Proceedings of Gravitational-waves Science&Technology Symposium — PoS(GRASS2018)最新文献

Adaptive optics methods in gravitational wave interferometric detectors, a perspective 自适应光学方法在引力波干涉探测器中的应用

Proceedings of Gravitational-waves Science&Technology Symposium — PoS(GRASS2018) Pub Date : 2018-09-17 DOI: 10.22323/1.325.0008

M. Lorenzini, L. Aiello, E. Cesarini, V. Fafone, D. Lumaca, Y. Minenkov, I. Nardecchia, A. Rocchi, V. Sequino

{"title":"Adaptive optics methods in gravitational wave interferometric detectors, a perspective","authors":"M. Lorenzini, L. Aiello, E. Cesarini, V. Fafone, D. Lumaca, Y. Minenkov, I. Nardecchia, A. Rocchi, V. Sequino","doi":"10.22323/1.325.0008","DOIUrl":"https://doi.org/10.22323/1.325.0008","url":null,"abstract":"The performance of present and future gravitational wave detectors is limited by fundamental \u0000factors, such as thermal noise, seismic or newtonian noise and quantum nature of light. Besides, \u0000technological factors impact the reach of advanced detectors in that upgrade strategies are \u0000limited by state-of-art performances. In the realm of optics, the quantum limit to sensitivity \u0000will be addressed by injecting higher laser power and by exploiting the capabilities of squeezed \u0000light. In turn, technological efforts in the preparation of suitable optics able to meet more and \u0000more demandig requirements are ongoing. Moreover, solutions to mitigate the effect of known \u0000showstoppers such as parametric instablities are being studied. \u0000The present day strategy to correct for residual cold defects in the core optics and to counteract \u0000the thermal effects due to power absorption is embedded in a set of sensors and actuators \u0000integrated in the Advanced Virgo design, the so called Thermal Compensation System (TCS). \u0000This system is designed to be focused on the needs of high power operation of the detector, \u0000nonetheless it is highly versatile and can deal with foreseen and unexpected issues. We discuss \u0000the features of the TCS with emphasis on its versatility and portability to upgraded detectors; we \u0000also present the status of the R&D activity in the Tor Vergata labs, highlighting new applications \u0000where the methods of TCS can have a relevant impact, such as adaptive mode matching for \u0000squeezing and damping of parametric instabilities.","PeriodicalId":147125,"journal":{"name":"Proceedings of Gravitational-waves Science&Technology Symposium — PoS(GRASS2018)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129982334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Virgo Coating Collaboration: a detailed study on thermoelasticity in crystalline materials and other research lines 处女座涂层合作:晶体材料和其他研究领域热弹性的详细研究

Proceedings of Gravitational-waves Science&Technology Symposium — PoS(GRASS2018) Pub Date : 2018-09-17 DOI: 10.22323/1.325.0006

E. Cesarini, M. Lorenzini, A. Amato, G. Cagnoli, Q. Cassar, J. Dickmann, M. Granata, V. Fafone, D. Heinert, S. Kroker, D. Lumaca, F. Martelli, L. Mereni, R. Nawrodt, F. Piergiovanni, C. B. R. Hurtado

{"title":"The Virgo Coating Collaboration: a detailed study on thermoelasticity in crystalline materials and other research lines","authors":"E. Cesarini, M. Lorenzini, A. Amato, G. Cagnoli, Q. Cassar, J. Dickmann, M. Granata, V. Fafone, D. Heinert, S. Kroker, D. Lumaca, F. Martelli, L. Mereni, R. Nawrodt, F. Piergiovanni, C. B. R. Hurtado","doi":"10.22323/1.325.0006","DOIUrl":"https://doi.org/10.22323/1.325.0006","url":null,"abstract":"The visibility distance of interferometric gravitational wave detectors is limited by mirror thermal \u0000noise at mid-range frequency, where the first coalescence GW signals have been detected and \u0000where many others are expected in the next future. In particular, for enhanced second generation \u0000and third generation we need to increase the performance of the test mass multilayer reflective \u0000coatings. The Virgo collaboration is setting up a coating R&D group on many issues, including \u0000especially metrology (loss angle measurements, thermoelastic effect modeling), new materials \u0000(new oxides, nitrates, fluoride, new cosputtered mixing and nanolayered composites) completely \u0000characterized (optically, mechanically and morphologically), optimization of deposition parameters, \u0000with the aim of developing new coating materials and technologies for the AdVirgo upgrades \u0000and for future detectors. Another objective is to understand the losses in amorphous materials, \u0000framing coating research in the more general context of the physics of glasses and amorphous \u0000materials. One of the developed research lines is the study of thermoelastic damping in crystalline \u0000materials, that are promising candidates for cryogenic test masses and particularly suitable \u0000substrates for coating research. A detailed discussion on models, based on a semi-analytical calculation \u0000starting from the heat diffusion equation, for crystalline substrates will be reported. A \u0000new study on the changes in thermoelastic loss after coating deposition, with some preliminary \u0000results, will be also reported.","PeriodicalId":147125,"journal":{"name":"Proceedings of Gravitational-waves Science&Technology Symposium — PoS(GRASS2018)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133822808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

