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ArcticMyst Security by Avery

Working HeCd is coming to town!

Joined
Apr 26, 2010
Messages
4,175
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83
So keep in mind that HeCd is pronounced "hee-cad"

You better not pout,
You better not wine.
It take 10mins of warmup time
Working HeCd is coming to town

Made ages ago,
For special printing.
Some even did full whitelight
Working HeCd is coming to town!

It lases if you're waiting,
But not when high pressure.
It uses Cd and buffer gas,
To lase ultraviolet!

With external mirrors, and Brewster windows.
A cadmium tube and He reservoir.
Working HeCd is coming to town!
Working HeCd is coming to town!

Working HeCd is coming, to tooooowwwwwnnn!!!!



On a more serious note, it's coming from Phil, the better half to Sam. Professionally.

It has 354nm optics last I checked, and can be made to lase both other lines 325 and 442 with proper optics.

It's in working condition, and Phil will be running maintenance runs until I totally pay off my debt to Sam (hehe...)

Will update when it's here, this is very early, but I wanted to post this while still in the holiday spirit.
 





Joined
Aug 21, 2009
Messages
388
Points
43
HeCd's are cool. i got to spend quality time with one of daguin's at socalem. it was doing lovely 442 and not a lot of mW, but still was a ***y ***y beast.

socalem-n-000157 | Flickr - Photo Sharing!

So keep in mind that HeCd is pronounced "hee-cad"

You better not pout,
You better not wine.
It take 10mins of warmup time
Working HeCd is coming to town

Made ages ago,
For special printing.
Some even did full whitelight
Working HeCd is coming to town!

It lases if you're waiting,
But not when high pressure.
It uses Cd and buffer gas,
To lase ultraviolet!

With external mirrors, and Brewster windows.
A cadmium tube and He reservoir.
Working HeCd is coming to town!
Working HeCd is coming to town!

Working HeCd is coming, to tooooowwwwwnnn!!!!



On a more serious note, it's coming from Phil, the better half to Sam. Professionally.

It has 354nm optics last I checked, and can be made to lase both other lines 325 and 442 with proper optics.

It's in working condition, and Phil will be running maintenance runs until I totally pay off my debt to Sam (hehe...)

Will update when it's here, this is very early, but I wanted to post this while still in the holiday spirit.
 
Joined
Jul 4, 2012
Messages
2,834
Points
63
What use will you have for a UV gasser? Just a piece to add to your collection?
 
Joined
Apr 26, 2010
Messages
4,175
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83
What use do you have your for laser collection? ;)

Yes, it will be a wonderful addition to my collection. However that is not all.

More so, it will be a learning tool for how these types of lasers work. I have ideas to build at least two He-metal vapor lasers (HVL).

I have a dead one, and a diagram of all it's components. I use the two of these to follow the "ion path" of sorts. Following the sidearm He reservoir, to the laser bore. As well as locating the Cd well and doing the same. Finding where they mix, looking at the cold trap at the OC. Viewing what the laser would look like in slow motion in my head. How it'd all work out. Understanding why they put certain pieces where.

This will allow me to actually watch this process live, and give me practice with aligning such lasers.

What better way to learn about HVLs, and learn how to build my own, than by watching one run?

So in a nutshell, my "use" for this laser is to learn about them, so I can build my own :). The UV? Well, that's just a bonus to fill a wavelength gap :)
 
Joined
Apr 26, 2010
Messages
4,175
Points
83
Currently working on a DIY CO2, as it's the easiest gas to build that actually requires a vacuum. Without the vacuum, that'd make TEA/N2 easiest.
 
Joined
Mar 10, 2013
Messages
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Congrats bloom :)

I got news on that brewster and 612 too. Should have them soon. I'll post when they make it in.
 

benmwv

0
Joined
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Messages
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Currently working on a DIY CO2, as it's the easiest gas to build that actually requires a vacuum. Without the vacuum, that'd make TEA/N2 easiest.

Got any sugestions on a dye I could try with my TEA and how to make a good dye cell?

Preferably cheap! I have heard it possible to lase some types of laundry detergent for example.
 
Joined
Apr 26, 2010
Messages
4,175
Points
83
Depends on the spectrum you want.

If you want around 480-520, use a coumarin variation. If you want reds and oranges, use rhodamine. Specifically rhodamine 6G for decent orange coverage.

Look up the above two (coumarin and rhodamine) to find good variants for your specific wavelength. They all have different versions for different spectrums.

As far as decent dye cells, the most basic, and very functional, uses microscope slides held together with silicone or hot glue. Just remember that the output from the dye cell will be perpendicular to the input beam.

The above leads to a couple more add-one to the laser. Either to increase output, or provide tunability.

On one output side (waste beam) you can add a mirror that effectively send that light back through the cavity (dye cell) to the output. Meaning more power.

If you use a reflective grating, you can use it to sleeve wavelengths if you're using a dye that allows resonation of more than one, such as a rhodamine like mentioned above.

Look up "tunable dye laser" for schematics. Even google images is your friend here.

Best of luck! I look forward to your results! :)
 

benmwv

0
Joined
Sep 10, 2010
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Taking this to pm so I dont mess up your HeCd thread anymore!
 
Joined
Dec 11, 2011
Messages
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OOoooooooooo! Seriously, text can't convey my "Ooo" loud enough.

Freaking awesome. Seriously, I've been lusting after a UV HeCd for years now. You. Must. Take. Pictures. MUST!
 
Joined
Apr 26, 2010
Messages
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No!
44537348.jpg


In all seriousness, yes, this will be well documented.
 




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