1 / 6

BBLR MD 24 July 2007 preliminary results

BBLR MD 24 July 2007 preliminary results. G. Burtin , R. Calaga, U. Dorda , J.-P. Koutchouk, G. Sterbini, R. Tomas, J. Wenninger , F. Zimmermann. current scans at 26 and 37 GeV/c. relative loss. 8.4 s , 26 GeV. tune corrected. 8.6 s , 37 GeV. 10.0 s , 37 GeV.

bela
Download Presentation

BBLR MD 24 July 2007 preliminary results

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. BBLR MD24 July 2007preliminary results G. Burtin, R. Calaga, U. Dorda, J.-P. Koutchouk, G. Sterbini, R. Tomas, J. Wenninger, F. Zimmermann

  2. current scans at 26 and 37 GeV/c relative loss 8.4s, 26 GeV tune corrected 8.6s, 37 GeV 10.0s, 37 GeV 14 mm distance ~ 8.4 sigma at 26 GeV 10.0 sigma at 37 GeV 12 mm distance ~ 8.6 sigma at 37 GeV lifetime 37 GeV/c data hint at a current threshold, while 26 GeV/c data do not

  3. chromaticity scans 37 GeV/c constant 9 mm distance between beam and wire center ~ 6.5s at 37 GeV/c relative loss QV’ QH’ wire off lifetime wire off nonzero chromaticity together with wire strongly reduces lifetime

  4. distance scans 37 GeV/c relative loss 200 A 150 A lifetime at these wire currents lifetime is very low for separation below 6 or 8 s

  5. low-distance current scan at 37 GeV/c constant 6 mm distance between beam and wire center ~ 4.3s at 37 GeV/c for 50 A wire current the effect of the wire is no longer visible here

  6. some conclusions • 2007 BBLR MDs are off to an excellent start • non zero chromaticity enhances effect of long-range collisions • scaling behavior violated (26 GeV “special”?) • few LR encounters at small distance may be acceptable (we should check this with higher lifetime resolution) • BBLR1 needs to be rotated by 180 degrees prior to week 34 MD, if possible • we look forward to compensation studies and measurements at 55 GeV

More Related