Size: 12256
Comment:
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Size: 14459
Comment:
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Deletions are marked like this. | Additions are marked like this. |
Line 18: | Line 18: |
|| 009 || 2013 Nov. 19 || T. Suzuki ||<#ff0000> Urgent! In KEK, thrust bearing without grease was checked. Suzuki-san will ask the load and speed and so on. The cryogenic test is necessary. (Thrust bearing is about 50mm in diameter and 300kg load).||Control|| Check whether the thrust bearing can work at the cryogenic temperature. ||2013 Nov. 26|| | || 009 || 2013 Nov. 19 || T. Suzuki ||<#ff0000> Urgent! Saito-san introduced ceramic bearing (and companies, NTN, NSKN). Takayuki Tomaru showed other one (http://www.jaxa.jp/press/nal/20020327_bearing_j.html) (#043)||Control|| Check whether the thrust bearing can work at the cryogenic temperature. This part is necessary to adjust angle between intermediate mass and its recoil mass. But, it works for initial alignment. Thrust bearing is about 50mm in diameter and load is about 100kg.||2013 Nov. 26|| |
Line 23: | Line 23: |
|| 014 || 2013 Nov. 26 || T. Suzuki and K. Yamamoto ||<#ff0000> Urgent!||Sapphire monolithic suspension||Suzuki-san and Kazuhiro will report the serious lack of human resources on the next year to SEO and EO.||2013 Dec. 3|| || 015 || 2013 Nov. 26 || R. Kumar ||Closed. Rahul investigated and explained [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2073|Sapphire blade spring]]. Kazuhiro (Hayama) (and Kentaro and Yoichi) gave comment about data analysis (and noise and control).||Sapphire monolithic suspension||Rahul investigates how much the lowest frequency of sapphire spring is. After that, we ask it is a problem for observation to Data Analysis group.||2013 Dec. 10|| || 016 || 2013 Dec. 3 || R. Takahashi, E. Hirose ||<#ff0000> Urgent! Ryutaro has already gave information to Eiichi.||Overall design||Type A 3 dimension drawing. Ryutaro gives Eiichi 2 dimensional design drawing and Eiichi makes drawings.|||| || 017 || 2013 Dec. 3 || R. Takahashi, H. Ishizaki, T. Sekiguchi ||<#ff0000> Urgent! ||Vertical spring||Design drawing for vertical spring in platform (Ishizaki and Takahashi). Takanori takes care of shape of blade spring. The load on GAS in Type B like is different from that of Ad LIGO like.|||| |
|| 014 || 2013 Nov. 26 || T. Suzuki and K. Yamamoto ||Closed. Now, members of SEO and EO recognized the issue, but how to fix ?||Sapphire monolithic suspension||Suzuki-san and Kazuhiro will report the serious lack of human resources on the next year to SEO and EO.||2013 Dec. 3|| || 015 || 2013 Nov. 26 || R. Kumar ||Closed. Rahul investigated and explained [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2073|Sapphire blade spring]]. Kazuhiro (Hayama) (and Kentaro and Yoichi) gave comments about data analysis (and noise and control).||Sapphire monolithic suspension||Rahul investigates how much the lowest frequency of sapphire spring is. After that, we ask it is a problem for observation to Data Analysis group.||2013 Dec. 10|| || 016 || 2013 Dec. 3 || R. Takahashi, E. Hirose ||<#ff0000> Urgent! Ryutaro has already gave information to Eiichi. Eiichi proceeds.||Overall design||Type A 3 dimension drawing. Ryutaro gives Eiichi 2 dimensional design drawing and Eiichi makes drawings.|||| || 017 || 2013 Dec. 3 || R. Takahashi, H. Ishizaki, T. Sekiguchi ||<#ff0000> Urgent! They asked Saito-syouten quotation for test bench. But they are quite busy. They asked other company. Ryutaro asked other company. In both cases, no reply yet. Suzuki-san and Kazuhiro (Yamamoto) will ask mechanical workshop of KEK and Kashiwa (ISSP). ||Vertical spring||Design drawing for vertical spring in platform (Ishizaki and Takahashi). Takanori takes care of shape of blade spring. The load on GAS in Type B like is different from that of Ad LIGO like.|||| |
