TECHNET Archives

October 2007

TechNet@IPC.ORG

Options: Use Monospaced Font
Show Text Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
From:
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Hfjord <[log in to unmask]>
Date:
Mon, 1 Oct 2007 21:30:55 +0200
Content-Type:
text/plain
Parts/Attachments:
text/plain (98 lines)
Dave,

 The glycol is necessary for working conditions down to as low as minus 55
Centigrades. MIL stuff. The cavity is Titanium, but the mirror is polished
Silver.

/Inge

 

-----Ursprungligt meddelande-----
Från: [log in to unmask] [mailto:[log in to unmask]] 
Skickat: den 1 oktober 2007 19:46
Till: [log in to unmask]; [log in to unmask]
Ämne: RE: I don't expect much answers on this....

 

Hey Inge; 

  We run a flash lamp pumped ESI 5100 YAG - Uv laser drill here in our shop.
However, the cavity is gold not titanium. I've never heard of a titanium
cavity before, or the use of glycol for cooling water. Our unit uses
de-ionized water only to maintain the necessary resistivity / cooling
properties. We've never seen any sort of oxidation / grey stuff as you
mention within our laser's cavity, or anywhere else within the entire
cooling system. You may be correct about the glycol decomposition. It may
even be attacking the metal cavity and precipitating the 'grey' stuff.

Dave S. 

-----Original Message----- 
From: Hfjord [mailto:[log in to unmask]] 
Sent: Monday, October 01, 2007 12:58 PM 
To: [log in to unmask] 
Subject: I don't expect much answers on this.... 

 

...but I'll try. TNetters are full of surprise. Laser cavity, silver
mirrors, YAG rod. Circulating liquid is water/ethanol glycol fifty-fifty.
After some time, the output goes lower because the mirror becomes
contaminated. When you open the cavity and pour out the cooling liquid, you
find the walls of the Titanium cavity covered with grayish stuff. I suspect
that the flash lamp high intensity light decomposes (oxidizes) the glycol.
I'd rather use fluorcarbon inert,like FC77 which also can work lower than
minus 55 Centigrades. Question: anyone seen something else than water/glycol
as cooling medium around the rod? And what do you think of my theory on
decomposition of the glycol? Abcd?

Thanks in advance 

Inge 

--------------------------------------------------- 
Technet Mail List provided as a service by IPC using LISTSERV 15.0 To
unsubscribe, send a message to [log in to unmask] with following text in the
BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or
(re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet
NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send
e-mail to [log in to unmask]: SET Technet Digest Search the archives of
previous posts at: http://listserv.ipc.org/archives Please visit IPC web
site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional
information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100
ext.2815

----------------------------------------------------- 


CONFIDENTIALITY
This e-mail message and any attachments thereto, is intended only for use by
the addressee(s) named herein and may contain legally privileged and/or
confidential information. If you are not the intended recipient of this
e-mail message, you are hereby notified that any dissemination, distribution
or copying of this e-mail message, and any attachments thereto, is strictly
prohibited. If you have received this e-mail message in error, please
immediately notify the sender and permanently delete the original and any
copies of this email and any prints thereof.
ABSENT AN EXPRESS STATEMENT TO THE CONTRARY HEREINABOVE, THIS E-MAIL IS NOT
INTENDED AS A SUBSTITUTE FOR A WRITING. Notwithstanding the Uniform
Electronic Transactions Act or the applicability of any other law of similar
substance and effect, absent an express statement to the contrary
hereinabove, this e-mail message its contents, and any attachments hereto
are not intended to represent an offer or acceptance to enter into a
contract and are not otherwise intended to bind the sender, Sanmina-SCI
Corporation (or any of its subsidiaries), or any other person or entity.


---------------------------------------------------
Technet Mail List provided as a service by IPC using LISTSERV 15.0
To unsubscribe, send a message to [log in to unmask] with following text in
the BODY (NOT the subject field): SIGNOFF Technet
To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL)
To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest
Search the archives of previous posts at: http://listserv.ipc.org/archives
Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815
-----------------------------------------------------

ATOM RSS1 RSS2