ESS_GUIESS_GUI_DocsESS_GUI_batch_fittingESS_GUI_bumps_abstractionESS_GUI_iss1116ESS_GUI_iss879ESS_GUI_iss959ESS_GUI_openclESS_GUI_orderingESS_GUI_sync_sascalccostrafo411magnetic_scattrelease-4.1.1release-4.1.2release-4.2.2release_4.0.1ticket-1009ticket-1094-headlessticket-1242-2d-resolutionticket-1243ticket-1249ticket885unittest-saveload
Last change
on this file since 48153283 was
79492222,
checked in by krzywon, 10 years ago
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Changed the file and folder names to remove all SANS references.
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-
Property mode set to
100644
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File size:
1.5 KB
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1 | """ |
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2 | This module is a small tool to allow user to quickly |
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3 | determine the size value in real space from the |
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4 | fringe width in q space. |
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5 | """ |
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6 | from math import pi, fabs |
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7 | _DQ_DEFAULT = 0.05 |
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8 | |
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9 | |
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10 | class KiessigThicknessCalculator(object): |
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11 | """ |
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12 | compute thickness from the fringe width of data |
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13 | """ |
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14 | def __init__(self): |
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15 | |
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16 | # dq value |
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17 | self.deltaq = _DQ_DEFAULT |
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18 | # thickenss value |
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19 | self.thickness = None |
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20 | # unit of the thickness |
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21 | self.thickness_unit = 'A' |
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22 | |
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23 | def set_deltaq(self, dq=None): |
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24 | """ |
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25 | Receive deltaQ value |
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26 | |
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27 | :param dq: q fringe width in 1/A unit |
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28 | """ |
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29 | # set dq |
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30 | self.deltaq = dq |
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31 | |
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32 | def get_deltaq(self): |
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33 | """ |
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34 | return deltaQ value in 1/A unit |
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35 | """ |
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36 | # return dq |
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37 | return self.deltaq |
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38 | |
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39 | def compute_thickness(self): |
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40 | """ |
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41 | Calculate thickness. |
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42 | |
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43 | :return: the thickness. |
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44 | """ |
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45 | # check if it is float |
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46 | try: |
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47 | dq = float(self.deltaq) |
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48 | except: |
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49 | return None |
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50 | # check if delta_q is zero |
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51 | if dq == 0.0 or dq == None: |
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52 | return None |
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53 | else: |
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54 | # calculate thickness |
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55 | thickness = 2*pi/fabs(dq) |
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56 | # return thickness value |
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57 | return thickness |
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58 | |
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59 | def get_thickness_unit(self): |
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60 | """ |
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61 | :return: the thickness unit. |
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62 | """ |
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63 | # unit of thickness |
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64 | return self.thickness_unit |
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