Higurashi Y, Ohnishi J, Nakagawa T, Haba H, Tamura M, Aihara T, Fujimaki M, Komiyama M, Uchiyama A, Kamigaito O
RIKEN Nishina Center, 2-1 Hirosawa, Wako-shi, Saitama 351-0198, Japan.
Rev Sci Instrum. 2012 Feb;83(2):02A333. doi: 10.1063/1.3671743.
A highly charged uranium (U) ion beam is produced from the RIKEN superconducting electron cyclotron resonance ion source using 18 and 28 GHz microwaves. The sputtering method is used to produce this U ion beam. The beam intensity is strongly dependent on the rod position and sputtering voltage. We observe that the emittance of U(35+) for 28 GHz microwaves is almost the same as that for 18 GHz microwaves. It seems that the beam intensity of U ions produced using 28 GHz microwaves is higher than that produced using 18 GHz microwaves at the same Radio Frequency (RF) power.
利用18GHz和28GHz微波，从日本理化学研究所的超导电子回旋共振离子源产生高电荷铀（U）离子束。采用溅射法产生这种铀离子束。束流强度强烈依赖于靶杆位置和溅射电压。我们观察到，28GHz微波下U(35+)的发射度与18GHz微波下的几乎相同。在相同射频（RF）功率下，使用28GHz微波产生的铀离子束流强度似乎高于使用18GHz微波产生的束流强度。
