Difference between revisions of "5-19-08"
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Revision as of 15:14, 20 May 2008
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) | _1.png) _2.png) _3.png)
|
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 | _counter_clockwise_1.png)
|
| 2 turn clockwise | 1 0.003 | _counter_clockwise_(80mAmp)_1.png)
|
| 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 | 
|
![[1]](http://iac.isu.edu/mediawiki/index.php/Image:Image3.png#filelinks){kind=link}
counter clockwise 1 turn
FC performance
| Current (mA) | scope picture |
| 2 | 
|
| 5 | 
|
| 20 | 
|
| 40 | 
|
| 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