This page will contain the motor lists for the beamlines

The tables below show the various motors accessible via spec for the optics of ID14-4 in OH2 and the experiment in EH4. Links go from the motor names to the pages describing the optical element (where it exists).

1. The Optics Hutch

The first table refers to the motors used to move the optical elements in OH2. The motors are listed inarbitrary order.

 

Motor Name in spec ('oh2' on artemis)

Function

Callibrated

Useful Increments/values

Comments

tmainy

Translation of the monochromator Si-xtals to move 111 in (tmainy=22.74) or to move the 311 in (tmainy=79.08)

 


Keep fixed on 22.74

Don't use

tmainz

?

 


 

Don't use

qga

Piezo crystal for r2theta or r2gamma

-

-

Used by feedback-system

qgb

Piezo crystal for r2gamma or r2theta

-

-

Used by feedback-system

ss1f

Slits before mono, front blade

mm

0.1mm

Used to reduce heatload mono

ss1b

Slits before mono, back blade

mm

0.1mm

Used to reduce heatload mono

ss1d

Slits before mono, down blade

mm

0.1mm

Used to reduce heatload mono

ss1u

Slits before mono, up blade

mm

0.1mm

Used to reduce heatload mono

ss1vg; ss1vo

Pseudo-motors for the slits before the mono: vertical gap and offset

mm

Good value is 2 mm

Close ss1vg to 0.3 and do a dscan on ss1vo –1.5 1.5 20 1 with plotselect I4 to determine best position

ss1hg; ss1ho

Pseudo-motors for the slits before the mono: horizontal gap and offset

mm

Good value is 3 mm

Close ss1hg to 0.3 and do a dscan on ss1ho –2 2 20 1 with plotselect I4 to determine best position.

mvb; mvin; mvout

Vertical positioning legs for the toroidal mirror: mvb back of mirror; mvin closest to storage ring at mirror end; mvout furthest from ring at mirror end

 


0.01mm

 

mhgt

Pseudo-motor for mirror height

mm

0.04mm

Only motor of mirror you could try to move. Use a maximum of 3x40 mu steps

mxtilt

Pseudo mtor of mvin/mvout giving a roll around the X-rays for the mirror

radians

 

To be installed and tested

mytilt

Pseudo mtor of mvf/mvin/mvout giving the glancing angle of X-rays to the mirror

radians

 

To be installed and tested

myawf; myawb

Translation horizontally of the mirror

mm

 

Rarely moved

myaw

Pseudo-motor of myawf/myawb for the yaw of the mirror

radians

0.01

Tweaked once a run or so; focus very sensitive to yaw position

mtrans

Pseudo-motor of myawf/myawb for the horizontal translation of the mirror

mm

 

To be installed and tested

atten1; atten2; atten3

Three rows of attenuator

none

 

Use gui if you like to use the attenuators in the white beam. Currently disabled