Difference between revisions of "AP-CEBAF-Optics-2015-02-28"
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== Data and References == | == Data and References == | ||
* [https://docs.google.com/spreadsheets/d/1AMVnjOjYZAqxLSQI_bzgt4cbmZlRY0DIh6uUaYCadPk Spring 2015 Optics Spreadsheet ] | * [https://docs.google.com/spreadsheets/d/1AMVnjOjYZAqxLSQI_bzgt4cbmZlRY0DIh6uUaYCadPk Spring 2015 Optics Spreadsheet ] | ||
| − | * 0L injector match | + | * 0L injector match (E=107.2 MeV, BDL=536.365*K1 for L=0.15m magnets) |
** 0L07: [https://logbooks.jlab.org/entry/3322505 zigzags] -> MQD0L06 horizontal scan centered near 1800, range +/-270 | ** 0L07: [https://logbooks.jlab.org/entry/3322505 zigzags] -> MQD0L06 horizontal scan centered near 1800, range +/-270 | ||
** 0L08: [https://logbooks.jlab.org/entry/3322505 zigzags] -> MQB0L07 vertical scan centered near -3600, range +/-500 | ** 0L08: [https://logbooks.jlab.org/entry/3322505 zigzags] -> MQB0L07 vertical scan centered near -3600, range +/-500 | ||
| − | * 1E03 match: | + | * 1E03 match (E=1057.2 MeV, BDL=5289.659*K1 for L=0.15m magnets): |
| − | * 2E01 match: | + | * 2E01 match (E=2007.2 MeV, BDL=10042.95*K1 for L=0.15m magnets): |
| − | * 3E01 match: | + | * 3E01 match (E=2957.2 MeV, BDL=14796.24*K1 for L=0.15m magnets): |
| − | * 4E01 match: | + | * 4E01 match (E=3907.2 MeV, BDL=19549.52*K1 for L=0.15m magnets): |
| − | * 5E01 match: | + | * 5E01 match (E=4857.2 MeV, BDL=24302.81*K1 for L=0.15m magnets): |
| − | * 6E01 match: | + | * 6E01 match (E=5807.2 MeV, BDL=29056.10*K1 for L=0.15m magnets): |
| − | * 8E01 match: | + | * 8E01 match (E=7707.2 MeV, BDL=38562.68*K1 for L=0.15m magnets): |
| − | * 9E01 match: | + | * 9E01 match (E=8657.2 MeV, BDL=43315.97*K1 for L=0.15m magnets): |
| − | * AE01 match: | + | * AE01 match (E=9607.2 MeV, BDL=48069.25*K1 for L=0.15m magnets): |
| − | * 5C00 match: | + | * 5C00 match (E=10557.2 MeV, BDL=52822.54*K1 for L=0.15m magnets): |
| − | * 1C match: | + | * 1C match (E=9607.2 MeV, fifth pass, BDL=48069.25*K1 for L=0.15m magnets): |
| − | * 2C match: | + | * 2C match (E=2007.2 MeV, first pass, BDL=10042.95*K1 for L=0.15m magnets): |
* rayTrace data: [https://logbooks.jlab.org/entry/3322485 3322485 H] [https://logbooks.jlab.org/entry/3322488 3322488 H] [https://logbooks.jlab.org/entry/3322490 3322490 V] | * rayTrace data: [https://logbooks.jlab.org/entry/3322485 3322485 H] [https://logbooks.jlab.org/entry/3322488 3322488 H] [https://logbooks.jlab.org/entry/3322490 3322490 V] | ||
Revision as of 09:51, 28 February 2015
This is a wiki page for references, information, and procedures about Feb 27-Mar 1 work to transversely match CEBAF Twiss parameters at the injector (~0L07), 1E03, and xE01 locations.
Contents
Philosophy
The philosophy was developed at a 15:00 meeting in MCC, including Arne Freyberger, Mike Spata, Yves Roblin, Mike TIefenback, Jay Benesch, Todd Satogata, and Operations:
- use zigzag harp scans to identify quadrupole ranges for good optics/emittance measurements at each harp.
- modify qsUtility configuration files in the golden area and acquire optics/emittance measurements with traditional qsUtility scans.
- use qsUtility to analyze the scans and get measured horizontal/vertical Twiss parameters at the start of the respective scan quads.
- back-propagate measured Twiss parameters to the start of the upstream xS04 quadrupole.
- use the qsUtility betatron match module (which uses ced2elegant and elegant) to calculate the match, with match point at the harp, using xS04-xS10 quadrupoles for matching to distribute matching effort.
- evaluate and install the match.
- re-scan the harp and compare beam sizes to sqrt(emit_meas * beta_design)
Prerequisites at Each Measurement Location
- 4-8 uA tune beam to first dumplette downstream of match point.
- quad centering of BPM/quadrupole pairs for qsUtility scan quadrupoles.
- clean steering in region of measurement and downstream to maximize aperture, minimize beam losses.
- clean ORFP dispersion in region of measurement and correction. In particular, dispersion in both planes must be consistent with zero at scan quadrupoles and harp.
Procedure
- confirm harp is working and set harp parameters
- perform zigzag measurements to establish scan quadrupoles and ranges
- edit qsUtility configuration files
- perform qsUtility scans
- evaluate qsUtility data to get measured Twiss parameters and remittances
- back-propagate measured Twiss parameters to start of upstream xS04 quadrupole with elegant
- A script to do this is in ~satogata/backpropagate.pl
- use qsUtility betatron match module to calculate xS04-xS10 match
- evaluate and install match
- re-scan harp and evaluate match effectiveness
- perform confirmation fopt
Data and References
- Spring 2015 Optics Spreadsheet
- 0L injector match (E=107.2 MeV, BDL=536.365*K1 for L=0.15m magnets)
- 1E03 match (E=1057.2 MeV, BDL=5289.659*K1 for L=0.15m magnets):
- 2E01 match (E=2007.2 MeV, BDL=10042.95*K1 for L=0.15m magnets):
- 3E01 match (E=2957.2 MeV, BDL=14796.24*K1 for L=0.15m magnets):
- 4E01 match (E=3907.2 MeV, BDL=19549.52*K1 for L=0.15m magnets):
- 5E01 match (E=4857.2 MeV, BDL=24302.81*K1 for L=0.15m magnets):
- 6E01 match (E=5807.2 MeV, BDL=29056.10*K1 for L=0.15m magnets):
- 8E01 match (E=7707.2 MeV, BDL=38562.68*K1 for L=0.15m magnets):
- 9E01 match (E=8657.2 MeV, BDL=43315.97*K1 for L=0.15m magnets):
- AE01 match (E=9607.2 MeV, BDL=48069.25*K1 for L=0.15m magnets):
- 5C00 match (E=10557.2 MeV, BDL=52822.54*K1 for L=0.15m magnets):
- 1C match (E=9607.2 MeV, fifth pass, BDL=48069.25*K1 for L=0.15m magnets):
- 2C match (E=2007.2 MeV, first pass, BDL=10042.95*K1 for L=0.15m magnets):
- rayTrace data: 3322485 H 3322488 H 3322490 V