Line 32: | Line 32: |
|| 023 || 2013 Dec. 10 || ||<#ff0000> Urgent! ||Overall design||Baffle design : Mirror can observe the frame of hole of radiation shield for laser beam. It is an issue of scattered light. We also consider how to reduce the size of baffle. || || || 024 || 2013 Dec. 10 || Y. Aso, E. Hirose ||<#ff0000> Urgent! ||Sapphire monolithic suspension||Yoichi Aso and Eiichi Hirose prepare the plan of optical contact and screw, respectively. ||24 Dec 2013|| |
|| 023 || 2013 Dec. 10 ||T. Akutsu ||<#ff0000> ||Overall design||Baffle design : Mirror can observe the frame of hole of radiation shield for laser beam. It is an issue of scattered light. We also consider how to reduce the size of baffle. || || || 024 || 2013 Dec. 10 || Y. Aso, E. Hirose ||<#ff0000> Urgent! ||Sapphire monolithic suspension||Yoichi Aso and Eiichi Hirose prepare the plan and R&D items of optical contact and screw, respectively. ||24 Dec 2013|| |
Line 36: | Line 36: |
|| 027 || 2013 Dec. 10 || T. Suzuki ||Closed. He released [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2075|Sapphire surface friction]]. ||Sapphire monolithic suspension||Suzuki-san has data of friction between sapphire and metal and he will circulate later. ||17 Dec 2013|| | || 027 || 2013 Dec. 10 || T. Suzuki ||Closed. He released [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2075|Sapphire surface friction]]. ||Sapphire monolithic suspension||Suzuki-san has data of friction between sapphire and sapphire and he will circulate later. ||17 Dec 2013|| |
Line 38: | Line 38: |
|| 029 || 2013 Dec. 10 || T. Suzuki, S. Koike, C. Tokoku ||<#ff0000> Urgent! Koike-san prepared [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2076|Drawing payload and baffle in shield]]. Tokoku-san is studying.||Vertical spring||Suzuki-san asks Koike-san to provide design drawing in shield. Tokoku-san learns how to handle it in CAD. || || || 030 || 2013 Dec. 10 || T. Suzuki, N. Kimura ||<#ff0000> Urgent! It is up to Prof. Nakamoto. Suzuki-san and Kimura-san continue negotiation.||Material||Suzuki-san (or Kimura-san) checks the schedule of procurement of NSSC130S. ||17 Dec. 2013 || || 031 || 2013 Dec. 10 || Y. Sakakibara ||<#ff0000> Urgent! He will order SUS 316L spheres with and with ECB to check whether ECB is necessary for SolBlack or not.||Material||Yusuke orders sphere made from SUS 316L and 305M to check how machining is difficult and whether deposition of SolBlack is OK. || || || 032 || 2013 Dec. 10 || C. Tokoku ||<#ff0000> Urgent! ||Material||Tokoku-san investigates where we can measure magnetism and asks measurement or measures. || 17 Dec. 2013 || |
|| 029 || 2013 Dec. 10 || T. Suzuki, S. Koike, C. Tokoku ||Closed. Koike-san prepared [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2076|Drawing payload and baffle in shield]]. ||Overall design||Suzuki-san asks Koike-san to provide design drawing in shield. Tokoku-san learns how to handle it in CAD. || || || 030 || 2013 Dec. 10 || T. Suzuki, N. Kimura ||<#ff0000> It is up to Prof. Nakamoto. Suzuki-san and Kimura-san continue negotiation.