LCLS Stripline BPM Overview 

Beam Position Monitors sense the passage of the beam when it induces a signal in the pickup electrodes mounted in the beam waveguide. This induced signal is of low current but can be 10's of volts for several nanoseconds, in synch with the beam's arrival. This signal is put directly on to a high quality coax to the receiving electronics.
In addition to this readback pulse, the stripline BPM system generates a calibration pulse that is sent to the striplines to correct for signal gain variation and drift. This is performed between beam pulses.


LCLS Stripline BPM Processor Engineering Specification (DRAFT)

LCLS BPM Data Acquisition System WPPB40

2022 SLACPAS Steve Smith BPM Talk Slides


LCLS BC1 rectangular BPM, beam left to right


LCLS-II DOG1 BPM, beam left to right

LCLS Cavity BPMs

LCLS-II undulator hall cavity BPM


LCLS-II cavity BPM electronics in Building 913

LCLS Cavity BPM Calibration

LCLS Cavity BPM Receivers Network Information

ATCA BPMs (Stripline)

BPM AMC Card Testing GUI

BPM AMC Card Testing Procedure

2-Slot Crate Procedure & Manual

4-Chan_BPM_Measurements.xlsx

LCLS II BPM-C04 Status List.xlsx

PC_379_396_03_C04

Trello Board

Production BPM's

Vacuum Structure Testing

Linac DTF

Read BPM ATCA Information

Cavity

PC_379_396_13_C04

PC-290-201-14-C01

LCLS_CAVITY_BPM_PLL_BOARD - PC-290-201-15-C03

Cavity BPM Chassis Tracker

Cavity AMC Testing

Insitu Cavity AMC Testing

Cavity BPM Test Procedure

LCLS Cavity BPM Receivers Network Information

VME BPMs

Trouble shooting guide for VME based BPMs

VME Test Stand Overview for BPMs

General Notes

To enable BPM processing when no beam rate

To enable

In IOC console, execute these commands:

cexpsh("-c","fidProcessBypass=(int)1")
cexpsh("-c","fidProcessHasBeam=(int)1")
To disable

In IOC console, execute these commands:

cexpsh("-c","fidProcessBypass=(int)0")
cexpsh("-c","fidProcessHasBeam=(int)0")

OR 

reboot IOC


BPM Ironing
TPR MSGDLY
MORE TO FOLLOW

LCLS-II HE

LCLS-II HE Installation Information Checklist

LCLS-II General

BPM Controls Installation Sharepoint Directory