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---
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---
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## Coming out of shutdown:
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___
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# content
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- [coming out of shutdown](#coming out of shutdown)
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- [energy calibration](#energy calibration)
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- [align M3R pitch to center of rotation](#align m3r pitch to center of rotation)
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- [determine kth_offset](#determine kth_offset)
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- [align M4R pitch to center of rotation](#align m4r pitch to center of rotation)
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- [determined kap offset](#determined kap offset)
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- [determined kphi and phi 0](#determined kphi and phi 0)
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___
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## coming out of shutdown
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1) home motors using procedure in [elog](https://logbook.xray.aps.anl.gov/29id/RSXS+Endstation/44)
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2) check tth minimum/maximum allowed position in extended panel (PI software): after homing tth PI/dial position will be set to either of those, which will prevent it to move it in that direction
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3) sync EPICS values:
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| ... | ... | @@ -23,7 +38,7 @@ Scan_D5D() |
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Scan_Slit3D_center()
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```
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---------------------------------------
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## Energy calibration:
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## energy calibration
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Good to check after a shutdown:
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1) use C branch to check mirrors alignment (M0,M1,M2,GRT) and energy drift accross beamline energy range.
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2) Use STO/Si/LAO sample to measure XAS and change M3R roll (coarse) and/or slit (fine) center to refine energy calibration:
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| ... | ... | @@ -34,7 +49,7 @@ Good to check after a shutdown: |
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---------------------------------------
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## Align M3R pitch to center of rotation:
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## align M3R pitch to center of rotation
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1) start from the last known value for M3R pitch ie desired pixel value (typically betwen 110-115)
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2) align direct beam on d4 and reset tth0:
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```python
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| ... | ... | @@ -72,7 +87,7 @@ note: you can do this a th=0 or th=180 (align_z0 or align_z180), depending on wh |
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---------------------------------------
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## Determine kth_offset:
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## determine kth_offset
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If th_0 and th_180 is the motor position at specular near th=15 and th=165, respectivaley (eg th0=13.671 and th180=163.65):
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```python
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| ... | ... | @@ -83,7 +98,7 @@ With th motor at 0, the actual value is Offset: mvth(Offset), then reset kth dia |
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---------------------------------------
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## Align M4R pitch to center of rotation:
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## align M4R pitch to center of rotation
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1) move to th=90, chi=0, phi=90
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2) find z:
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| ... | ... | @@ -124,7 +139,7 @@ align_z0_chi0() |
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---------------------------------------
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## Determined kap offset:
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## determined kap offset
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1) compare kap scans at (th,chi,phi) = (90,0,90) and (270,0,-90):
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| ... | ... | @@ -139,7 +154,7 @@ dscankap(-4,4,0.1) |
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---------------------------------------
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## Determined kphi/phi 0:
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## determined kphi and phi 0
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<ol>
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<li>
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| ... | ... | |
