Beamline startup

To bring the beamline back from a shutdown position, these are some of the things to do:

1. Make sure that air pressure, water supply and return pressure are all non-zero (gauges underneath V8L). Check that flow to LBL mirror reads over 1 gallon/minute (digital gauge under LBL tank)

2. Make sure you have an approved safety form posted. (If you had it pre-approved, it is in the hands of the safety operator. If not, you are out of luck).

3. Check all the vacuum gauges, to make sure that the vacuum is OK, especially if some of the valves got closed. (Compare with weekly status reports). Make sure ion pumps are running. If all OK, open valves.

4. Fill out safety check list, and ask the operations coordinator to open up the front end. (Blank forms are in a sleeve below the ``Green board,'' and they're also available for printing from a separate web page.)

5. Make sure undulator gap is set right. If not, request the proper gap from the control room.

6. Verify entrance and exit slit sizes, wavelength setting, and photodiode reading. Open safety shutter.

7. If there is signal at PD$_{\rm L}$, but not PD $_{\rm STXM}$, either the shutter is closed, or the differential pumping section got bumped, or the LWB mirror is set wrong. Check beam on phosphor at upstream side of exit window.

8. If there is signal at PD$_{\rm STXM}$, but no counts in PC, check the alignment of the snout, PC HV, and gas flow to counter. Counter may also be misaligned, or sample may be blocking the beam.

9. Check to see that feedback is on. (If not, contact control room).