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Contents Introduction: Development of the NICA Concept and Technical
Contents Introduction: Development of the NICA Concept and Technical
May 2009: NICA TDR & MPD CDR will be completed
May 2009: NICA TDR & MPD CDR will be completed
4
4
Collider C = 251 m
Collider C = 251 m
6
6
1) to avoid a big problem of “chemistry kitchen” with radioactive
1) to avoid a big problem of “chemistry kitchen” with radioactive
3) …that increases ion stripping efficiency (after extraction from the
3) …that increases ion stripping efficiency (after extraction from the
Injector: 2
Injector: 2
?unnorm
?unnorm
2.1. Injector, Booster, Nuclotron
2.1. Injector, Booster, Nuclotron
12
12
34 injection cycles to Collider rings of 1
34 injection cycles to Collider rings of 1
2.2. Collider
2.2. Collider
The method was tested experimentally at ESR (GSI) with electron
The method was tested experimentally at ESR (GSI) with electron
Ring circumference, [m]
Ring circumference, [m]
?x_max /
?x_max /
18
18
Luminosity per one IP, cm-2
Luminosity per one IP, cm-2
20
20
Conclusion: Electron magnetization is much more preferable
Conclusion: Electron magnetization is much more preferable
22
22
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23
We began a common work with “Powder Metallurgy” Corporation (Minsk,
We began a common work with “Powder Metallurgy” Corporation (Minsk,
Collaboration with All-Russian Institute for Electrotechnique (Moscow)
Collaboration with All-Russian Institute for Electrotechnique (Moscow)
Upper ring
Upper ring
Lower ring
Lower ring
Protons, 1
Protons, 1
Luminosity, cm-2
Luminosity, cm-2
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30

Презентация: «Видеоролик 1 мая». Автор: Smirnov. Файл: «Видеоролик 1 мая.ppt». Размер zip-архива: 2501 КБ.

Видеоролик 1 мая

содержание презентации «Видеоролик 1 мая.ppt»
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1 1

1

2 Contents Introduction: Development of the NICA Concept and Technical

Contents Introduction: Development of the NICA Concept and Technical

Design Report 1. NICA scheme & layout 2. Heavy ions in NICA 2.1. Injector, Booster, Nuclotron 2.2. Collider 3. Polarized particle beams in NICA 4. NICA TDR status and nearest plans, problems to be solved Conclusion

2

I.Meshkov, NICA Status MAC Video-Conference JINR, May 20, 2009

3 May 2009: NICA TDR & MPD CDR will be completed

May 2009: NICA TDR & MPD CDR will be completed

3

4 4

4

5 Collider C = 251 m

Collider C = 251 m

5

6 6

6

7 1) to avoid a big problem of “chemistry kitchen” with radioactive

1) to avoid a big problem of “chemistry kitchen” with radioactive

uranium oxides at ion sourсe, etc.;

2) to increase ion energy accelerated in the Booster up to 608 MeV/u…

7

8 3) …that increases ion stripping efficiency (after extraction from the

3) …that increases ion stripping efficiency (after extraction from the

Booster and before injection into Nuclotron) up to 80% or more;

4) and allows us to diminish the number of injection pulses into the Booster to ONE PER CYCLE (2-3 pulses injection regime will be reserved “for safety”);

8

9 Injector: 2

Injector: 2

109 ions/pulse of 197Au32+ at energy of 6.2 MeV/u

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 608 MeV/u

Collider (45 Tm) Storage of 17 (20) bunches ? 1?109 ions per ring at 1?4.5 GeV/u, electron and/or stochastic cooling

Stripping (80%) 197Au32+ ? 197Au79+

2х17 (20) injection cycles

9

10 ?unnorm

?unnorm

?mm?mrad

Stage

E MeV/u

?p/p

lbunch m

Intensity loss,%

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

608

0.89

3.2E-4

3.1

Injection (after stripping)

594

0.89

3.4E-4

3.1

<20

0.051

After acceleration

3500

0.25

1.5E-4

2

<1

At extraction

3500

0.25

1?10-3

0.5

?Loss = 40% Nextr= 1E9

0.03

0.0085

0.0075

10

11 2.1. Injector, Booster, Nuclotron

2.1. Injector, Booster, Nuclotron

Bunch compression in Nuclotron

2. Heavy ions in NICA (Contnd)

Phase space portraits of the bunch Bunch rotation by “RF amplitude jump” 15 ? 120 kV

E – E0 , 2 GeV/div

2

1

?, 10 deg./div

11

I.Meshkov, NICA Status MAC Video-Conference JINR, May 20, 2009

12 12

12

13 34 injection cycles to Collider rings of 1

34 injection cycles to Collider rings of 1

109 ions 197Au79+ per cycle 1.7?1010 ions/ring

13

14 2.2. Collider

2.2. Collider

The previous scheme: 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 for luminosity preservation.

The new scheme: 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.

What is new?

2. Heavy ions in NICA (Contnd)

14

I.Meshkov, NICA Status MAC Video-Conference JINR, May 20, 2009

15 The method was tested experimentally at ESR (GSI) with electron

The method was tested experimentally at ESR (GSI) with electron

cooling (2008).

NICA: Trevolution = 0.85 ? 0.96 ?s, VBB ? 10 kV

15

16 Ring circumference, [m]

Ring circumference, [m]

251.52

B? max [ T?m ]

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

16

17 ?x_max /

?x_max /

y_max in FODO period, m

16.8 / 15.2

Dx_max / Dy_max in FODO period, m

5.9 / 0.2

?x_min / ?y_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

17

18 18

18

19 Luminosity per one IP, cm-2

Luminosity per one IP, cm-2

s-1

0.75E26

1.1E27

IBS growth time, s

650

50

Energy, GeV/u

1.0

3.5

Ion number per bunch

1E9

1E9

Number of bunches per ring

17 (20)

17 (20)

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

Incoherent tune shift ?Qbet

0.056

0.047

Beam-beam parameter ?

0.0026

0.0051

19

20 20

20

21 Conclusion: Electron magnetization is much more preferable

Conclusion: Electron magnetization is much more preferable

21

22 22

22

23 23

23

24 We began a common work with “Powder Metallurgy” Corporation (Minsk,

We began a common work with “Powder Metallurgy” Corporation (Minsk,

Belorussia) on development of TiN coating technology for reduction of secondary emission from stainless steel vacuum chamber walls.

24

25 Collaboration with All-Russian Institute for Electrotechnique (Moscow)

Collaboration with All-Russian Institute for Electrotechnique (Moscow)

FZ Juelich Budker INP

25

26 Upper ring

Upper ring

MPD

SPD

26

27 Lower ring

Lower ring

“Siberian snake”: Protons, 1 ? E ? 12 GeV ? (BL)solenoid ? 50 T?m Deuterons, 1 ? E ? 5 GeV/u ? (BL)solenoid ? 140 T?m

A problem: ring lattice in the strong solenoid field presence

MPD

27

28 Protons, 1

Protons, 1

E ? 12 GeV ? (BL)dipole ? 3 T?m Deuterons, 1 ? E ? 5 GeV/u ? (BL)dipole ? 5.8 T?m

28

29 Luminosity, cm-2

Luminosity, cm-2

s-1

1.1E30

1.1E30

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, ??mm?mrad

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

29

30 30

30

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