slc and the sawtooth (from grad student’s perspective)
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SLC and the Sawtooth (from grad student’s perspective). Boris Podobedov NSLS Robert H.Siemann Symposium July 7, 2009. Background. I graduated from Moscow Inst. of Physics & Technology, MS in Physics, summer of 1993 I enrolled in Stanford Ph.D. program in Appl. Phys., fall 1993 - PowerPoint PPT PresentationTRANSCRIPT
1 BROOKHAVEN SCIENCE ASSOCIATES1 BROOKHAVEN SCIENCE ASSOCIATES
SLC and the Sawtooth (from grad student’s perspective)
Boris PodobedovNSLS
Robert H.Siemann Symposium
July 7, 2009
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Background
• I graduated from Moscow Inst. of Physics & Technology, MS in Physics, summer of 1993
• I enrolled in Stanford Ph.D. program in Appl. Phys., fall 1993• I knew nothing about accelerators or acc. physics • In October 1993 I met Bob Siemann … • I became the first grad student of Bob at Stanford/SLAC• I spent 6 years working on my PhD under Bob’s guidance • These were truly exciting times to be here
SLC operations and the mystery of the saw-tooth instability ARDB formation, rapid growth, expansion into new research areasGreat people and creative and stimulating environment
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Professor
AP 324: Introduction to Accelerator Physics
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First Paper Together
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Saw-tooth Instability History
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Instability after Vacuum Chamber Replacement
At Bob’s suggestion this became a topic of my PhD
Mysteries remained:• Effect on the beam• Effect on SLC, if any• Instability mechanism and cause
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Detecting Instability Signals
Clearly a better diagnostics was needed
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Accelerator Physics Through Building Your Own Diagnostics
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New Diagnostics Works Out
We finally got the t-domain instability signal.
We could now combine it with the streak camera
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Saw-Tooth Instability: Main Results
• Recover complete phase-space picture
• Unstable mode contains ~3% of the beam
• Detector signals correlated with SLC beam downstream
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PhD Thesis Writing
• Bob strongly believed that thesis writing is essential part of graduate education• Writing required many iterations• Huge effort from Bob
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What Those Theses Meant for Bob
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Graduation and Beyond
• I moved to BNL in Sept 1999
• We kept in touch discussing topics ranging from PRST-AB to his grad. students, and of course, Science
• My last meeting with Bob was on my SLAC visit in Feb 2007 …
Graduation ceremony, July 1999