Highly efficient isotope separation and ion implantation of 163Ho for the ECHo project
Abstract
The effective electron neutrino mass measurement at the ECHo experiment requires high purity 163Ho, which is ion implanted into detector absorbers. To meet the project specifications in efficiency and purity, the entire process chain of ionization, isotope separation, and implantation of 163Ho was optimized. A new two-step resonant laser ionization scheme was established at the 30\, kV magnetic mass separator RISIKO. This achieved ionization and separation efficiencies with an average of 69(5)stat(4)sys\,\% using intra-cavity frequency doubled Ti:sapphire lasers. The implantation of a 166mHo impurity is suppressed about five orders of magnitude by the mass separation. A dedicated implantation stage with focusing and scanning capability enhances the geometric implantation efficiency into the ECHo detectors to 20(2)\,\%.
Turn this paper into a lesson
ArcXiv compiles a structured reading guide from this paper's metadata: plain-English importance, contributions, prerequisite concepts, which sections to read first, flashcards, and a quiz. Grounded in the abstract, never invented.