A study of KF3- attenuation in an RFQ gas cell for 41Ca AMS
- A study of KF3- attenuation in an RFQ gas cell for 41Ca AMS
- X.-L. Zhao; A.E. Litherland; 존일랴드스; Y.-C. Fu; W.E. Kieser
- Issue Date
- VOL 55, NO 2-3, 268-281
- Guided by simulations using SIMION 8.1, a series of modifications were made to an experimental version of an Isobar Separator for Anions (ISA). The resulting improved version of the ISA provides a means of re-energizing the ions after they are cooled by gas collisions as they pass through the gas-filled radiofrequency quadrupoles (RFQ), and also provides higher transmission efficiencies. Reinvestigation of the separation of CaF3 and KF3 with this refined apparatus
resulted in a better balance between isobar suppression and analyte transmission. KF3 was attenuated at eV energies by 4 orders of magnitude while 40% transmission of CaF3 was retained, for a 20keV CaF3 beam of 2mm and ±12mr. These results advance the possibility of an efficient small ISA-AMS system for both cosmogenic and medical applications of 41Ca.
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