PAC2013 - List of Authors (Watkins, H.A.)

Paper	Title	Page
THPAC26	Analog Front End Design for High Speed Digitizing of Beam Position and Phase Measurements at LANSCE	1199
	H.A. Watkins, J.D. Gilpatrick, R.C. McCrady LANL, Los Alamos, New Mexico, USA
	Funding: Work supported by the U.S. Department of Energy. The Los Alamos Neutron Science Center (LANSCE) is currently developing beam position and phase measurements for its 805-MHz linac as part of the LANSCE risk mitigation project. Beam position and phase monitors (BPPMs) with four shorted striplines have been installed throughout the linac. The BPPM electronics will sample each stripline at 240 MS/s and use a field programmable gate array (FPGA) to calculate position and phase of the beam relative to the linac reference. The beam micro-pulses from each electrode must be filtered and amplified to provide the correct frequency and amplitude level to the digitizer. This paper describes the signal conditioning required to interface LANSCE BPPMs to high speed digitizers, the diagnostic capabilities of the analog front end (AFE) module, digital control of the AFE module and design considerations to meet these objectives.

Paper

Title

Page

Analog Front End Design for High Speed Digitizing of Beam Position and Phase Measurements at LANSCE

1199

H.A. Watkins, J.D. Gilpatrick, R.C. McCrady
LANL, Los Alamos, New Mexico, USA

Funding: Work supported by the U.S. Department of Energy.
The Los Alamos Neutron Science Center (LANSCE) is currently developing beam position and phase measurements for its 805-MHz linac as part of the LANSCE risk mitigation project. Beam position and phase monitors (BPPMs) with four shorted striplines have been installed throughout the linac. The BPPM electronics will sample each stripline at 240 MS/s and use a field programmable gate array (FPGA) to calculate position and phase of the beam relative to the linac reference. The beam micro-pulses from each electrode must be filtered and amplified to provide the correct frequency and amplitude level to the digitizer. This paper describes the signal conditioning required to interface LANSCE BPPMs to high speed digitizers, the diagnostic capabilities of the analog front end (AFE) module, digital control of the AFE module and design considerations to meet these objectives.