2.3 Diagnostics for PMI Research
25
(a)
(b)
Fig. 2.7 Emission of molecular lines from TEXTOR edge plasma. Discharges of a pure H, b pure
D, and c H+D are compared (reprinted with permission from [7])
Although loaded power by radiation to PFS can be given by the integration of
intensities of the loaded radiation with wavelength, no single detector is available for
that. Hence, a bolometer or calorimeter is used to detect power load to PFS, which
requires some sensors or probes at locations to be observed.
It should be mentioned that although the radiation power from the plasma can be
detected by the bolometer, it is not easy to find what is the main radiator (impurity).
In some sense, this makes the understanding of PMI (or impurity release from PFS)
difficult.
Moreover, appropriated power load test to simulate damage of PFS by radiation
from burning plasma is not easy because radiation sources having equivalent energy
spectra to the burning plasma which is consisted of soft X-ray to VUV are hardly
available. Present power load tests are mostly done with power sources of ions,
electrons, and lasers.
25
(a)
(b)
Fig. 2.7 Emission of molecular lines from TEXTOR edge plasma. Discharges of a pure H, b pure
D, and c H+D are compared (reprinted with permission from [7])
Although loaded power by radiation to PFS can be given by the integration of
intensities of the loaded radiation with wavelength, no single detector is available for
that. Hence, a bolometer or calorimeter is used to detect power load to PFS, which
requires some sensors or probes at locations to be observed.
It should be mentioned that although the radiation power from the plasma can be
detected by the bolometer, it is not easy to find what is the main radiator (impurity).
In some sense, this makes the understanding of PMI (or impurity release from PFS)
difficult.
Moreover, appropriated power load test to simulate damage of PFS by radiation
from burning plasma is not easy because radiation sources having equivalent energy
spectra to the burning plasma which is consisted of soft X-ray to VUV are hardly
available. Present power load tests are mostly done with power sources of ions,
electrons, and lasers.