5-19-08

Tests of the beam position monitor and the FC using the HRRL

Position tests

Below we see the first signals from the BPM

changed current

 Current scope picture 80(early) 40 80(later)

changed position

 position change asym scope picture 5 turns clockwise of platform 0.879 0.0623 4 turn clockwise 0.659 0.0149 3 turn clockwise 0.646 0.169 2 turn clockwise 1 0.003 4 turns counter clockwise 0 0.003 0 turns from center 3/8 0.003 8 turns clockwise 15/17 0.003 6 turns clockwise .778 0.003 2 turns counter clockwise 0.231 0.112

counter clockwise 1 turn

FC performance

 Current (mA) scope picture 0 File:Put picture here 1 File:Put picture here 10 30 60 80

Rise of table per rotation

Measurement
 Turns h (cm) Original position 10.02 10 turns ccw (down) 9.03 10 turns ccw (down) 7.00 10 turns cw (up) 9.04 10 turns cw (up) 10.04 10 turns ccw (down) 9.05 10 turns ccw (down) 7.00 10 turns ccw (down) 4.94

Where "h" is height of table, and "cw" and "ccw" stand for clockwise and counter clockwise respectively.

The average change of height by a turn is 0.19 cm, with standard deviation σ =0.1cm