with 30%
occupancy. Cost per channel: 22 $.
Slide 24
Cost estimate.
Element, work
Silicon vertex detector.
Drift tubes tracker.
Materials and Workshop,
equipment, Men-power,
M$
M$
1.3 (1.2)
2.1 (0.45)
1.2
0.7
Toroidal magnet.
1.2
0.5
Barrel EM and hadron calorimeters.
1.2
1.5
Barrel Time of flight system (TOF, RPC).
2.5
1.5
Wall TOF (RPC).
4.5
2.1
Wall EM and hadron calorimeters.
9.5
2.0
Muon drift tubes detector.
0.08
0.3
Data acquisition system.
0.06
0.1
Software development.
0.01
0.
Total
22.45
9.9
* As estimated from SVD (U-70)
Slide 25
Some expert’s remarks.
• Peter Senger.
1. Do not build TRD
-- Agree.
2. Do not build Silicon vertex detector. – Interesting idea
to think about.
3. Do not build calorimeters -- Agree do not build hadron
calorimeters. But EM calorimeters are very important.
4. Detailed feasibility studies have not been made and will
take years.
-- Disagree.
5. The time for realization is strongly underestimated.
-- Disagree.
• N.Xu.
1. A pair of ZDC are needed. -- Not sure. Need to think.
2. Take a staged approach of detector construction.
-- Agree. Good idea.
Slide 26
Slide 27
We are
optimistic
and looking
forward to
see NICA
operation.