RecruitingDrug trialPhase I Nab-Paclitaxel Plus Gemcitabine With Proton Therapy for Locally Advanced Pancreatic Cancer (LAPC)The purpose of this study is to determine the maximum tolerated dose of the chemotherapy drugs nab-paclitaxel and gemcitabine when combined with hypofractionated ablative proton therapy for the treatment of locally advanced pancreatic cancer. You will receive proton therapy once a day (Monday - Friday) for 3 weeks. Participants will also receive chemotherapy on each Monday of those three weeks.