Meeting
7/1 2016 Skype Telecon
- KC and JGP will consider closer for the optical configuration (please upload new info)
- KK will check if we have all necessary components
- KK, KC and JGP will discuss about the disital software in Seoul
- SK and KK will meet in Kamioka for a preparation (8/10)
- We'll have another skype meeting before the site work
7/8 2016 in Sogang University
- JGP will prepare the drawing of the configuration (on the pylon optical table)
- JGP will prepare the required circuits (signal amps).
- For the online data taking and analysis, we will need a digital model and MEDM screens. JGP will prepare the initial concept of the digital software.
- With the prepared concept, we will build the model and make MEDM screens during KC/JGP visit (~1day).
- We noticed that the digital software cannot do arc tangent. We will consider to use an approximation.
- As planned, KK and SK will collect the necessary hardware on 8/10 (DC power supply, 50m cable, cable adaptors, AA filter)
- KK will let JGP know about the Dsub 9 pin assignment to connect to an AA filter.
8/2 2016 Skype Telecon
Preparation
- JGP will get the drawing in a few days.
- All the parts will arrive today. KC and JGP will carry them (no shipping).
- JGP will assemble and test the circuits this week. Reports will be made next week.
- Model and MEDM screens will be prepared with Kirii-kun on 8/10 as well as the first phase of the visit.
- KC will think about the approximation formula of art tangent to use in the digital model.
- SJ will submit the "tunnel entrance form" for the experiment.
- KK will send the Dsub pin assignment today.
- KK will find AA filter soon.
Other note
- No IR laser beam during the experiment.
- We have to check again about the safety lecture.
Next meeting
- Next meeting will be 8/5 9:20 am. KK will call everyone on skype.
8/4 2016 Skype telecon
- The parts arrived; some mechanical parts were found wrong; JGP have fixed them; JGP will assemble today.
- The drawing of the optical table (python table) will be done today by JGP.
- Test result of the setup will be emailed.
- KC made the new algorithm without arc tangent. JGP will check the formulas with real data. KK will check if it can be done in the CDS system or not.
- Check the safety rule.
- SJ will submit the mine entrance form.
- JGP will carry the clumps (which is to fix the sensor on the table).
10/6 2016 skype telecon
- Target is Physics Letter A.
- To check the calibration again with the peak areas and higher harmonics taken into account.
- To check the drift data with the calibration factor.
- To check if the oplev noise went down or not after we took the tiltsensor out.
- For paper, KK and SK will write the intro part, and JGP will write the resulting part.
- Email to Kanda-san (KSC) about the open data
paper contents
- we could calibrate oplev using the tilt sensor
- They agreed ok
- Tiltsensor's dynamic range was much larger than oplevs
- environmental perturbation to be improved
10/20 2016 Local metting (KK & SJ)
- We do not understand the calibration factors (or the spectrum magnitudes) change between tilt sensors and oplevs
- We will re-center the MCE oplev on Monday
- An excitation peak will be inserted on MCE and see if the peak height change in time
- We will have another local meeting on Wednesday morning.
10/26 2016 skype meeting
- oplev noise floor change of the last measurement is most likely because of the tilt sensor installation
- Jungyu will come to KAGRA and we will repeat the measurement
- Windshields will be available thanks to Akutsu san in the next measurement
- Schedule is not fixed yet
3/1 2017 skype meeting
2nd visit klog list http://gwwiki.icrr.u-tokyo.ac.jp/JGWwiki/KAGRA/Subgroups/IOO/TiltSensor/Documents2
- How can we proceed with KAGRA open data regulations?
- Kawamura-sensei will contact to Kanda-san
- Then Kokeyama will ask to KSC board
- Paper contents
- Comparison between oplev and tiltsensor spectra
- present a cal peak to show tiltsensor is properly seeing the mirror motion
- dark/ADC noise limit of tiltsensor
- How can we estimate the tiltsensor dark or ADC noise limit?
- Junegyu and Kyuman will study
- Target is Optics Letters
- Make a rough draft by Niigata f2f meeting
- Next call will be a few days before f2f meeting for the presentation there
4/13 2017 skyoe meeting
(design) - Electrical connection changed - Design will be fix by the next week
- About having oplev and tilt sensor at the same time on one set of pylons - Additional time to investigate necessary - At least MCE will have both oplev and tiltsens at the same time - We will design and make a light wind-sheild - MCO and MCI configuration? Can two sensors be installed at the same time? Keiko will send a picture and Junegyu will check how we can have them - Can oplev QPD and tilt sensor be mounted together - probably difficult. - KK will talk to Miyazawa-san about his question of the channel numbers.
(fabrication) - A small company Kyuman knows can manufacture the sets of tiltsensors for 1.5 Myen. - Seiji will ask if we can buy things from non-Japanese company - 3 sensors for 3 mirrors. No spare. The prototype one we used last time can be reserved as a spare.
(schedule) — fabrication — - Kyuman thinks we can start ordering as soon as the design is fixed - Kyuman and the company together to transfer the technique, which will take some time. - Deliver time will be in the end of August.
— installation - - Sometime in October. Kyuman can stay for a week, Junegyu can stay for 3 weeks in total.
— people — - We will find maybe one student (shift call or what?) - Kirii-kun won’t be able to help due to his master thesis work
(paper) - 5 Hz noise? We could test with also MCI, MCO to see if the other suspensions have the peak or not - Kokeyama will ask Nakano-kun about the co-author (Nakano and Kambara?) - Aim to have a first deadline by the end of April (Junegyu’s deadline 23rd on the experimental part)
(other) Seiji is visiting Sogang university in May.