ler mar13 analysis is mia data less accurate than that taken in last year? is phase measurement...
Post on 19-Dec-2015
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![Page 1: LER MAR13 Analysis Is MIA data less accurate than that taken in last year? Is phase measurement still Ok? Is coupling measurement still Ok? Or simply that](https://reader030.vdocument.in/reader030/viewer/2022032800/56649d365503460f94a0ea3b/html5/thumbnails/1.jpg)
LER MAR13 Analysis
• Is MIA data less accurate than that taken in last year? Is phase measurement still Ok? Is coupling measurement still Ok? Or simply that the MIA solution over-kill? Or MIA solution caused unwanted nonlinear effect?
Yiton T. Yan
SLAC
Let us quickly survey some results and then we will discuss this at the end.
![Page 2: LER MAR13 Analysis Is MIA data less accurate than that taken in last year? Is phase measurement still Ok? Is coupling measurement still Ok? Or simply that](https://reader030.vdocument.in/reader030/viewer/2022032800/56649d365503460f94a0ea3b/html5/thumbnails/2.jpg)
Virtual LER MAR13, 2007 (left) and wanted model (right)
ey ~ 2.0 Ey ~ 1.5
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MIA wanted LER (left) and after-dialing LER (right)
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Virtual LER MAR13, 2007 (left) vs. after dialing in MIA solution (right)
![Page 5: LER MAR13 Analysis Is MIA data less accurate than that taken in last year? Is phase measurement still Ok? Is coupling measurement still Ok? Or simply that](https://reader030.vdocument.in/reader030/viewer/2022032800/56649d365503460f94a0ea3b/html5/thumbnails/5.jpg)
XX raw data ---- Mar13, 2007 (left) vs. April 25, 2006
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YY raw data ---- Mar13, 2007 (left) vs. April 25, 2006
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XY raw data ---- Mar13, 2007 (left) vs. April 25, 2006
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YX raw data ---- Mar13, 2007 (left) vs. April 25, 2006
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Symplecticity for XX vs. YY MIA data shows that the MIA
data for XX and YY seems to have similar quality
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Singular values ---- Mar13, 2007 (left) vs. August 15, 2006
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Singular Vectors ---- Mar13, 2007 (left) vs. August 15, 2006
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Comparison of R12 residuals: Apr 25, 2006 (top) vs. Mar 13, 2007 (bottom)
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Comparison of R34 residuals: Apr 25, 2006 (top) vs. Mar 13, 2007 (bottom)
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Comparison of R32 (y to x) residuals: Apr 25, 2006 (top) vs. Mar 13, 2007 (bottom)
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Comparison of R14 (x to y) residuals: Apr 25, 2006 (top) vs. Mar 13, 2007 (bottom)
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The Knob: magnet strength changes
QFP9R12 -0.645
QDP8R12 0.71
QFP7R12 -2.477
QDP6R12 -0.523
QFP5R12 -1.018
QDP4R12 1.15
QFP3R12 0.345
QDPR12 0.39
QFPR12 -2.033
QFP9R04 1.081
QDP8R04 0.434
QFP7R04 0.983
QDP6R04 0.325
QFP5R04 1.001
QDP4R04 -0.683
QFP3R04 0.865
QDPR04 -0.328
QFPR04 0.578
SKG1 -1.745
SKG2 3.494
SK6L -0.215
SK5L -0.013
SK4L 0.565
SK3L 0.561
SK2L -0.903
SK2 0.013
SK3 1.127
SK4 -1.194
SK5 0.418
SK6 0.416
SKG3 -1.357
SKG4 -1.579
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Discussion – Why MIA LER solution did not work on Mar 13, 2007, what should we do next for LER?
• Simply LER MIA data was not good enough to warrant a good enough virtual LER?
• The solution over-kill: strong changes of global skew, etc. causing significant orbit change which was not restored to the original orbit after dialing in MIA solution?
• Others?• What should we do next for LER?