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Enhancing Laser Control Efficiency in Antiproton Beam Path Analysis

This article covers the development of a VI for controlling an excimer laser used in producing photoelectrons, aiming to replace inefficient software. The VI's performance is tested against manufacturer software. It discusses deposition of electrons/positrons on a degrader, charge counter calibration, pbar normalizations analysis, and other related projects like creating electrical controls for gate valves.

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Enhancing Laser Control Efficiency in Antiproton Beam Path Analysis

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  1. My work on ATRAP, Part II Steven Moses July 23, 2009 University of Michigan-CERN REU Prof. G. Gabrielse and Dr. J. Wrubel

  2. LabVIEW Programs • Have developed a VI to control the operation of an excimer laser used for producing photoelectrons. • Currently testing this VI and comparing its performance with the software from the manufacturer. • Once this is done, this VI will be used in place of the original inefficient software.

  3. Antiproton beam path Trap Degrader PPAC – Parallel Plate Avalanche Counter PPAC and Energy tuning cell From AD Bending magnets

  4. Calibrating Charge Counters • Electrons or positrons are deposited on the degrader. • Want to calculate the effective capacitance of the charge counter. 100 pF A250 Charge Sensitive Preamp Pulse generator Oscilloscope 50 Ω During calibration, the charge is simulated by converting the pulse from a pulse generator into charge.

  5. Studying pbar normalizations • 3 ways to determine the number of antiprotons per cycle: nexp, PPAC sum, and AD number. It seems as though the ppac shows a good linear relationship to the AD number, while nexp is dependent on experimental conditions.

  6. Other projects • Building a wagon for a vacuum pump. • Fixing a liquid helium dewar level meter. • Creating electrical controls for gate valves.

  7. Questions?

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