Proton-excited soft x-ray analyzer having a rotatable target for selectively directing the x-rays to different detectors

Claim 1

APPARATUS FOR ANALYZING THE CHEMICAL COMPOSITION OF A SAMPLE OF MATERIAL CONTAINING A LOW-ATOMIC-NUMBER ELEMENT, COMPRISING: (A) A VACUUM CHAMBER; (B) A SOURCE OF PROTONS IN SAID CHAMBER; (C) A TARGET HAVING A HOLDER FOR SAID SAMPLE WITHIN SAID CHAMBER; (D) MEANS IN THE CHAMBER FOR ACCELERATING THE PROTONS TO IMPINGE UPON THE TARGET SAMPLE; (E) A MONOCHROMATOR LOCATED IN SAID CHAMBER AND POSITIONED TO RECEIVE X-RAYS EMITTED BY THE TARGET SAMPLE; (F) AND X-RAY DETECTOR MEANS LOCATED IN SAID CHAMBER AND POSITIONED TO RECEIVE AND MEASURE MONOCHROMATIC X-RAYS PASSING THROUGH THE MONOCHROMATOR; (G) STANDARD X-RAY DETECTOR MEANS DISPOSED IN SAID CHAMBER ADJACENT THE TARGET; (H) TARGET SUPPORT MEANS DISPOSED IN SAID CHAMBER AND HAVING MEANS EXTENDING OUTSIDE SAID CHAMBER FOR ROTATING SAID TARGET; AND (I) SAID ROTATING MEANS SELECTIVELY DIRECTING X-RAYS TO SAID STANDARD DETECTOR MEANS AND TO SAID MONOCHROMATOR.