System: LPPS1/PS1 The Storage Ring orbit correction program now uses XBPMs (X-ray Beam Position Monitors) to assist in plotting a stable orbit. These monitors are placed downstream of LPPS1/PS1; therefore, it requires that LPPS1/PS1 for these beamlines be OPEN whenever there is stored beam, either for studies or for user operations. Any operation of LPPS1/PS1 must go through the FC (Floor Coordinator). If LPPS1/PS1 needs to be closed (e.g. a PSS validation), notify the MCR (Main Control Room) that PS1 for a particular beamline will need to be closed. The request for LPPS1/PS1 closure must be preceded by an approved online work request. These are usually submitted by the PSS group and approved by AES-UES group members. The MCR must approve LPPS1/PS1 closing just prior to its closing. Opening LPPS1/PS1 does not require MCR approval; however, the FC must inform the MCR that this will happen (this is so that the XBPM can be re-inserted into the orbit correction matrix). Emergency or non-scheduled LPPS1/PS1 closure requests must also go through the Floor Coordinator and brought up to the MCR. The MCR will approve or deny the request after reviewing their notification procedures. Issuer: N. Moonier Last Reviewed: 8/25/2025 |