Speaker
Dr
Hironori Kuboki
(J-PARC Center, High Energy Accelerator Research Organization (KEK))
Description
Recently, simulation studies for U beam acceleration at J-PARC has been in progress
aiming to provide the world's highest intensity U beam [1, 2].
A planned new booster synchrotron would realize multi charge acceleration
applying a charge stripping injection technique.
Charge stripping section is installed at the booster injection
and U beams are injected and stripped simultaneously
enhancing their charge states from U30+-U35+ to around U60+ [3].
The U charge states are distributed after the charge stripper
according to the charge distribution determined by the stripper material and the ion velocity.
The distribution width is very important and should be as narrow as possible
because the beams with the charge states beyond the acceptance
lead to beam loss in the booster during acceleration.
In general, distribution widths would be narrower in carbon foil (solid)
than in gases [4],
however, we are afraid that foil strippers could withstand heat load
by the high intensity beam irradiation.
In this study, we investigate the possibility to deal with heat deposition by the high intensity U beam
in the cases of applying flowing liquid as well as solid foil strippers.
References
[1] P.K. Saha, H. Harada, M. Kinsho, M. Yamamoto, and H. Sako, "First Simulation Results of Heavy-Ion Acceleration in the RCS of J-PARC", Proceedings of HIAT'15, (2015), TUM2CO2, pp. 127-129.
[2] H. Harada et al., to be published.
[3] H. Kuboki et al., "Investigation of Charge Stripping Scheme for Uranium Ions at 1--20 MeV/nucleon", AIP Conference Proceedings 1962, (2018) 030006.
[4] H. Kuboki et al., "Charge-state distribution of 238U in nitrogen gas and carbon foil at 14 and 15 MeV/nucleon", Phys. Rev. Accel. Beams 14, (2011) 053502.
Primary author
Dr
Hironori Kuboki
(J-PARC Center, High Energy Accelerator Research Organization (KEK))
Co-authors
Dr
Hiroyuki Harada
(J-PARC Center, Japan Atomic Energy Agency (JAEA))
Dr
Pranab Saha
(J-PARC)