Workshop at Institute for Theoretical Physics, University of Wroclaw December 5. & 6. 2009
description
Transcript of Workshop at Institute for Theoretical Physics, University of Wroclaw December 5. & 6. 2009
1
Workshop at Institute for Theoretical Physics, University of Wroclaw
December 5. & 6. 2009
NICANICA Accelerator ComplexAccelerator ComplexNNuclotron-baseduclotron-based I Ionon CColliderollider ffAAcilitycility
O. KozlovO. Kozlovforfor NICA teamNICA team
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ContentsIntroduction:
1. NICA scheme & layout
2. Heavy ions in NICA
2.1. Operation regime and parameters
2.2. Collider
3. Polarized particle beams in NICA
4. NICA project status and nearest plans
Conclusion
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
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The NICA Project goals
formulated in NICA CDR are the following:
1a) Heavy ion colliding beams 197Au79+ x 197Au79+ at
sNN = 4 11 GeV (1 4.5 GeV/u ion kinetic energy )
at
Laverage= 11027 cm-2s-1 (at sNN = 9 GeV)
1b) Light-Heavy ion colliding beams of the same energy range and luminosity
2) Polarized beams of protons and deuterons:
pp sNN = 12 25 GeV (5 12.6 GeV kinetic energy )
dd sNN = 4 13.8 GeV (2 5.9 GeV/u ion kinetic energy )
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
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1. NICA scheme &
layout
Synchrophasotron yoke
Nuclotron
Existing beam lines(Fixed target exp-s)
ColliderC = 251 m
“Old” linac
KRION-6T & HILac
Beam transfer line
MPD
Spin Physics Detector
(SPD)
2.3 m
4.0 m
Booster
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1. NICA scheme & layout
(Contnd)
“Old” Linac LU-20
KRION + “New” HILACBooster
Nuclotron
Collider MPD
SPD Beam dump
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2. Heavy ions in NICA
Nuclotron (45 Tm)injection of one
bunch of 1.1×109 ions,
acceleration up to 14.5 GeV/u max.
Collider (45 Tm)Storage of
17 (20) bunches 1109 ions per ring
at 14.5 GeV/u,electron and/or stochastic cooling
Injector: 2×109 ions/pulse of 197Au32+ at energy of 6.2 MeV/u
IP-1
IP-2
Two superconducting
collider rings
2.1. Operation regime and
parameters
Booster (25 Tm)1(2-3) single-turn
injection, storage of 2 (4-6)×109,acceleration up to 100
MeV/u,electron cooling,
acceleration up to 600 MeV/uStripping (80%) 197Au32+
197Au79+
2х17 (20) injection
cycles
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
Bunch compression (RF phase jump)
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Stage E MeV/u
unnorm mmmr
ad
p/p lbunch m
Intensityloss,%
Space charge Q
Injection (after bunching on 4th harmonics
6.2 10 1.3E-3 6 10 0.022
After cooling (h=1)
100 2.45 3.8E-4 7.17 <10 0.016
At extraction 600 0.89 3.2E-4 3.1 0.0085
Injection (after stripping)
594 0.89 3.4E-4 3.1 <20 0.051
After acceleration 3500 0.25 1.5E-4 2 <1 0.0075
At extraction 3500 0.25 110-3 0.5 Loss = 40%
Nextr= 1E9
0.03
2. Heavy ions in NICA
(Contnd)
Bunch parameters dynamics in the injection
chain
2.1. Operation regime and
parameters
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2. Heavy ions in NICA
(Contnd)
Bunch compression in Nuclotron
Phase space portraits of the bunch
Bunch rotation by “RF amplitude jump” 15 120 kV
, 10 deg./div
E – E0 , 2 GeV/div
1 2
2.1. Operation regime and
parameters
A.Eliseev
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2. Heavy ions in NICA
(Contnd)Bunch compression in Nuclotron
time, 0.1 sec/div.
E_r.m.c.
200 MeV/div.
_r.m.s.
5 deg./div.
(1 deg. 0.7 m)
_r.m.s.
0.5 eVsec/div
E – E0 , 2 GeV/div
Phase space portraits of the bunch (RF “phase jump” = 1800)
, 50 deg./div
2.1. Operation regime and
parameters
A.Eliseev
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
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0
0,5
1
1,5
2
0 2 4 6
2. Heavy ions in NICA
(Contnd)Time Table of The Storage
Process
2.1. Operation regime and
parameters
B(t
), a
rb. u
nit
s0
0,5
1
1,5
2
0 2 4 6
Booster magnetic field
B(t
), a
rb. u
nit
s
Nuclotron magnetic field
t, [s]
t, [s]
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
electroncooling
1 (2-3) injection cycles,electron cooling (?)
