[BTeam] Injector BPMs (an observation)

[Christopher Tennant]

Hi all,

Not sure if this is of interest to anyone, but just wanted to throw it out there...

For a recent SBIR project we (Brian, Daniel, Reza and I) collected and analyzed data from the injector. Specifically, last fall we varied beamline components (solenoids, correctors, RF gradients) and recorded the downstream response (BPMs, BCMs, BLMs, vacuum). I'm sharing the results of analyzing the BPM data which is in the attached slides.

slide 1: For this portion of the beam studies correctors were varied and the downstream response recorded. What is plotted here is the horizontal (top) and vertical (bottom) BPM readings after the corrector being varied has been returned to its default value. That is, each marker in these plots represents the injector with the exact same corrector settings. (Note, the BPMs were allowed to settle, and an average reading was taken). The extent of the vertical smear at each BPM displays the system reproducibility (or lack thereof).

slide 2: This represents an alternate way to view the information from slide 1. Here the standard deviation of the measurements at each BPM are plotted.

I was rather surprised by these results, though perhaps for those more familiar with operations, this is expected (?).

--chris
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