My work on ATRAP, Part II
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My work on ATRAP, Part My work on ATRAP, Part II II Steven Moses Steven Moses July 23, 2009 July 23, 2009 University of Michigan-CERN REU University of Michigan-CERN REU Prof. G. Gabrielse and Dr. J. Prof. G. Gabrielse and Dr. J. Wrubel Wrubel
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My work on ATRAP, Part II. Steven Moses July 23, 2009 University of Michigan-CERN REU Prof. G. Gabrielse and Dr. J. Wrubel. LabVIEW Programs. Have developed a VI to control the operation of an excimer laser used for producing photoelectrons. - PowerPoint PPT Presentation
Transcript of My work on ATRAP, Part II
My work on ATRAP, Part IIMy work on ATRAP, Part II
Steven MosesSteven MosesJuly 23, 2009July 23, 2009
University of Michigan-CERN REUUniversity of Michigan-CERN REUProf. G. Gabrielse and Dr. J. WrubelProf. G. Gabrielse and Dr. J. Wrubel
LabVIEW ProgramsLabVIEW Programs
Have developed a VI to control the Have developed a VI to control the operation of an excimer laser used operation of an excimer laser used for producing photoelectrons.for producing photoelectrons.
Currently testing this VI and Currently testing this VI and comparing its performance with the comparing its performance with the software from the manufacturer.software from the manufacturer.
Once this is done, this VI will be used Once this is done, this VI will be used in place of the original inefficient in place of the original inefficient software.software.
Antiproton beam pathAntiproton beam path
Trap
Degrader
From AD
PPAC and Energy tuning cell
Bending magnets
PPAC – Parallel Plate Avalanche Counter
Calibrating Charge CountersCalibrating Charge Counters
Electrons or positrons are deposited Electrons or positrons are deposited on the degrader. on the degrader.
Want to calculate the effective Want to calculate the effective capacitance of the charge counter.capacitance of the charge counter.
Pulse generator
A250 Charge Sensitive Preamp
Oscilloscope
During calibration, the charge is simulated by converting the pulse from a pulse generator into charge.
100 pF
50 Ω
Studying pbar normalizationsStudying pbar normalizations 3 ways to determine the number of antiprotons 3 ways to determine the number of antiprotons
per cycle: nexp, PPAC sum, and AD number.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.
Other projectsOther projects Building a wagon Building a wagon
for a vacuum for a vacuum pump.pump.
Fixing a liquid Fixing a liquid helium dewar helium dewar level meter.level meter.
Creating Creating electrical controls electrical controls for gate valves.for gate valves.
Questions?
