Proposal by the new members from Toyama university

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Proposal by the new members from Toyama
university

• Fusakazu Matsushima
• and
• Yukinori Ono
• University of Toyama, Japan

KAGRA face to face meeting,, Kashiwa, Feb. 14,
2013
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in this talk 1. Overview University of
Toyama History with KAGRA Members of
colaboration 4 groups 2. Inroduction to each
group Laser Matsushima et al. Signal
analysis Hirobayashi et al. Theory
Kakizaki Sapphire Mirror Ono et al.
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• University of Toyama
• Faculty
• -------------
• Science 82 staffs
• Engineering 112 staffs
• Humanities
• Human Development
• Economics
• Art and Design
• Pharmacy
• Medicine
• many centers
• total 903 staffs

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1.Overview Location of Toyama
Toyama
Kamioka
Tokyo
Nagoya
Kamioka Toyama St. about 30km (about 40min.
driving on Root 41) from city border only few km
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Root 41 called as Nobel road
K.Tanaka (chem.)
Toyama
S. Tonegawa (med.)
Osawano
90km
more !
M. Koshiba (phys.)
Kamioka
Takayama
H. Shirakawa (chem.)
Root 41
R. Noyori (chem.) O. Shimomura (chem.) M.
Kobayashi (phys.) T. Masukawa (phys.)
Nagoya
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History of Toyama university and KAGRA about
10 years ago CLIO member (Prof. Ohashi et al)
had a lecture. Students (Nagano, Hayakawa,
..) work in this field. 2012 Jan. KAGRA
member (Prof. Kawamura et al.) had
lectures. 2012 July Univ. of Toyama and KAGRA
Group Joint workshop. Campus mailing list
toyama-kagra starts.
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Univ. of Toyama and KAGRA Group Joint workshop

July 7, 2012 in Toyama
Many staffs in the faculties of science and
engineering have much interest in KAGRA
project.
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• 2012 Sept.
• About 50 students of the physics department
  visited Kamioka.

2012 Oct. Demonstration of interferometer
in Campus Festival. President of Toyama
Univ. visited Kamioka.
2013 fiscal year Course lecture in the physics
dept. by Prof. Kawamura
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Four groups are now preparing 1. Laser 4
members Fusakazu Matsushima (P), Yoshiki
Moriwaki (P) Kaori Kobayashi (AP), Katsunari
Enomoto (AP) collaborator M1 students 2,
M2 students 2 2. Signal analysis 1
member Shigeki Hirobayashi (P) collaborator M1
student 1, M2 student 1 3. Theory 1 member
Mitsuru Kakizaki (A) 4. Sapphire Mirror 2
members Yukinori Ono (P), Tadahiro Hori
(A) (Pprofessor, ASassociate professor, A
assistant professor)
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1 Laser Input/Output system
Matsushima, Moriwaki, Kobayashi,
Enomoto (Microwave Laboratory, Laser Physics
Laboratory) Daily work Control of motion of
molecules ? ultracold molecule ?precise
spectroscopy? fundamental physics? electric
dipole moment of electron time evolution of
fundamental constants Spectroscopy of
interstellar molecules Collaboration with
KAGRA 2012 Dec. Discussion with Prof. Terada
and Prof. Kawamura ? 2013 Collaboration title
"RD for the intensity stabilization of the
laser system in KAGRA" To obtain more concrete
information on I/O system ? planning to visit
LIGO Hanford in this March (with the budget
by president of Univ. Toyama)
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1 Laser Input/Output system
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Gravitational Wave Detection Using Non-Harmonic
Analysis
2. Signal Analysis

• Organization
• Shigeki Hirobayashi
• (University of Toyama)
• Collaborators
• Seiji Kawamura (Tokyo)
• Hideyuki Tagoshi (Osaka)

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Background

• Signal processing
• Audio and speech signals
• Images
• Signals used in medical engineering
• Optical coherence tomography
• Invention
• New frequency analysis method
• Non-harmonic analysis (NHA)

Gravitational Wave Detection Using Non-Harmonic
Analysis
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Advantages of NHA 1
We compared the accuracy of frequency analysis
achieved by two approaches.
The accuracy of DFT analysis is relatively low
when the objective signal is not a multiple of
the fundamental frequency.
Method Accuracy
DFT 1 order of magnitude
NHA 10 or more orders of magnitude
The square error of each estimated parameter.
Better axail resolution can be expected when NHA
is used.
Gravitational Wave Detection Using Non-Harmonic
Analysis
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Advantages of NHA (contd.)
NHA
DFT
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Spectral components smaller than the sidelobe can
be extracted independently.
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OCT Image Based on NHA
Fixed mirror

• (a) DFT(FFT)
• (b) NHA

Reference Arm
?L1
?L2
Probe Arm
High Coherence Source
Sample
Coupler
l
c/?L
??
l Scan
t ? f
FFT
OCT signal
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OCT cross-sectional images of onion skin.
Depth
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Motivation

• Visualization of a gravitational wave
• Separation of gravitational waves from noise
• Time-Frequency Distribution

Gravitational Wave Detection Using Non-Harmonic
Analysis
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3. Theory
M. Kakizaki (Theoretical Physics
Laboratory) Collaborate as a member of Prof.
Kanda's Group 2013 thema "Study for KAGRA data
analysis and research for its system"
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Characterization of sapphire mirror for
KAGRAusing electron spin resonance

• Yukinori Ono
• University of Toyama

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Core optics of KAGRA
ETMY
Laser
MC1
MC3
ITMY
MT1
PRM
PR2
ITMX
ETMX
MT2
BS
PR3
SR2
MC2
f37cm
SRM
SR3
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Mirror for KAGRA

• ?????????????????
• ??(300K)??????????(????)????????
• ????????????????

Sapphire
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Requirements for Sapphire

• Sapphire
• C-axis mirrors (f25cm x t15cm) .
• Current f22cm?t15cm
• Absorption Cofficient lt 20 ppm/cm
• Current 50-100 ppm/cm?

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Sapphire Preliminary results
10 Samples from CSI have been measured
Name
Absorption ppm/cm
AA149 48 47
AC150 229 138 682 687
P401 34 32 65 67
preliminary
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Purpose of this project

• Clarifying the origin by ESR
• ESR Electron spin resonance
• Detecting unpaired spins gt 1010
• ?Sensitive to impurity and defects
• in single crystal

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Electron Spin Resonance

• X-band (Bruker)
• 3 300 K Cryostat (Oxford)

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Preliminary results
Ip-p
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Collaborators
Dr. Masahiro Hori, University of Toyama Prof.
Norikatsu Mio, The university of Tokyo Prof.
Seiji Kawamura, The university of Tokyo Mr.
Nobuhiro Fukumoto,The university of Tokyo