“spark chamber”的概念、定义、翻译、参考文献-科学参考

spark chamber

Physics

A device for detecting charged particles. It consists of a chamber, filled with helium and neon at atmospheric pressure, in which a stack of 20 to 100 plates are placed; the plates are connected alternately to the positive and negative terminals of a source of high potential (10 000 V or more). An incoming particle creates ion pairs in its track, causing the gas to become conducting and sparks to jump between the plates. The light from the sparks is focused to obtain stereoscopic photographs of the particles’ tracks. It can also function as a counter (called a spark counter) when connected to suitable counting circuits. Some versions use crossed sets of parallel wires rather than plates; simple patterns may have a single wire near a plate, in the open atmosphere.

Astronomy

A device that shows the path of a charged particle. It consists of a series of parallel plates mounted in a gas such as neon. When a particle passes through a detector mounted above the chamber it triggers a high-voltage pulse to the spark chamber. The ions generated by the passage of the particle allow a spark to travel between the plates along the path taken by the particle. The tracks can be recorded using photomultiplier tubes. The device can be used to detect cosmic rays and gamma rays.

单词	spark chamber
释义	spark chamber Physics A device for detecting charged particles. It consists of a chamber, filled with helium and neon at atmospheric pressure, in which a stack of 20 to 100 plates are placed; the plates are connected alternately to the positive and negative terminals of a source of high potential (10 000 V or more). An incoming particle creates ion pairs in its track, causing the gas to become conducting and sparks to jump between the plates. The light from the sparks is focused to obtain stereoscopic photographs of the particles’ tracks. It can also function as a counter (called a spark counter) when connected to suitable counting circuits. Some versions use crossed sets of parallel wires rather than plates; simple patterns may have a single wire near a plate, in the open atmosphere. Astronomy A device that shows the path of a charged particle. It consists of a series of parallel plates mounted in a gas such as neon. When a particle passes through a detector mounted above the chamber it triggers a high-voltage pulse to the spark chamber. The ions generated by the passage of the particle allow a spark to travel between the plates along the path taken by the particle. The tracks can be recorded using photomultiplier tubes. The device can be used to detect cosmic rays and gamma rays.
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