Effect of Beam Motion on Observed Image at Imaging Station C

Technical Report · Fri Jan 17 04:00:00 EST 2014

DOI:https://doi.org/10.2172/1115549· OSTI ID:1115549

Schulze, Martin E. ^[1]

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

Imaging Station C on the DARHT II accelerator is used to measure beam spot sizes. Solenoid scans are used to measure the spot sizes as a function of the solenoid current and infer the beam emittance. Beam motion is observed during the measurement window and can contribute to the measured spot size. The effect of beam motion on the observed images at Station C is examined in this note. The variation in the beam position during the kicked beam pulse contributes to the beam spot size as measured at Station C. The beam motion is primarily in the vertical plane and is due to the kicker voltage rise time prior to the solenoid magnet. The effect of beam motion on the spot size is studied using LAMDA. From the measured beam position at BPM28 and BPM29 we determine the beam position and angle at the start of the LAMDA simulation. We then calculate the beam motion at Station C as a function of the S4 solenoid magnet current. The shot-to-shot variation in the beam motion is very small.

• Research Organization: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC52-06NA25396
• OSTI ID: 1115549
• Report Number(s): LA-UR--14-20325
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
beam motion beam size measurement emittance