||Material||Suzuki-san (or Kimura-san) checks the schedule of procurement of NSSC130S. ||17 Dec. 2013 || || 031 || 2013 Dec. 10 || Y. Sakakibara ||<#ff0000> Urgent! He will order SUS 316L spheres with and with ECB to check whether ECB is necessary for SolBlack or not. We must consider ECB is necessary from point of view of scatter. If scatter is issue, ECB is necessary. ||Material||Yusuke orders sphere made from SUS 316L and 305M to check how machining is difficult and whether deposition of SolBlack is OK. || || || 032 || 2013 Dec. 10 || C. Tokoku ||Closed. She found that Cryogenic Research Center in Hongo campus has SQUID. She is preparing paper for submission. We can start the measurement at the beginning of the next year. Kazuhiro (Yamamoto) add this topic to Microsoft Project. ||Material||Tokoku-san investigates where we can measure magnetism and asks measurement or measures. || 17 Dec. 2013 || |
Line 43: | Line 43: |
|| 034 || 2013 Dec. 10 || C. Tokoku, T. Suzuki ||<#ff0000> Urgent! ||Material||Tokoku-san prepares the mockup to research how to install wire between room and cryogenic temperature by end of next week. First of all, she checks where it will be in 101. Duct could be made from plastic. Wire is titan or its alloy. Suzuki-san prepares the stainless wire. ||20 Dec. 2013 || || 035 || 2013 Dec. 10 || ||<#ff0000> Urgent! ||Material||Monitor system to check whether the wire between room and cryogenic temperature touches the cryoduct. || || || 036 || 2013 Dec. 10 || T. Suzuki, S. Koike ||<#ff0000> Urgent! ||Material||Suzuki-san checks result of Koike-san’s calculation to evaluate the deformation of radiation shield after evacuation. || || || 037 || 2013 Dec. 10 || Y. Sakakibara ||<#ff0000> Urgent! ||Material||Yusuke calculate how the radiation into shield depends on the diameter of cryoduct. || 17 Dec. 2013|| || 038 || 2013 Dec. 10 || D. Chen, R. Takahashi, T. Sekiguchi, E. Majorana ||<#ff0000> Urgent! ||Control||Dan will consult Takanori, Ryutaro and Ettore (how to evaluate the requirement for stepping motor for Type B or Virgo ? ) || 17 Dec. 2013|| || 039 || 2013 Dec. 10 || T. Suzuki ||<#ff0000> Urgent! ||Control||Suzuki-san reports the strength of glue for coil-magnet actuator in the next meeting. || 17 Dec. 2013|| |
|| 034 || 2013 Dec. 10 || C. Tokoku, T. Suzuki ||<#ff0000> Urgent! Ti-6Al-4V bar will be delivered tomorrow. Other parts are at ICRR. Suzuki-san will bring stainless wire in this week.||Material||Tokoku-san prepares the mockup to research how to install wire between room and cryogenic temperature by end of next week. First of all, she checks where it will be in 101. Duct could be made from plastic. Wire is titan or its alloy. Suzuki-san prepares the stainless wire. ||20 Dec. 2013 || || 035 || 2013 Dec. 10 || ||<#ff0000> Urgent! Kazuhiro consults with Ettore.||Material||Monitor system to check whether the wire between room and cryogenic temperature touches the cryoduct. || || || 036 || 2013 Dec. 10 || T. Suzuki, S. Koike ||<#ff0000> Urgent! ||Material||Suzuki-san checks result of Koike-san’s calculation to evaluate the deformation of radiation shield after evacuation for design of cryoduct on radiation shield top.|| || || 037 || 2013 Dec. 10 || Y. Sakakibara ||Closed. He summarized. [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2074|Calculation of thermal radiation from SAS hole]]||Material||Yusuke calculate how the radiation into shield depends on the diameter of cryoduct. || 17 Dec. 2013|| || 038 || 2013 Dec. 10 || D. Chen, R. Takahashi, T. Sekiguchi, E. Majorana ||Closed. He summarized result [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2063|Cryogenic meeting status report on 2013/12/17 (Control)]]. The mass moved by stepping motor is on the order of kg. ||Control||Dan will consult Takanori, Ryutaro and Ettore (how to evaluate the requirement for stepping motor for Type B or Virgo ? ) || 17 Dec. 2013|| || 039 || 2013 Dec. 10 || T. Suzuki ||Closed. He reported [[http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2077|AdhesiveTest]]. He recommends Nitofix. ->(#044). Othrewise, Araldite rapid. ||Control||Suzuki-san reports the strength of glue for coil-magnet actuator in the next meeting. || 17 Dec. 2013|| |
