1 itep october 16, 2009 nica project nuclotron-based ion collider facility i.meshkov for nica...

1

ITEPOctober 16, 2009

NICANICA ProjectProjectNNuclotron-baseduclotron-based I Ionon CColliderollider ffAAcilitycility

I.MeshkovI.Meshkovforfor NICA CollaborationNICA Collaboration

RFRC School-SeminarRFRC School-Seminar

2

ContentsIntroduction:

Relativistic nuclear physics today & “the physics case” of NICA

1. Two projects- FAIR/CBM & NICA/MPD

2. NICA scheme & layout

3. Heavy ions in NICA

3.1. Operation regime and parameters

3.2. Collider

4. Polarized particle beams in NICA

5. NICA project status and nearest plans

6. RHIC – on the way to √s = 5 GeV/u

Conclusion

I.Meshkov, NICA Project RFRC School-Seminar October 16, 2009

3 I.Meshkov, NICA Project RFRC School-Seminar October 16, 2009

QGP formation and

hydrodynamic expansion

Hadronisation,hadronic phase

& chemical freeze-out

“Chemical freeze-out” – finish of inelastic interactions;“Kinetic freeze-out” – finish of elastic interactions.___________________________________ *) freeze-out – here means “to get rid”

Start of the collision

pre-equilibrium

Hadronic phase &kinetic freeze-out

What is The Mixed Phase? – - a mixture of QGP & barionic matter!

http://theor.jinr.ru/twiki-cgi/view/NICA/WebHome

Introduction: Relativistic nuclear physics today & “the physics case” of NICA

Evolution of collision region in NN Interaction

4



The 1980th: AGS (BNL), NA49, NA50 and CERES at SPS (CERN),

STAR & PHENIX at RHIC (BNL)

Coming soon: ALICE at LHC (CERN)

(NA49) NA61 (2011?) at SPS (CERN)

STAR & PHENIX at RHIC (BNL) RHIC-BES

Precursors, Predecessors and Hints(Предвестники, предшественники и намёки)

1970 – Synchrophazotron (JINR): observation of

dd -jet : Ejet > 2mnc2 first cumulative effect! (V.Sviridov,

V.Stavinsky)

5

http://theor.jinr.ru/twiki-cgi/view/NICA/WebHome

n/n_nuclear

(n_nuclear = 0.16 fm-3)


critR

HIC (2

009)


stars

6


Киральная*) симметрия сильного взаимодействия – приближённая симметрия сильного взаимодействия относительно преобразований, меняющих чётность.

(ФЭС, т.2, «Сов. Энциклопедия», 1990)

*)chiral symmetry, от греч. cheir - рука


7



Baryonic chemical potential [MeV]

Elab s GeV/u 5 3.60 10 4.73 30 7.75 80 12.42 RHIC (?) 158 17.36 NA49/61 (SPS)

NICA & CBM

1 fm/c ~ 3∙10-24 s

8



Precursors, Predecessors and Hints (Contnd)

NA49 & NA50 at SPS 208Pb82+ x 208Pb82+, 2x158

GeV/u

Hypothesis of quark–gluon plasma (QGP) –

- a “mirage” never proved been observed

Nevertheless, there are all indications of a qualitatively new form of matter produced in

central Au x Au collisions at RHIC!(see further)

9



Search for The Mixed Phase

ps

py

Anisotropy in momentum space

Result:

Elliptic flow of central fireball matter

What to look

for ?

One has to measure

the ellipticity parameter

(Etotal) = ps/py

10



Search for The Mixed Phase (Contnd)What to look

for ?

Thermodynamics analog: boiling water –

- a flow of bubbles fluctuates

tremendously.

Which fluctuations?

Much more convincing: Fluctuations! They are “a sign” of the

mixed

phase: system becomes unstable

at the two-phases

stage!

11


Search for The Mixed Phase (Contnd)What to look for ?

Pb + Pb

(Au + Au)

p+p

R

Main candidate: energy dependence of particle ratio and its fluctuations, for instance R = NK+/N+


Enhanced fluctuationsnear The Critical Point

The task: to locate the critical point using correlation/fluctuation measurements:

