Vibration-Free Pulse Tube Cryocooler System for Gravitational Wave Detectors, Part II: Cooling Performance and Vibration

Li, R.; Ikushima, Yuki; Koyama, Tomohiro; Tomaru, T.; Suzuki, Toshikazu; Haruyama, T.; Shintomi, T.; Yamamoto, A.

doi:10.1007/0-387-27533-9_87

Cited by 14 publications

(11 citation statements)

References 5 publications

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“…One cavity is used for the laser frequency stabilization, while the other is used for extraction of gravitational wave signals. The test masses are cooled via suspension wires by silent pulsetube cryocoolers developed for the CLIO [4,[37][38][39]. Heat links between the cryogenic shield and an upper suspension stage consist of aluminum wires with a purity of 99.999%.…”

Section: Clio Interferometermentioning

confidence: 99%

Status of Japanese gravitational wave detectors

Arai

Takahashi

Tatsumi

et al. 2009

Class. Quantum Grav.

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The Large-scale Cryogenic Gravitational wave Telescope (LCGT) is planned as a future Japanese project for gravitational wave detection. A 3 km interferometer will be built in an underground mine at Kamioka. Cryogenic sapphire mirrors are going to be employed for the test masses. For the demonstration of LCGT technologies, two prototype interferometers, TAMA300 and CLIO, are being developed. This paper describes the current status of the LCGT project and the two prototype interferometers.

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Section: Clio Interferometermentioning

confidence: 99%

Status of Japanese gravitational wave detectors

Arai

Takahashi

Tatsumi

et al. 2009

Class. Quantum Grav.

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“…The development at SHI of pulse tube cryocoolers has focused primarily on cooling capacity, low vibration and long life [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Study of low vibration 4 K pulse tube cryocoolers

Xu¹,

Nakano²,

Saito³

et al. 2012

AIP Conference Proceedings

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Sumitomo Heavy Industries, Ltd. (SHI) has been continuously improving the efficiency and reducing the vibration of a 4 K pulse tube cryocooler. One advantage of a pulse tube cryocooler over a GM cryocooler is low vibration. In order to reduce vibration, both the displacement and the acceleration have to be reduced. The vibration acceleration can be reduced by splitting the valve unit from the cold head. One simple way to reduce vibration displacement is to increase the wall thickness of the tubes on the cylinder. However, heat conduction loss increases while the wall thickness increases. To overcome this dilemma, a novel concept, a tube with non-uniform wall thickness, is proposed. Theoretical analysis of this concept, and the measured vibration results of an SHI lowvibration pulse tube cryocooler, will be introduced in this paper.

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“…Coil-magnet actuators are set for the front mirror in the perpendicular cavity only, so as to keep the optical path length of the cavity locked. Until now, cryogenic systems have been developed [11][12][13] and progressed [14]. Thus, cooling mirrors were realized [15].…”

Section: Configuration Of Cliomentioning

confidence: 99%

Thermal-noise-limited underground interferometer CLIO

Agatsuma

Arai

Fujimoto

et al. 2010

Class. Quantum Grav.

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We report on the current status of CLIO (Cryogenic Laser Interferometer Observatory), which is a prototype interferometer for LCGT (large scale cryogenic gravitational-wave telescope). LCGT is a Japanese next-generation interferometric gravitational-wave detector featuring the use of cryogenic mirrors and a quiet underground site. The main purpose of CLIO is to demonstrate a reduction of the mirror thermal noise by cooling the sapphire mirrors. CLIO is located in an underground site of the Kamioka mine, 1000 m deep from the mountain top, to verify its advantages. After a few years of commissioning work, we have achieved a thermal-noise-limited sensitivity at room temperature. One of the main results of noise hunting was the elimination of thermal noise caused by a conductive coil holder coupled with a pendulum through magnets.

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Vibration-Free Pulse Tube Cryocooler System for Gravitational Wave Detectors, Part II: Cooling Performance and Vibration

Cited by 14 publications

References 5 publications

Status of Japanese gravitational wave detectors

Status of Japanese gravitational wave detectors

Study of low vibration 4 K pulse tube cryocoolers

Thermal-noise-limited underground interferometer CLIO

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