1 round table discussion iii searching for the mixed phase of strongly interacting matter jinr,...

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Round Table Discussion IIISearching for the mixed phase of strongly interacting matter

JINR, Dubna 5-6 November 2008

Project of The Nuclotron-based Ion Collider fAcility (NICA):

Status of The Technical Design Project

Igor N. Meshkov for NICA collaboration

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I.Meshkov, NICA Tech. Design Project Round Table III JINR, 5-6 November, 2008

Project leaders: A. Sissakian, A. Sorin

Accelerator group leaders: I. Meshkov, A. Kovalenko

Authors:JINRN.Agapov, V.Alexandrov, A.Alfeev, O.Brovko, A.Butenko, B.Vasilishin, V.Volkov, E.D.Donets, E.E.Donets, A.Eliseev, A.Fateev, I.Issinsky, V.Kalagin, G.Khodzhibagiyan, V.Karpinsky, V.Kekelidze, A.Kobets, V.Kobets, A.Kovalenko, O.Kozlov, A.Kuznetsov, I.Meshkov, V.Mikhaylov, V.Monchinsky, N.Lebedev, A.Olshevsky, A.Rudakov, V.Shchegolev, A.Sidorin, V.Shevtsov, A.V.Smirnov, A.Sissakian, A.Sorin, N.Timoshenko, V.Toneev, G.Trubnikov, V.Zhabitsky, S.Yakovenko

IHEPO. Belyaev, Yu. Budanov, I. Zvonarev, A. Maltsev

INR Tokyo UniversityV. Matveev, L. Kravchuck T.Katayama

Budker INPV.Arbusov, Yu.iryuchevsky, S,Krutikhin, G.Kurkin, B.Persov, V.Petrov, F.Pilan

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Contents1. NICA/MPD Concept

2. Status of the development and design of the NICA

elements

2.1. Injector: Ion Source + Linac

2.2. Booster

2.3. Stripping station

2.4. Nuclotron – “The project Nuclotron-M”

2.5. Collider

2.6. Transfer lines

2.7. Control and diagnostics

2.8. Civil engineering

2.9. Project schedule

3. Polarized beams in NICA

4. NICA Collaboration

ConclusionI.Meshkov, NICA Tech. Design Project Round Table III JINR, 5-6 November,

2008

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1. NICA/ MPD Concept

January 2008


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The intention and the goal:

Development of the JINR basic facility for generation

of intense heavy ion and polarized nuclear beams

aimed at searching for the mixed phase of nuclear

matter and investigation of polarization phenomena

at the collision energies up to sNN = 11 GeV/u,

i.e. 238U x 238U in the energy range of 1 ÷ 4.5 GeV/u

at average luminosity (at 3.5 GeV/u)

Laverage= 11027 cm-2s-1.



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1. Minimum of R & D

2. Application of existing experience

3. Co-operation with experienced research centers

“The Basic Conditions”

for the Project Development

and Some Consequences


I.Meshkov, NICA/MPD Project STORI’08 IMP, Lanzhou, 15-19 September, 2008

4. The reference particle for the heavy ion project:

238U92+ at 3.5 GeV/amu in collider

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“The Basic Conditions” for the Project Development and Some Consequences

Choice of an existing building for dislocation

of the collider

Collider circumference is limited by ~ 250 m

Luminosity

4. Cost – as low as possible5. Realization time – 4 – 5 years

High beam intensity,

multibunch regime,

low beta-function in Interaction Point,…………………………………………………



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Nuclotron

Krion & Linac

Booster

ColliderC = 251.2 m

Existing beam lines(solid target exp-s)

MPD

Spin Physics Detector (SPD)

Bldng 205



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Booster (25 Tm)2(3?) single-turn

injections, storage of 3.2×109,

acceleration up to 50 MeV/u,

electron cooling,acceleration

up to 440 MeV/u

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 bunches 1109 ions per ring at 14.5 GeV/u,

electron and/or stochastic cooling

IP-1 IP-2

Stripping (40%) 238U32+ 238U92+

Two superconducting

collider rings

2х17 injection

cycles

Bunch compression (“overturn” in phase space)

