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| = 40m work plan (edited Jun 2017) = | = 40m work plan = |
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| == Planning == [[This google document | https://docs.google.com/spreadsheets/d/10pod0tRMSwmlSHKBv8u4G1ETmIn639GabQRUY-wFuH0/edit#gid=0]] collects some project ideas for the short/medium/long term. |
[[https://docs.google.com/spreadsheets/d/1jS-ia6H-TLtqI64pk95z1t08OOJuNAHsVGZPTRpcuxE/edit#gid=289000591|Work plan and scheduling for BHD Phase-I]] |
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| == Long term future == | [[Complete_power_shutdown_2022_08 | 2022 Aug 12th Power Shutdown/Start Plan]] |
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| * The 40m could be the prototype interferometer for the third generation interferometer * In particular, if we decide to use Silicon test mass at longer wavelength, we want to accumulate experiences with the new type of devices (mirrors, crystals, noises, laser stabilization, etc) |
[[Complete_power_shutdown_2022_07 | 2022 July 8th Power Shutdown/Start Plan]] |
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| * This project should start once the baseline concept of the third generation IFO is fixed and the basic table-top R&Ds show supportive results. | [[Complete_power_shutdowwn_2022 | 2022 Feb 5th Power Shutdown/Start Plan]] |
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| * What kind of tests do we want to do at the 40m? Quantum? Thermal? | [[Project_Planning_2021 | 2021 Planning]] |
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| == Mid term future == * '''How can we make the 40m useful for aLIGO?''' * TCS testing with the tip-tilt suspensions. Which tip-tilt? What to be tested? What to be measured? TT+IFO? TT+OMC? * TT sus improvement. Request help of LIGO Engineering. Make it tall. Run shaker tests. Once they are OK off-line, replace the TTs in-vacuum. * Scattering measurements. Characterize the low to high angle scattering to investigate the relationship between the phasemap and the scattering. Utilize the advantage of having ATF-coated mirrors and (sort of) long arms. This is related to the mirror cleaning. * OMC resurrection/upgrade. What's the motivation? * Control related topics? == Near term targets == * How to make the lock indefinite. * What to do with DRFPMI? (Transition to 1f signals, sensing matrix, open loop TF, cavity pole measurement) * Implementing LSC feedforward cancellation (e.g. actuation FF MICH->PRM (seems OK now), MICH->SRM (not great) MICH->DARM, PRCL->DARM, SRCL->DARM * Can we write a paper only with the locking of DRFPMI? How? Do we need to combine it with something else? * Modulation cancellation technique to further reduce CARM coupling into 3F signals during ALS CARM/DARM reduction. * Vent * Pre-vent: ifo loss measurements (PRG, Arm refl, Arm scans, Loss measurement with the spot position scanned) * Pre-vent: Any independent measurements? (Scattering, spot cameras, etc) * Venting: Arm mirror wiping, arm length change? Just adjust the difference? Do we change the arm length concept? * Venting: Any other modification? Do we want a scattering measurement setup? * Venting: Cold cathode, convectron installation. * Post-venting measurement. * ISS == Paper worth topics == * DRFPMI? * Delayline Freq Discriminator / Phase Tracker * Scattering characterization * Modulation cancellation * Other control related topics (e.g. CESAR, ESCOBAR, ALS FOL) ---- = Old materials. To be merged to the above info = This should be kept up-to-date. This is an overview of our near-term goals. We can link to other TODO lists from here. == PRMI commissioning == * PRMI locked! * Investigate triggering (trigger on POP110 instead?) * What is the correct normalization? * Lower Q on Vio2 filters * Finish updating IFO configure scripts, medm "restore" (Jamie) * OSA modulation depth measurements at: * REFL * AS * Power budget at all available ports, include 1f(22)/2f(110) * PRC gain * --(Oplev calibration (BS? PRM?))-- * Sensing matrix * Cavity length (use new Anamaria method) * Loop gain (make sure loop is stable for measurements) * Noise budget * Full Finesse model. * Fix hardware anti-aliasing in LSC (move up cutoff freq to correspond to sample rate) == DRMI == This and FPMI are the next primary tasks. '''''We will need to vent to flip SR2 first,''''' although we need better calculation of the PRC/SRC coupled-cavity affect on the SRC mode. * SRC mirror RoC calculations. What is the long-term solution? (Jamie) == End table upgrade == This is needed before we move on the FPMI commissioning. * [[endtable_upgrade|Project page]] * ETMY table must be completed ASAP (Manasa) * What is left to do? * ETMX upgrade needs to be planned/coordinated. == FPMI == We obviously need both end tables fully functional before we get to this. == PRFPMI == * Oplev calibration for ETMX, ETMY == DRFPMI == == Next vent == Will need to vent soon to flip SR2. * SR2 flip * Are all black glass beam dumps installed? Longer term: * New OSEM mount screws * New periscope plate |
[[Project_Planning_Pre_2017| Pre-2017 Planning]] |
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