Speaker
K. Kondo
(Research Laboratory for Nuclear Rectors)
Description
K. Kondo, T. Moriyama (1); J. Hasegawa, K. Horioka (2); and Y. Oguri(1)
(1) Research Laboratory for Nuclear Rectors, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8550 JAPAN
(2) Department of Energy Sciences, Tokyo Institute of Technology
4259 Nagatsuta-cho, Midori-ku, Yokohama 226-8502 JAPAN
For ion-driven warm dense matter experiments and heavy ion fusion target design, the stopping power is an important issue. Stopping power depends on the chemical state of target material. Very few studies have been published for change of stopping power due to chemical effects[1]. Therefore, it is of interest to experi-mentally examine the change of stopping power of hydrogen due to transition from molecular state to dissociated atoms.
Electro-magnetic pulse device with 15 kV discharge voltage and with 1kPa initial molecular hydrogen gas pressure generated shock wave[2]. The shock speed was estimated as 30 km/s by shadowgraph method. Behind the shock front, there was dissociated hydrogen gas region without ionization which was suitable for the stopping power measurement. However, the previous experiments show that target durations as long as some microseconds is required for synchronization with ion beams. For this improvement, optimization of new electrode configuration is under way. We will discuss the dissociated hydrogen gas property obtained with the new device for the stopping power measurement considering the measured shock speed.
References
[1] D. Semrad, Phys. Rev. A, 58, 5008 (1998).
[2] J. Hasegawa, et al., Nucl. Instrum. and Methods A, 606, 205-211 (2009).
Primary author
K. Kondo
(Research Laboratory for Nuclear Rectors)
