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== 'Hammering test '== | == - Hammering test == |
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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. * 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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* 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]] |
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* Hammering test around BS chamber * Possible noise source 70-100Hz * Identification the noise path * From leg? From oplev? From duct? * Set accelerometer for feed-forward * Hammering test of the PR2, PR3, PRM, IMMT2 chamber * We don't have any information from those chambers yet. * Hammering test of the IMMT1 chamber * This chamber is including the ISS system * We performed the acoustic injection and identified the some noise peaks. * We placed the accelerometer on the leg of the IMMT1 chamber * Identification of the noise path * Hammering test of the MCF chamber * We performed the acoustic injection and identified the some noise peaks. * We placed the accelerometer on the leg of the IMMT1 chamber * Identification of the noise path * Hammering test of the cryochamber * [[http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/PEM/Meeting/200121/Minute|Discussion]] * Hammering test of the ducts * To check the scattered light effect, we want to perform the hammering test to the all ducts * We will ask Akutsu-san and Aso-san for the priority for following test * Hammering test of the optical tables * (Must) IMC REFL table, REFL table, POP table * (Should) POS table, TMSX table, TMSY table * (If possible) OpLev tables, PCal tables * Hammering test of the MCF-PSL tube |
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== ・PEM injection == | * Hammering test of the end station * EXC, EYC, EXA, EYA chambers * TMSX, TMSY chamber == - PEM injection == === Task list (Done) === * Vibration injection to OMC legs * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13152|klog13152]] * We confirmed that the vibration of the OMC leg is under the sensitivity curve * Acoustic injection to the PSL room(29th Feb.) * We couldn't find the any excess * Acoustic injection to REFL table(29th Feb., 5th Mar. 7th Mar.) * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13231|klog13231]], [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13338|klog13338]], [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13382|klog13382]] * From [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=13382|klog13382]], we can see the some excesses 100-600Hz * Washimi-san and TTanaka-san are analyzing data now. === Task list (todo ; must items) === * Vibration injection to legs of the chambers * After hammering test, we will investigate the environmental vibration may appear to the sensitivity or not * Acoustic injection to the POP table === Task list (todo ; if possible) === * Acoustic injection to the cryochamber * Magnetic injection == - Other task by PEM(?) == === Task list (done) === === Task list (todo) === * Check and remove the unused cables * Clean up on the optical table * Check and turn off the unnecessary instrument * Turn off the some lights * Clean up the experimental area * Clean environment may make the clean experiment |
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 chamber
- Possible noise source 70-100Hz
- Identification the noise path
- From leg? From oplev? From duct?
- Set accelerometer for feed-forward
- Hammering test of the PR2, PR3, PRM, IMMT2 chamber
- We don't have any information from those chambers yet.
- Hammering test of the IMMT1 chamber
- This chamber is including the ISS system
- We performed the acoustic injection and identified the some noise peaks.
- We placed the accelerometer on the leg of the IMMT1 chamber
- Identification of the noise path
- Hammering test of the MCF chamber
- We performed the acoustic injection and identified the some noise peaks.
- We placed the accelerometer on the leg of the IMMT1 chamber
- Identification of the noise path
- Hammering test of the cryochamber
- Hammering test of the ducts
- To check the scattered light effect, we want to perform the hammering test to the all ducts
- We will ask Akutsu-san and Aso-san for the priority for following test
- Hammering test of the optical tables
- (Must) IMC REFL table, REFL table, POP table
- (Should) POS table, TMSX table, TMSY table
(If possible) OpLev tables, PCal tables
- Hammering test of the MCF-PSL tube
Task list (todo ; if possible)
- Hammering test of the end station
- EXC, EYC, EXA, EYA chambers
- TMSX, TMSY chamber
- PEM injection
Task list (Done)
- Vibration injection to OMC legs
- We confirmed that the vibration of the OMC leg is under the sensitivity curve
- Acoustic injection to the PSL room(29th Feb.)
- We couldn't find the any excess
- Acoustic injection to REFL table(29th Feb., 5th Mar. 7th Mar.)
Task list (todo ; must items)
- Vibration injection to legs of the chambers
- After hammering test, we will investigate the environmental vibration may appear to the sensitivity or not
- Acoustic injection to the POP table
Task list (todo ; if possible)
- Acoustic injection to the cryochamber
- Magnetic injection
- Other task by PEM(?)
Task list (done)
Task list (todo)
- Check and remove the unused cables
- Clean up on the optical table
- Check and turn off the unnecessary instrument
- Turn off the some lights
- Clean up the experimental area
- Clean environment may make the clean experiment