R = (R - R)2

Rajagopal, Shuryak, Stephanov

s

R


FAIR (Darmstadt, Germany) – Compressed Baryonic Matter

1. Two projects- FAIR/CBM & NICA/MPD

SIS-300

238U

Detector

Fixed target

238U92+

34 GeV/u

Center

of mass

Detector

Center of mass

NICA (JINR, Dubna, Russia) – MultiPurpose Detector

197A79+ 4.5 GeV/u

197A79+

4.5 GeV/u

13

Parameter SIS-300 NICA

Operation mode Fixed target Collider

Ions 238U92+ 197Au79+

Max. magnetic rigidity, T∙m

300 45

Ion energy, GeV/u 34 1 4.5

Etotal(cms) √s, GeV/u 8.2 4 11.0

Luminosity, 1027 cm-2∙s-1 >100 0.075 1.1


1. Two projects- FAIR/CBM & NICA/MPD (Contnd)

labkin_ion

2labtotal_ion

2 EMc2EMc2s1

422lab

total_ion2

42labkin_ion

2cmstotal

cMmEMc2

cMmEMc2Es


1. Two projects- FAIR/CBM & NICA/MPD (Contnd)

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 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 )

15

2. 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

16

2. NICA scheme & layout

(Contnd)

“Old” Linac LU-20

KRION + “New” HILACBooster

Nuclotron

Collider MPD

SPD Beam dump




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

3.1. 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

Bunch compression (RF phase jump)

18

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


(Contnd)

Bunch parameters dynamics in the injection

chain


parameters


19


(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


parameters

A.Eliseev


20


(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


parameters

A.Eliseev


21

0

0,5

1

1,5

2

0 2 4 6


(Contnd)Time Table of The Storage

Process


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]


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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(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


(Contnd) 3.2. Collider

General Parameters


24

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


(Contnd)3.2. Collider General parameters (Contnd)


25

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


(Contnd)2.2. Collider General parameters (Contnd)

Collider beam parameters and luminosity


26

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.


(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)


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Revolution period

V(t)

Stack

phase

Cavity

voltage

(p)io

n

InjectedbunchPhase domain

20


(Contnd)2.2. Collider

(Contnd) Barrier Bucket Method

Revolution period

V(t)

time

Cavity

voltage

Time domain

Ion storage with “barrier bucket” (BB) method:Periodic voltage pulses applied to a low quality cavity (“meander”)when stochastic or electron cooling is ON.


28



(Contnd) Barrier Bucket Method

Particle motion in “the phase domain”

0dp

dp

Cavityvoltage phas

e

(p)io

n

Phase domain

2

V(t)

0

Separatrix:

BB

22BB

Mc

ZeV

p

p

At BB = 2 the Formula

coincides with that one for harmonic RF


29



(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)In reality RF voltage pulses can be (and are actually) of nonrectangular shape

Cooling is ON


30

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]

!




(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]

31

B [kG]

8

6

4

2

Te = 10 eV


(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

I.Meshkov, Status of NICA Project

VIII Sarantsev Seminar Alushta, September 1, 2009Conclusion: Electron magnetization is much more preferable

!



(Contnd) 3.2. Collider: electron cloud effect

Electron cloud

effect

,lZr

b)N(

spacee

22

necessarybunch

33


(Contnd) 3.2. Collider: electron cloud effect

Electron cloud formation criteria

The necessary condition:

The sufficient condition (“multipactor effect”):

,lZr

b)N(

spacee

22

necessarybunch

Here c is ion velocity, Z – ion charge number, b – vacuum chamber radius,

re – electron classic radius, lspace – distance between bunches,

me – electron mass, c – the speed of light,

crit ~ 1 keV – electron energy sufficient for secondary electron generation.

For NICA parameters (197Au79+ ions)

(Nbunch)necessary ~ 7108, (Nbunch)sufficient ~ 6109.

.cm2Zr

b)N(

2e

crit

esufficientbunch


34


(Contnd)What is “old” and what is

new?3.2. Collider: the problems to be solved

Collider SC dipoles with max B up to 4 T, Lattice and working point “flexibility”, RF parameters (related problem), Single bunch stability, Vacuum chamber impedance and multibunch

stability, Stochastic cooling of bunched ion beam, Electron cooling at electron energy up to 2.5

MeV


35

4. Polarized particle beams in

NICA Longitudinal polarization

formation MPDYu.Filatov,I.Meshkov


BB

Upper ring

SPD

Spin rotator:

“Full Siberian snake”

“Siberian snake”: Protons, 1 E 12 GeV (BL)solenoid 50 T∙m

Deuterons, 1 E 5 GeV/u (BL)solenoid 140 T∙m

36


(Contnd)Longitudinal polarization formation

(Contnd) MPD

SPD

B

Lower ring

“Full Siberian snake”


37

From NuclotronS

a1B

)BL(

ion

dipole


(Contnd)

Spin rotator

B

Polarized particle beams injection

~ 900


Protons, 1 E 12 GeV (BL)dipole 3 T∙m

Deuterons, 1 E 5 GeV/u (BL)dipole 5.8 T∙m

38

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


(Contnd)

Parameters of polarized proton beams in collider


39

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


(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


40

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


(Contnd) Polarized proton acceleration in Nuclotron:

Crossing of spin resonances

BxBs Bs Bx

Bx

Fast spin rotator

x

y

s

Yu.Filatov


41

5. 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)


42

5. 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)

43



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 collaborationp: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

44



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.

