- Do we lose the FEL from ACR side -> Check the big FEL property monitor on the wall (if the property monitor is not showing anywhere, type > lclsmap in a terminal to bring it up, or use the control UI: LCLS -> LCLS Map)
- Check the gas detector
- CXI terminal -> cd ~/bin
- Then execute gas_detector_striptool
- Sometimes the gas detector is not working, then try striptool with the PV: HX2:SB1:BMMON:SUM
- It is a photodiode in TXI, “strong back 1”, it is an ancient diode, not wave8
- Sometimes it is more complicated than an ACR call, we need to join their Zoom session for discussion:
- ACR Zoom 99900085245
- Passcode 002151
- Check the gas detector
- Is there an MPS fault that prevents us from getting the beam?
- Fix the issue if there is indeed an issue
- Ask ACR to bypass the fault if we know it should be bypassed, e.g., an item is not physically present
- Is the CXI reference laser mirror IN? -> Should be out, otherwise will trip the FEL
- Is the pulse picker DIA closed? -> Should be open
- Is the MR2L0 HOMs mirror pitch at the right position for CXI to take the beam?
- LFE Home -> mr2l0_homs_pitch
- 0.85 urad is for other hutch, if it’s this value, we should change it back
- 4.949 urad is for CXI at 15 keV (Run 20, need to update this for Run 21 as it has changed after a long down time)
- Is the XCS_YAG3M in? -> Should be OUT when CXI takes the beam.
- In a terminal > xcs to get the XCS master control panel
- Is the XRT mirror (mr1l4_homs_x_up) in for MFX and MEC (they are parallel to CXI, we use the XRT mirror to direct the beam sideways, CXI takes the direct beam)? -> Should be OUT when CXI takes the beam.
- 18500 is the OUT position
- -1900 is the IN position
- We now have a shortcut button for this mirror, in the LCLS tab
- Is the DG2_stopper closed? -> Should be open when CXI takes beam.
NOTE: We now have a hutch python function gp_get_all() to check all relevant status in the beamline, and gp_get_upstream() to check upstream beamline status if we see no FEL.