Beam profile wire-scanner/halo-scraper sensor analog interface electronics
- James F.
- Dean S.
- Lisa A.
- John Douglas
- Matthew W.
- Derwin G.
The halo experiment presently being conducted at the Low Energy Demonstration Accelerator (LEDA) at Los Alamos National Laboratory utilizes a generally traditional wire scanner for measurement of the beam core profile and a graphite scraper for measurement of the tails of the beam distribution. A lossy integrator is used to detect the replacement charge flowing to the wire and scraper. Independent programmable dc-bias voltages are applied to the wire and the scraper through the analog electronic interface to optimize charge capture from the two sensors. A programmable guard voltage is applied to isolate the scraper from the resistivity of the cooling system. Programmable gain provides a total dynamic range in the analog electronics of greater than about one part in 10{sup 6}. The analog signal is digitized to 14 bits plus sign, and the equivalent input noise is nominally 30fC.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 975344
- Report Number(s):
- LA-UR-01-2912; TRN: US1002432
- Resource Relation:
- Journal Volume: 3; Conference: "Submitted to: 2001 Particle Accelerator Conference, Chicago, IL, June 18-22, 2001."
- Country of Publication:
- United States
- Language:
- English
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Final mechanical design, fabrication, and commissioning of a wire scanner and scraper assembly for halo-formation measurements in a proton beam
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