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| == Memo for Commissioning break (Mar. 2020) == | = Memo for Commissioning break (Mar. 2020) = |
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| === Hammering test === | == - Hammering test == |
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| ==== Task list (Done) ==== | === Task list (Done) === |
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| * Reported later, the main reason the vibration to the OMC legs for the optical table inside the vacuum | * Reported later, the main reason is the vibration to the OMC legs for the optical table inside the vacuum |
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| * | * Reported later, the main reason is the vibration to the OMC legs for the optical table inside the vacuum |
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| * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13105|klog13105]] * Now we didn't use the AS PD signals for interferometer control * There was possibility that the reflection light from AS table make dirty scattering light * Shadowed between the OMC viewport and AS table, but we couldn't see the clear noise reduction * Also, when we added vibration to the OMC viewport, we couldn't detect the noise increasing. |
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| ==== Task list (Partially done) ==== | * Hammering test SRM chamber (Done 22nd Feb.) * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13105|klog13105]] * The SRM mirror is misaligned. So We need to investigate the scattering light from SRM mirror * In this test, we can see the excess above 100 Hz * After this test, we cannot lock the interferometer. So if we have a time, we want to check again. |
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| ==== Task list (todo ; must items) ==== | === Task list (Partially done) === |
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| ==== Task list (todo ; if possible) ==== | * Hammering test between PR2 and BS, PR2 side (Done 24th Feb.) * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13138|klog13138]] * PR2-BS duct give excess noise around 70-100 Hz * Hammering test between PR2 and BS, PR2 side (Done 24th Feb.) * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13138|klog13138]] * PR2-BS duct give excess noise around 70-100 Hz * Hammering test between BS and SR2, BS side (Done 24th Feb.) * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13138|klog13138]] * BS-SR2 duct give slight excess noise but not much * Hammering test between BS and SR2, SR2 side (Done 24th Feb.) * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13138|klog13138]] * BS-SR2 duct give slight excess noise but not much * Hammering test between SR2 and SR3, SR2 side (Done 24th Feb.) * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13138|klog13138]] * SR2-SR3 duct give broadband exces noise around 100-400 Hz * Hammering test between SR2 and SR3, SR3 side (Done 24th Feb.) * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13138|klog13138]] * SR2-SR3 duct give broadband exces noise around 100-400 Hz * Hammering test between SR3 and SRM, SR3 side (Done 24th Feb.) * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13138|klog13138]] === Task list (todo ; must items) === * Hammering test around BS * Possible noise source === Task list (todo ; if possible) === == - PEM injection == === Task list (Done) === * Vibration injection to OMC leg for optical table * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13152|klog13152]] * We confirmed that the vibration from OMC leg is under the sensitivity curve === Task list (todo ; must items) === |
Memo for Commissioning break (Mar. 2020)
- Hammering test
Task list (Done)
- Hammering test of the OMC chamber (Done 22nd Feb.)
- There is excess in the sensitivity between 100 Hz to 400 Hz
- Reported later, the main reason is the vibration to the OMC legs for the optical table inside the vacuum
- Hammering test AS table (Done 22nd Feb.)
- Reported later, the main reason is the vibration to the OMC legs for the optical table inside the vacuum
- Reflection light check (Done 22nd Feb.)
- Now we didn't use the AS PD signals for interferometer control
- There was possibility that the reflection light from AS table make dirty scattering light
- Shadowed between the OMC viewport and AS table, but we couldn't see the clear noise reduction
- Also, when we added vibration to the OMC viewport, we couldn't detect the noise increasing.
- Hammering test SRM chamber (Done 22nd Feb.)
- The SRM mirror is misaligned. So We need to investigate the scattering light from SRM mirror
- In this test, we can see the excess above 100 Hz
- After this test, we cannot lock the interferometer. So if we have a time, we want to check again.
Task list (Partially done)
- Hammering test between PR2 and BS, PR2 side (Done 24th Feb.)
- PR2-BS duct give excess noise around 70-100 Hz
- Hammering test between PR2 and BS, PR2 side (Done 24th Feb.)
- PR2-BS duct give excess noise around 70-100 Hz
- Hammering test between BS and SR2, BS side (Done 24th Feb.)
- BS-SR2 duct give slight excess noise but not much
- Hammering test between BS and SR2, SR2 side (Done 24th Feb.)
- BS-SR2 duct give slight excess noise but not much
- Hammering test between SR2 and SR3, SR2 side (Done 24th Feb.)
- SR2-SR3 duct give broadband exces noise around 100-400 Hz
- Hammering test between SR2 and SR3, SR3 side (Done 24th Feb.)
- SR2-SR3 duct give broadband exces noise around 100-400 Hz
- Hammering test between SR3 and SRM, SR3 side (Done 24th Feb.)
Task list (todo ; must items)
- Hammering test around BS
- Possible noise source
Task list (todo ; if possible)
- PEM injection
Task list (Done)
- Vibration injection to OMC leg for optical table
- We confirmed that the vibration from OMC leg is under the sensitivity curve