Large dynamic range small-angle diffractometer D22

Small-angle scattering is a technique that measures the deviation to small angles (much less than one degree to several degrees) of an X-ray or neutron beam due to structures of small size in the sample. “Small” means dimensions of a few tenths to about 100 nanometres, such as clusters in alloys, polymers, or biological macromolecules.

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D22 Manual

3.3. D22 run parameters stored with data

MAD stores certain parameters with the data. This document shows a list of them.

For other information, refer to the D22 Manual and to the D22 documentation.


  

 parameters defined by Ron Ghosh

 values chosen for LAMP

   1

 contents of PRESET 1 (1/100 s if time)

 x

   2

 contents of PRESET 2 (generally not used)

 x

   3

 time [1/10 s] scaler 1

 x

   4

 total detector counts (scaler 2)

 (not necessary for LAMP)

   5

 total monitor counts (3)

 x (but this one)

   6

 total number of selector revolutions (4)

 

   7

 total number of chopper revolutions (5)

 

   8

 

 

   9

 

 

  10

 

 

  11

 

 

  12

 

 

  13

 

 

  14

 

 

  15

 detector angle (calc.) [deg.]

 x

  16

 coder 1: beamstop pos. By [mm]

 x

  17

 coder 1: beamstop pos. Bx [mm]

 x

  18

 c. 3: sample changer/translat. STR [mm]

 x

  19

 c. 4: detector distance DET (read) [m]

 x

  20

 selector speed [1/min] (last)

 

  21

 chopper 1 speed [1/min]

 

  22

 chopper 2 speed [1/min]

 

  23

 digital voltmeter channel 1

 

  24

 digital voltmeter channel 2

 

  25

 selector type (1., 2. etc.)

 

  26

 sample-detector distance (calc.) [m]

 x

  27

 run sequence: cycle

 

  28

 run sequence: serial

 

  29

 temperature set point [K]

 

  30

 regulation temperature [K]

 

  31

 sample temperature [K] (last)

 x

  32

 temperature control off/on (0./1.)

 

  33

 value of IEEE-1 at start

 x

  34

 value of IEEE-1 at end

 x

  35

 ... further IEEE values

 

  36

 

 

  37

 

 

  38

 

 

  39

 

 

  40

 

 

  41

 

 

  42

 

 

  43

 

 

  44

 

 

  45

 

 

  46

 

 

  47

 

 

  48

 

 

  49

 

 

  50

 

 

  

 further parameters stored with the data

 

  51

 beam centre address X0 [cell#]

 x

  52

 beam centre address Y0 [cell#]

 x

  53

 wavelength []

 x

  54

 relative wavelength resolution

 x

  55

 detector pixel size x [mm]

 x

  56

 detector pixel size y [mm]

 x

  57

 alarm status no alarm/alarm 0/1

 

  58

 collimation [m]

 x

  59

 attenuator type (1., 2. etc.)

 

  60

 attenuator out/in (0./1.)

 

  61

 detector angle (read) [deg.]

 x

  62

 detector translation (read) [mm]

 x

  63

 selector angle [deg.]

 x

  64

 sample distance [mm]

 x

  65

 sample rotation [¡]

 x

  66

 changer position #

 x

  67

 sample height [mm]

 x

  68

 source ap. left [mm]

 

  69

 source ap. right [mm]

 

  70

 source ap. lower [mm]

 

  71

 source ap. upper [mm]

 

  72

 source ap. distance [m]

 

  73

 sample aperture hor. /diam. [mm]

 

  74

 sample aperture vert. or 0. [mm]

 

  75

 beamstop width or diameter [mm]

 

  76

 beamstop height or 0. [mm]

 

  77

 ISUM X1 [cell #]

 

  78

 ISUM X2 [cell #]

 

  79

 ISUM Y1 [cell #]

 

  80

 ISUM Y2 [cell #]

 

  81

 shear speed [1/min]

  x

  82

 magnetic field [Tesla]

 

  83

 pressure [Pa]

 

  84

 reactor power [MW]

 

  85

 TOF: # of channels

 

  86

 TOF: delay [ms]

 

  87

 TOF: channel width [ms]

 

  88

 TOF: channel increment factor

 

  89

 preset flag mon./time (0/1)

 

  90

 TOF: # of current frame

 

  91

 data file version number

 

  92

 iris position #

 

  93

 ADC1

 

  94

 ADC2

 

  95

 ADC3

 

  96

 ADC4

 

  97

 DAC1

 

  98

 DAC2

 

  99

 DAC3

 

 100

 DAC4

 

 101

 Sample table translation (TTR) [mm]

 

 102

 Sample goniometer angle (CHI) [deg.]

 

 103

 Ampere (magnet power supply)

 

 104

 Voltage (magnet power supply)

 

 105

 TOF/kin current channel start time

 

 106

 Flipper frequency

 

 107

 Flipper amplitude

 

 108

 Flipper pickup

 

 109

 Polarisation

 

 110

 TOF/kin current channel centre (time)

 

 111

 Current of (new) power supply 1 (Amp1)

 

 112

 Voltage of power supply 1 (Volt1)

 

 113

 Current of (new) power supply 2 (Amp2)

 

 114

 Voltage of power supply 2 (Volt2)

 

 115

 Current of (new) power supply 3 (Amp3)

 

 116

 Voltage of power supply 3 (Volt3)

 

 117

 Magnet Frequency (AW)

 

 118

 Magnet Amplitude (AW) (Volt)

 

 119

 

 

 120

 

 

 121

 

 

 122

 

 

 123

 

 

 124

 

 

 125

 

 

 126

 

 

 127

 

 

 128

 

 

(ast update of table: 01-Dec-2006)

distribution: Stuart Caunt, Bob Cubitt, Bruno Deme, Charles Dewhurst, Giovanna Fragneto,
Ron Ghosh, Isabelle Grillo, Hans Lauter, Peter Lindner, Roland May, Ralf Schweins, Peter Timmins


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