5-19-08: Difference between revisions

From New IAC Wiki
Jump to navigation Jump to search
← Older edit
Oborn (talk | contribs)
Bureaucrats, ldapadmin, Administrators, wikiadmin
47 edits
Oborn (talk | contribs)
Bureaucrats, ldapadmin, Administrators, wikiadmin
47 edits
No edit summary
 
(8 intermediate revisions by the same user not shown)
Line 1: Line 1:
[http://wiki.iac.isu.edu/index.php/Beam_Position_Monitor_Tests_in_HRRL Go Back]
Tests of the beam position monitor and the FC using the HRRL
Tests of the beam position monitor and the FC using the HRRL
= Position tests=
= Position tests=
Line 36: Line 38:
| 3 turn  clockwise || 0.646 <math>\pm</math> 0.169 ||  [[Image:1 turns (2nd) counter clockwise_1.png |200 px]]
| 3 turn  clockwise || 0.646 <math>\pm</math> 0.169 ||  [[Image:1 turns (2nd) counter clockwise_1.png |200 px]]
|-
|-
| 2 turn  clockwise || 1 <math>\pm</math> 0.003 ||    [[Image:1 turns (3rd) counter clockwise (80mAmp)_1.png |200 px]]
| 2 turn  clockwise || 0.8 <math>\pm</math> 0.080 ||    [[Image:1 turns (3rd) counter clockwise (80mAmp)_1.png |200 px]]
|-
|-
| 4 turns counter clockwise || 0 <math>\pm</math> 0.003 ||[[Image:12 turns counter clockwise_80mAmp.png |200 px]]
| 4 turns counter clockwise || 0.028 <math>\pm</math> 0.003 ||[[Image:12 turns counter clockwise_80mAmp.png |200 px]]
|-   
|-   
| 0 turns from center || 3/8 <math>\pm</math> 0.003 ||[[Image:at center.png |200 px]]
| 0 turns from center || 0.135 <math>\pm</math> 0.159 ||[[Image:at center.png |200 px]]
|-
|-
| 8 turns clockwise ||  15/17 <math>\pm</math> 0.003 ||[[Image:8 turns  clockwise.png |200 px]]
| 8 turns clockwise ||  0.885 <math>\pm</math> 0.001 ||[[Image:8 turns  clockwise.png |200 px]]
|-
|-
| 6 turns clockwise ||  .778 <math>\pm</math> 0.003 ||[[Image:6 turns clockwise.png |200 px]]
| 6 turns clockwise ||  .778 <math>\pm</math> 0.002 ||[[Image:6 turns clockwise.png |200 px]]
|-
|-
| 2 turns counter clockwise ||  0.231 <math>\pm</math> 0.112 ||[[Image:2 turns counter clockwise.png |200 px]]
| 2 turns counter clockwise ||  0.231 <math>\pm</math> 0.112 ||[[Image:2 turns counter clockwise.png |200 px]]
Line 80: Line 82:
|}<br>
|}<br>
[[Image:FC_JLAB_HRRL_Calib_5-19-08.jpg]]
[[Image:FC_JLAB_HRRL_Calib_5-19-08.jpg]]
[http://www.iac.isu.edu/mediawiki/index.php/HRRL Go back]


=Rise of table per rotation=
=Rise of table per rotation=
Line 106: Line 113:
| 10 turns ccw (down) || 4.94
| 10 turns ccw (down) || 4.94
|-
|-
|}<br>
|}
Where "h" is height of table, and "cw" and "ccw" stand for clockwise and counter clockwise respectively.
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
The average change of height by a turn is 0.19 cm, with standard deviation σ =0.1cm
[http://wiki.iac.isu.edu/index.php/Beam_Position_Monitor_Tests_in_HRRL Go Back]

Latest revision as of 06:36, 5 February 2009

Go Back

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 [math]\displaystyle{ \pm }[/math] 0.0623
4 turn clockwise 0.659 [math]\displaystyle{ \pm }[/math] 0.0149
3 turn clockwise 0.646 [math]\displaystyle{ \pm }[/math] 0.169
2 turn clockwise 0.8 [math]\displaystyle{ \pm }[/math] 0.080
4 turns counter clockwise 0.028 [math]\displaystyle{ \pm }[/math] 0.003
0 turns from center 0.135 [math]\displaystyle{ \pm }[/math] 0.159
8 turns clockwise 0.885 [math]\displaystyle{ \pm }[/math] 0.001
6 turns clockwise .778 [math]\displaystyle{ \pm }[/math] 0.002
2 turns counter clockwise 0.231 [math]\displaystyle{ \pm }[/math] 0.112


File:BPM 80mA 25ns 10Hz Position1.png


[1]

counter clockwise 1 turn

FC performance

The JLab FC was placed (in AIR) 30 cm from the zero port window of the HRRL. A ground braid connected the BNC connector to the ground used by the accelerator RF. Without this ground there was even more RF pickup. The lower yellow trace represents the RF pulse from the HRRL which was running with 40 ns pulse widths at a rep rate of 205 Hz.

Current (mA) scope picture
2
5
20
40
80




Go back

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

Go Back

Retrieved from "https://wiki.iac.isu.edu/index.php?title=5-19-08&oldid=31724"