Line 52: | Line 52: |
|| 043 || 2013 Dec. 17 || K. Yamamoto ||<#ff0000> Urgent! ||Overall design ||Kazuhiro will ask Takashi Uchiyama how much CLIO suspension rotates during cooling.Kazuhiro Yamamoto summarizes the requirement of dynamic range of mirror position and yaw rotation because the top of Type A must be adjusted for this purpose. He also asks Takashi what happened in CLIO.|| 25 Dec. 2013|| || 044 || 2013 Dec. 17 || T. Suzuki ||<#ff0000> Urgent! Suzuki-san will reserve the out gas measurement system at KEK. For baking, the spacer between magnet and mirror is necessary because baking mirror with glued magnet causes contamination.||Control||Suzuki-san asks Saito-san whether Nitofix is ultra high vacuum compatible.|| 25 Dec. 2013|| |
Cryopayload's Action Item List
General Descriptions
This is a list of action items identified in the cryopayload meeting after its kick-off (2013 Nov 15). If you want to know the previous information or historical path to the cryopayload meetings, please refer to CRY-AOS meeting.
Action Items
A/I# |
Identified on |
Assigned to |
Status/Output |
Related to |
Description |
Due date |
001 |
2013 Nov. 19 |
Sekiguchi, Hirose |
Closed. Takanori and Osamu Miyakawa found the document about OSEM (it includes the schematic design of circuit) by themselves. |
Control |
Ask somebody in LIGO details of the circuit for OSEM. |
2013 Nov. 26 |
002 |
2013 Nov. 19 |
R. Takahashi |
Closed. Unfortunately, there is not 3 dimensional but only 2 dimensional design drawing.->#016 |
Overall design |
3-D design drawing of Type-A is necessary (ASAP!). Ask to Gianni. |
2013 Nov. 26 |
003 |
2013 Nov. 19 |
R. Takahashi |
Closed. Ryutaro explained. However, further discussion is necessary.->(#011) |
Vertical spring |
About blade metal spring (vertical spring), the schedule and strategy and so on will be summarized by R. Takahashi, Ishizaki, Sekiguchi, and K. Yamamoto, and reported in the next meeting. |
2013 Nov. 26 |
004 |
2013 Nov. 19 |
K. Yamamoto |
Closed. (1)Eric is busy. Moreover, Eric does not use ANSYS or COMSOL. However, Yoichi (or his student) will calculate it using COMSOL (Kazuhiro wrote Yoichi on Microsoft Project).(2)No files remain in Ando lab. |
Material |
About the masses, including a recoil mass, intermediate mass, intermediate recoil mass, and platform, the evaluation of the eddy current damping is necessary. K. Yamamoto will ask (1) to Eric Hennes how much he can make his effort for this problem and whether he can provide files for Finite Element Analysis. (2) to Ando or Aso whether Nishi's file for eddy current damping still remains. |
2013 Nov. 26 |
005 |
2013 Nov. 19 |
D. Chen |
Closed. The Picomotor didn’t work at 77K. But that might be because of the cooling shock. So we will have quick cooling test. |
Control |
D. Chen will ask Uchiyama whether a picomotor can survive at cryogenic temperature. |
2013 Nov. 26 |
006 |
2013 Nov. 19 |
D. Chen |
Closed. He received the design drawing from Takanori. |
Control |
D. Chen looks for design drawing of a stage for Type-B, and some commercial stages. |