Extraction, stripping to 197Au79+
bunch compression,extraction
injection
34 injection cycles to Collider ringsof 1109 ions 197Au79+ per cycle
1.71010 ions/ring
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2. Heavy ions in NICA
(Contnd)
MPD
RF
I.Meshkov, O.Kozlov, V.Mikhailov,A.Sidorin, A.Smirnov, N.Topilin
SPDx,y kicker
10 m
Injection channels
Spin rotator
3.2. Collider
Upper ring
Beam dump
Long. kicker
S_Cool PUx, y, long
E_cooler
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Ring circumference, [m] 251.52
B max [ Tm ] 45.0
Ion kinetic energy (Au79+), [GeV/u] 1.0 4.56
Dipole field (max), [ T ] 4.0
Quad gradient (max), [ T/m ] 29.0
Number of dipoles / length 24 / 3.0 m
Number of vertical dipoles per ring 2 x 4
Number of quads / length 32 / 0.4 m
Long straight sections: number / length
2 x 48.0 m
Short straight sections: number / length,
4 x 8.8 m
2. Heavy ions in NICA
(Contnd) 2.2. Collider
General Parameters
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
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βx_max / βy_max in FODO period, m
16.8 / 15.2
Dx_max / Dy_max in FODO period, m
5.9 / 0.2
βx_min / βy_min in IP, m 0.5 / 0.5
Dx / Dy in IP, m 0.0 / 0.0
Free space at IP (for detector) 9 m
Beam crossing angle at IP 0
Betatron tunes Qx / Qy 5.26 / 5.17
Chromaticity Q’x / Q’y -12.22 / -11.85
Transition energy, _tr / E_tr 4.95 / 3.012 GeV/u
RF system harmonics amplitude, [kV]
102 100
Vacuum, [ pTorr ] 100 10
2. Heavy ions in NICA
(Contnd)2.2. Collider General parameters (Contnd)
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Energy, GeV/u 1.0 3.5
Ion number per bunch 1E9 1E9
Number of bunches per ring 17 17
Rms unnormalized beam emittance, ∙mm mrad
3.8 0.25
Rms momentum spread 1E-3 1E-3
Rms bunch length, m 0.3 0.3
Luminosity per one IP, cm-2∙s-1 0.75E26 1.1E27
Incoherent tune shift Qbet 0.056 0.047
Beam-beam parameter 0.0026 0.0051
IBS growth time, s 650 50
2. Heavy ions in NICA
(Contnd)2.2. Collider General parameters (Contnd)
Collider beam parameters and luminosity
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2) Injection and storage with barrier bucket
technique and cooling of a coasting (!) beam, 20
bunches, bunch number is limited by interbunch space in IP straight
section, bunch compression in Nuclotron is NOT required (!) Electron and/or stochastic cooling for storage and
luminosity preservation, bunch formation after storage are
required.
2. Heavy ions in NICA
(Contnd)
Two injection schemes are considered:
1) bunch by bunch injection, 17 bunches: bunch number is limited by kicker pulse duration, bunch compression in Nuclotron is required (!) Electron and/or stochastic cooling is used for luminosity
preservation.
2.2. Collider (Contnd)
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
Under development by Prof. T.Katayama (retired from Tokyo Univ.)
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3. Heavy ions in NICA
(Contnd)3.2. Collider
(Contnd)
Ion trajectory in the phase space (p, )
2
V(t)Cavity
voltage
(p)io
n
_stack
0
Barrier Bucket Method (Contnd)
Stack
NICA: Trevolution = 0.85 0.96 s, VBB 16 kV
The method was tested experimentally at ESR (GSI)
with electron cooling (2008).
p (p)separatrix
Unstable phase area
(injection area)
Cooling is ON
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1_norm E( )
2_norm E( )
E
_norm(E)
[∙mm∙mrad]
10
1.0
0.10.5 1.5 2.5 3.5 4.5
E, GeV/u
1.6
0.8
N1 E( )
N2 E( )
4.50.5 E
1.6
1.4
1.2
1.0
0.8 0.5 1.5 2.5 3.5 4.5
E, GeV/u
N_ion/bunch vs Energy
[1E9]
!
2. Heavy ions in NICA
(Contnd)2.2. Collider
(Contnd)Collider luminosity vs Ion EnergyTwo outmost cases at QLasslett = Const :
1) L(E) = Const ;
2) Nion(E) = Const .
