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Hollow Cathode Spectral lamp

Hollow Cathode Spectral lamp

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Looking end on into a Cu hollow cathode lamp for use in spectroscopy.

gec_sox_90.jpg Hollow_cathode_lamp.jpg hollow_cathode.jpg uv_lamp.jpg

Light Information

Light Information

Manufacturer:PYE UNICAM
Electrical
Wattage:Approx 1W
Voltage:300v
Current:5 mA
Physical/Production
Application/Use:Spectral source

File information

File information

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Filename:hollow_cathode.jpg
Album name:tuopeek / Low Pressure Lamps
Keywords:Lamps
File Size:138 KB
Date added:May 03, 2012
Dimensions:1000 x 959 pixels
Displayed:215 times
Date Time:2012:05:03 22:31:13
DateTime Original:2012:04:29 06:33:20
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dor123
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May 04, 2012 at 01:07 AM Author: dor123
Cu means copper. Is this the element inside the arctube?
For spectra lamps that uses a metal vapors, i expecting that they will be build similar to the MV lamps, because of the high temperature that is necessary to vaporise the metals (Except low pressure mercury, which operates at low temperature and can be used in hollow cathodes design).

I"m don't speak english well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I hope that LED won't replace all forms of other lighting.

tuopeek
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tuopeek 111967450636623837217 tuopeek1 77334065@N05/
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May 04, 2012 at 01:48 AM Author: tuopeek
dor123: Yes it is copper. It looks like the hollow cathode is made of copper its self. I suspect this has to be the case as the wattage is very low. Any over current tends to evaporated metal which condenses on the glass wall and darkens it.
dor123
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May 04, 2012 at 02:39 AM Author: dor123
If the copper is the electrodes material, so what that is important is what is the element that the plasma is based and not the element that the electrodes are made from.
The spectrum is made by the gas or the metal vapor in the arctube.
A side view of the lamp, provides more details.
The color of the discharge looks to me like nitrogen.

I"m don't speak english well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I hope that LED won't replace all forms of other lighting.

tuopeek
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GLS on Tesla Coil


tuopeek 111967450636623837217 tuopeek1 77334065@N05/
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May 04, 2012 at 05:11 AM Author: tuopeek
dor123: Almost all of the visible discharge is within the hollow cathode, where there will be Cu ions. You are correct that there is a gas in the lamp too. I think it may be argon but I am not sure. I will try and take a side on picture too, but I don’t think the discharge will be visible.
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