2013 Nov. 26 |
007 |
2013 Nov. 19 |
K. Yamamoto |
Closed. Kazuhiro rewrote it. |
Control |
The schedule for the control system should be considered again. |
2013 Nov. 26 |
008 |
2013 Nov. 19 |
K. Yamamoto |
Closed. Dan asked Ryutaro. |
Control |
About the procurement of the OSEMs, K. Yamamoto will consult R. Takahashi. |
2013 Nov. 26 |
009 |
2013 Nov. 19 |
T. Suzuki |
Urgent! Saito-san introduced ceramic bearing (and companies, NTN, NSKN). Takayuki Tomaru showed other one (http://www.jaxa.jp/press/nal/20020327_bearing_j.html) (#043) |
Control |
Check whether the thrust bearing can work at the cryogenic temperature. This part is necessary to adjust angle between intermediate mass and its recoil mass. But, it works for initial alignment. Thrust bearing is about 50mm in diameter and load is about 100kg. |
2013 Nov. 26 |
010 |
2013 Nov. 19 |
D. Chen (?) |
Closed. (i)In order to fix LED and PD, circuit board is used. We must check circuit board is OK at low temperature. -> #019(ii)Dan shows 7m cable increases the noise. Long cable can generates oscillation at high frequency region. The length of cables for cryo payload is 20m in length. We must check how much the long (flat) cable generates noise. If it is a problem, satellite boxes in vacuum are necessary. (iii)Window of photo detector will be removed because nitrogen gas is in Photo Diode. |
Control |
About OSEM, (i)check about out gas; (ii)check noises by 10-m long line; (iii)check whether the window of photodiode be removed. |
2013 Nov. 26 |
011 |
2013 Nov. 26 |
T. Sekiguchi |
Closed. Takanori summarized and explained.Vibration via heat link (T. Sekiguchi)->#017 |
Vertical spring |
For the basis of discussion, Takanori will summarize the vibration via heat link until this weekend. After that, he and Ryutaro circulate their ideas about vertical spring and we discuss. |
2013 Dec. 1 |
012 |
2013 Nov. 26 |
K. Yamamoto |
Urgent! He rewrote, but again, he must do so. First of all, strategy must be fixed. |
Vertical spring |
Kazuhiro rewrites schedule. |
2013 Dec. 3 |
013 |
2013 Nov. 26 |
K. Yamamoto |
Closed. He explained. Strategies for sapphire monolithic suspension 2(K. Yamamoto)He also revised schedule. |
Sapphire monolithic suspension |
Kazuhiro will summarize the details of schedule for monolithic sapphire suspension based on above discussion by the next meeting. |
2013 Dec. 3 |
014 |
2013 Nov. 26 |
T. Suzuki and K. Yamamoto |
Closed. Now, members of SEO and EO recognized the issue, but how to fix ? |
Sapphire monolithic suspension |
Suzuki-san and Kazuhiro will report the serious lack of human resources on the next year to SEO and EO. |
2013 Dec. 3 |
015 |
2013 Nov. 26 |
R. Kumar |
Closed. Rahul investigated and explained Sapphire blade spring. Kazuhiro (Hayama) (and Kentaro and Yoichi) gave comments about data analysis (and noise and control). |
Sapphire monolithic suspension |
Rahul investigates how much the lowest frequency of sapphire spring is. After that, we ask it is a problem for observation to Data Analysis group. |
2013 Dec. 10 |
016 |
2013 Dec. 3 |
R. Takahashi, E. Hirose |
Urgent! Ryutaro has already gave information to Eiichi. Eiichi proceeds. |
Overall design |
Type A 3 dimension drawing. Ryutaro gives Eiichi 2 dimensional design drawing and Eiichi makes drawings. |
|
017 |
2013 Dec. 3 |
R. Takahashi, H. Ishizaki, T. Sekiguchi |
Urgent! They asked Saito-syouten quotation for test bench. But they are quite busy. They asked other company. Ryutaro asked other company. In both cases, no reply yet. Suzuki-san and Kazuhiro (Yamamoto) will ask mechanical workshop of KEK and Kashiwa (ISSP). |
