Phil,
This is not my area of expertise.

However, I have been told that parts are more susceptible to "soft" x-rays
than hard ones.  So the answer to that is putting a layer of household
aluminum foil over your x-ray source.  It will not degrade your image as it
is formed by the hard x-rays anyways. At least that is what I have been
told.
Bev
RIM

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Phil Bavaro
Sent: Tuesday, November 20, 2012 6:30 PM
To: [log in to unmask]
Subject: [TN] Xray Inspection of Flight Hardware for Space Applications

Ok, here is one that is news to me.......

We have an effort going on that involves measuring the radiation that an
x-ray inspection system exposes to space application hardware.

I was surprised to find that there are a few papers online speaking
relatively to this issue and one dated as early as 2007.

The issue seems to be that components without a lot of Radiation Design
Margin (RDM) may get their margin used up during assembly inspection
operations if the exposure exceeds a certain number of kRad(Si).

I know I have been out of the loop for Class 3A Space hardware for a while,
but I find it hard to believe that x-ray inspection has the potential to
damage any hardware.

What kind of controls do the rest of you have in place to account for this
potential assembly nightmare?  I know many of us are building Space hardware
with BGAs, QFNs, etc but now I am wondering how do you know that a given
part is ok to put through the x-ray inspection machine.

I guess I should be happy.....it isn't everyday that I learn something new.
________________________________
 This message and any attachments are solely for the use of the addressee
and may contain L-3 proprietary information that may also be defined as USG
export controlled technical data. If you are not the intended recipient, any
disclosure, use or distribution of its content is prohibited. Please notify
the sender by reply e-mail and immediately delete this message and any
attachments.

______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________


______________________________________________________________________
This email has been scanned by the Symantec Email Security.cloud service.
For more information please contact helpdesk at x2960 or [log in to unmask] 
______________________________________________________________________