Orientation of gel?

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Joined: Wed Jan 10, 2007 11:21 am

Orientation of gel?

Post by dannyhcox »

to get a better point of reference and help to better eliminate false submissions, it would help to know what the orientation is of the get to the point of contact from the mater in question.

In short, are the gels all oriented such that the foreign matter will always be entering from a top down angle of attack?

Or is it possible that a particle could in fact be entering from the bottom or side upwards in the viewed gel (as seen in the image)?

I am looking at slide 3203635V1, and at about the half way point of the focus, I see a very small abberation appear whose track seems to start slightly from the left and work it way upward. It is very faint and slight and I doubt it's a targeted particle, but probably some sort of tear or bubble...

The location is about 45% from left to right, and about 33% down from top of image.

Please advise,



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Every which way but upward.

Post by fjgiie »

Hi dannyhcox,

First, here is movie 3203635V1 .
http://stardustathome.ssl.berkeley.edu/ ... =3203635V1
The surface comes into focus below midpoint of the focus bars. The line you speak of is near the surface, or on the surface.

How to determine where particles come from
http://stardustathome.ssl.berkeley.edu/ ... php?t=1105

From this post:
http://stardustathome.ssl.berkeley.edu/ ... light=#968
"As to what we are expecting for the real dust tracks: the interstellar dust stream entering our solar system comes from one direction, but we don't know in advance what the exact spread of incident angles will be. Tracks made by interplanetary dust particles in the collector can come from any direction."



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Joined: Wed Aug 09, 2006 11:38 pm

Re: Orientation of gel?

Post by Tom_Gutman »

The aerogel was (and still is) held in a frame, with only one side (the top) exposed. All particles have to have impacted that top surface. Interstellar particles are expected to have near vertical tracks (although it is not known exactly how near). Local dust (interplanetary, cometary) could have shallower tracks.
Tom Gutman

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