Changeset 5ed76f8 in sasview for src/sas/sasgui/perspectives/calculator/media/kiessig_calculator_help.rst

Timestamp:

Apr 7, 2017 3:11:41 AM (7 years ago)

Author:

Paul Kienzle <pkienzle@…>

Branches:

master, ESS_GUI, ESS_GUI_Docs, ESS_GUI_batch_fitting, ESS_GUI_bumps_abstraction, ESS_GUI_iss1116, ESS_GUI_iss879, ESS_GUI_iss959, ESS_GUI_opencl, ESS_GUI_ordering, ESS_GUI_sync_sascalc, magnetic_scatt, release-4.2.2, ticket-1009, ticket-1094-headless, ticket-1242-2d-resolution, ticket-1243, ticket-1249, ticket885, unittest-saveload

Children:

fca1f50

Parents:

727c05f

Message:

docs: use latex in equations rather than unicode + rst markup

File:

• src/sas/sasgui/perspectives/calculator/media/kiessig_calculator_help.rst (modified) (2 diffs)

src/sas/sasgui/perspectives/calculator/media/kiessig_calculator_help.rst

@@ -10 +10 @@
 -----------
 
-This tool is approximately estimates the thickness of a layer or the diameter 
-of particles from the position of the Kiessig fringe/Bragg peak in NR/SAS data 
-using the relation
+This tool estimates real space dimensions from the position or spacing of
+features in recipricol space.  In particular a particle of size $d$ will
+give rise to Bragg peaks with spacing $\Delta q$ according to the relation
 
-(thickness *or* size) = 2 * |pi| / (fringe_width *or* peak position)
-  
+.. math::
+
+    d = 2\pi / \Delta q
+
+Similarly, the spacing between the peaks in Kiessig fringes in reflectometry
+data arise from layers of thickness $d$.
+
 .. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
 
@@ -21 +26 @@
 --------------
 
-To get a rough thickness or particle size, simply type the fringe or peak 
+To get a rough thickness or particle size, simply type the fringe or peak
 position (in units of 1/|Ang|\) and click on the *Compute* button.
 
 .. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ
 
-.. note::  This help document was last changed by Steve King, 01May2015
-
+.. note::  This help document was last changed by Paul Kienzle, 05Apr2017