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User-Friendly Mass Scan Program Development in LabView by Sam Bozek at ALS

Sam Bozek, a second-year HSSRPP student at Queen’s University, developed a user-friendly mass scan program using LabView at the Advanced Light Source (ALS) in 2008. The program involves setting magnetic fields, measuring ion currents with an Electrometer, and deriving equations for ion paths. The data processed is then graphically displayed. LabView was utilized for its graphical interface to control instruments. Acknowledgments to ALS team members. Visit www.xkcd.com for more information.

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User-Friendly Mass Scan Program Development in LabView by Sam Bozek at ALS

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  1. Developing a user friendly Mass-scan program in Lab View Sam Bozek HSSRPP, Advanced Light Source August 8th, 2008

  2. Advanced Light Source • About Sam Bozek • Second Year of HSSRPP • Graduate of Albany High School • Freshman at Queen’s University • Pursuing a degree in Physics • I get my own Tam O’Shanter soon. It’s a Queen’s thing.

  3. Advanced Light Source • ALS • Electrons traveling near the speed of light in a forced circular path emit UV and X-Ray light that then shines down Beamlines to experimental endstations. • Beamline 10.0.01 • The Atomic, Molecular, and Optical Beamline

  4. Advanced Light Source • Mass Scans • The power supply sets the magnetic field of the analyzing magnet • The ion beam then hits the faraday cup, producing a current • The Current of the faraday cup is then measured with a Keithley 6517A Electrometer

  5. Advanced Light Source • The Equation • Using four equations (F=qvB, F=m*v^2/r, E=1/2 * mv^2, E=qΔV) one can derive an equation for a magnetic field that would force another ion along the same path an earlier ion traveled. • This equation turns out to be: • B2=B1*sqrt(m2q1/m1q2)

  6. Advanced Light Source • Then… • After that, the data is read from the power supply and Keithley and then put into the program • This gives a graph! • Y-axis is current from faraday cup, X-axis is the power supply’s current • .

  7. LabView • LabView • Uses a graphical programming interface • Can be used to communicate with a variety of instruments i.e. powersupplies, Keithleys • The Program: • Written in order to create a user friendly mass scan program that is adjustable.

  8. The Guts of the Program

  9. The Guts of the Program

  10. Acknowledgments • ALS • Alex Aguilar • Ron Phaneuf • Brian Smith • Ed Domning • Bill Bates • Matthias Hoener • Daniel Rolles • Eddie Red • CSEE • Joe Crippen • Gigi Dornfest • Dale Koistinen • Naomi Zabel

  11. Questions? www.xkcd.com

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