Real-Time Measurement of Ion Energies for Heavy Ions

Abstract:

A real-time position detection system is developed for measuring heavy ions with low fluence and energy of several hundred MeV, which are generated from an azimuthally varying field (AVF) cyclotron accelerator. We investigate the photoluminescence of α-Al₂O₃ single crystals implanted with Eu (Al₂O₃:Eu), which is used in the detection system. The Al₂O₃:Eu scintillators with a fluence of 3.0 × 10¹⁶ cm⁻² are annealed at 500–900°C. The annealing conditions required for the Al₂O₃:Eu scintillators to obtain the maximum luminescence are 0.5 h at 600°C. The scintillator is placed on the AVF cyclotron target stage under atmospheric pressure and is irradiated by 260-MeV Ne. An inverted confocal microscope with a ×10 objective lens is positioned behind the Al₂O₃:Eu scintillator, and the luminescent images during ion irradiation are obtained by a position-sensitive camera unit with a 512 × 512 pixel electron multiplying charge-coupled device. The images indicate that our online measurement system has a sufficient spatial resolution, since the luminous diameter induced by irradiation with 190 ions /s is almost the same as that of the microbeam.

• Periodical: Key Engineering Materials (Volume 698)
• Pages: 157-162
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.698.157
• Online since: July 2016
• Authors: Akihito Yokoyama*, Wataru Kada, Takahiro Satoh, Masashi Koka, Yuya Yokota, Makoto Sakai, Kenta Miura, Osamu Hanaizumi
• Keywords: Al₂O₃:Eu, Heavy Ion Microbeam, Ion Luminescence, Photoluminescence, Single-Ion Hit

References

[1] M. Cholewa, B.E. Fischer, M. Heiß: Nucl. Instr. and Meth. B Vol. 210 (2003), p.296.

[2] O. Veselov, W. Polak, R. Ugenskiene, K. Lebed, J. Lekki, Z. Stachura and J. Styczen: Radiat Prot Dosimetry Vol. 122 (2006), p.316.

DOI: 10.1093/rpd/ncl437

[3] T. Funayama, S. Wada, Y. Yokota, K. Fukamoto, T. Sakashita, M. Taguchi, T. Kakizaki, N. Hamada, M. Suzuki, Y. Furusawa, H. Watanabe, K. Kiguchi and Y. Kobayashi: J. Radiat. Res. (Tokyo) Vol. 49 (2008), p.71.

DOI: 10.1269/jrr.07085

[4] Y. Kobayashi, T. Funayama, S. Wada, M. Taguchi and H. Watanabe: Nucl. Instr. and Meth. B Vol. 210 (2003), p.308.

[5] T. Satoh, M. Koka, W. Kada, A. Yokoyama and T. Kamiya: Nucl. Instr. and Meth. B Vol. 332 (2014), p.242.

[6] A. Yokoyama, W. Kada, T. Satoh, M. Koka, S. Yamamoto, T. Kamiya and W. Yokota: Nucl. Instr. and Meth. B Vol. 332 (2014), p.334.

[7] N. Can, P.D. Townsend, D.E. Hole and C.N. Afonso: Applied Physics Letters Vol. 65 (1994), p.1871.

[8] K. Aono, M. Iwaki: Nucl. Instr. and Meth. B Vol. 141 (1998), p.518.

[9] S. Onoda, T. Yamamoto, T. Ohshima, J. Isoya, T. Teraji and K. Watanabe: Transactions of the Materials Research Society of Japan Vol. 37 (2012), p.241.

DOI: 10.14723/tmrsj.37.241

[10] K. Aono, H. Toida, K. Terashima and M. Iwaki: Nucl. Instr. and Meth. B Vol. 175 (2001), p.580.

[11] T. Kamiya, T. Suda, R. Tanaka: Nucl. Instr. and Meth. B Vol. 118 (1996), p.447.

[12] T. Kamiya, N. Utsunomiya, E. Minehara, R. Tanaka and I. Ohdomari: Nucl. Instr. and Meth. B Vol. 64 (1992), p.362.

[13] M. Oikawa, T. Satoh, T. Sakai, N. Miyawaki, H. Kashiwagi, S. Kurashima, S. Okumura, M. Fukuda, W. Yokota and T. Kamiya: Nucl. Instr. and Meth. B Vol. 260 (2007), p.85.

[14] Frank Czerwinski et al, ISBN 978-953-51-0768-2, (2012). p.121.

[15] G. Bellocchi, G. Franzò, F. Iacona, S. Boninelli, M. Miritello, T. Cesca and F. Priolo: Opt. Express Vol. 20 (2012), p.5501.

DOI: 10.1364/oe.20.005501

[16] E. Lima, M.E. Villafuerte-Castrejón, J. Saniger, V. Lara, J.E. Sánchez-Sánchez and L. Javier Álvarez: Advances in Materials Science and Engineering Vol. 2012 (2012), p.7.

DOI: 10.1155/2012/238075