2009.08.11 - Gain Mapping,
9W/10W
2009.08.11 - Vertical dispersion
studies
2009.08.11 - nonlin_bpm
interpolation grid
2009.08.12 - Closed-beta bump
2009.08.19 - Gain map of 23W (CBPM
II)
2009.09.25 - nonlin_bpm Studies
- (dx,dy) distributions resulting from resolution, gain errors
---------------------------------------------
2009.09.16 - Cbar simulation -
method, initial tests
2009.09.18 - Cbar simulation -
corrected cbar normalization
2009.09.21 - Cbar simulation - with
resolution and gain errors (bad RMS values - see 2009.09.24
instead)
2009.09.24 - Cbar simulation -
Corrected RMS results from 2009.09.21
2009.10.09 - 6x6 Cbar Simulation
- ideal lattice, with radiation damping and resonant beam shaking
2009.10.19 - 6x6 Cbar Simulation
- Diagnosing cbar simulations
---------------------------------------------
2009.10.29 - Cbar Simulations
- Two major typos corrected. Results prior to this are not
valid. See newer plots here.
2009.11.03 - Cbar Simulations
- Typo in Python analysis script caused the wrong "Cbar vs. Gain
Errors" to be plotted on 10/29/09. See corrected plots here.
2009.11.05 - Gain Map Simulations
- 2D contour plots of gain map fits vs. grid spacing, # of grid
points.
2009.11.05 - Cbar22 Simulations
- Response of Cbar22 to applied BPM tilts.
2009.11.09 - Cbar Simulations
- Expand on plots from 2009.11.03 to include both gain and tilt
errors, as 2D contour plots.
2009.11.09 - Cbar22 Simulations
- Expand on plots from 2009.11.05; fit simulated BPM tilts in CESRv.
2009.11.13 - Cbar22 Simulations
- How do residual coupling and gain errors affect the quality of BPM
tilt fit for Cbar22 data?
2009.11.17 - Cbar Simulations
- Is there a significant improvement in quality-of-fit if we use
Cbar11 + 22 data in CESRv? Can we fit Cbar12 with vert. steerings
first?
2009.11.17 - Gain Map Simulations
- Now that bsim_cesr has been restructured as a library, how well can
we fit various gain errors at different resolutions? How do these gain
errors affect BPM tilt fits using Cbar data?
2009.11.19 - Vertical Dispersion
Simulations - Using the results of our 'ideal' gain map and BPM
tilt fits, are we able to make a 1cm vertical dispersion measurement?
2009.11.20 - Vertical Dispersion
Simulations - Repeat studies from 11/19/09, with averaging 1000
turns / orbit measurement.
2009.11.20 - Fitting Cbar22 with
BPM Tilts (actual data) - Using Cbar data taken during today's
machine studies, see what fitted BPM tilts look like.
2009.11.22 - Measurement
repeatability - Orbit, dispersion; fitting Cbar with BPM tilts
2009.11.23 - Gain map
repeatability - Map (21E:24E) 3 times. Look at agreement between
maps.
2009.11.24 - Cbar/Tilt Measurement
repeatability - Standard 2085mev and cta_2085mev_25nm_20091123.lat
data.
2009.12.07 - Turn-By-Turn data
simulation - Button responses, amplitudes for full 6x6 tracking
2009.12.07 - Fitted BPM Tilts -
Further analysis regarding data from 2009.11.22-23.
----------------------------------------------------
NOTE: Axes are flipped on tune scan plots between 2010.02.16 -
2010.04.28. Starting at 2010.04.28, axes are corrected. Previous tune
scan plots are obsolete anyway, and only shown for
completeness.
NOTE: Axes are NOT FLIPPED on tune scans-- the original polarity was correct!
However, polarity of frequency maps does appear to be flipped... -JSh, 2011.10.20
2010.02.16 - Tune scan analysis
2010.02.22 - Tune scans for 2fam
lattice
2010.03.03 - Tune scans -
cta_2085mev_xr20m_20091205.lat, 2fam, with quad, bend, and sextupole
errors
2010.03.04 - Tune scans -
cta_2085mev_xr20m_20091205.lat, 2fam, with QUAD errors only
2010.03.04 - Tune scan - vary
amplitudes - cta_2085mev_xr20m_20091205.lat, 2fam, with quad,
bend, and sextupole errors. Vary initial amplitude (x,y,\delta) to
10%, 50% of values from 2010.03.03.
2010.03.05 - Tune scans - Typo
corrected in tune_scan; re-run jobs from 2010.03.03, 2010.03.04
2010.03.08 - Tune scans - Scale
x,y,z amplitudes to ~1.5-3 sigma; L0RF with errors
2010.03.11 - Tune scans -
Introduce sextupole errors at the 0.1-5.0% levels.
2010.03.16 - Tune scans -
High-res scan of 1% sextupole K2 errors; high-res scans of 3MV, 8MV
lattices.
2010.03.19 - Tune scans - CHESS
pretzel lattice (with and without sextupole errors); xquneing to
different xi's for XR20m lattice.
