1 / 10

SBS Optics and Spin Transport

SBS Optics and Spin Transport. John J. LeRose. Technical Review of the Super BigBite Spectrometer November 17, 2008. This is what it looks like to me!. 1 st Order Optics. e.g. Etc.

Download Presentation

SBS Optics and Spin Transport

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. SBS Optics and Spin Transport John J. LeRose Technical Review of the Super BigBite Spectrometer November 17, 2008

  2. This is what it looks like to me!

  3. 1st Order Optics e.g. Etc. Subsequently: If you know how well you can measure x, x’, y, and y’, you know how well you can determine the target parameters (provided xtar = 0)

  4. Projected Errors

  5. Higher Order Effects? • Strategy: • Use SNAKE to create a database of trajectories and then fit the reconstruction tensor. (higher order terms) • Use the reconstruction tensor in a Monte-Carlo fashion to evaluate the errors.

  6. Momentum Dependence of ΔΩ 8 GeV/c 1 GeV/c

  7. Spin Transport Non-dispersive precession Dispersive precession Target Target to Reaction Plane Reaction Plane

  8. Spin Transport Because of Pl - Pt mixing, the non-dispersive bend angle contributes a factor ~100 to the FF ratio systematic error. However, it is very small: ±1.1 mrad (FWHM) and can be reconstructed with high precision (~0.1mrad).

  9. Still to do (optics wise anyway) • Finalize magnet and insert 3-D map into SNAKE • Repeat analysis described here • …

More Related