11111 k. yamamoto a, t. miyamoto a, h. tanaka a, t. uchiyama a, s. zeidler b, a. hagiwara c, n....
TRANSCRIPT
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K. YamamotoA, T. MiyamotoA, H. TanakaA, T. UchiyamaA, S. ZeidlerB, A. HagiwaraC, N. KimuraC, R. KumarC, T. KumeC, I. MurakamiC, T. SuzukiC,
S. TerashimaC, T. TomaruC, S. TakadaD, E. MajoranaE, L. NaticchioniE,K. CraigF, A. CummingF, R. DouglasF, G. HammondF , K. HaughianF,
I. MartinF, P. MurrayF, S. RowanF , D. HeinertG, G. HofmannG, J. KommaG, S. KrokerG, R. NawrodtG, C. SchwarzG
ICRR.UTA, NAOJB, KEKC, NIFSD, INFNE, University of GlasgowF, Friedrich-Schiller-Universitaet JenaG
Development of cryogenic payload
for KAGRA VII
2015 September 27The meeting of Physical Society of Japan
@Sugimoto campus, Osaka City University, Osaka, Osaka
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KAGRA Cryogenics Group
Toshikazu SUZUKI EO and SEO member KEK, Senior Fellow
Nobuhiro KIMURA Cryostat sub-chief KEK, Assoc. Prof.
Kazuhiro YAMAMOTO Cryo-Payload sub-chief ICRR, Project Assist. Prof.
Takayuki TOMARU Chief KEK, Assoc. Prof.
Tatsuya KUME Surveying, Alignment KEK, Assoc. Prof.
Rahul KUMAR Simulation, Payload KEK, PD
Ayako HAGIWARA CAD KEK, Technical Staff
Shinichi TERASHIMA Machining KEK, Technical Staff
Iwao MURAKAMI Welding, Assembly KEK, Technical Staff
Hiroki TANAKA Cryo-Payload, Q ICRR, Grad. Student
Takahiro MIYAMOTO Cryo-Payload ICRR, Grad. Student
Suguru TAKADA Cryogenics NIFS, Assist. Prof.
2015.Aug.27
By T. Tomaru(Revised by K. Yamamoto)
Kieran CRAIG Payload ICRR, PD
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0. Abstract
Here, I explain
Current status and next step for (1) Sapphire suspension(2) Cryogenic payload
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Contents
1. Introduction2. Sapphire suspension3. Cryogenic payload 4. Summary
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1. Introduction
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3km3km
MozumiY-end Sakonishi
X-end
AtotsuCenter
Vibration isolation system (Type A), Cryocooler unit, Cryostat, Cryogenic payload
Schematic view of KAGRA interferometer
Four mirrors of arm cavity will be cooled.
Kamioka mine (Underground site)
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1. Introduction
6666
14 m
Vacuum ducts
along laser beam
Vibration isolation system(room
temperature)
Clean booth
Design drawing with tunnel and cross section
Cryostat(Here is a mirror)
2nd floor
Shaft
A. Hagiwara
Outline of vibration isolation and cryostat
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1. Introduction
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Pulse tube cryocoolers
Pulse tube cryocoolers
Sapphire suspension
Sapphire mirror (About 20K)
Sapphire fiber
Schematic view of cryo-payload
Cryo-payload
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“Sapphire monolithic lop-eared suspension”
One of the most importantparts of KAGRA : Main sapphire mirrorsare included.
All parts are made from sapphire.
Sapphire lop-eared suspension
2. Sapphire suspension
fiber break
Hydroxide Catalysis Bonding
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2. Sapphire suspension
9A. Hagiwara
EarNail head of fiber
Fiber with nail head on both ends
Blade spring(compensation of fiber length difference)
Mirror
Flat cut
Sapphire lop-eared suspension
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2. Sapphire suspension
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Hydroxide Catalysis Bonding
When fibers are broken, they can be removed !
