Abstract:
An apparatus and a method for measuring gas absorption characteristic of a cryogenic pump absorption panel are provided to improve an exhaust method of a cryogenic pump by estimating exhaust capability of the cryogenic pump. An apparatus for measuring gas absorption characteristic of a cryogenic pump absorption panel includes an electronic gun(210), a sensor(240), and a calculating unit. The electronic gun is installed in a chamber and inputs an electronic beam to the absorption panel. The sensor is installed in the chamber and detects an ion flying time and the amount of ion output from the surface of the absorption panel. The calculating unit determines a sort of gas, absorbed in the absorption panel, and calculates the amount of the gas from the ion flying time and the amount of ion.
Abstract:
A calibration/test device and method of a mass flowmeter equipped on a vacuum system are provided to improve efficiency of quality control by calibrating/testing the mass flowmeter with comparing it with a reference mass flowmeter attached to a mobile correction device. A calibration/test device of a mass flowmeter equipped on a vacuum system comprises a vacuum valve(14) and a mass flowmeter valve(16) to be corrected, which are serially installed in a pipeline, a connection port(18) connecting the vacuum valve and the mass flowmeter valve, and a mobile mass flowmeter correction device(100) connected to the connection port. The mobile mass flowmeter correction device includes a vacuum chamber(110) connected to the connection port, a chamber valve(114) connecting the vacuum chamber and the connection port, a reference mass flowmeter(116) connecting the chamber valve and the connection port, a reference mass flowmeter valve(118) regulating the gas flux, an air escape(120) exhausting the gas, a gate valve(122) connected between the vacuum chamber and the air escape, and a measuring unit measuring the physical properties of the gas flowing within the vacuum chamber.