A left-handed helical snake for the HSR

The Electron Ion Collider calls for polarized proton and helion beams on polarized electron beam collisions. To preserve polarization of polarized hadron beams, six full helical snakes will be installed. As there are currently 4 snakes in RHIC, the remaining two snakes will be made from existing rotator magnet coils. The rotator magnets are made from both right handed and left handed helicities. In order for a sufficient stock of spare coils, one snake will be made of left handed coils. Simulations using zgoubi show the left handed snake has sufficient range to provide the desired snake precession axes for helions and protons with the existing power supplies.

proton
polarization
dipole
electron
electronics
collider

References(5)

Figures(0)

[1]

RHIC optics and spin dynamics with snakes and rotators

et al.

- Phys.Rev.Accel.Beams 25 (2022) 12, 121002
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DOI:
- 10.1103/PhysRevAccelBeams.25.121002

[2]

Polarized Beam Dynamics and Instrumentation in Particle Accelerators: USPAS Summer 2021 Spin Class Lectures

•
DOI:
- 10.1007/978-3-031-16715-7

[3]

Zgoubi User’s Guide

F. Meot

[4]

Simulations of polarized helions in the HSR

- JACoW IPAC2024 (2024) TUPS05
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DOI:
- 10.18429/JACoW-IPAC2024-TUPS05

[5]

Spin dynamics and snakes in synchrotrons

S.Y. Lee