A Space & astronomy forum. SpaceBanter.com

Go Back   Home » SpaceBanter.com forum » Astronomy and Astrophysics » Amateur Astronomy
Site Map Home Authors List Search Today's Posts Mark Forums Read Web Partners

The photographic medium Joe Public isn't allowed to buy



 
 
Thread Tools Display Modes
  #1  
Old March 16th 18, 09:26 AM posted to sci.astro.amateur
RichA[_6_]
external usenet poster
 
Posts: 1,076
Default The photographic medium Joe Public isn't allowed to buy

Neutron imaging!!

https://en.wikipedia.org/wiki/Neutron_imaging

However, Muon imagers may at some point be available, they are used now to x-ray vehicles in border crossings and muons are free, since they come from space.

  #2  
Old March 16th 18, 11:19 AM posted to sci.astro.amateur
Chris.B[_3_]
external usenet poster
 
Posts: 1,001
Default The photographic medium Joe Public isn't allowed to buy

On Friday, 16 March 2018 09:26:49 UTC+1, RichA wrote:
Neutron imaging!!

https://en.wikipedia.org/wiki/Neutron_imaging

However, Muon imagers may at some point be available, they are used now to x-ray vehicles in border crossings and muons are free, since they come from space.


Go on then, I'll bite.

Why do you want to do neutron or muon imaging?
  #3  
Old March 17th 18, 01:16 AM posted to sci.astro.amateur
Quadibloc
external usenet poster
 
Posts: 7,018
Default The photographic medium Joe Public isn't allowed to buy

Neutrons change atomic nuclei.

So when you do a contact neutron print of a frog, the poor frog is radioactive afterwards.

Contact printing, with a point source of neutrons, is possible.

Since one can't bring neutrons to a focus, astronomical imaging with them will be... awkward.
  #4  
Old March 17th 18, 01:52 AM posted to sci.astro.amateur
Chris L Peterson
external usenet poster
 
Posts: 10,007
Default The photographic medium Joe Public isn't allowed to buy

On Fri, 16 Mar 2018 17:16:25 -0700 (PDT), Quadibloc
wrote:

Neutrons change atomic nuclei.

So when you do a contact neutron print of a frog, the poor frog is radioactive afterwards.

Contact printing, with a point source of neutrons, is possible.

Since one can't bring neutrons to a focus, astronomical imaging with them will be... awkward.


Neutron optics exist, which utilize reflection, diffraction,
refraction, absorption, and magnetic interactions. Modern neutron
sources used for imaging are routinely focused. So I'm not sure that
astronomical imaging opportunities are excluded.
  #5  
Old March 18th 18, 12:59 PM posted to sci.astro.amateur
Gary Harnagel
external usenet poster
 
Posts: 659
Default The photographic medium Joe Public isn't allowed to buy

On Friday, March 16, 2018 at 6:52:58 PM UTC-6, Chris L Peterson wrote:

On Fri, 16 Mar 2018 17:16:25 -0700 (PDT), Quadibloc
wrote:

Neutrons change atomic nuclei.

So when you do a contact neutron print of a frog, the poor frog is
radioactive afterwards.

Contact printing, with a point source of neutrons, is possible.

Since one can't bring neutrons to a focus, astronomical imaging with
them will be... awkward.


Neutron optics exist, which utilize reflection, diffraction,
refraction, absorption, and magnetic interactions. Modern neutron
sources used for imaging are routinely focused. So I'm not sure that
astronomical imaging opportunities are excluded.


Since the half-life of free neutrons is about 15 minutes, neutron imaging
would be useful only within the solar system.
  #6  
Old March 18th 18, 03:13 PM posted to sci.astro.amateur
Chris L Peterson
external usenet poster
 
Posts: 10,007
Default The photographic medium Joe Public isn't allowed to buy

On Sun, 18 Mar 2018 04:59:03 -0700 (PDT), Gary Harnagel
wrote:

Since the half-life of free neutrons is about 15 minutes, neutron imaging
would be useful only within the solar system.


Neutrons are created when cosmic rays strike particles in the
atmosphere, so they could potentially be used as tools in imaging
cosmic ray sources. But my point was that neutrons can be focused if
an application requires it.
 




Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Photographic All-Sky Survey Quadibloc Amateur Astronomy 2 May 14th 11 07:34 AM
Photographic All-Sky Survey Davoud[_1_] Amateur Astronomy 0 May 13th 11 06:59 PM
Photographic All-Sky Survey Ben[_2_] Astronomy Misc 1 May 13th 11 04:22 AM
photographic tripod for binoculars brucegooglegroups Amateur Astronomy 7 November 2nd 06 09:43 PM


All times are GMT +1. The time now is 06:34 AM.


Powered by vBulletin® Version 3.6.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Copyright ©2004-2024 SpaceBanter.com.
The comments are property of their posters.