Overview

This article presents a protocol for measuring the outgassing rates of hydrogen from steel vacuum chambers using the rate-of-pressure rise method. This technique is particularly useful for assessing low outgassing materials.

Key Study Components

Area of Science

Vacuum technology
Material science
Pressure measurement

Background

Outgassing is a critical factor in vacuum systems.
Hydrogen outgassing can affect vacuum performance.
Understanding outgassing rates helps in material selection.
The rate-of-pressure rise method provides a systematic approach.

Purpose of Study

To measure the outgassing rate of hydrogen from vacuum chambers.
To evaluate the performance of low outgassing materials.
To demonstrate the procedure for systematic measurement.

Methods Used

Assemble vacuum components using copper gaskets.
Tighten flange joints face to face with a wrench.
Leave the joint between the sample chamber and isolation valve untightened.
Measure pressure rise to determine outgassing rates.

Main Results

The method allows for the measurement of very low outgassing rates.
Systematic measurements can be obtained from small samples.
Demonstration of the procedure by a graduate student.
Potential applications in vacuum measurement and material evaluation.

Conclusions

The rate-of-pressure rise method is effective for measuring hydrogen outgassing.
This protocol can enhance understanding of vacuum chamber performance.
Further research can expand on low outgassing material applications.

Frequently Asked Questions

What is the main goal of this protocol?

The main goal is to measure the outgassing rate of hydrogen from vacuum chambers.

Why is measuring outgassing rates important?

It helps in understanding vacuum performance and material selection.

What materials can be evaluated using this method?

The method is suitable for very low outgassing materials and small samples.

Who demonstrates the procedure?

The procedure will be demonstrated by Se-Hyun Kim, a graduate student.

What is the advantage of the rate-of-pressure rise method?

It allows for systematic measurement of outgassing rates, even from low outgassing materials.

How are the vacuum components assembled?

Components are assembled using copper gaskets and tightened face to face.

Institution - POSTECH

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