1. Oct 10, 2007

### rockingroli

Hi

I have a question about the common unit for the intensity of a synchrotron X-Ray spectrum:

$$\frac{Photons}{sec*mrad^{2}*0.1\%BW}$$

I am not sure how to interpretate the 0.1%BW.

How do I get the numbers of Photons/sec/mrad2 in an Energy range lets
say from energy $$E_1$$ to energy $$E_2$$ ?

I really need to know this !!!

Thank you for any help

Roland

2. Oct 10, 2007

### Staff: Mentor

I believe 0.1%BW indicates bandwidth, which seems to be verified by

http://www.research.ibm.com/journal/rd/444/jordansweet.html [Broken] - see end of paragraph 3

Last edited by a moderator: May 3, 2017
3. Sep 30, 2008

### zegris

Let's consider this example: I've got the flux from undulator at some point, say 10^9 photons/s at 3 keV. What is 0.1%bw in this case?

4. Oct 5, 2008