4-twist helix snake to maintain polarization in multi-GeV proton rings

F. Antoulinakis; Y. Chen; A. Dutton; E. Rossi De La Fuente; S. Haupert; E. A. Ljungman; P. D. Myers; J. K. Thompson; A. Tai; C. A. Aidala; E. D. Courant; A. D. Krisch; M. A. Leonova; W. Lorenzon; R. S. Raymond; D. W. Sivers; V. K. Wong; T. Yang; Y. S. Derbenev; V. S. Morozov; A. M. Kondratenko

doi:10.1103/PhysRevAccelBeams.20.091003

4-twist helix snake to maintain polarization in multi-GeV proton rings

F. Antoulinakis
, Y. Chen
, A. Dutton
, E. Rossi De La Fuente
, S. Haupert
, E. A. Ljungman
, P. D. Myers
, J. K. Thompson
, A. Tai
, C. A. Aidala
, E. D. Courant
, A. D. Krisch
, M. A. Leonova
, W. Lorenzon
, R. S. Raymond
, D. W. Sivers
, V. K. Wong
, T. Yang
, Y. S. Derbenev
, V. S. Morozov

A. M. Kondratenko

Research output: Contribution to journal › Article › peer-review

3 Scopus citations

Abstract

Solenoid Siberian snakes have successfully maintained polarization in particle rings below 1 GeV, but never in multi-GeV rings, because the spin rotation by a solenoid is inversely proportional to the beam momentum. High energy rings, such as Brookhaven's 255 GeV Relativistic Heavy Ion Collider (RHIC), use only odd multiples of pairs of transverse B-field Siberian snakes directly opposite each other. When it became impractical to use a pair of Siberian Snakes in Fermilab's 120 GeV/c Main Injector, we searched for a new type of single Siberian snake that could overcome all depolarizing resonances in the 8.9-120 GeV/c range. We found that a snake made of one 4-twist helix and 2 dipoles could maintain the polarization. This snake design could solve the long-standing problem of significant polarization loss during acceleration of polarized protons from a few GeV to tens of GeV, such as in the AGS, before injecting them into multi-hundred GeV rings, such as RHIC.

Original language	English
Article number	091003
Journal	Physical Review Accelerators and Beams
Volume	20
Issue number	9
DOIs	https://doi.org/10.1103/PhysRevAccelBeams.20.091003
State	Published - Sep 27 2017
Externally published	Yes

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Antoulinakis, F., Chen, Y., Dutton, A., Rossi De La Fuente, E., Haupert, S., Ljungman, E. A., Myers, P. D., Thompson, J. K., Tai, A., Aidala, C. A., Courant, E. D., Krisch, A. D., Leonova, M. A., Lorenzon, W., Raymond, R. S., Sivers, D. W., Wong, V. K., Yang, T., Derbenev, Y. S., ... Kondratenko, A. M. (2017). 4-twist helix snake to maintain polarization in multi-GeV proton rings. Physical Review Accelerators and Beams, 20(9), Article 091003. https://doi.org/10.1103/PhysRevAccelBeams.20.091003

@article{3ffbbb48ced74e31bd7ab7c907cb50e7,

title = "4-twist helix snake to maintain polarization in multi-GeV proton rings",

abstract = "Solenoid Siberian snakes have successfully maintained polarization in particle rings below 1 GeV, but never in multi-GeV rings, because the spin rotation by a solenoid is inversely proportional to the beam momentum. High energy rings, such as Brookhaven's 255 GeV Relativistic Heavy Ion Collider (RHIC), use only odd multiples of pairs of transverse B-field Siberian snakes directly opposite each other. When it became impractical to use a pair of Siberian Snakes in Fermilab's 120 GeV/c Main Injector, we searched for a new type of single Siberian snake that could overcome all depolarizing resonances in the 8.9-120 GeV/c range. We found that a snake made of one 4-twist helix and 2 dipoles could maintain the polarization. This snake design could solve the long-standing problem of significant polarization loss during acceleration of polarized protons from a few GeV to tens of GeV, such as in the AGS, before injecting them into multi-hundred GeV rings, such as RHIC.",

author = "F. Antoulinakis and Y. Chen and A. Dutton and \{Rossi De La Fuente\}, E. and S. Haupert and Ljungman, \{E. A.\} and Myers, \{P. D.\} and Thompson, \{J. K.\} and A. Tai and Aidala, \{C. A.\} and Courant, \{E. D.\} and Krisch, \{A. D.\} and Leonova, \{M. A.\} and W. Lorenzon and Raymond, \{R. S.\} and Sivers, \{D. W.\} and Wong, \{V. K.\} and T. Yang and Derbenev, \{Y. S.\} and Morozov, \{V. S.\} and Kondratenko, \{A. M.\}",

