The procedure to align E and I stations after a beam fill is:
- Check that the undulator gap has returned to its nominal value (see http://8id.xor.aps.anl.gov/elog/8-ID/16)
- Check that the A shutter (FE shutter) has re-opened (should occur automatically via Auto shutter open control)
- Wait 30 minutes for mirror equilibration (eff. Oct. 2005 this is probably no longer necessary or certainly not for 30 minutes but still needs to be investigated carefully)
- From 8-ID-I station spec, follow the procedure in the align_mirror macro:
| Quote: |
def align_mirror '
print "Moving relevant motors to align the mirror t2fine"
umv si1hgap 250.0;umv si1vgap 250.0;
umv si1hcen 1250;
print "moving diamond crystal(E station) out of the beam"
do_sleep(2);
umvr diamx -1;
print "Moving PIN diode (before shutter and att) into the beam"
umv pind1z 11.0;
#shutteroff;att 0;
counters -1 1;plotselect pind1;ct 1;
printf("Counts on PIND1 before alignment = %f",S[pind1])
do_sleep(5);
#lup ta2fine -30 30 30 1;
#umv ta2fine CEN;ct;
lup ta2_rot -.005 .005 25 1;
umv ta2_rot CEN;ct;
#If max. counts is not attained, tw ta2_rot .00025 till you get the counts
#beep;beep;beep;beep;
#print "(umv si1hcen 1500) and (umvr diamx 1) and (umv pind1z 25) and (plotselect pind1)"
'
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To restore pin diodes, slits, ..., back to their nominal starting position after mirror alignment, follow the procedure listed in the 'restore_mirror' spec macro:
| Quote: |
def restore_mirror '
umv si1hcen 1500;
umvr diamx 1;
lup diamx -.5 .5 20 1;
att 15;shutteron;
print "Moving PIN diode out of the beam"
umv pind1z 25.0;
counters -1 3;
plotselect pind3;
'
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