45

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


Booster: magnetic system


46

HILAC – Heavy ion linac RFQ + Drift Tube Linac (DTL),

under design and construction (O.Belyaev & the Team, IHEP,

Protvino).


5.1. 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


To be commissioned in

2013.

KRION-6T Cryostat & vac. chamber


2013.

47


5.2. 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 440 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


2013.


48


5.2. Booster

(Contnd)


49


5.2. 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


50


5.2. 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


51

Working point ~ 5.8 / 5.85

Chromaticity -6.5

p/p (max/min) 1E–3 / 8E–4

Norm. emittance

1 ·mm·mrad

Beta function (max)

14.5 m


5.2. Booster

(Contnd)

Booster superperiod lattice functionsBooster superperiod lattice functions


Booster FODO latticeBooster FODO lattice

52


5.2. Booster

(Contnd)


Ring equipmentRing equipment

53


5.2. Booster

(Contnd)

Injection & extractionInjection & extraction

Injection schemeInjection scheme

Injection pulses

First Second Third

Closed orbit displacement

t

Three pulses of single turn injection


Extraction schemeExtraction scheme

54

Vacuum system equipment

Varian TriScroll 300 pumps

42

Pfeiffer TMU 071 YP DN63 CF HV pumps

28

Pfeiffer TMU 521 YP DN160 CF HV pumps

14

Ion pumps 80l/s 6

IKR 060, DN40 CF 36

Pirani gauge 6

HV valves CE44

DN63 & DN160 70

Vacuum, Torr 1E-11

5. NICA project status and plans5.2. Booster

(Contnd)Vacuum systemVacuum system


55


(Contnd)

SC hollow cable


SC magnet technologySC magnet technology

56


(Contnd)Main Power Supply systemMain Power Supply system

Main power supply unit:Maximum current 12 kA

Voltage 250 V


57

RF system parameters

Frequency range,MHz

0.6 2.4

Maximum voltage amplitude, kV

10

Number of cavities

2

Cavity length, m

1.4

RF tube type EIMAC 4XC15.000A


(Contnd)RF system (designed by Budker INP)


58

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


59

5. NICA project status and plans 5.2. Booster

Contnd)Electron cooling system of the Booster (Contnd)

e-gun e-collector


60


2013.


5.3. 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


61


5.4. 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



2014.

62

Under development in collaboration with - All-Russian Institute for Electrotechnique (Moscow)

- FZ Juelich

- Budker INP I.Meshkov, NICA Project RFRC School-Seminar October 16, 2009

5. NICA project status and plans5.4. 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

6 m

3 m


2014.



5.5. “Collider

2T”

V.KalaginI.MeshkovV.MikhailovG.Trubnikov

MPD

SPD

25

m

G.Khodgibagiya

n

Collider:C_Ring 380 м

Dipoles 2 Тл

Luminosity?

From Nuclotr

on

“The ambush regiment”


GSI/FAIR SC dipoles for Booster/SIS-100 SC dipoles for Collider


5.5. 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

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/

65

Colliding

particles

Heavy ions

Protons

Particle energy, GeV/u

100 250

√s, GeV/u 202 502

Luminosity (cm2 sec1)

2E26(Au79+

)

1E31

Bunch number 112 ?

Orbit length, m 3834


6. RHIC – on the way to √s = 5

GeV/uRelativistic Heavy Ion Collider (RHIC)

Standard parameters

Colliding

particles

Au79+ x Au79+

Energy range, GeV/u

1.6 9.1

√s, GeV/u 5 20

critRHIC or “Low-energy RHIC”

(since 2007)

critRHIC

RHIC-BES (2009)

BES = Barion Energy Scan


6. RHIC – on the way to √s = 5 GeV/u

(Contnd) RHIC-BES”

Stochastic cooling? A big question too intense and bunched

beams! Electron cooling? High Energy electron cooling: 0.9 5 MeV

E-Cooler at Femilab

4.34 MeV x 0.5 A DC current

9 m

RHIC e-cooler

Schedule: commissioning in 2013

Budget: $ 5M (not funded yet!)

Problems:Low emittance formation IBS and Luminosity preservation

Cooling

Stochastic cooling?Electron cooling??

67 I.Meshkov, NICA Project Status ANKE/PAX Workshop Dubna, June 22-26, 2009

NICA = “Go and win!” (Greek)

Thank you for your attention!

1 itep october 16, 2009 nica project nuclotron-based ion collider facility i.meshkov for nica...

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