How to measure the temperature of an arc discharge

In summary, the group discussed ways to measure the temperature of a small arc discharge, with one suggestion being to use a spectrometer with a fiberoptic probe to measure the spectrum of the light. It was also suggested that the temperature could potentially be measured from the radiated electromagnetic fields of the arc.
  • #1
Si14
75
0
Hi all,

I was thinking about measuring the temperature of an arc discharge. The size of the discharge is very small, in the order of micrometer. So it is not possible to put a thermocouple near the it.

Thank you very much.
 
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  • #2
Get a spectrometer with a fiberoptic probe and measure the spectrum of the light.
 
  • #3
It's also going to be highly inhomogeneous.

I'm not sure that the word temperature even makes much sense in the context.
 
  • #4
Thank you. Spectrometer seems to be a good idea. Also, I was wondering if it is possible to measure the temperature from the radiated electromagnetic fields of the arc?
 
  • #5
Si14 said:
Spectrometer seems to be a good idea. Also, I was wondering if it is possible to measure the temperature from the radiated electromagnetic fields of the arc?

That is what a spectrometer measures.
 
  • #6
Thank you.
 

FAQ: How to measure the temperature of an arc discharge

How do you measure the temperature of an arc discharge?

The temperature of an arc discharge can be measured using various methods such as spectroscopy, thermal imaging, thermocouples, and pyrometers. Each of these methods has its own advantages and limitations, and the choice of method depends on the specific requirements of the experiment.

What is the most accurate method for measuring the temperature of an arc discharge?

The most accurate method for measuring the temperature of an arc discharge depends on the specific conditions of the experiment. However, spectroscopy is generally considered to be the most accurate method as it provides a detailed analysis of the emission spectrum of the arc discharge.

Can the temperature of an arc discharge be measured in real-time?

Yes, the temperature of an arc discharge can be measured in real-time using methods such as thermal imaging and pyrometry. These methods provide a continuous measurement of the temperature and can be used to monitor changes in temperature over time.

Are there any safety precautions to consider when measuring the temperature of an arc discharge?

Yes, there are several safety precautions that should be taken when measuring the temperature of an arc discharge. These include wearing appropriate personal protective equipment, ensuring proper grounding of equipment, and following safety protocols for working with high-voltage and high-temperature environments.

How does the temperature of an arc discharge affect its properties?

The temperature of an arc discharge can greatly affect its properties, such as its color, intensity, and stability. Higher temperatures typically result in a brighter and more stable discharge, while lower temperatures may lead to a weaker and less stable discharge. Additionally, changes in temperature can also affect the chemical reactions and plasma physics occurring within the arc discharge.

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