2010.04.08 - Tune scans -
cta_2085mev_20081107 lattice, with new sextupole distribution from
Weiming Guo.
----------------------------------------------------
Note: Tune scan, frequency map plots after this line are all
corrected. -JSh,2010.06.22
Note: Tune scan plots should NOT have the reversed axes
as previously thought. Items with an asterisk (*) have been plotted on the
original axes, and are correct. Frequency map plots are unchanged. -JSh,2011.10.20
2010.04.20 - Compare analytic and
"brute-force" methods for calculating dbeta/ddelta and
deta/ddelta.
2010.04.23 - contributions to xi(2) from
individual elements
*2010.04.28 - first Bengtsson
optimizations - dynamic aperture, tune scans; IDEAL 2FAM PLOTS
*2010.05.03 - sextupoles - starting w/ DLR
distribution, try a second round of optimization
*2010.05.04 - sextupoles - starting w/ 2fam
distribution, try different optimization schemes
*2010.05.05 - sextupole errors - for
the best sext distribution in yesterday's jobs, add errors to quad
k1's and sext k2's
*2010.05.25 - xi.x,y = 6 optimized
sextupole distribution
*2010.06.07 - introduce quad tilt
errors - 220 micro-radians for both 2fam and optimized
distributions
2010.06.09 - TBT data in KEK-style
gain map - compare fits with DLR-style gain map
distributions
*2010.06.10 - Comparing
sextupole distributions - using Bengtsson's formalism as a basis
of comparison.
*2010.06.11 - New sextupole
optimization - using the results of yesterday's studies.
2010.06.11 - Comparing gain map
fits - using the same data sets, try fitting with different
numbers of turns (128, 256, 512)
*2010.06.11 - Frequency map
analysis - first tests on 2fam, JSh optimized sextupole
distributions.
*2010.06.14 - Frequency map analysis -
Apply energy errors to 2fam, jsh_opt sextupoles.
*2010.06.15 - Sextupole
optimizations - 2-stage optimization tests.
*2010.06.16 - Sextupole
optimizations - Increase weights on alpha.xx,xy,yy and
xi(2).x,y
*2010.06.16 - Frequency maps -
vary the number of turns tracked and number of turns used for FFTs.
*2010.06.17 - Frequency maps -
For 2010.05.04 sextupoles, track 4096 turns, with fft_turns = 512.
*2010.06.21 - DA, tune scan,
frequency map - for 2010.05.08 sextupoles
2010.06.22 - Measured tune scans
from 2010.05.08.
*2010.06.23 - D-line xBSM orbit -
dynamic aperture, tune scan, frequency map for "NORM", "BIGD", with
both 2fam and JSh-optimized sextupoles.
*2010.06.24 - Effects of
physical aperture on frequency maps - "BIGD" lattice with
optimized sextupoles, with flat orbit and D-line xBSM orbit.
*2010.06.24 - Quad Errors on BIGD
Lattice with D-Line xBSM Orbit - 220 micro-radian tilts, 125 micron
vertical offsets.
*2010.06.24 - Frequency maps with
energy offsets - BIGD lattice with optimized sextupoles, D-line
xBSM orbit
*2010.06.29 - Frequency map with
2048 turns / 1024 per FFT - for 2fam
*2010.07.01 - Change working
point - for 2fam and JSh-optimized sextupoles, "NORM" lattice.
*2010.07.06 - Full-Span Frequency Maps -
for 2010.05.04 optimized sextupoles, expand frequency maps to x = 40mm.
*2010.07.13 - Ecloud tune shift -
frequency map jobs with +10kHz tuneshifts
2010.07.13 - sextupole optimizations
at proposed working point (0.578,0.542)
2010.07.14 - frequency map analysis
summary - through 2010.07.12; PDF (uncorrected x/y flip as of 2011.10.20)
2010.07.14 - Updated
frequency map, tune scan plots for 2fam, JSh-optimized sextupoles
- NORM lattice (can't find sources; uncorrected as of 2011.10.20)
2010.07.15 - More proposed working
points - NORM lattice, 2fam / 2010.05.04 sextupole distributions
2010.07.15 - Frequency map analysis,
scanning over delta - NORM lattice, 2fam / 2010.05.04 sextupoles.
2010.07.16 - sextupole optimizations
at proposed working point (0.625,0.542)
2010.08.25 - Introduce quad
misalignments, k1 errors; tune scans, frequency maps
2010.08.26 - In a wiggler-free
lattice, re-run sextupole optimizations.
2010.08.27 - Nonlinearities in button
response (simulation)
2010.08.31 - amplitude-dependent
tuneshift in a wiggler-free lattice (simulation)
2010.11.11 - Sextupoles - target
alpha_yy
2010.11.11 - Sextupoles -
high-chromaticity - xqune 2fam to xi=6, then optimize
2010.11.11 - Sextupoles -
high-chromaticity - incrementally increase xi target
2011.01.12 - amplitude-dependent tuneshift in a wiggler-free lattice - sextupoles off, ayy; axx (simulation)
2011.11.03 - tune scans for DTC02-1 ILC-DR lattice