Shift 20101118

09:00 LC, LD, LN

Plan

  • Same as before - load 10nov17_0005.dat set file (MW's optics tweaked by AA and LD), tune for low background and trajectory, do laser/ e beam timing, search for collisions.

Start

Damping ring changed from 10 bunches, 0.78 Hz to 1 bunch, 1.56Hz. Lasers on. Seed cleaned (power up from 280 to 320mW) and tuned to lock.

Okugi-san tuning extraction. Loss in extraction line high and it appears that one of the OTR screens was in the beam. After ~ 2hours tuning access taken to swap polarity of QM11FF and QM16FF, as required by MW's optics design (only QM16FF done on 16th Nov).

11.20am Magnets changed - load up 10nov17_0005.dat.

12.10pm Beam very unstable and hard to tune. Near resonance in the DR - possibly only good solution is completer retune of DR. AA, GW, MW tuning DR and extraction line.

Wirescans / Background

Wire Scanner Dimension Centre (mm) Width (Ám)
MW1X X 19.403▒0.167 433.0▒230.3
Y 53.089▒0.023 62.7▒25.2

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Topic revision: r1 - 18 Nov 2010 - LauraCorner

 
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