1 / 21

MI8 line study result Update

MI8 line study result Update. 04/22/2014 Ming-Jen Yang, MI. Study on April 8 th. 1-bump orbit HT800, HT804, HT806, and HT808 VT803, VT805, VT807, and VT809 Dispersion data from -1600 Hz to +1600 Hz. Data Beam abort on first turn. BPM data from MI8 line up to MI40. Multiwire data

barnum
Download Presentation

MI8 line study result Update

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. MI8 line study result Update 04/22/2014 Ming-Jen Yang, MI

  2. Study on April 8th • 1-bump orbit • HT800, HT804, HT806, and HT808 • VT803, VT805, VT807, and VT809 • Dispersion data • from -1600 Hz to +1600 Hz. • Data • Beam abort on first turn. • BPM data • from MI8 line up to MI40. • Multiwire data • MI8 line + 4 in MI ring. • MW829

  3. Multi-wire horizontal profiles

  4. Multi-wire vertical profiles

  5. Scaling to new 8-GeV • Main Injector • I:MIBEND, I:IQF, and I:IQD • Recycler • Dipoles • Bend angles are just between SGD and PGD. • Scaled by .9939251. • Quadrupoles • Transfer constants changed from 1.0 to .993925 • Multipoles • Upstream end shim fields scaled. • All others scaled transfer constants. • MI8 line • All fields in permanent magnets stay the same.

  6. HT800 1st order orbit

  7. HT804 1st order orbit

  8. HT806 1st order orbit

  9. VT803 1st order orbit

  10. VT805 1st order orbit

  11. VT807 1st order orbit

  12. Dispersion function

  13. Coupling in MI8 line

  14. Orbit analysis • Multi-wire data • Fit all profiles for position and sigma. • Examine 1-bump orbit • With new 8-GeV energy. • Quad focusing adjustments. • Coupling in the MI8 line. • Match dispersion function eta • Compare measured eta with model • Adjust initial eta and eta' values. • Coupling • Based only on horizontal plane to vertical. • Non-linear vertical dispersion function • Most visible in vertical plane data • Likely source of error in vertical eta.

  15. Dispersion data, vertical plane

  16. Dispersion data, horizontal plane

  17. Lattice analysis • Fitting horizontal plane beam sigma • Horizontal emittance and dpop. • Fitting vertcial plane sigma • Vertical emittance only • Vary initial alpha and beta in each plane • And do the emittance fitting. • Looking for best fit to the profile sigma.

  18. Sigma, horizontal plane

  19. Sigma, vertical plane

  20. Issues • Vertical plane beam sigma • Not matching well starting at mw851. • Possible profiles spoiler • Incomplete first turn abort • Re-visit 1-bump orbit data • Remove data set with beam being clipped. • Possibly looking at the 4th data set for any sign of inconsistency.

  21. Incomplete first turn abort in MI

More Related