Document Type

Conference Paper

Publication Date




Publication Title

Proceedings of the 10th International Particle Accelerator Conference



Conference Name

10th International Particle Accelerator Conference, 19-24 May 2019, Melbourne Australia


High electron and ion polarizations are some of the key design requirements of a future Electron Ion Collider (EIC). The transparent spin mode, a concept inspired by the figure 8 ring design of JLEIC, is a novel technique for preservation and control of electron and ion spin polarizations in a collider or storage ring. It makes the ring lattice "invisible" to the spin and allows for polarization control by small quasi-static magnetic fields with practically no effect on the beam’s orbital characteristics. It offers unique opportunities for polarization maintenance and control in Jefferson Lab’s JLEIC and in BNL’s eRHIC. The transparent spin mode has been demonstrated in simulations and we now plan to test it experimentally. We present a design of an experiment using a polarized proton beam stored in one of the RHIC rings. In the experiment, one of the RHIC rings is configured in the transparent spin mode by aligning the axes of its two Siberian snakes. The experiment goals, procedures, hardware requirements and expected results are presented.


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Original Publication Citation

Morozov, V. S., Adams, P., Derbenev, Y. S., Filatov, Y., Huang, H., Kondratenko, A. M., Kondratenko, M. A., Lin, F., Meot, F., Ptitsyn, V., Schmidke, W. B., & Zhang, Y. (2019). Experimental verification of transparent spin mode in RHIC. In M. Boland, H. Tanaka, D. Button, R. Dowd, V. R.W. Schaa, & E. Tan (Eds.) Proceedings of the 10th International Particle Accelerator Conference (pp. 2783-2786). JACoW.