note = "Publisher Copyright: {\textcopyright} 2017 authors. Published by the American Physical Society.",

year = "2017",

month = sep,

day = "27",

doi = "10.1103/PhysRevAccelBeams.20.091003",

language = "English",

volume = "20",

journal = "Physical Review Accelerators and Beams",

issn = "2469-9888",

publisher = "American Physical Society",

number = "9",

}

Antoulinakis, F, Chen, Y, Dutton, A, Rossi De La Fuente, E, Haupert, S, Ljungman, EA, Myers, PD, Thompson, JK, Tai, A, Aidala, CA, Courant, ED, Krisch, AD, Leonova, MA, Lorenzon, W, Raymond, RS, Sivers, DW, Wong, VK, Yang, T, Derbenev, YS, Morozov, VS & Kondratenko, AM 2017, '4-twist helix snake to maintain polarization in multi-GeV proton rings', Physical Review Accelerators and Beams, vol. 20, no. 9, 091003. https://doi.org/10.1103/PhysRevAccelBeams.20.091003

TY - JOUR

T1 - 4-twist helix snake to maintain polarization in multi-GeV proton rings

AU - Antoulinakis, F.

AU - Chen, Y.

AU - Dutton, A.

AU - Rossi De La Fuente, E.

AU - Haupert, S.

AU - Ljungman, E. A.

AU - Myers, P. D.

AU - Thompson, J. K.

AU - Tai, A.

AU - Aidala, C. A.

AU - Courant, E. D.

AU - Krisch, A. D.

AU - Leonova, M. A.

AU - Lorenzon, W.

AU - Raymond, R. S.

AU - Sivers, D. W.

AU - Wong, V. K.

AU - Yang, T.

AU - Derbenev, Y. S.

AU - Morozov, V. S.

AU - Kondratenko, A. M.

PY - 2017/9/27

Y1 - 2017/9/27

N2 - Solenoid Siberian snakes have successfully maintained polarization in particle rings below 1 GeV, but never in multi-GeV rings, because the spin rotation by a solenoid is inversely proportional to the beam momentum. High energy rings, such as Brookhaven's 255 GeV Relativistic Heavy Ion Collider (RHIC), use only odd multiples of pairs of transverse B-field Siberian snakes directly opposite each other. When it became impractical to use a pair of Siberian Snakes in Fermilab's 120 GeV/c Main Injector, we searched for a new type of single Siberian snake that could overcome all depolarizing resonances in the 8.9-120 GeV/c range. We found that a snake made of one 4-twist helix and 2 dipoles could maintain the polarization. This snake design could solve the long-standing problem of significant polarization loss during acceleration of polarized protons from a few GeV to tens of GeV, such as in the AGS, before injecting them into multi-hundred GeV rings, such as RHIC.

AB - Solenoid Siberian snakes have successfully maintained polarization in particle rings below 1 GeV, but never in multi-GeV rings, because the spin rotation by a solenoid is inversely proportional to the beam momentum. High energy rings, such as Brookhaven's 255 GeV Relativistic Heavy Ion Collider (RHIC), use only odd multiples of pairs of transverse B-field Siberian snakes directly opposite each other. When it became impractical to use a pair of Siberian Snakes in Fermilab's 120 GeV/c Main Injector, we searched for a new type of single Siberian snake that could overcome all depolarizing resonances in the 8.9-120 GeV/c range. We found that a snake made of one 4-twist helix and 2 dipoles could maintain the polarization. This snake design could solve the long-standing problem of significant polarization loss during acceleration of polarized protons from a few GeV to tens of GeV, such as in the AGS, before injecting them into multi-hundred GeV rings, such as RHIC.

UR - https://www.scopus.com/pages/publications/85030327894

U2 - 10.1103/PhysRevAccelBeams.20.091003

DO - 10.1103/PhysRevAccelBeams.20.091003

M3 - Article

AN - SCOPUS:85030327894

SN - 2469-9888

VL - 20

JO - Physical Review Accelerators and Beams

JF - Physical Review Accelerators and Beams

IS - 9

M1 - 091003

ER -

4-twist helix snake to maintain polarization in multi-GeV proton rings

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