= VIS Meeting on 2016/1/29 = 2015/1/29 13:30 - Kamioka TV conference room + !SeeVogh Participants:Takahashi, Fujii, Okutomi, Aso, Shoda, Hirata, Tanaka, Ishizaki, Mark, Fabian, Akutsu, Tatsumi, Joris == Schedule == * Schedule status (Aso) * Cleaning of PRM and PR3 chamber from 2/1-2/3. PR2 and BS chambers from 2/4 - 2/6. == PR3 == * PR3 Installation Status (Takahashi) * An OSEM flag and a 2nd wire breaker came off. We had a special meeting on this. * PR3 dusts: leave them until bKAGRA when we replace the 1st prisms (recommendation from Hirose). * #Traverser repair: Repair of the broken ones at Mitaka -> Uraguchi-san is working on it. * #Screws to fix the front and back rings the RM were too long, or the tapping in the holes were too short. Couldn't use M5x40. Ordered M5x35 with vent holes. -> Delivered. '''Remember to replace them''' * PR3 flag and 2nd wire breaker repair status (Tatsumi) * [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=699|Weekly Report]] * Flags and wire breakers will be brought back to Mitaka by Takahashi-san tonight * Ishizaki-san will transport PR3 to Kamioka on Friday together with PRM * The frame for the clean bag is bent. '''Aso will contact Mirapro for a stronger frame.''' === Plan for the next week === * Mon: Chamber cleaning * Tue: Chamber cleaning * Wed: Chamber cleaning * Thu: * Fri: == PR2 == * IOO wants the optical bench back (Aso) * They were taken out. Handed to IOO. * #!OpLev interference check (Akutsu) === Plan for the next week === * Mon: * Tue: * Wed: * Thu: * Fri: == iKAGRA ETM suspension == * Disassembly (and cleaning) of the suspensions (Ohishi) * Everything was cleaned and shipped to Kamioka * Assembly of the suspension * Damaged one vertical spring -> Replace with CLIO ones (all 4 of them to maintain the balance) * Preparation of missing parts (Tatsumi, Takahashi) * Connectors: Will use two D-SUB9, one for coils and another one for Pico-motors * Plates to fix the connectors on the suspension frame were ordered. -> Expected delivery date Feb. 4th. * We have connector shells, pins and cables. * Coil bobin: Delivery date-> Feb. 4th. * PRM transportation (Tatsumi) * Thin plates to protect magnets arrived * Plastic container -> Delivery date 2/2(Kashiwa) 2/4 (Mitaka) * Dummy mirror: To glue the magnets * Coil winding (Takahashi) * Wires: will use the capton wires prepared for the LVDT coils. [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=705|Coil Spec]]. * Winding tools: Stocked in the 20m lab.''' '''-> Delivered to Kamioka. Will do test winding on Wed and Thu next week (Takahashi). * Two of Ando lab. students will come to Kamioka to wind the coils from 2/8. Will work in PR3 clean booth. === Plan for the next week === * Takahashi: Wed-Thu: Coil winding check, picomotor check, TF check. == Travel Plans == * Travel (Week of 2/1) * Takahashi:Wed-Thu * Shoda:Mon-Wed * Mark: * Fabian: * Okutomi: * Fujii: * Ishizaki: Fri * Hirata: * Ohishi: * Travel (Week of 2/8) * Takahashi: Mon-Wed * Shoda:Mon-Fri * Mark: * Fabian: * Okutomi:Mon-Fri * Fujii:Mon-Fri * Ishizaki: * Hirata: * Ohishi: == Other Mechanical Issues == * BF Optimal Weight (Takahashi) * Inscription of the number on the BF #1 and BS BF. Installation of LVDT coils. Check the optimal load of BF #5 and #6. * #5: optimal weight 52.3kg consistent with the previous measurement * #6: optimal weight 53.2kg consistent with the previous measurement * Balast masses: Delivered to Mitaka. Will send them to Kamioka (Hirata) * IM wire clamps * Need to send the wire clamps used for the test hanging to I-ject: will send them to I-ject on Monday (Takahashi) * Wire winches * Shipped to Mitaka today. '''We need a coordination with Ikenoue-san for this work (Takahashi) ''' * #Traverser actuation check (Shoda) * #PR CAD model and assembly drawings (Hirata) * Aso calculated the rotation angle * PR3: 0.786deg counter clockwise from the line connecting the centers of the PR3 and BS chambers. * Will make a report soon. * #Clean work procedure * Order clean wipes (Aso) * KAGRA should have a special meeting for clean requirements: Will propose another meeting. (Aso) * #Wire cleaning (Hirata) * Hirata will order 20m more wires. -> Delivered. Will wipe in the next week. -> Finished. Will send to Kamioka soon. * Will wash Tungsten wire delivery status -> Delivered. Will wipe in the next week -> Finished. Will send to Kamioka soon. * #Production of additional PR winches (Akutsu) * Shipping status (Takahashi, Hirata) -> Wrapped. Will be shipped with IP in the next week. * #OSEM assembly status (Akutsu) * #List of what should be changed for PR3 hanging * People should share ideas whenever they come up with missing thigns. * Shoda made a spread sheet for keep tracking the ideas * https://docs.google.com/spreadsheets/d/1zZaLObWjDSEOTrr85Hz0ApXxEUChK3xJ_chk0f7r5nY/edit?usp=sharing * All the items are now done or being taken care of * #Missing items(to be purchased soon) * #Traverser motor driver (Shoda)''' ''' -> Will discuss Uraguchi-san. Need a box for stepping motor driver. -> These are for PR2. Will be ordered sometime. == Electronics == * What are necessary in the next few weeks ? * Nothing * Electronics diagram and review * Mark will make overview