Changeset 2888

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Timestamp:
06/10/10 15:24:14 (20 months ago)
Author:
farhi
Message:

cosmetics: header for D1A instrument example

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2 modified

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  • branches/mcstas-1.x/lib/examples/ILL_D1A.instr

    r2875 r2888  
    1212* %INSTRUMENT_SITE: ILL 
    1313* 
    14 * Simple monochromator Diffractometer for powders (D1A) 
     14* Simple monochromator Diffractometer for powders (D1A), with container/sample 
     15* environment and radial collimator. May simulate a silica phase transition experiment. 
    1516* 
    1617* %Description 
    … …  
    2526*     an anisotropically squashed germanium monochromator focussing a 250 
    2627*     mm high beam onto only 30 mm; 
    27 * a wide choice of wavelengths, from 1.39 Angs to 2.99 Angs, quickly available by 
    28 *   simple rotation of the focussing monochromator; 
     28*   a wide choice of wavelengths, from 1.39 Angs to 2.99 Angs, quickly available by 
     29*     simple rotation of the focussing monochromator; 
    2930*  
    3031* The large monochromator take-off angle means that the diffraction pattern is 
    … …  
    3839* Ge 113 DM=1.712 AA      2.994 
    3940* 
     41* The sample is a powder or a liquid, in a container can, all positioned in an 
     42* Al environment (e.g. cryostat/furnace shield). 
     43* This instrument model does not include the guide. For the 'SiO2' sample, one may  
     44* change the Temperature to simulate a phase transition (for teaching purposes): 
     45*    T[C]        573          1650 
     46*    quartz alpha < quartz beta < melt silica 
     47* 
    4048* Example: mcrun D1A.instr lambda=1.911 
     49*          mcrun D1A.instr -N 10 lambda=1.911 Powder="SiO2" Temperature=300,2000 
    4150* 
    4251* %Parameters 
    … …  
    4453* DM:     [Angs] d-spacing of monochromator. Use DM=0 to compute the values  
    4554*                  from the requested wavelength. 
    46 * powder: [str]  File name for powder description 
     55* powder: [str]  File name for powder description, or S(q) file (extension .qSq) 
    4756* Temperature:[K] Sample temperature, to study phase changes.  
    4857*                   Only applies when Powder is set to SiO2. 
    … …  
    99108  if (Temperature < 573+273) strcpy(Powder, "SiO2_quartza.laz"); 
    100109  else if (Temperature < 1650+273) strcpy(Powder, "SiO2_quartzb.laz"); 
    101   else strcpy(Powder, "SiO2.qSq"); 
     110  else strcpy(Powder, "SiO2_liq.qSq"); 
    102111} else strcpy(Powder,powder); 
    103112 

  • trunk/nlib/examples/ILL_H22_D1A.instr

    r2703 r2888  
    1212* %INSTRUMENT_SITE: ILL 
    1313* 
    14 * Simple monochromator Diffractometer for powders (D1A) installed on H22 
     14* Simple monochromator Diffractometer for powders (D1A) installed on H22, with  
     15* container/sample environment and radial collimator. 
    1516* 
    1617* %Description 
    … …  
    2526*     an anisotropically squashed germanium monochromator focussing a 250 
    2627*     mm high beam onto only 30 mm; 
    27 * a wide choice of wavelengths, from 1.39 Angs to 2.99 Angs, quickly available by 
    28 *   simple rotation of the focussing monochromator; 
     28*   a wide choice of wavelengths, from 1.39 Angs to 2.99 Angs, quickly available by 
     29*     simple rotation of the focussing monochromator; 
    2930*  
    3031* The large monochromator take-off angle means that the diffraction pattern is