Computers
The most important motors

 

Computers

 

galilee: This is the experiment control computer. It runs the experiment control program FOURC. The third workspace should be utilised to prepare macros to run a suite of IXS scans. The last workspace should have two panels open. One for editing the routine output CPLOT macro, and the second window to execute the macro.

You should not attempt to start more applications or do whatsoever what is the scope of this computer in order to avoid any potential overloading of this most crucial computer.

brahe: This is the data analysis computer. An image of the data files on galilee are automatically created on brahe. This serves as a back-up, and allows to work on-line with the data. Here newplot and sqwadd are running as well as the relevant fitting programs.

Experiment control computer: galilee
login: opid28
password: tonic28
working directory: /data/runN_YY/HS_ABCD

Data analysis computer: brahe
login: opid28
password: tonic28
working directory: /experiments/hsabcd

id28pca: This computer runs the beamline control applications such as the Front-End application and the Vacuum application. Nothing else should be running on this computer!!!

Armstrong: This PC is dedicated to the recording and diagnostics of focal spot images and the SensiCam images for crystal alignment purposes (see separate manual).

Keppler: This PC is located in CC3 and should be utilised for further data display such as stacks of IXS scans, dispersion curves etc.

 

 

The most important motors

 

 

General control motors

mono

[degree]; main theta axis of channel-cut premonochromator. This is usually set, and needs only to be tweaked, if the ratio imirr/pmoni is not ok (see further below).

roty 		[mdeg]; mirror angle. This needs to be tweaked, if the intensity ratio ione/imirr (or ione/izero) is not ok (see further below).

 

Motors for four-circle operation and optional additional motors

 

tth [deg]; 2-theta arm of spectrometer; operates only towards positive angles
th [deg]; sample rotation around vertical axis; + cw (birds view)

chi 		[deg]; sample rotation around incident beam axis for th = 0; + cw looking towards undulator source
phi [phi]; sample rotation perpendicular to incident beam axis at th = 0; + cw looking towards ring wall
sax [mm]; sample translation along beam direction for th = 0; + away from spectrometer
say [mm]; sample translation perpendicular to beam direction in horizontal plane; + towards ring wall
saz [mm]; sample translation vertical; + upwards tiltz [deg]; sample rotation around vertical axis for chi = phi = 0, redundant with th; + cw (birds view)
adth [deg]; Huber 410, sample rotation around vertical axis, if chi = phi = 0. Not always mounted on the experiment.

 

Additional necessary motors

 

sho [mm]; horizontal offset of slit system defining beam size on sample
shg [mm]; horizontal gap of slit system defining beam size on sample
svo [mm]; vertical offset of slit system defining beam size on sample
svg [mm]; vertical gap of slit system defining beam size on sample
wheel [deg]; Attenuation wheel, increasing attenuation with increasing motor position: 45, 90, 135, 180, 225, 270 315. No attenuation: wheel 0.
bmstop [mm]; beamstop to be installed behind sample chamber.

ssy		 [mm]; + towards experimental hall. Horizontal translation spectrometer entrance pinhole. It has to be aligned carefully before each experiment
ssz [mm]; vertical translation of entrance pinhole; + upwards.
as1ho [mm]; horizontal offset of analyser slits for ana#2
as1hg [mm]; horizontal gap of analyser slits for ana#2
as1vo [mm]; vertical offset of analyser slits for ana#2
as1vg [mm]; vertical gap of analyser slits for ana#2