Sapphire lop-eared suspension
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Current status
2. Sapphire suspension
We investigated almost all components. Measurement of Q-values of sapphire fiber is still in progress.
We must construct full size suspension (as prototype). Simpler (one fiber) prototype test is in progress.
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All sapphire parts for full size prototype have already been delivered (IMPEX and Shinkosha).
Sapphire cylinder with flat cuts as dummy mirror
Blade spring
2. Sapphire suspension
Ears
Fibers with nail head
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Jigs to assemble full size prototype (sapphire suspension) is being prepared(R. Kumar, K. Craig).
2. Sapphire suspension
K. Craig
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2. Sapphire suspension One fiber prototype simpler prototype (easier assembly) to check, for example, strength, bonding, and so on …
Sapphire blade spring
6kg sapphire mass(1/4 of KAGRA mirror)
Sapphire fiber
H. Tanaka proceeds with experiment.
D. Chen
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2. Sapphire suspension
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Sapphire blade spring6kg mass (copper)(1/4 of KAGRA mirror)
Nail head of sapphire fiber
One fiber prototype
Support frame
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2. Sapphire suspension One fiber prototype
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Sapphire mass
Sapphire blade spring
Dummy Cu wire
D. Chen, J. Komma, H. Tanaka, Y. Liu
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2. Sapphire suspension
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One fiber prototype
Now, it is in cryostat and first (primitive) cooling test is in progress.
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2. Sapphire suspension
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Measurement of Q-values of sapphire fiber
Next talk (H. Tanaka)
Q-value of 350 mm length fiber for KAGRA is not measured yet.
Short (100mm) fiber measurement suggests clamp for fiber brings loss and reduce measured Q-values.
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Outline of vibration isolation and cryostat
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Pulse tube cryocoolers
Pulse tube cryocoolers
3. Cryogenic payload
Cryo-payload
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Outline of cryogenic payload
2020202020
3. Cryogenic payload
Marionette
Intermediate mass
Sapphire Mirror
Platform
Recoil mass chain
Mirror chain
http://gwdoc.icrr.u-tokyo.ac.jp/cgi-bin/private/DocDB/ShowDocument?docid=2106
Thermal noise caused by recoil mass chain is small.
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Outline of cryogenic payload
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3. Cryogenic payload
Marionette
Intermediate mass
Sapphire Mirror
PlatformGAS filer for vertical vibration isolation(Mirror chain is suspended)
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Outline of cryogenic payload
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3. Cryogenic payload
Marionette
Intermediate mass
Sapphire Mirror
PlatformAlignment adjustment system
Simple system for high Q-value of sapphire suspension
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Outline of cryogenic payload
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3. Cryogenic payload
Marionette
Intermediate mass
Sapphire Mirror
Platform
Sensor and actuator (for control and damping)
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Design
A. Hagiwara proceeds with CAD design drawings. Almost all parts except for platformwere designed.Design is based on discussion with Vibration Isolation subgroup of KAGRA.
A. HagiwaraMirror
Platform
Intermediate mass
3. Cryogenic payload
Marionette
Without recoil chain
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Design
A. Hagiwara proceeds with CAD design drawings. Almost all parts except for platformwere designed.
A. Hagiwara
Recoil mass for intermediate mass
Recoil mass for mirror
3. Cryogenic payload
Recoil mass for Marionette
With recoil chain
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Prototype test of cryogenic payload Two differences from actual one
Platform does NOT include GAS filter.
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3. Cryogenic payload
Mirror and fibers are NOT made from sapphire, but metal.
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Dummy Mirror (and recoil mass)
Intermediate mass
3. Cryogenic payload
Marionette
Without recoil chainPrototype test of cryogenic payload Marionette, Intermediate mass,Dummy mirror, Recoil mass For (dummy mirror) has already been delivered.
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Dummy mirror and ears (stainless)
220 mm
150 mm
Recoil mass Ears (stainless)
Size and weight are the same as those of KAGRA mirror.
