This paper presents direct experimental observations of potentia1 profiles of a toroida1 helical plasma in the Compact Helical System, using a 200keV heavy ion beam probe. Electron cyclotron heated plasmas show a positive potential profile in a low density regime (bar{n}_e = 3 x 10^12 cm^-3), while neutral beam injection heated plasmas (bar{n}_e = 8 x 10^12 cm^-3) exhibit a negative potential profile. A loss cone structure evaluated from the observed potential is discussed to understand the behavior of high energy particle in a toroidal helical plasma
A heavy ion beam probe (HIBP) using a 3 MV tandem accelerator was installed in Large Helical Device ...
The heliotron/torsatron devices are regarded as an attractive candidate for a fusion reactor because...
"The confinement property of high energy ions and the role of ripple induced transport have been stu...
In this paper we present space potential profiles directly observed in a toroidal helical plasma of ...
In the Compact Helical System (CHS), electrostatic potential profiles in steady states and transient...
Static and dynamic behaviors of core plasma potentials in toroidal helical plasmas have been stu-die...
Bifurcation nature of potential profile of a toroidal helical plasma is investigated in the Compact ...
A 200keV heavy ion beam probe (HIBP) on the Compact Helical System torsatron/heliotron uses a newly ...
This work introduces heavy ion beam probe diagnostics and presents an overview of its applications. ...
Precise measurements of edge density profiles in various discharges have been performed successfully...
Density and potential fluctuations are simultaneously measured, using a heavy ion beam probe, in ele...
Beam ion loss from the Compact Helical System (CHS) has been measured with a scintillator-type probe...
The formation of an edge transport barrier (ETB) has recently been found in the Compact He-lical Sys...
In charge exchange spectroscopy (CXS), a simultaneous observation in different plasma toroidal cross...
The potential in the plasma core of the Large Helical Device (LHD) was measured with the 6 MeV Heavy...
A heavy ion beam probe (HIBP) using a 3 MV tandem accelerator was installed in Large Helical Device ...
The heliotron/torsatron devices are regarded as an attractive candidate for a fusion reactor because...
"The confinement property of high energy ions and the role of ripple induced transport have been stu...
In this paper we present space potential profiles directly observed in a toroidal helical plasma of ...
In the Compact Helical System (CHS), electrostatic potential profiles in steady states and transient...
Static and dynamic behaviors of core plasma potentials in toroidal helical plasmas have been stu-die...
Bifurcation nature of potential profile of a toroidal helical plasma is investigated in the Compact ...
A 200keV heavy ion beam probe (HIBP) on the Compact Helical System torsatron/heliotron uses a newly ...
This work introduces heavy ion beam probe diagnostics and presents an overview of its applications. ...
Precise measurements of edge density profiles in various discharges have been performed successfully...
Density and potential fluctuations are simultaneously measured, using a heavy ion beam probe, in ele...
Beam ion loss from the Compact Helical System (CHS) has been measured with a scintillator-type probe...
The formation of an edge transport barrier (ETB) has recently been found in the Compact He-lical Sys...
In charge exchange spectroscopy (CXS), a simultaneous observation in different plasma toroidal cross...
The potential in the plasma core of the Large Helical Device (LHD) was measured with the 6 MeV Heavy...
A heavy ion beam probe (HIBP) using a 3 MV tandem accelerator was installed in Large Helical Device ...
The heliotron/torsatron devices are regarded as an attractive candidate for a fusion reactor because...
"The confinement property of high energy ions and the role of ripple induced transport have been stu...