ICALEPCS2013 - List of Authors (Miyakawa, O.)

Paper

Title

Page

Real Time Control for KAGAR, 3km Cryogenic Gravitational Wave Detector in Japan

23

O. Miyakawa
ICRR, Chiba, Japan

KAGRA is a 3km cryogenic interferometer for gravitational wave detection located underground Kamioka-mine in Japan. The next generation large scale interferometric gravitational wave detectors require very complicated control topologies for the optical path length between mirrors, and very low noise feedback controls in order to detect an extremely tiny motion between mirrors excited by gravitational waves. The interferometer consists of a Michelson interferometer with Fabry-Perot cavities on its arms, and other two mirrors as, so called, a power recycling and a resonant sideband extraction technique. In total, 5 degrees of freedom for length between 7 mirrors should be controlled at a time, and the control must be continuously kept during the observation of gravitational waves. We are currently developing a real time controls system using computers for KAGRA. In this talk, we report how the control system works.

Slides MOCOAAB07 [8.536 MB]

TUPPC090

Digital Control System of High Extensibility for KAGRA

794

H. Kashima, N. Araki, M. Ishizuka, T. Masuoka, H. Mukai
Hitachi Zosen, Osaka, Japan
O. Miyakawa
ICRR, Chiba, Japan

KAGRA is the large scale cryogenic gravitational wave telescope project in Japan which is developed and constructed by ICRR. of The University of Tokyo. Hitz Hitachi Zosen produced PCI Express I/O chassis and the anti-aliasing/anti-imaging filter board for KAGRA digital control system. These products are very important for KAGRA interferometer from the point of view of low noise operations. This paper reports the performance of these products.

Poster TUPPC090 [0.487 MB]

Paper	Title	Page
MOCOAAB07	Real Time Control for KAGAR, 3km Cryogenic Gravitational Wave Detector in Japan	23
	O. Miyakawa ICRR, Chiba, Japan
	KAGRA is a 3km cryogenic interferometer for gravitational wave detection located underground Kamioka-mine in Japan. The next generation large scale interferometric gravitational wave detectors require very complicated control topologies for the optical path length between mirrors, and very low noise feedback controls in order to detect an extremely tiny motion between mirrors excited by gravitational waves. The interferometer consists of a Michelson interferometer with Fabry-Perot cavities on its arms, and other two mirrors as, so called, a power recycling and a resonant sideband extraction technique. In total, 5 degrees of freedom for length between 7 mirrors should be controlled at a time, and the control must be continuously kept during the observation of gravitational waves. We are currently developing a real time controls system using computers for KAGRA. In this talk, we report how the control system works.
	Slides MOCOAAB07 [8.536 MB]

TUPPC090	Digital Control System of High Extensibility for KAGRA	794
	H. Kashima, N. Araki, M. Ishizuka, T. Masuoka, H. Mukai Hitachi Zosen, Osaka, Japan O. Miyakawa ICRR, Chiba, Japan
	KAGRA is the large scale cryogenic gravitational wave telescope project in Japan which is developed and constructed by ICRR. of The University of Tokyo. Hitz Hitachi Zosen produced PCI Express I/O chassis and the anti-aliasing/anti-imaging filter board for KAGRA digital control system. These products are very important for KAGRA interferometer from the point of view of low noise operations. This paper reports the performance of these products.
	Poster TUPPC090 [0.487 MB]