Application of bulk high-T_Csuperconductors to electron beam ion sources: present status and outlook

Abstract

View the article online for updates and enhancements. Abstract. We have developed an electron beam ion source (EBIS) assembling three rings made of high-T C superconductor as a solenoid, which enables us to construct a "table-top" EBIS operated at the liquid N 2 temperature with a strong magnetic field. Optimizing a pulse field magnetization procedure, the assembly yielded a magnetic field as high as 0.8 T under a persistent mode, which stably lasted more than two days. An electron beam of 12 keV -50 mA was successfully compressed and guided by the magnetic field along the axis of the drift tube and "soft-landed" on an electron collector with a collection efficiency of more than 99 %. As a result, highly charged ions such as Ar 17+ and Xe 42+ have been produced and extracted.

Production of highly charged argon ions from a room temperature electron beam ion trap

“…Magnets are used to compress the electron beam up to the densities in the order of 1×10 3 Acm −2 to increase j e . For the cryogenic EBIS/T the high magnetic compression field is produced by the superconducting magnets which need liquid helium or ni-trogen for cooling [3][4][5][6] . Such systems are very complex and the operation costs to maintain the devices are expensive.…”