Funding for this research was provided by:
Ruprecht-Karls-Universität Heidelberg
Article History
Received: 5 July 2021
Revised: 24 August 2021
Accepted: 30 August 2021
First Online: 7 September 2021
Declarations
:
: J. H. Gross declares no potential conflicts of interest with respect to the research, authorship, and/or publication of this article. H. B. Linden is inventor of LIFDI and co-owner of Linden CMS, and M. H. Linden is employee of Linden CMS which manufactures and sells LIFDI ion sources and emitters.