| 摘要 |
A collection device for collecting particles from a gas is provided. The device comprises a passage defined by a wall and at least one electrical field within the passage for charging particles, where the particles are in a gas. The device further comprises a moving collection surface for collecting charged particles. The moving collection surface is located within the at least one passage. The moving collection surface rotates through the at least one electrical field and then rotates to a detection device for detection of the particles.
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