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← Revision 29 as of 2018-11-22 09:41:33 ⇥
Size: 2022
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Deletions are marked like this. | Additions are marked like this. |
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* TxPD1 repairing * THS4631 seems broken * Ordering parts. * OFS2 closed loop functionality repairing * Relay is OK. Investigating the cause. * Asked Bin-Hua to bring relay. * DAC noise problem * With DAC cable, very large noise and offset are observed. It may be difficult to set working point. |
* Excitation port noise |
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* DAC input bias between MEDM and actual * Laser remote control * PC will be setup. * Same script as in Y-end may be applicable. |
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* Tx PDs detect light even if the AOM input is almost 0. | |
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* Borrowing 2 from Toyama univ. They has to be returned on 9/19 or 20. * WSK measurement * Alignment of the last 2 mirrors (Accidentally moved) * Modification is required from LIGO's procedure. * Code for WSK measurement analysis * To be delivered on 9/19 or 20. * May have to prepare voltage calibrator to calibrate readout by DGS. |
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~9/11 | ~11/3 first test to inject PCal laser to the X-end test mass |
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* Periscope install * Equip picomoters to the mirror * Wall between duct and modules * Ordered. Will arrive Kamioka on 9/11. * Set duct and wall. * Green laser preparation * Power supplies are OK. * New post arrived. To be set. * TCam has to come back. * PC has to be re-installed. |
* Rx module alignment * QPD alignment * OL/CL TF measurement * OFS board gain seems strange. Saturation around 13 dB. * Strange bump in AA/AI (~6 kHz) |
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~JPS meeting 9/14 | ~X-arm commissioning line injection |
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* AOM response measurement * Check working point is consistent to that in KEK * OL/CL TF measurement |
* BPM test * Preparation for X-arm commissioning calibration line injection * Guardian ~O3 |
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* DGS part seems not noisy, but cause large noise when connected to the OFS. | |
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~9/28 * Complete periscope install * Rx module alignment ~X-arm commissioning line injection * BPM test * Picomoter setting * Preparation for X-arm commissioning calibration line injection ~O3 |
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* Cable arrangement | |
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* Initial laser power just after turned on seems too small ? | |
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* Periscope re-installation |
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~Y-arm commissioning * Prepare cross calibration setup and calibrate an integrating sphere |
Detailed task list of PCal is listed here.
X-end PCal
Urgent
- Excitation port noise
2nd-urgent
- Stray light
- Tx PDs detect light even if the AOM input is almost 0.
- Put dumpers
~11/3 first test to inject PCal laser to the X-end test mass
- Rx module alignment
- QPD alignment
- OL/CL TF measurement
- OFS board gain seems strange. Saturation around 13 dB.
- Strange bump in AA/AI (~6 kHz)
~X-arm commissioning line injection
- BPM test
- Preparation for X-arm commissioning calibration line injection
- Guardian
~O3
- RPN measurement
- Laser noise measurement
- Harmonics noise measurement
- VGA noise measurement
- Excitation noise measurement
- DGS part seems not noisy, but cause large noise when connected to the OFS.
- Peak stability test
- Shot noise
- Offset input noise
- Noise model
- Unstable D-sub connection at Tx module
- Some connectors are dead.
- OFS upgrade
- Operation tool preparation
Bonus work
- AOM current
- Sometimes over 0.5 V ?
- Take care about grounding
Pre-categorization
Y-end PCal
- Periscope re-installation
Laser power calibration setting in Toyama Univ.
~Y-arm commissioning
- Prepare cross calibration setup and calibrate an integrating sphere