53norm32ion
1,
1)E(N
322norm )E(L,1
2
0.01
L1 E( )
L2 E( )
4.50.5 E
10
1.0
0.1
0.01 0.5 1.5 2.5 3.5
4.5 E, GeV/u
L(E)
[1E27 cm-2∙s-1]
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
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!
B [kG]
8
6
4
2
Te = 10 eV
2. Heavy ions in NICA
(Contnd) 2.2. Collider (Contnd)
BETACOOL
simulation
Parameters
ion beam: 197Au79+ at 3.5 GeV/u, initial =0.5 ∙mm∙mrad, (p/p) = 1∙10-3
electron beam: Ie = 0.5 A, re = 2 mm, Te|| = 5 meV; = 0.024 (6 m/250 m)
IBS Heating and cooling – luminosity evolution at electron cooling
0
1E+27
2E+27
3E+27
4E+27
5E+27
6E+27
0 5 10 15 20 25reference time, sec
6
Luminosity
[1E27 cm-2∙s-1] 4
2
0
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009Conclusion: Electron magnetization is much more preferable
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2. Heavy ions in NICA
(Contnd)What is “old” and what is
new?2.2. Collider: the problems to be solved
Collider SC dipoles with max B up to
4 T,
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
“Flexible” lattice (transition energy change with
energy), RF parameters (related problem), Single bunch stability, Vacuum chamber impedance and multibunch
stability, Electron clouds (vacuum chamber coating?), Stochastic cooling of bunched ion beam, Electron cooling at electron energy up to 2.5 MeV.
see below
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3. Polarized particle beams in
NICA Longitudinal polarization
formation MPDYu.Filatov,I.Meshkov
BB
Upper ring
SPD
Spin rotator:
“Full Siberian snake”
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
“Siberian snake”: Protons, 1 E 12 GeV (BL)solenoid 50 T∙m
Deuterons, 1 E 5 GeV/u (BL)solenoid 140 T∙m
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3. Polarized particle beams in NICA
(Contnd)Longitudinal polarization formation
(Contnd) MPD
SPD
B
Lower ring
“Full Siberian snake”
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From NuclotronS
a1B
)BL(
ion
dipole
3. Polarized particle beams in NICA
(Contnd)
Spin rotator
B
Longitudinally polarized particles injection
~ 900
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Protons, 1 E 12 GeV (BL)dipole 3 T∙m
Deuterons, 1 E 5 GeV/u (BL)dipole 5.8 T∙m
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3. Polarized particle beams in NICA
(Contnd)Transverse polarization
formation MPD
SPD
B
Lower ring
Dipole “450”
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
B (450)
Dipole “450”
B (450)
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Energy, GeV 5 12
Proton number per bunch 6E10 1.5E10
Rms relative momentum spread 10E-3 10E-3
Rms bunch length, m 1.7 0.8
Rms (unnormalized) emittance, mmmrad
0.24 0.027
Beta-function in the IP, m 0.5 0.5
Lasslet tune shift 0.0074 0.0033
Beam-beam parameter 0.005 0.005
Number of bunches 10 10
Luminosity, cm-2∙s-1 1.1E30
1.1E30
3. Polarized particle beams in NICA
(Contnd)
Parameters of polarized proton beams in collider
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
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Type of resonance
Resonance condition
Number of resonances at acceleration
p 0 – 12 GeV
d 0 – 6 GeV/u
1.Intrinsic res. Qs = kp Qz 6 0
2.Integer res. Qs = k 25 1 (5.6 GeV/u)
3.Nonsuperperiodic
Qs = m Qz , m kp
44 2
4.Coupling res. Qs = m Qx 49 2
3. Polarized particle beams in NICA
(Contnd)Polarized particle acceleration in Nuclotron:
Spin resonances
Q – betatron and spin precession tunes,
k, m – integers, p – number of superperiods (8 for Nuclotron) Power of the Spin resonances: P1,2 ~ 103∙P3,4
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y
s x
y y
s
y
sx
y
t
Qs - QresSpin tune dynamics
Protons, 12 GeV, Q ~ 0.01, t = 50 s
x ~ 0.2, BxLx = 0.18 T∙m, y ~ 0.2, Bs∙Ls = 4.7 T∙m,
x -y -2∙xy
x
QS = x∙y/2 per 1 turn
3. Polarized particle beams in NICA
(Contnd) Polarized proton acceleration in Nuclotron:
Crossing of spin resonances
BxBs Bs Bx
Bx
Fast spin rotator
x
y
s
Yu.Filatov
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4. NICA project status and plans
January 2008
NICA CDR MPD LoI
Conceptual Design Reportof
Nuclotron-based Ion Collider fAcility (NICA)(Short version)
January 2009
NICA CDR (Short version)
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4. NICA project status and plans (Contnd)
Ускорительно-накопительныйкомплекс NICA
(Nuclotron-based Ion Collider
fAcility)
Технический проект
Том I
Дубна, 2009
Ускорительно-накопительныйкомплекс NICA
(Nuclotron-based Ion Collider
fAcility)
Технический проект
Том II
Дубна, 2009
August 2009
NICA TDR (volumes I & II)
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4. NICA project status and plans (Contnd) Approved byDirector of JINR
academician A.N.Sisakian____________________
Nuclotron-based Ion Collider fAcility (NICA) "____ " 2009 г.
