Abstract
A possibility of electron density measurements with heavy ion beam probes (HIBPs) has been demonstrated, along with their capability to measure the potential and magnetic field. A method has been proposed to reconstruct the electron density profile [A. Fujisawa et al., Rev. Sci. Instrum. 74, 3335 (2003)]. In the method, the profile of secondary beam currents is converted into a local density profile by taking into account local brightness and so-called path integral effects which mean the effect of beam attenuation along the beam orbit. Here the article presents the HIBP measurement of the electron density profile after the proposed method was first applied on the real experimental data of compact helical system plasmas. In the real application, the hollow density and the peaked profiles are successfully obtained with sufficiently high temporal resolution (a few ms), in accordance with the electron density profile measured with Thomson scattering for electron cyclotron resonance heating and neutral beam injection plasmas.
| Original language | English |
|---|---|
| Article number | 113507 |
| Journal | Review of Scientific Instruments |
| Volume | 89 |
| Issue number | 11 |
| DOIs | |
| Publication status | Published - Nov 1 2018 |
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All Science Journal Classification (ASJC) codes
- Instrumentation
Cite this
Density profile measurement with a heavy ion beam probe in a toroidal plasma of the compact helical system. / Shimizu, A.; fujisawa, akihide; Ohshima, S.; Nakano, H.; Minami, T.; Isobe, M.; Okamura, S.; Matsuoka, K.
In: Review of Scientific Instruments, Vol. 89, No. 11, 113507, 01.11.2018.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Density profile measurement with a heavy ion beam probe in a toroidal plasma of the compact helical system
AU - Shimizu, A.
AU - fujisawa, akihide
AU - Ohshima, S.
AU - Nakano, H.
AU - Minami, T.
AU - Isobe, M.
AU - Okamura, S.
AU - Matsuoka, K.
PY - 2018/11/1
Y1 - 2018/11/1
N2 - A possibility of electron density measurements with heavy ion beam probes (HIBPs) has been demonstrated, along with their capability to measure the potential and magnetic field. A method has been proposed to reconstruct the electron density profile [A. Fujisawa et al., Rev. Sci. Instrum. 74, 3335 (2003)]. In the method, the profile of secondary beam currents is converted into a local density profile by taking into account local brightness and so-called path integral effects which mean the effect of beam attenuation along the beam orbit. Here the article presents the HIBP measurement of the electron density profile after the proposed method was first applied on the real experimental data of compact helical system plasmas. In the real application, the hollow density and the peaked profiles are successfully obtained with sufficiently high temporal resolution (a few ms), in accordance with the electron density profile measured with Thomson scattering for electron cyclotron resonance heating and neutral beam injection plasmas.
AB - A possibility of electron density measurements with heavy ion beam probes (HIBPs) has been demonstrated, along with their capability to measure the potential and magnetic field. A method has been proposed to reconstruct the electron density profile [A. Fujisawa et al., Rev. Sci. Instrum. 74, 3335 (2003)]. In the method, the profile of secondary beam currents is converted into a local density profile by taking into account local brightness and so-called path integral effects which mean the effect of beam attenuation along the beam orbit. Here the article presents the HIBP measurement of the electron density profile after the proposed method was first applied on the real experimental data of compact helical system plasmas. In the real application, the hollow density and the peaked profiles are successfully obtained with sufficiently high temporal resolution (a few ms), in accordance with the electron density profile measured with Thomson scattering for electron cyclotron resonance heating and neutral beam injection plasmas.
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U2 - 10.1063/1.5039571
DO - 10.1063/1.5039571
M3 - Article
VL - 89
JO - Review of Scientific Instruments
JF - Review of Scientific Instruments
SN - 0034-6748
IS - 11
M1 - 113507
ER -