Page 1 of 2 12 LastLast
Results 1 to 10 of 15

Thread: Strange Argon of 80's

  1. #1
    Join Date
    Apr 2008
    Location
    Poland
    Posts
    321

    Unhappy Strange Argon of 80's

    Hello all,
    I stumbled upon an exotic Argon laser tube, should I call it an 'insert'.
    Quite elaborate glass structure, carbon disks design (like old Coherents).
    Was factory new, until lower brewster stem came off.

    Apparently it's symbol is/was: RA120-1, most likely German, built 1989.
    It may have been a custom design / university special order. Stamped as 1.9 / 1.5 Watt.

    What struck me most is this 10 coil (?) setup under the casing.
    Anyone dare to make an educated guess of it's purpose ?
    See pics.
    Piotr.K
    Click image for larger version. 

Name:	ArW01.jpg 
Views:	69 
Size:	236.2 KB 
ID:	52895Click image for larger version. 

Name:	ArW02.jpg 
Views:	53 
Size:	251.0 KB 
ID:	52896Click image for larger version. 

Name:	ArW03.jpg 
Views:	54 
Size:	310.6 KB 
ID:	52897Click image for larger version. 

Name:	ArW04.jpg 
Views:	65 
Size:	462.7 KB 
ID:	52898Click image for larger version. 

Name:	ArW05.jpg 
Views:	61 
Size:	839.1 KB 
ID:	52899Click image for larger version. 

Name:	ArW06.jpg 
Views:	46 
Size:	225.1 KB 
ID:	52900Click image for larger version. 

Name:	ArW07.jpg 
Views:	49 
Size:	236.5 KB 
ID:	52901Click image for larger version. 

Name:	ArW08.jpg 
Views:	45 
Size:	306.1 KB 
ID:	52902
    Last edited by LesioQ; 09-24-2017 at 23:16.

  2. #2
    Join Date
    Oct 2012
    Location
    Germany
    Posts
    1,026

    Default

    ... are you shure, it's an Argon?

    The coils and disks can point to a sort of Excimer or FEL ??

    Viktor

  3. #3
    mixedgas's Avatar
    mixedgas is online now 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
    9,159

    Default

    That's a graphite disk ion laser for sure, manufacturer unknown.

    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
    Jun 2009
    Location
    Mesa, AZ
    Posts
    1,207

    Default

    Wonderful old tube! I'm certainly interested in adding it to the archive if you'd ever consider selling it.

  5. #5
    Join Date
    Apr 2008
    Location
    Poland
    Posts
    321

    Default

    Quote Originally Posted by Eidetic View Post
    Wonderful old tube! I'm certainly interested in adding it to the archive if you'd ever consider selling it.
    Well, that would be the 4th or 6th from me but definitely the hardest one to ship from Europe

    I just took measurements of these coils - they are 10 Ohm, so rather look like heaters.
    And one more surprise - each of them covers a solidified metallic ingot inside glass:
    Click image for larger version. 

Name:	ArW09.jpg 
Views:	35 
Size:	371.0 KB 
ID:	52903

    This is mysterious. A ... Gallium ? Definitely not mercury, but with low melting point. May be Cadmium, but Cd lasers used to have their Cd ovens heatshielded ...
    May it be that these are one-time-use Ar ampoules ?
    Last edited by LesioQ; 09-25-2017 at 09:43.

  6. #6
    Join Date
    Jun 2009
    Location
    Mesa, AZ
    Posts
    1,207

    Default

    Could the coils and plugs be part of a gas fill system? I'd expect that with an ion laser tube.

  7. #7
    Join Date
    Apr 2008
    Location
    Poland
    Posts
    321

    Default

    This may be the case, but how would this higher pressure Ar gas pocket join the main laser volume without pushing the molten metal to undesired location ...

  8. #8
    Join Date
    Jun 2008
    Location
    Yellowknife, NT, Canada
    Posts
    2,147,484,113

    Default

    Perhaps a molecular sieve like those found in a HeCd for helium fill...?

  9. #9
    mixedgas's Avatar
    mixedgas is online now 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
    9,159

    Default

    There were a wide variety of metals under investigation for CW ion lasers, some of which were quite promising. Tin for example.
    Thallium (toxic nasty !), arsenic, silver, tellurium, and the non-metals iodine, oxygen, fluorine, chlorine, neon, nitrogen. All would have made very interesting lab lasers similar to and in some cases had better gain then the argon ion laser. The problem was finding a cathode with similar emission to tungsten-rhenium that would not be ripped to shreds by the plasma, and that is where development stopped. I suspect your looking at a tube for a radical material.
    ~
    As for the heated side tubes, I would not guess either way without a XPS shot to identify the metal. If its indium, its probably a fill system. Anything else is probably a metal fill. I can tell you I see no zeolite there.
    ~
    Steve
    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
    Apr 2008
    Location
    Poland
    Posts
    321

    Default

    A few more pictures for interested parties:
    Attached Thumbnails Attached Thumbnails ArW23.jpg  

    ArW22.jpg  

    ArW21.jpg  

    ArW24.jpg  


Posting Permissions

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