Technical Design ReportProject leaders: A.Sisakian,A.Sorin
TDR has been developed by the NICA collaboration:JINR
Physicists and engineers: N.Agapov, E.Ahmanova, V.Alexandrov, A.Alfeev, O.Brovko, A.Butenko, E.D.Donets,
E.E.Donets, A.Eliseev, A.Govorov, I.Issinsky, E.Ivanov, V.Karpinsky, V.Kekelidze, G.Khodzhibagiyan, A.Kobets,
V.Kobets, A.Kovalenko, O.Kozlov, A.Kuznetsov, V.Mikhailov, V.Monchinsky, A.Sidorin, A.Smirnov, A.Olchevsky,
R.Pivin, Yu.Potrebennikov, A.Rudakov, A.Smirnov, G.Trubnikov, V.Shevtsov, B.-R.Vasilishin, V.Volkov,
S.Yakovenko, V.Zhabitsky
Designers: V.Agapova, G.Berezin, V.Borisov, V.Bykovsky, A.Bychkov, T.Volobueva, E.Voronina, S.Kukarnikov,
T.Prakhova, S.Rabtsun, G.Titova, Yu.Tumanova, A.Shabunov, V.Shokin IHEP, Protvino O.Belyaev, Yu.Budanov, S.Ivanov, A.Maltsev, I.Zvonarev,
INR RAS, TroitskV.Matveev, A.Belov, L.Kravchuk
Budker INP, Novosibirsk V.Arbuzov, Yu.Biriuchevsky, S.Krutikhin, G.Kurkin, B.Persov, V.Petrov, A.Pilan
Chief engineer of the Project V.Kalagin, Chief designer of the Project N.Topilin
Editors: I.Meshkov, A.Sidorin
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4. NICA project status and plans (Contnd)
Since publication of the 1-st version of the NICA CDR
The Concept was developed, the volumes I and II of the
TDR have been completed:
Volume I – Part 1, General description
Part 2, Injector complex
Volume II – Part 3, Booster-Synchrotron
A brief review of the Project, its status and plans of
realization are presented here.
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
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Infrastructure
Control systems
PS systems
Diagnostics
Collider
Transfer channel to Collider
Nuclotron-NICA
Nuclotron-M
Booster + trans. channel
LINAC + trans. channel
KRION
2015201420132012201120102009
operation
comms/operatn
mountg+commssiong
Manufctrng + mounting
design
R & D
4. NICA project status and plans
Booster: magnetic system
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
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HILAC – Heavy ion linac RFQ + Drift Tube Linac (DTL),
under design and construction (O.Belyaev & the Team, IHEP,
Protvino).
4. NICA project status and plans
4.1. Injector
KRION - Cryogenic ion source of “electron-string” type
developed by E.Donets group at JINR. It is aimed to
generation of heavy multicharged ions (e.g.197Au32+).
RFQ Electrode
s
2H cavities of "Ural" RFQ(prototype)
Sector H-cavityof “Ural” RFQ
DTL(prototype)
E.D.DonetsE.E.Donets
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
To be commissioned in
2013.
KRION-6T Cryostat & vac. chamber
To be commissioned in
2013.
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4. NICA project status and plans
4.2. Booster
Superconducting Booster
in the magnet yoke
of The SynchrophasotronSynchrophasotron
yoke
B = 25 Tm, Bmax = 1.8 T1) 3 single-turn injections 2) Storage and electron
cooling of 8×109 197Au32+
3) Acceleration up to 600 MeV/u
4) Extraction & stripping
A.ButenkoV.MikhailovG.KhodjibagiyanN.Topilin
Nuclotron
Booster
“Nuclotron-type” SC magnets for Booster
2.3 m
4.0 mVladimir I. Veksler
Dismounting is in progress presently
To be commissioned in
2013.
