Intense heavy ion beam-induced temperature effects in carbon-based stripper foils
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At the future FAIR facility, reliably working solid carbon stripper foils are desired for providing intermediate charge states to SIS18. With the expected high beam intensities, the foils experience enhanced degradation and limited lifetime due to severe radiation damage, stress waves, and thermal effects. This work presents systematic measurements of the temperature of different carbon-based stripper foils (amorphous, diamond-like, and carbon-nanotube based) exposed to 4.8 MeV/u U, Bi, and Au beams of different pulse intensities. Thermal and spectroscopic analyses were performed by means of infrared thermography and Fourier transform infrared spectroscopy. The resulting temperature depends on the foil thickness and strongly increases with increasing pulse intensity and repetition rate.
KeywordsCarbon stripper foils High-power accelerators Heavy ion beam High-current operation Temperature measurement Infrared thermography
The authors would like to thank Dr. R. Danjoux (FLIR Systems Inc.) for valuable discussions. Katharina Kupka gratefully acknowledges support by BMBF (contract No. 05P12RDRBL) and HGS-HIRe Graduate School.
- 1.Barth W, Clemente G, Dahl L, Gerhard P, Groening L, Lommel B, Kaiser M S, Maier M, Mickat S, Vinzenz W (2010) High current design U40+-operation in the GSI-UNILAC. In: Proceedings of the 25th linear accelerator conference, MOP044, 154–156Google Scholar
- 3.Schlitt B, Vormann H, Barth W, Clemente G, Groening L, Kaiser M S, Lommel B, Maier M, Mickat S, Steiner J (2013) Charge stripping tests of high current uranium ion beams with methane and hydrogen gas strippers and carbon foils at the GSI UNILAC. In: Proceedings of the 4th international particle accelerator conference, THPWO010, 3379–3781Google Scholar
- 9.Marti F (2012) Heavy ion strippers. In: Proceedings of the 26th linear accelerator conference, FR1A01, 1050–1054Google Scholar
- 10.Marti F, Hershcovitch A, Momozaki Y, Nolen J, Reed C, Thieberger P (2010) Development of stripper options for FRIB. In: Proceedings of the 25th linear accelerator conference, TUP106, 662–664Google Scholar
- 11.Marti F, Hitchcock S, Miller P, Stetson JW, Yurkon J (2010) Stripper foil developments at NSCL/MSU, Proceedings of the 19th international conference on cyclotrons and their applications, THM2CCO03: 373–375Google Scholar
- 13.Ziegler JF, Biersack JP, Littmark U (1985) The stopping and range of ions in solids, vol 1. Pergamon Press, New YorkGoogle Scholar
- 15.Danjoux R (2015) Window or External Optics Transmittance. Technical Publication 60. A817 T560472itc INFRARED TRAINING CENTER. http://support.flir.com/Answers/A817T/A817-T560472_A-en-US%20Technical%20publication%2060%20Window%20or%20External%20Optics%20Transmittance.pdf Accessed 03 Jan 2015
- 19.Lambert JH, Anding E (1892) Lamberts Photometrie: [Photometria, sive De mensura et gradibus luminis, colorum et umbrae]. W. Engelmann, LeipzigGoogle Scholar