In March 2025, the EIC Polarized Ion Source (EPIOS) scientific consortium was formed. EPIOS has written a whitepaper published in June 2026 as a Perspective in Physical Review C where the science case is summarized.  Further, other essential elements to realize the science are the ePIC collaboration  and the Electron Ion Collider project.

Polarized ion beams are essential for some of the most important science questions addressed by EIC. To date, the accelerator and detector have received considerable attention and resources. It is timely to begin serious consideration of the polarized ion beams in the context of the scientific motivation, and the current accelerator and detector designs. The goal is to simulate a suite of the most important EIC measurements that use polarized ion beams employing realistic accelerator and ePIC detector characterizations. The proposed program will add real value to the EIC scientific enterprise. A primary purpose of the two-week program is to  attract young researchers into the EIC scientific endeavor.

Key goals for the program are:

1. To raise the visibility of EIC science with polarized ion beams
2. To attract the interest of young physicists to this science
3. To work out in detail a suite of the most important EIC measurements that use polarized ion beams. After the INT program, it is planned that these will be published.

The structure of the program is as follows:

Week 1: March 22 to 26, 2027

Week 2: March 29 to April 2, 2027

In the first week, we aim to identify the most compelling scientific opportunities through presentations by both theorists and experimentalists, followed by discussion. The program will also feature overview talks on the EIC accelerator, the ePIC detector, the current status of polarized ion source development, and advances in polarimetry. This foundation will build upon the findings of the Yellow Report. We plan to include the following topics:

• Spin Structure of the Nucleon
• 3D Partonic Structure of the Nucleon and Light Nuclei
• Modification of Spin Structure of Nucleon in the Nucleus
• Exotic Gluon States in the Nucleus
• Overview of EIC
• Overview of Polarized Ion Sources
• Overview of Polarimetry
• Overview of ePIC detector

At the end of the first week, there will be an overview presentation describing the highlights and the measurements to be studied in detail in the second week. The second week will be dedicated to identifying and developing the most important measurements to be pursued at the EIC. The attendees would break up into parallel working groups to work on simulation of these measurements. The organizing committee will prepare a core set of experimental priorities based on the EIC White Paper and Yellow Report, while remaining receptive to new, scientifically well-justified proposals. Activities will center on detailed and realistic simulations of the beam conditions, interaction region, and ePIC detector configuration. Key topics will include background characterization, polarimetry, and other instrumental considerations, with particular emphasis on the evaluation and mitigation of systematic uncertainties.

At the end of the second week, there will be an overview presentation describing the achievements of the different working groups in evaluating the selected measurements. It is planned that these evaluations be brought to completion after the INT program and be published.