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Presentation transcript:

N. BlaskovicFONT Meeting1 November 2013 week 2 FONT shift summary N. Blaskovic

Introduction Data from shift on 28 th November 10x1 (standard) optics used on day Variable attenuators: 40 dB throughout FONT Meeting2N. Blaskovic

Intra-chamber misalignment Minimising I and Q simultaneously in all 3 IP BPMs was unsuccessful Mover tilt required for beam to lie on axis of all BPMs appears to be outside mover range Q remains large if beam does not travel on BPM axis regardless of beam position FONT Meeting3N. Blaskovic

Intra-chamber misalignment FONT Meeting4N. Blaskovic IPAIPB IPC ZV2X A (~nominal) ZV2X A max min max min mover base beam ?

Calibrations IP BPM calibrations performed with beam waist on BPM being calibrated Calibrations performed with beam and mover tilt that allowed (I, Q) ≈ (0, 0) at some point over calibration: –ZV2X: A for IPA and IPB calibration –ZV2X: A for IPC calibration FONT Meeting5N. Blaskovic

FONT Meeting6N. Blaskovic IPAmoverScan3 on

FONT Meeting7N. Blaskovic IPBmoverScan2 on

FONT Meeting8N. Blaskovic IPCmoverScan5 on

Jitter runs Jitter runs performed with different waists. Expected jitter if waist at IP (Tauchi-san): FONT Meeting9N. Blaskovic IPAIPBIPIPC jitter 0

FONT Meeting10N. Blaskovic jitRun1 on dB waist at IPB !?

FONT Meeting11N. Blaskovic jitRun2 on dB waist at IPA drift?* * No drift removal, sorry!

FONT Meeting12N. Blaskovic jitRun3 on dB waist at IPA drift?* * No drift removal, sorry!

FONT Meeting13N. Blaskovic jitRun4 on dB waist at IPA IPAIPBIPIPC jitter 0 as expected

FONT Meeting14N. Blaskovic jitRun5 on dB waist at IPA drift?* * No drift removal, sorry!

FONT Meeting15N. Blaskovic jitRun6 on dB waist at IPB IPAIPBIPIPC jitter 0 as expected !?

FONT Meeting16N. Blaskovic jitRun7 on dB waist at nominal IP IPAIPBIPIPC jitter 0 as expected

FONT Meeting17N. Blaskovic jitRun8 on dB waist at IPC IPAIPBIPIPC jitter 0 as expected