1. Beam Size Flip-Flop Measurements
R. Holtzapple, M. Billing, B. Cerio
In CESR-c conditions with 26 bunches in the CESR, single bunch tune, vertical beam size and luminosity were measured parasitically. The BSM was used to measure the vertical beam size of e+ and e-. Tune was measured with the BPM while pinging vertically. Luminosity was measured with the FLM. These quantities were measured in a stable colliding beam state and in an induced “flip-flopped” state where the vertical beam size changed and luminosity was reduced.

2. Preliminary Flip Flop Measurement (tunes not measured)
Stable Colliding Beams
Flip-Flopped State
FLIP FLOP

3. Flip Flop BSM Measurement: end of fill
Flip-Flopped State
Stable Colliding Beams
Pretzing-13 from 7 to 64cu
Xtuning 4 from 48 to 5cu
Flip-Flopped State

4. Change in Beam Size: end of fill

5. Change in Tune: end of fill, pretzing

6. Change in Tune: end of fill, xtuning

7. Change in Luminosity: end of fill
pretzing
xtuning

8. Flip Flop Measurement: top of fill
Stable Colliding Beams
Flip-Flopped State
FLIP FLOP

9. Change in Tune: top of fill

10. Change in Luminosity: top of fill