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Describe KAGRA/Subgroups/VIS/OpsManual/FishingRods here. | This page describes the status of the fishing rods and provides characterization information measured at the time of assembly. |
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This page describes the status of the fishing rods. | It's important to bear in mind that the reported range of the stepper motor in number of steps is not expected to be accurate and it's useful only as a guideline: * Whenever the stepper driver is reset the posion of the motor (measured in number of steps from a zero) is lost and begins counting from zero wherever its physical position is. * Inaccuracies may arise when a stepper motor reaches the physical end of range because the driver still considers valid the requested position even when its beyond the physcal limit. With respecto to the LVDT range limits, those may change with temperature. <<TableOfContents>> == Input X == Ouput X Input Y Output Y |
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* '''Observations:''' this fishing rod didn't seem to have any problems before but we haven't tried to use it at every temperature condition we've had. | * '''Observations:''' this fishing rod doesn't seem to have any problems, but we haven't used it at every temperature condition we've had. |
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Range: ''' [ -1,700,000 , 1,500,000 ]''' | * '''Range:''' * '''LVDT:''' [ -990 , 903 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8082|8082]]). * '''Stepper motor:''' [ -1,700,000 , 1,500,000 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8082|8082]]). * Temperature when measured: * '''Observations:''' This fishing rod is not known to have problems. See klog entry [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13930|13930]]. |
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Range: from -750 µm to 1000 µm in the LVDT and from 300,000 to 1,000,00 steps in the stepper motor ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4431|4431]]). | * '''Range:''' * '''LVDT:''' [ -750 , 1000 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4431|4431]]). * '''Stepper motor:''' [ 300,000 , 1,000,00 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4431|4431]]). * Temperature when measured: * '''Observations:''' This fishing rod is not known to have problems. See klog entry [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/http://klog.icrr.u-tokyo.ac.jp/osl/?r=13930|13930]]. |
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Range: from -500 µm to 600 µm in the LVDT and from -550,000 to -250,000 ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4430|4430]]). | * '''Range:''' * '''LVDT:''' [ -500 , 600 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4430|4430]]). * '''Stepper motor:''' [ -550,000 , -250,000 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4430|4430]]). * Temperature when measured: * '''Observations:''' This fishing rod is not known to have problems. |
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[[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8082|8082]] | * Calculated temperature correction: [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8082|8082]]. * Recovery after pump down: [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8160|8160]]. |
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([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7758|7758]]) | * '''Range:''' * '''LVDT:''' [ 885 , -1299 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7758|7758]]). * '''Stepper motor:''' [ -500,000 , 1,100,000 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7758|7758]]). * Temperature when measured: * '''Observations:''' After pump down it was not possible to move the keystone to zero using the fishing rod. It went as high as -750 µm at the time ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8135|8135]]). |
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([[http://p://klog.icrr.u-tokyo.ac.jp/osl/?r=4720|4720]]) | * '''Range:''' * '''LVDT:''' [ -2000 , 2000 ]''' '''µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4720|4720]]). * '''Stepper motor:''' [ -700,000 , 1,100,000 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4720|4720]]). * Temperature when measured: * '''Observations:'''This fishing rod of not working at all ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8135|8135]]). It's a real shame because it had a large range of 4 mm total. |
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([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4654|4654]]) | * '''Range:''' * '''LVDT:''' [ -1600 , +1000 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4654|4654]]). * '''Stepper motor:''' [ -200,000 , 250,000 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4654|4654]]). * Temperature when measured: * '''Observations:''' * After pump down it was not possible to move the keystone to zero using the fishing rod. It went as high as -265 µm at the time [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8658|8658]]. * The number of steps for the stepper motor seem relatively small. In principle there's nothing wrong with this but let's point this out. |
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([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7857|7857]]) | * '''Range:''' * '''LVDT:''' [ -865 , 626 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7857|7857]]). * '''Stepper motor:''' [ -1,600,000 , 1,600,00 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=7857|7857]]). * Temperature when measured: * '''Observations: '''This fishing rod is not known to have problems. |
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([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4721|4721]]) | * '''Range:''' * '''LVDT:''' [ -1,700 , 1,400 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4721|4721]]) . * '''Stepper motor:''' [ -700,000 , 1,100,000 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4721|4721]]) . * Temperature when measured: * '''Observations: '''This fishing rod is not known to have problems. |
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([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4721|4721]]) | * '''Range:''' * '''LVDT:''' [ -3,000 , 2,800 ] µm ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4721|4721]]). * '''Stepper motor:''' [ -600,000 , 800,000 ] steps ([[http://klog.icrr.u-tokyo.ac.jp/osl/?r=4721|4721]]). * Temperature when measured: * '''Observations: '''This fishing rod is not known to have problems. Related entries Recovery after pump down: [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=8197|8197]]. |
This page describes the status of the fishing rods and provides characterization information measured at the time of assembly.
It's important to bear in mind that the reported range of the stepper motor in number of steps is not expected to be accurate and it's useful only as a guideline:
- Whenever the stepper driver is reset the posion of the motor (measured in number of steps from a zero) is lost and begins counting from zero wherever its physical position is.
- Inaccuracies may arise when a stepper motor reaches the physical end of range because the driver still considers valid the requested position even when its beyond the physcal limit.
With respecto to the LVDT range limits, those may change with temperature.
Contents
Input X
Ouput X
Input Y
Output Y
Beam splitter
Top filter
Range:
Observations:
Standard Filter
Range:
Observations:
Bottom filter
Range:
Observations: this fishing rod doesn't seem to have any problems, but we haven't used it at every temperature condition we've had.
SR2
Top filter
Range:
Observations: This fishing rod is not known to have problems. See klog entry 13930.
Stardard filter
Range:
Observations: This fishing rod is not known to have problems. See klog entry 13930.
Bottom filter
Range:
Observations: This fishing rod is not known to have problems.
Other related entries
SR3
Top filter
Range:
Observations: After pump down it was not possible to move the keystone to zero using the fishing rod. It went as high as -750 µm at the time (8135).
Standard Flter
Range:
Observations:This fishing rod of not working at all (8135). It's a real shame because it had a large range of 4 mm total.
Bottom Filter
Range:
Observations:
After pump down it was not possible to move the keystone to zero using the fishing rod. It went as high as -265 µm at the time 8658.
- The number of steps for the stepper motor seem relatively small. In principle there's nothing wrong with this but let's point this out.
Other related entries
SRM
Top Filter
Range:
Observations: This fishing rod is not known to have problems.
Standard Filter
Range:
Observations: This fishing rod is not known to have problems.
Bottom Filter
Range:
Observations: This fishing rod is not known to have problems.
Related entries
Recovery after pump down: 8197.