Talk:Free electron laser
From Wikipedia, the free encyclopedia
 |
This article is within the scope of WikiProject Physics, which collaborates on articles related to physics. |
| ??? | This article has not yet received a rating on the assessment scale. [FAQ] |
| ??? | This article has not yet received an importance rating within physics. |
|
Help with this template Please rate this article, and then leave comments to explain the ratings and/or to identify its strengths and weaknesses. |
|
I've replaced two images with the image from the german article. Feel free to re-add the others if you think otherwise. IMHO in FEL1.jpg the electron beam doesn't wiggle at all and in FEL2.jpg in the wrong plane. --Pjacobi 12:25, 2005 Mar 6 (UTC)
- Yup, better picture. It's just kinda too small though. Any chance you've got something about 200-400px big? Cal 1234 15:52, Mar 6, 2005 (UTC)
Contents |
[edit] The name of an X-ray device
Since a "microwave amplification by stimulated emission of radiation" device is called a maser and a "light amplification by stimulated emission of radiation" device is called laser, an "X-ray amplification by stimulated emission of radiation" device should most properly be called either a xaser, or since masers were first, an X-ray maser? Besides xaser being hard to pronounce, laser is a much more common term than maser ever was, so I imagine that it will stay "X-ray laser". --David R. Ingham 23:28, 18 July 2005 (UTC)
[edit] Very Dense Verbage
I have a doctorate in biophysics, yet I could not understand discussion of the XFEL. Sorry to whoever worte it. :) Can someone who understands the basic underlying theory rewrite this section in the style of the "News/Focus" section of the journal Science. An example: the current versions says "down to a wavelength of 1.5 Ångstroms." How good is that? How "hard" are x-rays of that wavelength? The journal Science says, "These 'hard' x-ray wavelengths—down to 0.1 nanometers—promise to reveal the structure of proteins that have eluded other techniques and nanometer-scale features inmeterials.",[1] This is an excellent example of the style I would like to see here. Can someone who understands the technology please describe how XFEL are built and generate x-rays? Nwbeeson 14:53, 20 November 2006 (UTC)
[edit] Last paragraph of FEL creation
It seems to me that the word "so" is used too many times in this paragraph, it doesn't read well.
"Depending on the position along the undulator the oscillation of an electrons is in phase or not in phase with this radiation. So the light either tries to accelerate or decelerate this electrons. So it gains or loses kinetic energy, so it moves faster or slower along the undulator. So the electrons form bunches. Now they are synchronized and will in turn emit synchronized (that is coherent) radiation."
I would recommend replacing it with something like:
"Depending on the position along the undulator the oscillation of an electrons is in phase or not in phase with this radiation. The light either tries to accelerate or decelerate this electrons. It thereby gains or loses kinetic energy, so it moves faster or slower along the undulator. This causes the electrons to form bunches. Now they are synchronized, and will in turn emit synchronized (that is coherent) radiation."
--Patrick--70.58.248.157 23:39, 8 December 2006 (UTC)
[edit] Outside Links
freakin ucsb's free electron laser http://sbfel3.ucsb.edu/ —Preceding unsigned comment added by 68.6.66.57 (talk) 05:03, 18 September 2007 (UTC)
