A DSP-Based Beam Current Monitoring System for Machine Protection Using Adaptive Filtering

Conference · Fri Jun 01 00:00:00 EDT 2001

DOI:https://doi.org/10.1109/PAC.2001.987368· OSTI ID:783613

Musson, J; Dong, H; Flood, R; Hovater, C; Hereford, J

The CEBAF accelerator at Jefferson Lab is currently using an analog beam current monitoring (BCM) system for its machine protection system (MPS), which has a loss accuracy of 2 micro-amps. Recent burn-through simulations predict catastrophic beam line component failures below 1 micro-amp of loss, resulting in a blind spot for the MPS. Revised MPS requirements target an ultimate beam loss accuracy of 250 nA. A new beam current monitoring system has been developed which utilizes modern digital receiver technology and digital signal processing concepts. The receiver employs a direct-digital down converter integrated circuit, mated with a Jefferson Lab digital signal processor VME card. Adaptive filtering is used to take advantage of current-dependent burn-through rates. Benefits of such a system include elimination of DC offsets, generic algorithm development, extensive filter options, and interfaces to UNIX-based control systems.

• Research Organization: Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Energy Research (ER) (US)
• DOE Contract Number: AC05-84ER40150
• OSTI ID: 783613
• Report Number(s): JLAB-ACE-01-01; DOE/ER/40150-1866; TRN: US0104023
• Resource Relation: Journal Volume: 3; Conference: PAC 2001, Chicago, IL (US), 06/18/2001--06/22/2001; Other Information: PBD: 1 Jun 2001
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ALGORITHMS
BEAM CURRENTS
CEBAF ACCELERATOR
CONTROL SYSTEMS
BEAM MONITORS
EQUIPMENT PROTECTION DEVICES
DESIGN
OPERATION