Injector: 2×109 ions/pulse of 238U32+ at energy of 6 MeV/u



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34 injection cycles of 1109 ions 238U92+ per cycle1.71010 ions/ring L 1∙10E27 cm-2∙s-1

3.5 GeV/u

400 MeV/u

100(50?) MeV/u 6 MeV/u

470 keV/u

25 keV/u 2s 0.4s 2s 3s 4.5s 153 s

KRION RFQ RFQ DTL Booster Nuclotron Collider

Eion/A

Time Table of The Storage Process

238U32+

2-3 cyclesof injection,

electroncooling (?)

electroncooling

stripping to

238U92+

Bunch compression



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2. Status of the development and design of the NICA elements 2.1. Injector: Ion Source + LinacElectron String Ion Sourse (ESIS) „KRION“ –

experiments on generation of Au32+,Au51+ and Au69+

ions – in progress, new ESIS “KRION-6T”: B 6.0 T, Ee 25 keV -

– in progress The goals:Ions Au32+(U32+) Au51+(U64+) Au69+ Extraction frequency, Hz 5(40) 0.5 0.2N_ions per pulse 210E9 510E8 310E8Extraction time, s 8 8 8

The Schedule:Commissioning of the working

device December 2010,

Test at Nuclotron 2011Test at the new linac 2012

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2. Status of the development and design of the NICA elements

Heavy Ion Linac RFQ + RFQ DTL (IHEP, Protvino) Technical design – in progress in accordance with the schedule; Interim technical design report of the 1st section (RFQ) is completed;

2.1. Injector: Ion Source + Linac

Main parameters of RFQInjection energy 200 keV/ion Acceptance Extraction energy 473 keV/u Normalized 0.5

mmmradUnnormalized 70

mmmrad

RFQ Electrodes 2H cavities of "Ural" RFQ

(prototype)

The goal – TDR of the linac & working drawings December 2009

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2.2. Booster

Nuclotron

Booster

B = 25 Tm, Bmax = 1.8 T1) 3 single-turn injections 2) Storage and electron

cooling of 8×109 238U32+

3) Acceleration up to 440 MeV/u

4) Extraction & stripping

Superconducting Booster in the magnet core of The Synchrophasotron

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2.2.

Booster

2.3 m

4.0 m

The Booster Location in “The Belly”

of The Synchrophasotron

Dismounting in progress…

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The Booster FODO period



2.2. Booster

SC dipoles – “Nuclotron/SIS-100 type”

Superconducting Booster in the magnet core of The Synchrophasotron

See the next report

of A.Kovalenko

Status: technical project in progress

Working drawings during 2009

Beginning of manufacturing Nov. 2009

Synchrophasotron yoke

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2.2. Booster

RF system of Cooler Storage Ring

of Heavy Ion Research Facility

in Lanzhou (HIRFL) – analog of

The RF system for The Booster

of NICA.

RF System

Technical Report of RF System has been completed

by the group of Budker INP in September 2008:

2 RF stations by R 12.5 M each one,

1.5 years for manufacturing

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Status: technical project in very beginning

Working drawings end of 2009

Beginning of manufacturing Nov. 2009



2.2. Booster Electron cooling system of the Booster

The prototype: Electron Cooler EC-35 (Budker INP)1 – electron gun, 2 – electrostatic plates for compensation of centrifugal drift, 3 toroidal solenoid, 4 – straight solenoids, 5 – magnetic shield, 6 – collector, 7 – ion beam orbit magnetic correctors, 8 – ion beam channel

The JINR concept: the electron cooler with superconducting magnetic system

Reconstruction of The

El_Cooler Test Bench

was started at DLNP.

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2.3. Stripping stationFirst parameters estimates have been

done,

but technical design was not started yet.

