Ion bombardment camera for crystal orientation determination

Claim 1

AN ION BOMBARDMENT CAMERA FOR THE DETERMINATION OF CRYSTAL LATTICE ORIENTATION BY THE BOMBARDMENT OF THE CRYSTALLINE SAMPLE WITH IONS TO CAUSE THE EJECTION OF ATOMS FROM THE CRYSTAL IN KNOWN CRYSTALLOGRAPHIC DIRECTIONS DUE TO THE MOMENTUM TRANSFER BETWEEN ATOMS ALONG CERTAIN DIRECTIONS IN THE CRYSTAL LATTICE, WHICH CAMERA COMPRISES A BODY HAVING A CHAMBER THEREIN, AN ION SOURCE OF GLOW DISCHARGE TYPE FOR PRODUCING AN ION BEAM INCLUDING AN ANODE MOUNTED IN SAID BODY, SAID BODY HAVING AN INERT GAS PASSAGE LEADING TO SAID ANODE, A CATHODE DISC MOUNTED IN SAID CHAMBER IN ALIGNMENT WITH THE AXIS OF THE ION BEAM, SAID ANODE AND SAID CATHODE DISC HAVING CONFRONTING FACES, A CRYSTALLINE SPECIMEN HOLDER IN SAID CHAMBER TILTABLY MOUNTED IN SAID BODY ABOUT AN AXIS NORMAL TO AND INTERSECTING THE AXIS OF THE ION BEAM AND HAVING A SPECIMEN RECEIVING RECESS, A SPECIMEN SUPPORT CARRIED BY SAID HOLDER, A COLLECTOR ON WHICH THE EJECTED SPECIMEN ATOMS ARE DEPOSITED BEING REMOVABLY MOUNTED ON SAID HOLDER AND LOCATED BETWEEN SAID CATHODE DISC AND SAID SPECIMEN RECESS, MEANS CONNECTING SAID ANODE TO A SOURCE OF ELECTRICAL ENERGY, A CONDUCTOR ELECTRICALLY CONNECTING SAID CATHODE DISC AND SAID SPECIMEN SUPPORT WHEREBY SAID CATHODE DISC AND SPECIMEN SUPPORT ARE AT THE SAME POTENTIAL, SAID CATHODE DISC AND SAID COLLECTOR EACH HAVING AN OPENING THEREIN IN ALIGNMENT WITH THE AXIS OF THE ION BEAM TO PROVIDE AN UNINTERRUPTED PATH FOR ION BOMBARDMENT FROM SAID ANODE TO SAID SPECIMEN RECESS, AND MEANS FOR CONNECTING SAID CHAMBER TO A VACUUM SYSTEM.