First-order beam dynamics and RF parameters for the PSR short-bunch ("pulse-stacking") mode

Technical Report · Thu Jan 12 04:00:00 EST 2012

DOI:https://doi.org/10.2172/1060895· OSTI ID:1060895

Jason, Andrew J. ^[1]

---

1. Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)

Here we mainly discuss the longitudinal ring beam dynamics and RF control for the bunching needed to maintain the short (a few nanoseconds) proton pulses required by the Weapons Neutron Research Center (WNR) for measurement of neutron cross sections and reaction dynamics, as specified in the recent upgrade proposal known as “Pulse Stacking.” Single micropulses, each containing 6x10⁸ protons, are to be delivered to the Proton Storage Ring (PSR) from the LANSCE linac and successively overlaid in from 1 to 4 RF buckets per ring turn until a maximum number of particles in the bucket is achieved. This is distinct from the currently used long-pulse mode in which the bucket equals the ring circumference and a 201-MHz micropulse stream is injected at each turn to fill ¾ of the bucket to obtain pulses ~270 ns long.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE National Nuclear Security Administration (NNSA)
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 1060895
• Report Number(s): LA-UR--13-20497
• Country of Publication: United States
• Language: English

Related Subjects

Accelerator Design, Technology, and Operations
Particle Accelerators