Vertical spring |
Design drawing for vertical spring in platform (Ishizaki and Takahashi). Takanori takes care of shape of blade spring. The load on GAS in Type B like is different from that of Ad LIGO like. |
|
018 |
2013 Dec. 3 |
K. Yamamoto |
Closed. He summarized (in Japanese. Cryogenic payload strategy). |
Material |
Kazuhiro summarize requirement of magnetization and so on before the meeting with Sumikin |
2013 Dec. 17 |
019 |
2013 Dec. 3 |
R. Takahashi |
Urgent! |
Control |
Ryutaro will consult Saito-san on the outgas of circuit board for OSEM. |
|
020 |
2013 Dec. 3 |
K. Yamamoto |
Urgent! |
Sapphire monolithic suspension |
Kazuhiro summarize the length of sapphire fiber. He must take bending point into account. |
17 Dec 2013 |
021 |
2013 Dec. 3 |
K. Yamamoto |
Urgent! |
Sapphire monolithic suspension |
Kazuhiro write the report about backup plan. |
17 Dec 2013 |
022 |
2013 Dec. 3 |
D. Chen |
Closed. -> (#040) |
Sapphire monolithic suspension |
He considers structure in the intermediate mass (sapphire blades, stepping motor, stages). Later we discuss. |
17 Dec 2013 |
023 |
2013 Dec. 10 |
T. Akutsu |
|
Overall design |
Baffle design : Mirror can observe the frame of hole of radiation shield for laser beam. It is an issue of scattered light. We also consider how to reduce the size of baffle. |
|
024 |
2013 Dec. 10 |
Y. Aso, E. Hirose |
Urgent! |
Sapphire monolithic suspension |
Yoichi Aso and Eiichi Hirose prepare the plan and R&D items of optical contact and screw, respectively. |
24 Dec 2013 |
025 |
2013 Dec. 10 |
E. Hirose |
Urgent! |
Sapphire monolithic suspension |
Eiichi prepares document describing planned test and contributions. |
24 Dec 2013 |
026 |
2013 Dec. 10 |
D. Chen |
Closed. He asked and we discussed this topic.->(#041,042) |
Sapphire monolithic suspension |
Dan will ask Ryutaro what is pro and con of large intermediate mass. |
17 Dec 2013 |
027 |
2013 Dec. 10 |
T. Suzuki |
Closed. He released Sapphire surface friction. |
Sapphire monolithic suspension |
Suzuki-san has data of friction between sapphire and sapphire and he will circulate later. |
17 Dec 2013 |
028 |
2013 Dec. 10 |
Y. Aso |
Urgent! |
Vertical spring |
Yoichi checks vibration transfer function of heat links with extra pendulums and whether weight of mass of these pendulums can be on the order of kg using ANSYS or COMSOL. |
|
029 |
2013 Dec. 10 |
T. Suzuki, S. Koike, C. Tokoku |
Closed. Koike-san prepared Drawing payload and baffle in shield. |
Overall design |
Suzuki-san asks Koike-san to provide design drawing in shield. Tokoku-san learns how to handle it in CAD. |
|
030 |
2013 Dec. 10 |
T. Suzuki, N. Kimura |
It is up to Prof. Nakamoto. Suzuki-san and Kimura-san continue negotiation. |
Material |
Suzuki-san (or Kimura-san) checks the schedule of procurement of NSSC130S. |
17 Dec. 2013 |
031 |
2013 Dec. 10 |
Y. Sakakibara |
Urgent! He will order SUS 316L spheres with and with ECB to check whether ECB is necessary for SolBlack or not. We must consider ECB is necessary from point of view of scatter. If scatter is issue, ECB is necessary. |
Material |
Yusuke orders sphere made from SUS 316L and 305M to check how machining is difficult and whether deposition of SolBlack is OK. |
|
032 |
2013 Dec. 10 |
C. Tokoku |
Closed. She found that Cryogenic Research Center in Hongo campus has SQUID. She is preparing paper for submission. We can start the measurement at the beginning of the next year. Kazuhiro (Yamamoto) add this topic to Microsoft Project. |
