PAC2013 - List of Authors (Bjorklund, E.)

Paper	Title	Page
MOPMA15	Experimental Results from a "Diagnostic" Pulse for Single-Particle-Like Beam Position Measurements during Accumulation/Production Mode in the Los Alamos Proton Storage Ring	330
	J.S. Kolski, E. Björklund, M.J. Hall, M.P. Martinez, F.E. Shelley LANL, Los Alamos, New Mexico, USA
	Beam position monitors (BPMs) are the diagnostic most used in setting up and documenting the Los Alamos Proton Storage Ring (PSR). One-turn injection can be approximated as single-particle injection with initial betatron position and angle (x0 and x0’). The turn-by-turn beam position data from single-turn injection allows measurement of the betatron tune, closed orbit (CO), and injection offset (x0 and x0’ at the injection point). In accumulation mode, many turns are injected into the ring, the transverse phase space is quickly filled, and there is no coherent betatron motion. The injection offset, which determines the accumulated beam size and is very sensitive to steering upstream of the ring, is not measurable during accumulation. We review our approach for measuring the injection offset during accumulation, focus discussion on recent experimental results, and compare measurements of the betatron tune, CO, and injection offset in single-turn injection mode and in a “diagnostic pulse” mode.

Paper

Title

Page

Experimental Results from a "Diagnostic" Pulse for Single-Particle-Like Beam Position Measurements during Accumulation/Production Mode in the Los Alamos Proton Storage Ring

330

J.S. Kolski, E. Björklund, M.J. Hall, M.P. Martinez, F.E. Shelley
LANL, Los Alamos, New Mexico, USA

Beam position monitors (BPMs) are the diagnostic most used in setting up and documenting the Los Alamos Proton Storage Ring (PSR). One-turn injection can be approximated as single-particle injection with initial betatron position and angle (x0 and x0’). The turn-by-turn beam position data from single-turn injection allows measurement of the betatron tune, closed orbit (CO), and injection offset (x0 and x0’ at the injection point). In accumulation mode, many turns are injected into the ring, the transverse phase space is quickly filled, and there is no coherent betatron motion. The injection offset, which determines the accumulated beam size and is very sensitive to steering upstream of the ring, is not measurable during accumulation. We review our approach for measuring the injection offset during accumulation, focus discussion on recent experimental results, and compare measurements of the betatron tune, CO, and injection offset in single-turn injection mode and in a “diagnostic pulse” mode.