Investigation of an extractor gauge modified by carbon nanotubes emitter grown on stainless steel substrate

Cheng, Yongjun; Zhang, Huzhong; Wang, Yongjun; Sun, Jian; Dong, Meng

doi:10.1016/j.vacuum.2015.10.016

Cited by 8 publications

(3 citation statements)

References 16 publications

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“…Efforts have also been made for the measurement of total pressure in LIP. Since 2013, we have carried out theoretical and experimental research on carbon nanotube (CNT) cathode ionization gauge cooperated with Lanzhou University, Wenzhou University, and Bern University of Switzerland [13][14][15][16][17][18][19][20][21][22]. First, we established a three-dimensional physical model of CNT ionization gauge and used SIMION software to simulate the influence of electrode voltage, gate structure, and physical transmittance, etc.…”

Section: Total Pressure Measurement and Calibrationmentioning

confidence: 99%

“…Second, preparation process of CNTs with enhanced performance was developed: uniform and vertical multiwall CNTs were prepared by anodic alumina template method and deposition catalyst method to improve field emission performance [14,15]; free distribution CNTs were directly grew and prepared by oxidation-reduction method to improve emission current density and stability [16,17]. Third, a series of CNT cathode ionization gauges, such as Bayard-Alpert type, separation type, and spherical oscillator type, have been developed based on the abovementioned works [18][19][20][21][22] as shown in Figure 1. Among them, the separation-type CNT cathode ionization gauge has reached the best level reported at present.…”

Section: Total Pressure Measurement and Calibrationmentioning

confidence: 99%

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Applications of Vacuum Measurement Technology in China’s Space Programs

Wang

Zhang

et al. 2021

Space Sci Technol

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The significance of vacuum measurement technology is increasingly prominent in China’s thriving space industry. Lanzhou Institute of Physics (LIP) has been dedicated to the development of payloads and space-related vacuum technology for decades, and widely participated in China’s space programs. In this paper, we present several payloads carried on satellites, spaceships, and space stations; the methodologies of which covered the fields of total and partial pressure measurement, vacuum and pressure leak detection, and standard gas inlet technology. Then, we introduce the corresponding calibration standards developed in LIP, which guaranteed the detection precision of these payloads. This review also provides some suggestions and expectations for the future development and application of vacuum measurement technology in space exploration.

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Section: Total Pressure Measurement and Calibrationmentioning

confidence: 99%

Section: Total Pressure Measurement and Calibrationmentioning

confidence: 99%

Applications of Vacuum Measurement Technology in China’s Space Programs

Wang

Zhang

et al. 2021

Space Sci Technol

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“…In addition, exposure of the devices to the atmosphere will undoubtedly disturb the status of the experimental setup, hence it is impossible to maintain exact test conditions (the degree of vacuum, gas compositions, water contents, etc), not to mention potential contamination to some extent. Some scholars stick down cathodes with silver pastes [6][7][8], as shown in figures 1(b) and (c)). The spacing of the electrode is equal to the thickness (H) of the insulating gasket minus the overall height of the CNTs assembly (h).…”

Section: Introductionmentioning

confidence: 99%

A field emission performance test device for continuous adjustment of the electrode spacing in the vacuum system

Pei

Cheng

et al. 2018

Meas. Sci. Technol.

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This work presents a device that can adjust electrode spacing inside a vacuum system to evaluate the field emission characteristics of a carbon nanotube array cathode grown on a stainless steel (SS) substrate. It was made by coaxial connection of the rear end of a screw micrometer, which acts as the anode, with a stepper motor. The distance between the anode and the cathode was controlled by altering the pitch of the stepper motor with an angle precision of 1 degree. Therefore, the electrode separation can be tuned in the range of 0–15 mm at 1.388 µm incremental steps. Compared with devices with a fixed electrode spacing, the advantage is that this device allows continuous regulation of the electrode spacing after it is placed in a vacuum system to test the emission properties under various electrical parameters in one process, thus avoiding repeated breaking of the vacuum environment. Therefore, test efficiency is improved, hence saving manpower, material resources, testing time and greatly reducing the cost of experimentation. This device is simple in structure and relatively easy to prepare.

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