Transcript Document

Joint Institute for Nuclear Research
International Workshop
NICA-SPIN 2013
March 18 –19, 2013, Dubna, Russia
Polarized Proton Beam Acceleration at
Nuclotron with the use of the
Solenoid 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
Science and Technique Laboratory Zaryad, Novosibirsk, Russia
3Moscow Institute of Physics and Technology, Dolgoprydny, Russia
2
1
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
Solenoid Siberian Snake, NICA-SPIN 2013, March 18- 19, 2013, Dubna
2
An option:Spin
acceleration
up to 6at
GeV
and extraction into
resonances
Nuclotron
NICA collider for further acceleration up to 12 GeV max.
Dangerous resonances are marked with red caps
dB/dt = 1 T/s
lg(w/wD)
1.Intrinsic res. spin = kp  Qy
2
1
1
11
2
4
6
8
10
Ep , GeV
2
3. Nonsuperperiodic res.
spin = m  Qy , m  kp
1
2
2
4
4
6
wD = 7.310-4
1
1
lg(w/wD)
44
12
wD = 7.310-4
1
2.Integer res. spin = k
lg(w/wD)
6
8
10
12
Ep , GeV
4. Coupling res.
spin = m  Qx , m  kp
lg(w/wD)
1
Ep , GeV
10
12
8
2
4
6
8
Ep , GeV
10
12
1
1
5
wD = 7.310-4
2
2
16
wD = 7.310-4
Yu. Filatov et al., Polarized Proton Beam Acceleration at Nuclotron with the use of the
Solenoid Siberian Snake, NICA-SPIN 2013, March 18- 19, 2013, Dubna
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Solenoid Siberian Snake in Nuclotron
Partial Siberian Snake
Full Siberian Snake
Total longitudinal field integral:
Total longitudinal field integral:
(B||L)max=
21 Tm
y
Emax=6 GeV
(B||L)max=10,5
Tm
(y 6.8)
is angle between polarization and vertical axis
y   / 2
 y  z / 2
Yu. Filatov et al., Polarized Proton Beam Acceleration at Nuclotron with the use of the
Solenoid Siberian Snake, NICA-SPIN 2013, March 18- 19, 2013, Dubna
4
The scheme of the solenoid coupling compensation
Installation Siberian Snake into two free spaces
1 ,  2 are angles between quadrupole normal and radial accelerator axis
ki  Gi / B, [m-2 ]
Gi  By / x is quadrupole gradient
-2
D
is the structural defocusing quadrupole kD  0,75 m 
LS, m
L1, m L2, m L, m
2,2

Ek, GeV B||, T
0,2
0,5
0,15
1
2
50
50
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
Yu. Filatov et al., Polarized Proton Beam Acceleration at Nuclotron with the use of the
Solenoid Siberian Snake, NICA-SPIN 2013, March 18- 19, 2013, Dubna
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Spin Matching of the Proton Polarization
The angle between polarization and
velocity at injection energy is equal to
Injection into
Nuclotron
1 
3
G
4
The angle between polarization and velocity
when transferring the beam from Nuclotron
into NICA Collider
4 

2
G
The angle between polarization and velocity
when transferring the beam from Nuclotron into
the Main Experimental Hall
5 
Extraction into
NICA Collider
Extraction into
the Main Experimental Hall

4
G
In the case of Partial Siberian Snake
the additional angle appears between
polarization and vertical axis which
equal to  y  z / 2
 y   / 4 (z   / 2)
Yu. Filatov et al., Polarized Proton Beam Acceleration at Nuclotron with the use of the
Solenoid Siberian Snake, NICA-SPIN 2013, March 18- 19, 2013, Dubna
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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
Solenoid Siberian Snake, NICA-SPIN 2013, March 18- 19, 2013, Dubna
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Thank you for your attention!
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