Design and construction of a prototype of a flat top beam interferometer and initial tests

被引：5

作者：

Agresti, J. ^{[1
]}

D'Ambrosio, E. ^{[2
]}

DeSalvo, R. ^{[2
]}

Forest, D. ^{[3
]}

Lagrange, B. ^{[3
]}

Mackowski, J. M. ^{[3
]}

Michel, C. ^{[3
]}

Montorio, J. L. ^{[3
]}

Morgado, N. ^{[3
]}

Pinard, L. ^{[3
]}

Remillieux, A. ^{[3
]}

Simoni, B. ^{[1
]}

Tarallo, M. ^{[1
]}

Willems, P. ^{[2
]}

机构：

[1] Univ Pisa, Largo Pontecorvo 3, Pisa, Italy

[2] CALTECH, LIGO Lab, Pasadena, CA 91125 USA

[3] Lab Mat Avances, 22 Bd Niels Bohr, Villeurbanne, France

来源：

SIXTH EDOARDO AMALDI CONFERENCE ON GRAVITATIONAL WAVES | 2006年 / 32卷

基金：

美国国家科学基金会;

关键词：

D O I：

10.1088/1742-6596/32/1/045

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A non-Gaussian, flat-top laser beam profile, also called Mesa Beam Profile, supported by non spherical mirrors known as Mexican Hat (MH) mirrors, has been proposed as a way to depress the mirror thermal noise and thus improve the sensitivity of future interferometric Gravitational Wave detectors, including Advanced LIGO [1]. Non-Gaussian beam configurations have never been tested before [2] hence the main motivation of this project is to demonstrate the feasibility of this new concept. A 7m rigid suspended Fabry-Perot (FP) cavity which can support a scaled version of a Mesa beam applicable to the LIGO interferometers has been developed. The FP cavity prototype is being designed to prove the feasibility of actual MH mirror profiles, determine whether a MH mirror cavity is capable of transforming an incoming Gaussian beam into a flat top beam profile, study the effects of unavoidable mirror imperfections on the resulting beam profile and gauge the difficulties associated with locking and maintaining the alignment of such an optical cavity. We present the design of the experimental apparatus and simulations comparing Gaussian and Mesa beams performed both with ideal and current (measured) mirror profiles. An overview of the technique used to manufacture this kind of mirror and initial results showing Mesa beam properties are presented.

引用

页数：8

共 11 条

[1]

Agresti J., G050041 00 Z 2005 AS

[2]

Agresti J., LIGOT04022500R DOCT

[3]

[Anonymous], LIGOD05028600D

[4]

Cella G., 2002, NUCL INSTRUMENTS M A, V487

[5] Nonspherical mirrors to reduce thermoelastic noise in advanced gravitational wave interferometers [J].

D'Ambrosio, E .

PHYSICAL REVIEW D, 2003, 67 (10)

[6] Advanced LIGO: non-Gaussian beams [J].

D'Ambrosio, E ;

O'Shaugnessy, R ;

Thorne, K ;

Willems, P ;

Strigin, S ;

Vyatchanin, S .

CLASSICAL AND QUANTUM GRAVITY, 2004, 21 (05) :S867-S873

[7]

D'Ambrosio E., PHYS REV

[8] Second generation instruments for the laser interferometer gravitational wave observatory (LIGO) [J].

Fritschel, P .

GRAVITATIONAL-WAVE DETECTION, 2003, 4856 :282-291

[9]

Simoni B., 2004, LIGOP04002500D U PIS

[10]

Tarallo M., THESIS

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