Radiation safety conditions are under

examination

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2.4. Nuclotron

“The project Nuclotron-M” is in

progress

see report of G.Trubnikov

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2.5. Collider

Ring circumference, [m] 251.0

B max [ Tm ] 44.0

Ion kinetic energy (U92+), [GeV/u]

1.0 4.36

Dipole field (max), [ T ] 4.0

Quad gradient (max), [ T/m ] 29.0

Number of dipoles / length 24 / 2.8 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 7.2 m

General Parameters

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2.5. Collider

βx_max / βy_max in FODO period, m

20 / 17

Dx_max / Dy_max in FODO period, m

6.1 / 0.1

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) 8 m

Beam crossing angle at IP 0

Betatron tunes Qx / Qy 5.5 / 5.2

Chromaticity Q’x / Q’y -12.4 / -12.2

Transition energy, _tr / E_tr 5.0 / 4 GeV/u

RF system harmonics amplitude, [kV]

70 100

Vacuum, [ pTorr ] 100 10

General Parameters (Contnd)

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2.5. Collider

Energy, GeV/u 1.0 3.5

Ion number per bunch 1E9 1E9

Number of bunches per ring 17 17

Rms unnormolized beam emittance, ∙mm mrad 3.8 0.3

Rms momentum spread 1E-3 1E-3

Rms bunch length, m 0.3 0.3

Luminosity per one IP, cm-2∙s-1 0.75⋅E26

1.1E27

Incoherent tune shift Qbet 0.056 0.047

Beam-beam parameter 0.0026 0.02

Luminosity “life time” limited by IBS, s

650 50

Collider beam parameters and luminosity

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2.5. Collider Collider scheme (Version Aug. 2008)

PU

Kicker PU

Kicker

MPD

RF

RF

Injection channels

Beam dump

Beam dump

SPD

Spin rotator

Spin rotator

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2.5. Collider Collider Scheme (Version Oct. 2008)

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2.5. Collider

Magnetic system

“Twin” dipoles

“Twin” quadrupoles

1 – Cos coils, 2 – “collars”, 3 – He header, 4 – iron yoke,

5 – thermoshield, 6 – outer jacket

See the next report

of A.Kovalenko

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2.5. Collider IBS Heating & electron/stochastic

cooling


1

pyxsyx

54bunch

2

4

IBS functionslattice,,,(F)p/p(

N

A

Z

Intrabeam scattering (IBS) characteristic time:

For NICA: 17 bunches x 10E9 238U92+ ions at s = 0.3 m, etc.,…

IBS ~ 20 – 50 s

Electron cooling: 2.4 MeV x 0.5 A ecool 50 s

Stochastic cooling: W = 3 GHz scool 1000 s

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General scheme

Electron cooling parameters and problems:

Electron beam 2.4 MeV x 1 A

ion recombination hollow electron

beam?

HV power supply

HTSC solenoid + “hot” electron collectorB


2.5. Collider Electron cooling 1st scheme

The 1st scheme: disadvantage “twin system”

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B

The 2nd scheme: disadvantage at acceleration coulomb entrance“recovering” electrons enter solenoid field of opposite direction:

p ~ 100 keV at B = 0.1 T


2.5. Collider Electron cooling 2nd scheme

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2.5. Collider Electron cooling 3rd scheme


The 3rd scheme: advantage 1) common HV power supply, 2) lenses

B B

disadvantages 1) two SC solenoids,

2) possible coupling of both ion beams via cooling electron beams

a damping feed back may be necessary

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2.5. Collider Stochastic cooling


1) Unrealistic for present “Concept Parameters” of NICA collider

2) Requires a new concept development:

non-zero beam crossing angle at IP,

increase of ion bunch number nbunch ~ 70,

new ion storage scheme “barrier bucket” RF system.

All this simplifies stochastic cooling system making it

of “conventional” parameters (like at COSY, for instance). The new concept does not contradict to the

present one! And has to be examined carefully…

T.Katayama,31 October

2008

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2.5. Collider Stochastic cooling


Stoch.Coolg PU’s : 2+2

m

Stoch.Cooling kickers : 2+3 m

Feedback

lines:

x, y, s

Proposed scheme (T.Katayama, 31 Oct.

