Fast radial scanning probe system on KTX

Deng, Tijian; Lan, Tao; Tan, Manqing

doi:10.1088/2058-6272/ab5b1a

Cited by 3 publications

(1 citation statement)

References 30 publications

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“…In fusion plasma research, magnetic probes are widely used for taking stationary and fluctuating magnetic field measurements, such as in DIII-D [1,2], Alcator C-Mod [3], NSTX-U [4], JET [5], ASDEX Upgrade [6,7], MAST [8], TCV [9], WEST [10], EAST [11,12], T-10 [13], HL-2A [14], J-TEXT [15,16], KTX [17], SUNIST [18,19], KSTAR [20], W7-X [21], LHD [22], and H-1NF [23], etc. The electrostatic probes are also frequently employed to provide the plasma potential, electron density and temperature and many other physical parameter measurements in the scape-off layer or divertor region [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

A new electromagnetic probe array diagnostic for analyzing electrostatic and magnetic fluctuations in EAST plasmas

Lan

Shi

Yan

et al. 2023

Plasma Sci. Technol.

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A novel electro-magnetic probe array (EMPA) diagnostic which consists of a magnetic probe array and an electrostatic probe array has been developed on EAST recently. The EMPA is fixed near the first wall at horizontal port P. The magnetic probe array of the EMPA consists of 24 same magnetic probes, and each of them can measure toroidal, poloidal and radial magnetic fluctuations simultaneously which provides additional toroidal magnetic fluctuation measurements comparing with the regular magnetic probes on EAST. With higher sampling rate of 2 MHz, the EMPA magnetic probes can provide higher frequency magnetic fluctuation measurements. The magnetic probe array of the EMPA is arranged by 2 parallel layers of magnetic probes with radial distance of 63 mm. And each layer of the magnetic probes is arranged in 4 poloidal rows and 3 toroidal columns. The compact arrangement of the EMPA magnetic probe array largely improve the toroidal mode number measurement ability from -8≤n≤8 to -112≤n≤112, and also improve the high poloidal wave number measurement ability of magnetic fluctuations comparing with the regular high frequency magnetic probes on EAST. The electrostatic probe array of the EMPA consists of 2 sets of four-tip probes and a single-tip probe array with 3 poloidal rows and 4 toroidal columns. It complements the electrostatic parameter measurements behind the main limiter and near the first wall in EAST. The engineering details of the EMPA diagnostic including the mechanical system, electrical system, acquisition and control system, and effective area calibration are presented. The preliminary applications of the EMPA in L-mode and H-mode discharges on EAST have demonstrated that the EMPA works well for providing the information of the magnetic and electrostatic fluctuations and can contribute to deeper physical analysis in future EAST experiments.

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Section: Introductionmentioning

confidence: 99%

A new electromagnetic probe array diagnostic for analyzing electrostatic and magnetic fluctuations in EAST plasmas

Lan

Shi

Yan

et al. 2023

Plasma Sci. Technol.

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Piezoelectric Linear Motors with Alternating Action for Motion Servo System of Probe Station

Huang,

Wang,

Cheng

et al. 2024

Actuators

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The development of a piezoelectric linear motor is presented in this paper, based on the principle of alternating motion, to meet the acting stroke and accuracy requirements for the probe station’s motion servo system. By partitioning the stator into tangential and normal components, two tangential actuators are affixed to the base, while two normal actuators are fixed on the preloading mechanism, thereby proposing a novel approach for connecting the stator and base. First, the construction and the working principle of the motor were introduced. Subsequently, the motor’s major components were designed through finite element simulation, followed by modeling the motor dynamics and deriving its displacement transfer function. Finally, an experimental prototype was fabricated, and a prototype test system was constructed. The driving method can realize a large stroke operation at a low frequency. The minimum operating frequency of the motor is 1 Hz, the minimum step is 12.55 μm, and the stroke is 105 mm. The study results will promote the development of high-performance probe systems.

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Longitudinal Composite-Mode Linear Ultrasonic Motor for Motion Servo System of Probe Station

et al. 2020

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In order to build a motion system with high resolution, fast response, and long travel range in a probe station, a linear ultrasonic motor was investigated as an alternative to the electromagnetic counterpart in a servo system. This work focused on a longitudinal composite-mode linear ultrasonic motor for the motion servo system in a probe station. The motor was designed based on the required specifications. A finite element model was built to analyze the dynamic response of the stator. The influence of the structural parameters on the dynamic performances, i.e., sensitivity parameters, was calculated to analyze the stability of the structure. Based on these analytical works, a prototype of the stator was developed and mode testing was conducted. The experimental results showed that the proposed design was able to achieve respectable performance: Despite the dual-mode design, the frequency difference between the two working modes was minimized to 608 Hz; and the prototype could operate stably under 55.4 kHz, providing a 0.5 N load with 980 mm/s speed.

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Fast radial scanning probe system on KTX

Cited by 3 publications

References 30 publications

A new electromagnetic probe array diagnostic for analyzing electrostatic and magnetic fluctuations in EAST plasmas

A new electromagnetic probe array diagnostic for analyzing electrostatic and magnetic fluctuations in EAST plasmas

Piezoelectric Linear Motors with Alternating Action for Motion Servo System of Probe Station

Longitudinal Composite-Mode Linear Ultrasonic Motor for Motion Servo System of Probe Station

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