23 kg
3. Cryogenic payload Prototype test of cryogenic payload
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2929292929292929 Intermediate massMarionette
Dummy blade spring
3. Cryogenic payload Prototype test of cryogenic payload(VIC international)
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3. Cryogenic payload
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Prototype test of cryogenic payloadT. Miyamto assembled !
He is developing(1) alignment adjustment system of Marionette(2) displacement sensor for control and damping(3) coil magnet actuator for sapphire mirror
They should work around 20 K.
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4. Summary Sapphire lop-eared suspension Assembly jig for full size prototype are being prepared. (Simpler) one fiber prototype First cooling test is in progress. Measurement of Q-values of sapphire fiber Next talk by H. TanakaCryogenic payload Almost all parts except for platform were designed. Parts of mirror chain were assembled. T. Miyamoto is developing system to adjust or control cryogenic payload.
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Acknowledgement
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ELiTES: ET-LCGT interferometric Telescope Exchange of Scientists Grant for collaboration about cryogenic between KAGRA and ET European 7th Framework Programme Marie Curie action (Mar. 2012 - Feb. 2016)
European people can visit Japan for KAGRA.
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Thank you for your attention !
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4. Human resources
8 scientists2 graduate students (Master course)3 technical staffs
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4. Human resources Kieran Craig (from Glasgow) starts to work as postdoc in ICRR on the 1st of August ! (Payload, especially sapphire lop eared suspension)
Ph.D. defense was on last July ! “Studies of the mechanical dissipation of thin films for mirrors in interferometric gravitational wave detectors”
He has already worked for KAGRA as ELiTES guests.
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Backup
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6. Summary 1. Next step (by Spring 2016) Full size prototype at KEK and ICRR 2. By Spring 2017 Development of platform (GAS filter)3. By Summer 2017 Assembly and test of sapphire suspension4. In the second half of 2017 Installation at KAGRA site5. One postdoc joins one week later. KAGRA must take care of KEK people. Otherwise, they can not work for KAGRA after 2018.
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Schedule
3. Sapphire suspension
By Spring 2016 : Prototype test of full size sapphire suspension at ICRR By Autumn 2016 : Procurement of sapphire partsBy Spring 2017 : Assembly and test with End sapphire mirrorsBy Summer 2017 : Assembly and test with Front sapphire mirrors By End 2017 : Installation at KAGRA site
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Schedule
By Spring 2016 : Prototype test of full size prototype at KEK By Spring 2017 : Development of platform (GAS filter)By End 2017 : Installation at KAGRA site
3. Cryogenic payload
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4. Schedule
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4. Schedule
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Full size prototype at KEK and ICRR
Assembly and test of sapphire part
Installation of cryogenic payload
Procurement of sapphire parts
Development of platform (GAS filter)
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4. Schedule
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Cooling test of cryostatInstallation of Type A
Delivery of End sapphire mirrors
Delivery of Front sapphire mirrors
Installation of cryogenic payload
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Official schedule
iKAGRA observation : By end of 2015bKAGRA installation and commissioning : By end of 2017
5. Schedule
Current budget plan
By March 2016 : One cryogenic payloadsBy March 2017 : Three cryogenic payloads (+ spare)By end of 2017 : Commissioning of bKAGRA
Extremely short commissioning
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to SAS
View ports
Remote valve unit
4 Low vibration cryocooler unit
Main LASER beam
Cryostat Stainless steel t20mm Diameter 2.6m Height ~3.6m M ~ 10 ton
Cryo-coolers Pulse tube, 60Hz 0.9 W at 4K (2nd) 36 W at 50K (1st)
Outline of cryostatCryogenic
payload
Mirror
S. Koike
3. Cryogenic payload
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Outline of vibration isolation and cryostat
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Pulse tube cryocoolers
Pulse tube cryocoolers
Heat link (pure Al)Heat link (pure Al)
3. Cryogenic payload
Cryo-payload