Published January 2018
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Plasma density profile measurement during ELM suppression by RMP
Description
KSTAR plasma density profile is measured by using a frequency sweep reflectometer. The time resolution of KSTAR reflectometer is 25 μs. To obtain more precise density profile, the frequency sweep is perfectly linearized by modeling the VCO input circuit as an RC low pass filter and numerically solving the equation. Since the perfect linear frequency sweep makes the signal shape much simpler, the automatic data analysis becomes more feasible. The frequency linearization method is described in detail and the plasma density profiles measured during ELM suppression and mitigation by RMP are presented. (author)
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Additional details
Publishing Information
- Imprint Title
- Proceeding of A3 foresight program seminar on critical physics issues specific to steady state sustainment of high-performance plasmas 2016
- Imprint Pagination
- [200 p.]
- Journal Page Range
- p. 128-132
- Report number
- NIFS-PROC--108
Conference
- Title
- A3 foresight program seminar on critical physics issues specific to steady state sustainment of high-performance plasmas 2016
- Dates
- 22-25 Nov 2016
- Place
- Jeju (Korea, Republic of)
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 50040057
- Subject category
- S70: PLASMA PHYSICS AND FUSION TECHNOLOGY;
- Resource subtype / Literary indicator
- Conference
- Descriptors DEI
- DIGITIZERS; EDGE LOCALIZED MODES; ELECTRIC CURRENTS; FREQUENCY ANALYSIS; INTERFEROMETERS; PLASMA DENSITY; PLASMA TECHNOLOGY; PLASMA WAVES; RF SYSTEMS; SIGNAL CONDITIONING; SWEEP CIRCUITS; TOKAMAK DEVICES; TRANSDUCERS; WAVE FORMS
- Descriptors DEC
- CLOSED PLASMA DEVICES; CURRENTS; ELECTRONIC CIRCUITS; INSTABILITY; MEASURING INSTRUMENTS; PLASMA INSTABILITY; PLASMA MACROINSTABILITIES; PULSE CIRCUITS; SIGNAL CONDITIONERS; THERMONUCLEAR DEVICES
Optional Information
- Notes
- 3 refs., 4 figs.