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Polarized Proton Beam Acceleration at Polarized Proton Beam Acceleration at

Nuclotron with the use of the Nuclotron with the use of the

Solenoid Siberian SnakeSolenoid Siberian Snake

Yu.N. Filatov1,3, A.D. Kovalenko1, A.V. Butenko1,

A.M. Kondratenko2, M.A. Kondratenko2 and V.A. Mikhaylov1

1Join Institute for Nuclear Research, Dubna, Russia 2 Science and Technique Laboratory Zaryad, Novosibirsk, Russia

3Moscow Institute of Physics and Technology, Dolgoprydny, Russia

March 18 –19, 2013, Dubna, Russia

Joint Institute for Nuclear ResearchInternational Workshop

NICA-SPIN 2013

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Polarized proton and deuteron in Nuclotron

B. Issinskii et al., “Deuteron Resonance Depolarization Degree in JINR Nuclotron,” in Proc. of VI Workshop on HESP, Protvino, 1996

N. I. Golubeva et al., “Study of Depolarization of Deuteron and Proton Beams in Nuclotron Ring,” Preprint JINR R9-22-289 (Dubna, 2002)

S.Vokal et al. “Program of Polarization Studies and Capabilities of Accelerating Polarized Proton and Light Nuclear Beams at the Nuclotron of the Joint Institute for Nuclear Research”, Physics of Particles and Nuclei Letters, 2009, Vol. 6, No. 1, pp. 48–58.

I.Meshkov and Yu.Filatov , “ Polarized hadrons beams in NICA project”, 19th International Spin Physics Symposium, 2010 Jülich, Germany

A.Kovalenko et al. The NICA Facility in polarized proton operation mode, IPAC’11

Yu. Filatov et al., Polarized Proton Beam Acceleration at Nuclotron with the use of the Polarized Proton Beam Acceleration at Nuclotron with the use of the Solenoid Siberian SnakeSolenoid Siberian Snake, NICA-SPIN 2013, March 18- 19, 2013, Dubna

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2 4 6 8 1 0 1 2

1

1

2

2 4 6 8 1 0 1 2

1

1

lg(w/wD)

Ep , GeVwD = 7.310-4

lg(w/wD)

wD = 7.310-4 Ep , GeV

2.Integer res. spin = k

Spin resonances at Nuclotron

lg(w/wD)

2 4 6 8 1 0 1 2

2

1

1

3. Nonsuperperiodic res. spin = m Qy , m kp

Ep , GeV

lg(w/wD)

4. Coupling res. spin = m Qx , m kp

wD = 7.310-4

2 4 6 8 1 0 1 2

2

1

1Ep , GeV

wD = 7.310-4

1.Intrinsic res. spin = kp Qy

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5 16

14

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Dangerous resonances are marked with red caps dB/dt = 1 T/s

An option: acceleration up to 6 GeV and extraction into NICA collider for further acceleration up to 12 GeV max.

Yu. Filatov et al., Polarized Proton Beam Acceleration at Nuclotron with the use of the Polarized Proton Beam Acceleration at Nuclotron with the use of the Solenoid Siberian SnakeSolenoid Siberian Snake, NICA-SPIN 2013, March 18- 19, 2013, Dubna

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Solenoid Siberian Snake in Nuclotron

Total longitudinal field integral:

(B||L)max= 21 Tm

Full Siberian Snake Partial Siberian SnakeTotal longitudinal field integral:

(B||L)max=10,5 Tm (y 6.8)Emax=6 GeV

2/zy

y is angle between polarization and vertical axis

2/ y

Yu. Filatov et al., Polarized Proton Beam Acceleration at Nuclotron with the use of the Polarized Proton Beam Acceleration at Nuclotron with the use of the Solenoid Siberian SnakeSolenoid Siberian Snake, NICA-SPIN 2013, March 18- 19, 2013, Dubna

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The scheme of the solenoid coupling compensation

are angles between quadrupole normal and radial accelerator axis 21, xBG yi / is quadrupole gradient

Installation Siberian Snake into two free spaces

][m,/ -2BGk ii

LS, m L1, m L2, m L, m 1 2

2,2 0,2 0,5 0,15 50 50

Ek, GeV B||, T k1, m-2 k2, m-2 G1, T/m G2, T/m GD, T/m

/2 5/13 2,4/5,6 0,36 0,75 6,7/16 14/33 14/33

5/13 4,8/11 0,63 1,13 12/28 21/50 14/33

is the structural defocusing quadrupoleD -2m ,750Dk

Yu. Filatov et al., Polarized Proton Beam Acceleration at Nuclotron with the use of the Polarized Proton Beam Acceleration at Nuclotron with the use of the Solenoid Siberian SnakeSolenoid Siberian Snake, NICA-SPIN 2013, March 18- 19, 2013, Dubna

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Spin Matching of the Proton Polarization

Extraction into NICA Collider

Extraction into the Main Experimental Hall

Injection into Nuclotron G

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The angle between polarization and velocity at injection energy is equal to

G24

The angle between polarization and velocity when transferring the beam from Nuclotron into NICA Collider

G45

The angle between polarization and velocity when transferring the beam from Nuclotron into the Main Experimental Hall

In the case of Partial Siberian Snake the additional angle appears between polarization and vertical axis which equal to 2/zy

Yu. Filatov et al., Polarized Proton Beam Acceleration at Nuclotron with the use of the Polarized Proton Beam Acceleration at Nuclotron with the use of the Solenoid Siberian SnakeSolenoid Siberian Snake, NICA-SPIN 2013, March 18- 19, 2013, Dubna

)2/(4/ zy

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Summary & Outlook

Предложена схема ускорения пучка поляризованных протонов с помощью соленоидальной сибирской змейки. Требуемый интеграл продольного поля при ускорении до 5 ГэВ в режиме полной змейки составляет 22 Тм. Этот интеграл поля позволяет сохранить поляризацию до максимальной энергии протонов в режиме частичной сибирской

змейки.

Предложена специальная компактная схема компенсации связи вертикальных и радиальных бетатронных колебаний, которая позволяет

разместить соленоидальную сибирскую змейку в Нуклотроне.

Предложенная схема соленоидальной сибирской змейки позволяет использовать Нуклотрон в качестве инжектора пучка поляризованных

протонов в коллайдер НИКА и в экспериментальный зал.

Аналогичную схему соленоидальной сибирской змейки можно

использовать для сохранения поляризации протонов в бустере.

Yu. Filatov et al., Polarized Proton Beam Acceleration at Nuclotron with the use of the Polarized Proton Beam Acceleration at Nuclotron with the use of the Solenoid Siberian SnakeSolenoid Siberian Snake, NICA-SPIN 2013, March 18- 19, 2013, Dubna

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Thank you for your attention!