diagrams of VIS electronics by the end of Jan. * Review of PR3 electronics early February-> '''2/4 after the group meeting. ''' * Watch dog system (Tanaka) * Test circuit was produced * Working on the prototype for mass production * Presentation at the next AEL meeting * #LVDT distributor connector problem * Miyakawa-san circulated a design of the conversion cable (D9-D15): [[attachment:ESB-K003-G004-01A.pdf|drawing]] * #Digital System (Okutomi, Fujii) * #Cable status (Takahashi) * Need to send more PTFE cable to finish the remaining two -> '''Will do it in the next week ''' * Need to send the cables used for the test hanging once it is finished. -> '''Will send them once the test hanging is disassembled. ''' * #Cable check * Liu-kun Zhao-kun finished checking all the cables. They found another broken cable. * Will send the broken cables together with the other cable related items (Takahashi). == bKAGRA preparation == * Three big categories of the tasks * Type-A: Leader = Takahashi: Task list, team members * Type-B (BS and SRC): Leader = Mark: Task list, team members * Type-Bp modification: Continue discussion (Aso, Raffaele) == Common Issues == * Wire breaker problem * Prism removal from PR2 (Hirose, Mark) * Not yet ready * #RM cleaning (Takahashi) * Which RMs are really clean ?-> 1st one and the 2nd one have different finish. So only the 1st one is dirty. * For the cleaning purpose, using a leutor seems enough == BS and SR == * Task list (Mark): Present a list at the next VIS meeting. [[KAGRA/Subgroups/VIS/TypeB/TaskList]] * Kick off meeting within February (Mark) * BS prism preparation * Contacted the company LIGO used for the possibility of buying sapphire prisms (Mark) * They are happy to take an order. No Japanese agent. But international order can be taken. * Will ask for the lead time to the company (Mark) [[attachment:JGW-D1504344_rev2.pdf|Drawing to be sent]] ([[attachment:D0810033_ADLIGO SUS IMC_PRISM_BREAKOFF_WIRE LOOP_TEST MASS.pdf|LIGO drawing]]) -> '''Send the drawing to the companies immediately ''' * Can we make SR wire breakers bigger ? * Asked Fuskushima-san about the possibility of widening the slits (Takahashi) -> It is possible but there is a risk of slight deformation. * We will try to widen the slit using the dirty RM used for the test hanging. * We need to decide on how much to widen. Check what happens if we use 5mm tall prism on CAD (Hirata) -> [[attachment:wire and groove position.pdf|Result]] * Make the slit wider by 3mm will interfere with a M5 threaded hole * The hole is needed to keep the mechanical rigidity * Can make a new M5 hole somewhere near by ? * Check what happens if we widen the slit by 3.75mm and make a new M5 (Hirata) * Then we will talk to Fukushima-san again * If the design of the SR prisms can be the same as BS, it will be a good idea to order them at once. * Check if the BS prism can be used(Mark) * Flag design (Mark) * Some concerns * Flag is too tall ? (Raffaele) * Make the foot print smaller to reduce thermal noise ? (Aso) * '''Mark will sort out the ideas and organize a specialized meeting.''' * IP base clamp (Fabian): [[attachment:image.png|Picture]] -> '''Reduce the number of clamps''' * Bread board spring (Takahashi): [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=4775|Slides]] * New accelerometer tests for BS IP (Joris) * e-log [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=700|entry 1]] * e-log [[http://klog.icrr.u-tokyo.ac.jp/osl/?r=701|entry 2]] * #BS Assembly Frame Design (Aso, Hirata) * #BS gluing jigs (Tatsumi) * #Not enough crane height problem (Hirata, Saito) * #BS clean bag (Aso) == Type A == * Task list (Takahashi): Present at the next VIS meeting. * Fishing rod production status (Takahashi) * Ordered the material for the blades. * Stepping motors were ordered. * Mechanical parts remaining to be ordered (have drawings already) * #Type-A Filters Optimal Load Measurements * #Takahashi will make a plan for the optimal load check and ask ATC.-> Check two filters per month from April 2016. -> Will be presented to the ATC steering committee. * #How to manufacture the long maraging wires ? * One prototype was machined by Ojima * Aoshima can do the heat treatment for the long rod. Will ask them soon (Takahashi) -> Still waiting for a quotation. * How to test it ? * We can use the prototype assembly frame in TAMA. == #Type-Bp modification == == Other == * Clean wear * Clean inner wears are given to individuals. Wash them yourself. * http://www.guardner.co.jp/product/products/detail.php?product_id=143 * Safety * No incident * #Work reports * Both on-site and off-site works should be reported in the KAGRA e-log. * A weekly summary entry should be posted before the weekly meeting: the entry should be an itemized list of things done with links to detailed e-log entries. * #Installation procedure document * Many people need to contribute to the document. However, we need one person responsible for the consistency of the document. * BS installation document: Mark will be the editor. * #GAS blade inspection by Virgo (Takahashi) * Shipped the blades. Will get results in 1-2 months. == Next meeting == 2015/2/5 (Fri) 13:00 - The next F2F at Mitaka: 2/19