On-Line Measurement of Vacuum Arc Cathode Discharge Droplet

Cunjin Sun; Geyi Su; Haitao Yu; Chang Tian; Pan Dong; Mingxu Su

doi:10.3788/LOP231868

Laser & Optoelectronics Progress, Volume. 61, Issue 15, 1512002(2024)

On-Line Measurement of Vacuum Arc Cathode Discharge Droplet

Cunjin Sun¹, Geyi Su¹, Haitao Yu², Chang Tian¹, Pan Dong³, and Mingxu Su^1、*

¹School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai 200093, China

²College of Science, University of Shanghai for Science and Technology, Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai 200093, China

³Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, Sichuan, China

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Figures & Tables(8)

Fig. 1. Structure diagram of measurement system

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Fig. 2. Schematic diagram of two types of detectors. (a) Conventional detector; (b) CCD detector

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Fig. 3. Distribution of scattered light flux of PSL particles with four different sizes. (a)‒(d) 0.7, 2.6, 9.4, 15 μm

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Fig. 4. Scattered light energy and particle size distribution of four metal droplets. (a) Distribution of scattered light energy; (b) particle size distribution of four metals

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Fig. 5. Particle size distribution of four metals.(a)‒(b) Al, Fe, Ti, Mo

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Table 1. Inversion results of standard particles
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Table 1. Inversion results of standard particles
Given size /μm D_n₅₀ /μm Relative error /%
0.68±0.01 0.71 4.41
2.60±0.10 2.63 1.12
9.30±0.20 8.98 3.44
14.40±0.30 15.12 5.00

Table 2. Refractive index of metal
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Table 2. Refractive index of metal
Metal type Melting point of metal /℃ Refractive index
Al 660 1.56+7.71i
Fe 1538 1.82+7.63i
Ti 1668 2.74+3.71i
Mo 2620 0.89+9.06i

Table 3. Inversion results of different discharge pulse widths
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Table 3. Inversion results of different discharge pulse widths
Metal type Melting point of metal /℃ D_n₅₀ /μm
2 μs 4 μs 6 μs 8 μs
Al 660 1.62 1.55 1.58 1.58
Fe 1538 1.21 1.27 1.25 1.23
Ti 1668 1.15 1.18 1.17 1.15
Mo 2620 0.71 0.73 0.73 0.68

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Cunjin Sun, Geyi Su, Haitao Yu, Chang Tian, Pan Dong, Mingxu Su. On-Line Measurement of Vacuum Arc Cathode Discharge Droplet[J]. Laser & Optoelectronics Progress, 2024, 61(15): 1512002

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