Background • FEEPS Function: to protect the Front End • Implication for Users: cannot take beam while FEEPS is tripped • Purpose of Instructions • Define conditions required for reset • Explain the reset process
Scope • Conditions for reset by FC or Operator • The fault did not cause a beam dump AND • The fault was caused by user vacuum OR • The fault was caused by a FE vacuum fault downstream of PS1
How will you be notified when there is a FEEPS fault? • A user will call 2-0101. • We had a vacuum trip. • Can you open our FEV? • Our BIV is closed. • I can’t open my shutter.
Step 1: Gather Information • If the user hasn’t already told you, ask if he/she knows what caused the fault. • Often, the user mentions beamline vacuum work or suspected outgassing.
Step 2: User BLEPS Reset • Ask the user to reset the Beamline EPS (BLEPS). • Often necessary before FEEPS will reset. • User may need to call beamline contact for assistance.
Step 3: Window? • Determine whether the beamline has a commissioning/ beryllium window. Figure 1: Path to FEEPS screen. The commissioning window is circled in blue.
Steps 4, 5, 6: Reset • The FC or Operator may attempt to reset the FEEPS. • Open controls • Click “Reset” • Open FEV/BIV Figure 2: Path for resetting FEEPS
Note: Fault indicators Note: Legend Note: Status of FE components Step 7: Screen Specifics
Step 8: Check Ion Pumps • All but one ion pump should be in the 10-9 range or less.
IP1:_______ IP2:_______ IP3:_______ IP4:_______ IP5:_______ IP6:_______ IP7:_______ IP8:_______ IP9:_______ Step 8 (continued) 9-BM • Differences between BM and ID beamlines: 9 ion pumps vs. 7 9-ID
Step 9: RGA • Check beamline RGA • Pressure range 10-9 or less Beamline RGA:_____
Step 10: Reset • If pressure conditions in steps 8 and 9 are satisfied, reset the fault and open the FEV and BIV. • Steps 4-7 • If not, contact the Vacuum Group on-call engineer.
Step 11: In case of difficulty • If a FEEPS fault does not reset or occurs more than 3 times per shift, contact the vacuum on-call engineer. • File an RMD report. • If call-ins are necessary, notify the on-call Floor Coordinator. • When in doubt, the Operator is always welcome to call the on-call Floor Coordinator for assistance in troubleshooting.
Step 12: Manual Reset • When EPICS is not working • Computer communications problem • Beamline is too new ES102
Step 13: Documentation • Document the occurrence in the shift log. • Time • Beamline • Vacuum readings that were checked for windowless beamlines (ion pumps, RGA) • Whether the fault reset without difficulty or required further action
Other Information • Occasional User Requests: • Close the FEV or BIV manually in preparation for beamline vacuum work • Open the FEV or BIV after vacuum work, when there is no FEEPS trip • Floor Coordinators and Operators are permitted to grant such requests.
No FEEPS Fault? Legend ACIS: Global online, shutter status ID: Gap in mm Front End: EPS, MPS, DIW, VAC Positions: SV, FEV, BIV, PS1 Beamline: VAC, PER APS Enable: A, B, C, D, E (stations) PSS Fault 2-BM: Typical FEEPS fault; also a PSS fault. 8-BM, 9-BM: BLEPS fault only.