Material |
Tokoku-san investigates where we can measure magnetism and asks measurement or measures. |
17 Dec. 2013 |
033 |
2013 Dec. 10 |
T. Suzuki |
Urgent! |
Material |
Suzuki-san asks companies (for example, http://www.ofa-titanium.com/product/titan/ti64.html) what kinds of geometry of Ti-6Al-4V are possible. |
|
034 |
2013 Dec. 10 |
C. Tokoku, T. Suzuki |
Urgent! Ti-6Al-4V bar will be delivered tomorrow. Other parts are at ICRR. Suzuki-san will bring stainless wire in this week. |
Material |
Tokoku-san prepares the mockup to research how to install wire between room and cryogenic temperature by end of next week. First of all, she checks where it will be in 101. Duct could be made from plastic. Wire is titan or its alloy. Suzuki-san prepares the stainless wire. |
20 Dec. 2013 |
035 |
2013 Dec. 10 |
|
Urgent! Kazuhiro consults with Ettore. |
Material |
Monitor system to check whether the wire between room and cryogenic temperature touches the cryoduct. |
|
036 |
2013 Dec. 10 |
T. Suzuki, S. Koike |
Urgent! |
Material |
Suzuki-san checks result of Koike-san’s calculation to evaluate the deformation of radiation shield after evacuation for design of cryoduct on radiation shield top. |
|
037 |
2013 Dec. 10 |
Y. Sakakibara |
Closed. He summarized. Calculation of thermal radiation from SAS hole |
Material |
Yusuke calculate how the radiation into shield depends on the diameter of cryoduct. |
17 Dec. 2013 |
038 |
2013 Dec. 10 |
D. Chen, R. Takahashi, T. Sekiguchi, E. Majorana |
Closed. He summarized result Cryogenic meeting status report on 2013/12/17 (Control). The mass moved by stepping motor is on the order of kg. |
Control |
Dan will consult Takanori, Ryutaro and Ettore (how to evaluate the requirement for stepping motor for Type B or Virgo ? ) |
17 Dec. 2013 |
039 |
2013 Dec. 10 |
T. Suzuki |
Closed. He reported AdhesiveTest. He recommends Nitofix. ->(#044). Othrewise, Araldite rapid. |
Control |
Suzuki-san reports the strength of glue for coil-magnet actuator in the next meeting. |
17 Dec. 2013 |
040 |
2013 Dec. 17 |
R. Kumar, D. Chen |
Urgent! |
Sapphire monolithic suspension |
”First design” of intermediate mass: Rahul fixs the details of sapphire blade springs. He will give information to Dan. Dan considers how blade spring and stage of stepping motor will be installed in intermediate mass and he evaluates moment of inertia. |
25 Dec. 2013 |
041 |
2013 Dec. 17 |
S. Koike |
Urgent! |
Sapphire monolithic suspension |
Koike-san considers whether “cross structure” of sapphire blade spring is possible or not. If necessary, he adjusts the shape of blade spring. But if we need drastic improvement, we forget this idea. |
25 Dec. 2013 |
042 |
2013 Dec. 17 |
R. Kumar, A. Khalaidovski |
Urgent! |
Sapphire monolithic suspension |
Rahul improves the design of blade spring. Sascha will order. |
25 Dec. 2013 |
043 |
2013 Dec. 17 |
K. Yamamoto |
Urgent! |
Overall design |
Kazuhiro will ask Takashi Uchiyama how much CLIO suspension rotates during cooling.Kazuhiro Yamamoto summarizes the requirement of dynamic range of mirror position and yaw rotation because the top of Type A must be adjusted for this purpose. He also asks Takashi what happened in CLIO. |
25 Dec. 2013 |
044 |
2013 Dec. 17 |
T. Suzuki |
Urgent! Suzuki-san will reserve the out gas measurement system at KEK. For baking, the spacer between magnet and mirror is necessary because baking mirror with glued magnet causes contamination. |
Control |
Suzuki-san asks Saito-san whether Nitofix is ultra high vacuum compatible. |
25 Dec. 2013 |