2009 RHIC data (IPM, vacuum ...) for the store 11026
Below are the files related to the IPM and vacuum data that I've grabbed from the Logview for the store 11026 (~110183013 to 10183038).
The beta-functions for the IPM's from the model are:
Blue : vertical : 80.044 m (bo2-ipm3)
horizontal : 24.3747 m (bi1-ipm3)
Yellow : vertical : 82.2637 m (yo1-ipm3)
horizontal : 23.7966 m (yi2-ipm3)
From R. Connolly, even in 2009, we no longer had the high-bandwidth channels which allowed single bunch measurements. The amplifiers being used have a bandwidth of about 100 kHz (compared to 35 MHz for the fast amps). These give a step-impulse rise time of about 3.5us or about 1/4 of a turn. Any measurement with the current IPMs shows an average of the bunches in about a third of the ring. When the trigger is on bucket 120 the measurement is an average of buckets 1-120.
From the LogView, for the Blue IPM's (horizontal and vertical), they're buckets 120 and 270. For yellow, though it's the same as above for the horizontal IPM, it's buckets 100 and 270 for the vertical IPM.
Going to the program RhicInjection (loading /operations/app_store/RhicInjection/BunchPatterns/patterns_Run9/090x090_P1), it's clear that if buckets 120 and 1270 are filled bunches, they should be bucket nos. 121 and 271 (starting from 1, ending at 358, as only at most every 1 in 3 buckets were filled). Then, bucket 100 in principle was an empty bucket. But from what R. Connolly described above, changing the trigger bucket by a few in either direction does not change the measurement.
In the Profile plots and text files, each step should be about ~0.3 mm (S. Tepikian).
The beta-functions for the IPM's from the model are:
Blue : vertical : 80.044 m (bo2-ipm3)
horizontal : 24.3747 m (bi1-ipm3)
Yellow : vertical : 82.2637 m (yo1-ipm3)
horizontal : 23.7966 m (yi2-ipm3)
From R. Connolly, even in 2009, we no longer had the high-bandwidth channels which allowed single bunch measurements. The amplifiers being used have a bandwidth of about 100 kHz (compared to 35 MHz for the fast amps). These give a step-impulse rise time of about 3.5us or about 1/4 of a turn. Any measurement with the current IPMs shows an average of the bunches in about a third of the ring. When the trigger is on bucket 120 the measurement is an average of buckets 1-120.
From the LogView, for the Blue IPM's (horizontal and vertical), they're buckets 120 and 270. For yellow, though it's the same as above for the horizontal IPM, it's buckets 100 and 270 for the vertical IPM.
Going to the program RhicInjection (loading /operations/app_store/RhicInjection/BunchPatterns/patterns_Run9/090x090_P1), it's clear that if buckets 120 and 1270 are filled bunches, they should be bucket nos. 121 and 271 (starting from 1, ending at 358, as only at most every 1 in 3 buckets were filled). Then, bucket 100 in principle was an empty bucket. But from what R. Connolly described above, changing the trigger bucket by a few in either direction does not change the measurement.
In the Profile plots and text files, each step should be about ~0.3 mm (S. Tepikian).
Groups:
- yipkin's blog
- Login or register to post comments