RecruitingRadiation therapyStereotactic Body Radiation and Tumor Treating Fields for Locally Advanced Pancreas CancerThe purpose of this clinical trial is to determine whether using chemotherapy followed by stereotactic ablative body radiation therapy (SABR) and tumor treating fields (TTF) will slow tumor growth in people with locally advanced pancreas cancer. All participants will receive SABR therapy once per day for five days and use the TTF system for at least 18 hours per day starting on the first day of SABR until the tumor progresses or severe toxicity develops.