There are a few institutes in Israel that offer master programs in sciences, among them: The Weizmann Institute, The Technion, The Hebrew University of Jerusalem and The Ben Gurion University of the Negev. If you're looking for something thatis near Tel Aviv the best place for you will be The Weizmann Institute in Rehovot and in order to get more information about the different scholarships they offer international students you must contact the directly.
I've attached a link at the end of my message that provides more information about the different programs and institutes that offer them.