Page 1 of 2 12 LastLast
Results 1 to 10 of 19

Thread: Carbon Disulfide Laser Plasma Tube

  1. #1
    Join Date
    Jun 2009
    Location
    Mesa, AZ
    Posts
    1,274

    Default Carbon Disulfide Laser Plasma Tube

    I found a laser plasma tube that's the daddy of all laser plasma tubes. This early 1980s carbon disulfide tube is a four foot long stainless steel monster that's spent the past 30 years perched on a stump in Bellevue, Washington. The bellows on the ends allowed it to be used in a vacuum chamber, which was necessary because it was cooled with liquid nitrogen running through those channels.

    This is a type of laser nobody hears about, because of its application which I won't go into. Maybe later, when I find references for them. Anyway, this one may live on the porch.

    Click image for larger version. 

Name:	Carbon Disulfide Tube.jpg 
Views:	12 
Size:	588.9 KB 
ID:	53797

  2. #2
    Join Date
    Mar 2015
    Location
    Cambridgeshire, England
    Posts
    478

    Default

    Is that thing for real? Looks like the ultimate steampunk laser to me.

  3. #3
    mixedgas's Avatar
    mixedgas is offline Creaky Old Award Winning Bastard Technologist
    Infinitus Excellentia Ion Laser Dominatus
    Join Date
    May 2007
    Location
    A lab with some dripping water on the floor.
    Posts
    9,673

    Default

    Quote Originally Posted by NobleGas View Post
    Is that thing for real? Looks like the ultimate steampunk laser to me.
    Its real... no one in their right mind would go to that level of detail for a movie prop.

    Steve
    Qui habet Christos, habet Vitam!
    I should have rented the space under my name for advertising.
    When I still could have...

  4. #4
    Join Date
    Nov 2008
    Location
    Cleveland Ohio
    Posts
    2,517

    Default

    Uv or far infar3d? Could not find much about it.

  5. #5
    Join Date
    Jul 2009
    Location
    Orlando, FL
    Posts
    363

    Default

    Far infrared.

    CS2 will lase on 16 lines from 11.482-12.249 uM

  6. #6
    Join Date
    Jun 2009
    Location
    Mesa, AZ
    Posts
    1,274

    Default

    Odd thing is that the windows on the ends of the tube are clear. At 12 microns, I'd expect GaAs, Germanium or ZnSe. It was built in the early '80s by what's now STI Optronics. Here's a pic of John Zumdieck, who donated this along with a copper vapor tube and Nd:Glass slab laser head to the collection, and me after loading it in the SUV.
    Attached Thumbnails Attached Thumbnails CS2 in SUV.jpg  

    Last edited by Eidetic; 03-28-2018 at 06:00.

  7. #7
    mixedgas's Avatar
    mixedgas is offline Creaky Old Award Winning Bastard Technologist
    Infinitus Excellentia Ion Laser Dominatus
    Join Date
    May 2007
    Location
    A lab with some dripping water on the floor.
    Posts
    9,673

    Default

    Probably sapphire or one of the IRTRANs for 5-6 micron or 12 micron CS2 mixtures, CS2 lases in a bunch of places, depending on what its mixed with. if its truly for CS2.. DOD has some rather unique broad spectrum windows etc... Some of them are clear out to 15 microns, so one can't play "Guess that Window" if its one of Uncle's toys.
    Sort of looks like an excimer tube I've seen before...

    Steve
    Last edited by mixedgas; 03-28-2018 at 17:20.
    Qui habet Christos, habet Vitam!
    I should have rented the space under my name for advertising.
    When I still could have...

  8. #8
    Join Date
    Nov 2008
    Location
    Cleveland Ohio
    Posts
    2,517

    Default

    It can lase yellow so Iím no longer interested....

  9. #9
    mixedgas's Avatar
    mixedgas is offline Creaky Old Award Winning Bastard Technologist
    Infinitus Excellentia Ion Laser Dominatus
    Join Date
    May 2007
    Location
    A lab with some dripping water on the floor.
    Posts
    9,673

    Default

    Kecked, you really just need an old Novus Varia from Coherent... 1.2 watts of CW solid state yellow as well as red and green. However you can get a nice beemer (BMW, not Beamer as in projector) for what those go used. There is a Sapphire 561-100 head on Fleabay right now, lasng, but no driver. However you can feed a lot of homeless people for a week for 1,000$.


    Steve
    Last edited by mixedgas; 03-28-2018 at 17:55.
    Qui habet Christos, habet Vitam!
    I should have rented the space under my name for advertising.
    When I still could have...

  10. #10
    Join Date
    Jun 2009
    Location
    Mesa, AZ
    Posts
    1,274

    Default

    I found a paper that I believe describes this old plasma tube, or at least the research that included it. It's "High-pressure CS2 electric discharge laser" by Nelson, L.Y., Fisher, C.H., Byron, S.R., Applied Physics Letters, 25, 9, 517 (1974). Looks like this tube is from the mid-1970s and not the early 1980s. The paper mentions the use of KI windows. Those would look clear, but I didn't think they would survive outdoors in the Seattle area for 40 years. Amazing.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •