SINAP, Shanghai, People's Republic of China
URS, Albuquerque, New Mexico, USA
LANL, Los Alamos, New Mexico, USA
Implementing high-quality measurement systems in large test environments presents a number of unique challenges. And, these challenges are made even more interesting where new instrumentation systems are being implemented in existing legacy environments where there is little opportunity to modify the infrastructure. Often, Electromagnetic Interference (EMI) is encountered. This interference may be simply an annoyance were sufficiently low that data integrity is not severely compromised, but in many cases, perhaps most, EMI is so severe as to totally obscure the signals of interest. Various sources of EMI and common points of entry of are reviewed. Means of mitigation of EMI in the design and implementation of instrumentation systems in legacy environments are presented. Common sources of EMI potentially introduced by the instrumentation systems themselves are examined, and means of design to mitigate such self-induce interference are examined. Real-life examples are provided to demonstrate the EMI issues, and the affect of mitigation. It’s all about the current – pretty much!
LANL, Los Alamos, New Mexico, USA
The Los Alamos Neutron Science Center (LANSCE) is currently developing beam position and phase measurements (BPPMs) as part of the LANSCE risk mitigation project. BPPM sensors have been installed in the 805-MHz linac and development of the monitoring electronics is near completion. The system utilizes a high speed digitizer coupled with a field programmable gate array (FPGA) mounted in a VPX chassis to measure position, phase and intensity of a variety of beam structures. These systems will be deployed throughout the LANSCE facility. Details of the hardware selection and performance of the system for different timing structures are presented.