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Fukuda, Yuji
no journal, ,
CR-39 detectors are widely used in the studies of laser-driven particle acceleration experiments. However, the CR-39 cannot detect fast ions with energies beyond its stopping power. A stack of CR-39 or a method utilizing backscattered particles are developed to detect high energy ions. Moreover, vacuum effects on CR-39 makes it difficult to identify ion energies and ion species. We will introduce applications and challenges of CR-39 detectors in laser-driven particle acceleration experiments in JAEA-KPSI.
Sakaki, Hironao
no journal, ,
This presentation shows status reports of large particle accelerators in Japan. And also, it reports the beam control technologies at some facilities.
Kanasaki, Masato; Sakaki, Hironao; Fukuda, Yuji; Yogo, Akifumi; Jinno, Satoshi; Nishiuchi, Mamiko; Ogura, Koichi; Kondo, Kiminori; Oda, Keiji*; Yamauchi, Tomoya*
no journal, ,
Recently, CR-39 track detectors have been extensively used in laser-driven ion acceleration experiments, because the CR-39 have a great advantage that they are insensitive to high energy photons and electrons and capable of detecting only ions. However, it is required that the real-time diagnosis systems for laser accelerated ions to increase the experimental efficiency with using high repetition Laser. We have demonstrated that the online measurement of laser accelerated ions with several-tens MeV by real-time Thomson parabola system, which are calibrated by CR-39, with thin luminescent single bunch profile monitor.
Fukuda, Yuji; Sakaki, Hironao; Kanasaki, Masato; Yogo, Akifumi; Jinno, Satoshi; Tampo, Motonobu; Faenov, A.*; Pikuz, T.; Hayashi, Yukio; Kando, Masaki; et al.
no journal, ,
A new diagnosis method for high energy ions utilizing a single CR-39 detector mounted on plastic plates is demonstrated to identify the presence of the high energy component beyond the CR-39's detection threshold limit. This ion detection method is applied to laser-driven ion acceleration experiments using cluster-gas targets, and ion signals with energies up to 50 MeV per nucleon are identified.