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4. NICA project status and plans
4.2. Booster
(Contnd)
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4. NICA project status and plans
4.2. Booster
(Contnd)
2.3 m
4.0 m
Heavy ion LinacBeam injection
Slow extraction
Fast extractionTransfer to Nuclotron
RF system
Electron coolingsystem
Experimental areabld. 1 B
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4. NICA project status and plans
4.2. Booster
(Contnd)
Booster parameters
Circumference 214 m
Max B 27 T·m
Lattice type FODO
Superperiods 4
Periods 24
Strait sections 2 x 8,6 m
Dipol magnets 40 x 2 m
Maximum dipole field
1,8 T
Quadrupole magnets
48 x 0.4 m
Vacuum 10-11 Torr
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4. NICA project status and plans5.2. Booster
(Contnd)
SC hollow cable
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
SC magnet technologySC magnet technology
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4. NICA project status and plans 4.2. Booster
(Contnd)
electron gun
collector
cryogenic shield
superconducting solenoids
“warm” solenoids
E.Ahmanova, I.Meshkov,A.Smirnov, N.Topilin, Yu.Tumanova, S.Yakovenko
Electron cooling system of the
Booster
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
superconducting solenoids
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To be commissioned in
2013.
4. NICA project status and plans
4.3. Nuclotron-
NICA
To be designed, constructed and commissioned:
1.Injection system (new HILAC)
2.RF system – new version with bunch
compression
3.Dedicated diagnostics
4.Single turn extraction with fine
synchronization
5.Polarized protons acceleration in
Nuclotron
G.Trubnikov & the Team
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4. NICA project status and plans
4.4. Collider
“Twin magnets” for NICA collider rings
“Twin” dipoles
“Twin” quadrupoles
1 – Cos coils, 2 – “collars”, 3 – He header,
4 – iron yoke, 5 – thermoshield, 6 – outer jacket
Double ring collider; (B)max = 45 Tm, Bmax = 4 T
A.KovalenkoG.Khodjibagiyan
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
To be commissioned in
2014.
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4. NICA project status and plans4.4. Collider
Electron cooling system of the ColliderMax electron energy, MeV 2.5Max electron current, A 0.5Solenoid magnetic field, T 0.3
“Magnetized” electron beamSolenoid type: “warm” at acceleration columns superconducting at transportation and cooling
sections
HV generator: Dynamitron type
I.MeshkovA.SmirnovS.Yakovenko
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 20096 m
3 m
To be commissioned in
2014.Under development in collaboration with - All-Russian Institute for Electrotechnique (Moscow)
- FZ Juelich
- Budker INP
42O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
GSI/FAIR SC dipoles for Booster/SIS-100 SC dipoles for Collider
4. NICA project status and plans
4.5. NICA
Collaboration Budker INP Booster RF system Booster electron
cooling Collider RF system Collider SC magnets (expertise) HV electron cooler
for collider
Electronics (?)
IHEP (Protvino) Injector Linac
FZ Jűlich (IKP)
HV Electron cooler
Stoch. cooling Fermilab
HV Electron cooler
Beam dynamics Stoch. cooling
All-Russian Institute for Electrotechnique
HV Electron cooler
Corporation “Powder Metallurgy” (Minsk, Belorussia): Technology of TiN coating of vacuum chamber walls for reduction of secondary emission
BNL (RHIC)
Electron &Stoch. Cooling
ITEP: Beam dynamics in the collider
GSI/JINR/BNL2005 - 2009
Round Table Discussions I, II, III, IV JINR, Dubna, 2005, 2006, 2008
http://theor.jinr.ru/meetings/2008/roundtable/
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Thank you for your attention!
O. Kozlov NICA Accel. Complex Workshop at Univ. of Wroclaw Dec. 5-6, 2009
SPD 25
m
From Nuclotron
“Collider 2T”
Collider: C_Ring 380 м
Dipoles 2 Тл
Luminosity?
MPD
“Collider 2T” (Contnd)
Dipoles 2
Тл
G.Khodjibagiyan et al.
Внутренние пучки
ETA-NUCLEI, DELTA-2, LNS
Выведенные пучки
ALPOM, BECQUEREL, DELTA-SIGMA, ENERGY & TRANSMUTATION, FAZA-3, GAMMA-2, GIBS, MARUSYA, NIS, KRISTAL, TPD, STRELA, Med-Nuclotron, Radiobiological investigations
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