Author:
OGAWA M.,NEUNER U.,KOBAYASHI H.,NAKAJIMA Y.,NISHIGORI K.,TAKAYAMA K.,IWASE O.,YOSHIDA M.,KOJIMA M.,HASEGAWA J.,OGURI Y.,HORIOKA K.,NAKAJIMA M.,MIYAMOTO S.,DUBENKOV V.,MURAKAMI T.
Abstract
An energy loss of 240 MeV argon ions in a Z-pinch
helium plasma has been for the first time observed throughout
the entire pinching process. Standard Stark broadening
analysis gives an electron density ranging from 4 to 6
× 1017 cm−3 during the
pinch. To deduce stopping power from the energy loss, the
target thickness of the helium plasma has been evaluated
assuming the mean charge of helium based on thermal equilibrium.
The observed electron density and the mean charge of helium
give a target thickness of 30 ± 3 μg cm−2
from 1 μs to 1.8 μs after the discharge ignition.
The measured stopping power exceeds a tabulated value for
cold helium gas by a factor of 2 to 3 around the time of
the first pinch. The experimental stopping power is compared
with theoretical values calculated using an equation of
stopping power for a partially ionized plasma.
Subject
Electrical and Electronic Engineering,Condensed Matter Physics,Atomic and Molecular Physics, and Optics
Cited by
7 articles.
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