NICA Project

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NICA Project Report of The Group I
S.L.Bogomolov, A.V.Butenko, A.V.Efremov,
E.D.Donets, I.N.Meshkov, V.A.Mikhailov, A.O.Sidori
n, A.V.Smirnov,
Round Table Discussion 6-7 October JINR, Dubna
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Contents 1. Introduction the basic
conditions 2. Scheme of the NICA 3. Operation
Scenario 4. Layout of the accelerator facility 5.
The collider ring magnetic system parameters 6.
Luminosity 7. Main elements of the Facility 8.
Nuclotron tune shift at injection, electron
cooling, upgrade program 9. Estimated Cost,
Manpower, Resources 10. Further development 11.
Resources schedule Conclusion
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1. Introduction The Boundary Conditions
1. Minimum of R D
2. Application of existing experience
3. Co-operation with experienced research centers
4. Cost as low as possible 5. Realization time
4 5 years
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2. Scheme of The NICA
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3. Operation Scenario

1. The beam of 238U30 formation in the Injector and
   injection into Nuclotron.
2. A few injection cycles and RF stacking of ions in
   the Nuclotron up to the level of 1011 ions

3. Acceleration from 5 to 500 MeV/u with
electron cooling on plateau at 300 MeV/u
cooling time 10 s.
4. Extraction from the Nuclotron and injection
into the 1st collider ring, circulation during
magnetic field decrease in the Nuclotron.
5. Extraction from the collider ring, stripping
on the Stripper Target into 238U92stage,
injection into the Nuclotron.
6. Acceleration up to 2.5 GeV/u. 7. Extraction,
injection into the 2d collider ring.
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3. Operation Scenario (Contnd)
8. Repetition of the steps 1?6. 9. Extraction,
injection into the 1st collider ring. 10.
Bunching of both beams and junction. Beginning of
detection interaction events.
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3. Operation Scenario (Contnd)
Working Cycle of The Facility
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3. Operation Scenario (Contnd)
Ion Beam Lifetime in Nuclotron
At 5 MeV/u in Helium vacuum ? (5 30)?10-17
cm2
? 0.3 2 sec at P 10-10 Torr
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5. The collider ring magnetic system parameters
Magnetic rigidity minimum/maximum Tm 12/48
Circumference m 183
Number of superperiods 2
Number of periods in regular sections 7
Long straight sections, number x length m 2x30m
Middle straight sections, number x length m 4x4m
Number of dipoles / eff. length of dipole 24 / 3.0m
Number of quadrupoles in regular sections / length of quads 28 / 0.5m
Maximum dipole field T 4 ? 5
Maximum quadrupole gradient T/m 49/-45
Beam crossing angle in IP mrad ? 15?20
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6. Luminosity
Main Collider Parameters N1 N2 1?1011 nb 20
linteraction ? lIP ? lbunch 50 cm ?x ??y 0.7
??mm?mrad
Peak Luminosity - 5?1027 cm-2s-1 Average
Luminosity - 2?1027 cm-2s-1
Beam-beam effect
? ? 0.004
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6. Luminosity (Contnd)
Luminosity vs Crossing Angle ?
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7. Main Elements of the Facility
Injector
The KRION key issue of the project
Parameters 238U30 8?109 ions/pulse, emittance 1
??mm?mrad Pulse duration 8 ?s at 50 Hz rep.
freq. Solenoid of 6 T magn. field
SC solenoid of 6 T magn. field is required!
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7. Main elements of the facility (Contnd)
Injector
The injector parameters
PCC Alvarez
Initial energy, keV/u 3.78 400
Final energy, keV/u 400 5000
RF frequency 14.58 148.5
Total length, m 5.5 25
Cavity diameter, m 1.2 1.6
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7. Main elements of the facility (Contnd)
Injector - Polycylindrical Cavity Accelerator
(PCC)
Schematics of the PCC accelerator 1, 2, 3 - ?/4
cavities, 4 buncher gap, 5 current monitors.
Parameters of the PCC
Gap number 1 2 3
Length, cm 3 10 10
Voltage amplitude, MV 0.6 2 2
The gap efficiency 0.8 1 1
Capacity, pF 4.5 2.7 11
RF power, kW 10 63 257
Experimental results Protons, 1.5 MeV Ibeam
10 mA F 148 MHz
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8. Nuclotron Life Time Tune Shift at Injection
Ion Beam Lifetime in Nuclotron
At 5 MeV/u in Helium vacuum ? (5 30)?10-17
cm2
?life 0.3 2 sec at P 10-10 Torr
Fast acceleration
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8. Nuclotron (Contnd)
Electron cooling
Electron energy 180 keV Electron
beam current 0.5 A Electron beam diameter
1.4 cm Solenoid magnetic field 2.0 kG Cooling
section length 2.0 m Electron temperature,
T? 200 meV
T?? 1.0 Cooling time 10 s
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8. Nuclotron electron cooling (Contnd)
Recombination with cooling electrons
Effect of ion structure LEAR experience Phys.
Lett. B361 (1995)184 Ion ?r 10-8
cm-3?s-1 Pb52 11 Pb53 60 Pb54
9 U28 10 Au25 10
For the cooler parameters listed above ?recomb
25 s
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8. Nuclotron electron cooling (Contnd)
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8. Nuclotron (Contnd)
Upgrade program
To routine operation !
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9. Estimated cost, manpower, resources (Contnd)
Co-operation Manufacturing
Co-operation with Budker INP
1) magnets mass production 48 magnets !
BINP Experience of SC dipoles for BESSY II ? up
to 10T
SC dipoles for NICA 4T (2.5 GeV/u) ? 7T (5
GeV/u)
Common design and manufacturing at BINP and
JINR It will speed up project realization
Estimate of theSC magnets production based on the
manufacturing rate of the Workshop at Budker INP
shows
Schedule 1 magnet/month 4 years !
Thus, we will need to organize the parallel
process of manufacturing!
and
Test at Kurchatov Institute JINR (lack of LHe!)
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9. Estimated cost, manpower, resources (Contnd)
Co-operation Manufacturing
Co-operation with Budker INP
2) injection/extraction systems
3) Alvarez (CERN linac)
4) First harmonics RF for Nuclotron
5) E-cooling system for Nuclotron (high
precision solenoid)
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10. Further development
a) Booster
b) Energy increase
c) High energy electron cooling ?
? collaboration with FZ
Juelich GSI
c) Polarized beams
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11. Resources schedule
Cost
Element, work Cost, M
Ion source 0.75
Nuclotron upgrade 0.75
Electron cooling system 1.3
Linear accelerator 5.5
Collider rings 20.0
Transfer lines 1.7
Civil constructions and assembly of the equipment 1.0
Total 31.0
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11. Resources schedule (Contnd)
Manpower
Number of staff members necessary for
accelerator facility design construction
Physicists Engineers and designers Technicians
15 45 50
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11. Resources schedule (Contnd)
Schedule
2006 2006 2006 2006 2007 2007 2008 2008 2009 2009 2010 2010 2011 2011
Conceptual design report
Nuclotron upgrade
Ion source development
Technical design
Fabrication
Assembling
Commissioning
Start of experiments
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11. Resources schedule (Contnd)
One can manage the project realization in stage
by stage style!
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11. Funding schedule (Contnd)
Very first tasks

• 2006 2007 2008
• KRION development ? ?
  ?
• Nuclotron upgrade ? ?
  ?

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Conclusion
NICA project has a goal to provide JINR with
modern and unique experimental facility.
It will be a significant step in development of
the home experimental base of JINR
and will bring the Institute back into
position of the leading research centers of the
World in the field of high energy physics!