Front End Equipment Protection System (EPS) Fault Reset Procedure:

In the event that FE-EPS trips, Floor Coordinators are allowed to reset the system if the fault occurred as a result of a User vacuum fault, or PS1 closure due to a fault downstream of PS1. If the fault occurred on a differentially pumped (windowless) beamline follow the steps outlined here:

Valve Openings in Differential Pressure (DP) BM and ID Front End Beamlines.

If the fault caused the FE-EPS to dump the Storage Ring, see:

FE-EPS Trip causing storage ring dump during User Beam and Machine Studies

In the case that the fault did not cause the Storage Ring to dump, DETERMINE THE REASON FOR THE FAULT. If the cause cannot be found, initialize a call-in to the Vacuum Technology engineer before attempting to reset the fault.

PSS/EPS/Vacuum fault

  1. The floor coordinator will advise both the vacuum group and the PSS group on-call engineer.
  2. The vacuum group engineer will attempt to solve the problem from home. If appropriate, he can call the vacuum group on-call tech to come in to fix the problem (i.e., cylinder blow-by) with support also provided by PSS. We will operate by a "30 minute resolve or in" rule. If the problem cannot be resolved from home, the on-call vacuum engineer and on-call PSS engineer will come in. (Understand that an acceptable resolution is that the problem can "wait til morning" if in the judgement of the floor coordinator that is ok in this situation.)
  3. While people are in transit, the floor coordinator will obtain the required CCSM/management approval if work is to be done on a safety critical component. An online work request is to be submitted, however verbal approval is acceptable for a call-in situation; work shall not begin until such approval is given.
  4. The floor coordinator will also inform the MCR of the situation.
  5. The Vacuum group will now replace pneumatic solenoids in the PSS equipment box if necessary.
  6. Everyone performing work in such a situation will remain until check out and approval of the work is completed.

Water fault

  1. The floor coordinator will contact the Mechanical Engineering Group using the ASD/ME Call-In List for Front End and Beamline Water Systems.

FINAL NOTE: the Front End EPS system is directly tied in to the Machine Protection System (MPS) of the Storage Ring. Any problem upstream of or PS1 itself will result in a beam dump. In order to restore the beam, diagnose the problem and make appropriate call-ins so that repairs can be made. Taking a beamline offline cannot rectify this problem.

M. Ramanathan, 02/5/01

R. Salazar, revised 09/11/02

R. Salazar, revised 02/17/03

K. Beyer, revised 12/08/03

P. Fernandez, revised 06/07/04