Configuration

DM,DA

Monochromator/Analyser d-spacing [Angstroem].

SM,SS,SA

Scattering sense at Mono (new: as text LEFT/RIGHT/STRAIGHT)

FX

new as text: KI or KF

AS,BS,CS

unit cell constants [Angstroem]

AA,BB,CC

unit cell constants [degrees]

AX,AY,AZ

Components of a recip. lattice vector in scattering plane of the sample. A3 is the angle between KI and (AX,AY,AZ).

BX,BY,BZ

Components of a second distinct recip. lattice vector in scattering plane.

informational only:

ALF1,ALF2,ALF3,ALF4

Horizontal collimation before mono, before sample, before analyser, before detector [minutes FwHm]

BET1,BET2,BET3,BET4

Vertical collimation before mono, before sample, before analyser, before detector [minutes FwHm]

ETAM,EATS,ETAA

Monochromator/Sample/Analyser mosaic [minutes FwHm]

Limits and Zeros

Lower and upper limits and zeros for all motors. L, U and Z are appended as a prefix to the variable names to indicate Lower limit, Upper limit and Zero.

Motors

A1      Monochromator angle             (Bragg angle in degrees)
A2      Scattering angle at mono.       (twice Bragg angle in degrees)
A3      Sample angle (degs)             (A3=0 when (AX,AY,AZ) is along KI)
A4      Scattering angle at sample      [degrees]
A5      Analyzer angle                  (Bragg angle in deg.)
A6      Scattering angle at analyzer    (twice A5 in deg.)

        SINQ Instruments:
MCV     Mono curvature vertical
SRS     Sample table second ring
ACH     Anal curvature horizontal
MTL     Mono   lower translation
MTU     Mono   upper translation
STL     Sample lower translation
STU     Sample upper translation
ATL     Anal   lower translation
ATU     Anal   upper translation
MGL     Mono   lower goniometer         (Reserved)
MGU     Mono   upper goniometer
SGL     Sample lower goniometer
SGU     Sample upper goniometer
AGL     Anal   lower goniometer         (Reserved)
AGU     Anal   upper goniometer

D1T D1B D1R D1L Diaphragm 1 (top/bottom/right/left)
D2T D2B D2R D2L Diaphragm 2 (top/bottom/right/left)
D3T D3B D3R D3L Diaphragm 3 (top/bottom/right/left)

Virtual motors

EI      Incident neutron energy         [meV]
KI      Incident neutron wavevector     [Angstroem-1]
EF      Final neutron energy            [meV]
KF      Final neutron wavevector        [Angstroem-1]

QH  -\
QK    +--  Components of Q in Reciprocal Lattice Units [R.L.U.]
QL  -/

EN      Energy transfer; +ve neutron energy loss        [meV]
QM      Length of Q                             [Angstroem-1]

Polarisation analysis

IF1V IF1V and IF2V are currents [Amps] in the vertical-field IF2V coils for Flipper 1 and Flipper 2. IF1H Horizontal-field currents are KI*IF1H for Flipper1 and IF2H KF*IF2H for F2. HELM Angle between axis of Helmholtz pair one and KI. F1 -\ Status of flippers one and two; these variables take the F2 -/ values ON or OFF.

Currents

I1   -\
I2     \
I3      +--  power supply current values [[Amps]
 .      /
I11  -/

HX   -\     Components of Helmholtz fields at sample in Oersteds.
HY     +--  HX is parallel to Q and HY is perpendicular to Q in
HZ   -/     the scattering plane.

Increments Variables

For all motors, virtual motors, currents and field the identifier for the step used with a SCan command is obtained by prefixing the variable name with the letter D.