Publisher's Note: CRISP: A compact RF ion source prototype for emittance scanner testing

This article was originally published online on March 16, 2020. The acronym SPIDER was defined incorrectly in the abstract. It was corrected as "Source for the Production on Ions of Deuterium Extracted from RF plasma." In addition, a correction was made to the second line of the first paragraph of the Introduction to read as "An Allison type emittance scanner1-3 is currently being developed for installation in SPIDER (Source for the Production of Ions of Deuterium Extracted from RF plasma)." AIP Publishing apologizes for these errors. All online versions of the article were corrected on May 19, 2020.