2008)

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2.5. Collider Collider RF System


Res. frequency, MHz 107 ÷ 120

Outer diameter, cm 38

Inner diameter, cm 7

Gap voltage, kV 100

Gap length, cm 5

Shunt impedance, kOhm

357.2

Quality factor 2786

Power loss, kW 13.92

Cavity length, m 0.744

There are two reasonable technical solutions : - the quarter-wave resonant cavity loaded with the capacitive gap, - 2 quarter-wave resonators switched on towards each other and loaded with the common capacitive gap.

694 50

Ø 7

0

Ø 3

80

Tuning plunger Accelerating gap

Quarter-wave cavity

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2.6. Transfer lines

1. KRION – Linac

2. Linac – Booster

3. Booster – Nuclotron

4. Nuclotron – collider rings

… in very beginning…

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2.7. Control and DiagnosticsNICA Control

System

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2.7. Control and Diagnostics


NICA Control

System

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2. Status of the development and design of the NICA elements2.7. Control and

DiagnosticsNICA

DiagnosticsBeam Intensity Beam current transformers (BERGOZ)

Ibeam - “slow” BCT I(t) – fast BCT

Ionization chamber Sec. emission monitor

JINR


Beam position monitors (JINR)

Schottky noise monitors - p/p, frev, Qbet

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2. Status of the development and design of the NICA elements2.7. Control and

DiagnosticsNICA

Diagnostics


Beam profile monitors

Residual gas ionization profile monitor (JINR)

Multiwire Proport. Chamber Sec. Emission Grid Montr. Fiber Profile Monitor

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2.8. Civil engineering

2 options:

1) building #205 C_collider ring

251 m

2) new tunnel + 4 buildings +

transfer lines

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Collider location

in the building #205



Collider in the building

#205

2.8. Civil

engineering

1 м5 м

0.7 м

3 м

3 м

?

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Stage I Nuclotron-М subproject and infrastructure (2008-2010) development

R&D programs Technical Design Reports on NICA and MPD

Stage II Design and manufacturing of NICA & MPD

(2008-2012) elements

Infrastructure development

Stage III Construction and assembling of (2010-2012) NICA & MPD

Stage IV NICA commissioning, MPD start-up (2013-2014)


2.9. Project schedule


Beginning of The Experiments –

2013 - 2014

NICA TDR – May 2009

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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

11E30

Polarized proton beams parameters

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SPD

B

Spin rotator


Polarized beams polarization preservation3. Polarized beams in NICA

SPD

B

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Particle a

p 1.792846

d -0.142978

Protons, 1 E 12 GeV (BL)solenoid 50 T∙m

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


Polarized proton beams polarization preservation


protons

deut

eron

s

1 3 5 7 9 11 130

50

100

150

200

BL_p E( )

BL_d E( )

E

200

150

BL [T∙m] 100

50

01 3 5 7 9 11 13

E [GeV/u]

Spin rotation in solenoid|| = a1

B

)BL(

ion

solenoid||

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Spin rotator

B


Polarized beams injection


From NuclotronS

a1B

)BL(

ion

dipole

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Polarized beams injection


protons

deuterons

1 3 5 7 9 11 132

3

4

5

66

2

Btr_L_p E( )

Btr_L_d E( )

131 E

6

5

BL [T∙m] 4

3

21 3 5 7 9 11 13

E [GeV/u]

Spin rotation in dipole = /2

a1B

)BL(

ion

dipole

Protons, 1 E 12 GeV (BL)dipole 3 T∙m

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

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4. 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 Stochastic

cooling

GSI/FAIR

SC dipoles for Booster/SIS-100

SC dipoles for Collider/SIS-300 (?)

BNL (RHIC) Stoch. Cooling

Fermilab HV Electron

cooler


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Conclusion

The NICA project realization meets already and will meet in future many obstacles –both scientific/technical

and “political” ones.

But all they do not seem to be insoluble!

Спасибо за Ваше внимание!

1 round table discussion iii searching for the mixed phase of strongly interacting matter jinr,...

Documents

project development

project nuclotron

design project round

project leaders

nica mpd concept

nica collaboration slide

project schedule

nica elements