PETER: a torsion pendulum facility to study small forces/torques on free falling instrumented masses 彼得:一个扭摆装置，用来研究自由下落的仪器质量上的小力/力矩

Proceedings of Gravitational-waves Science&Technology Symposium — PoS(GRASS2018) Pub Date : 2018-09-13 DOI: 10.22323/1.325.0019

F. Garufi, M. Bassan, A. Cavalleri, M. D. Laurentis, F. Marchi, R. Rosa, L. Fiore, R. Dolesi, N. Finetti, A. Grado, M. Hueller, L. Marconi, L. Milano, Y. Minenkov, G. Pucacco, R. Stanga, D. Vetrugno, M. Visco, S. Vitale, W. Weber

{"title":"PETER: a torsion pendulum facility to study small forces/torques on free falling instrumented masses","authors":"F. Garufi, M. Bassan, A. Cavalleri, M. D. Laurentis, F. Marchi, R. Rosa, L. Fiore, R. Dolesi, N. Finetti, A. Grado, M. Hueller, L. Marconi, L. Milano, Y. Minenkov, G. Pucacco, R. Stanga, D. Vetrugno, M. Visco, S. Vitale, W. Weber","doi":"10.22323/1.325.0019","DOIUrl":"https://doi.org/10.22323/1.325.0019","url":null,"abstract":"We describe here the realization and tests of a two stage torsion pendulum facility (nicknamed \u0000PETER, from Italian PEndolo Traslazionale E Rotazionale, namely translational and Rotational \u0000Pendulum) for the measurement of the Gravitational Reference Sensor (GRS) actuation Cross \u0000Talks (CT) for LISA-Pathfinder and its possible evolution. This project started within the ground \u0000testing activities for the characterization, before flight, of the GRS of LISA-Pathfinder, where \u0000it showed results consistent with what observed on flight. The apparatus could easily evolve to \u0000a facility to test small forces/torques on free falling instrumented masses, for future next generation \u0000space missions. Here, we will discuss the principle of operation of the double torsion \u0000pendulum and the initial goal of the activity, the description of the PETER apparatus, cross -talk \u0000measurement technique and results and possible extension to more than 2 DoF","PeriodicalId":147125,"journal":{"name":"Proceedings of Gravitational-waves Science&Technology Symposium — PoS(GRASS2018)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117328591","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Challenges of gravitational wave detection using long-baseline cavity-assisted large momentum transfer atom interferometry 利用长基线腔辅助大动量转移原子干涉法探测引力波的挑战

Proceedings of Gravitational-waves Science&Technology Symposium — PoS(GRASS2018) Pub Date : 2018-08-23 DOI: 10.22323/1.325.0016

M. Dovale-Álvarez, Daniel D. Brown, A. Jones, C. Mow-Lowry, H. Miao, A. Freise

{"title":"Challenges of gravitational wave detection using long-baseline cavity-assisted large momentum transfer atom interferometry","authors":"M. Dovale-Álvarez, Daniel D. Brown, A. Jones, C. Mow-Lowry, H. Miao, A. Freise","doi":"10.22323/1.325.0016","DOIUrl":"https://doi.org/10.22323/1.325.0016","url":null,"abstract":"Atom interferometers employing optical cavities to enhance the beam splitter pulses promise significant advances in science and technology, notably for future gravitational wave detectors. Long cavities, on the scale of hundreds of meters, have been proposed in experiments aiming to become demonstrators for gravitational wave detection at frequencies below 1 Hz, where laser interferometers, such as LIGO, have poor sensitivity. Our group at the Birmingham Institute of Gravitational Wave Astronomy has explored the fundamental limitations of two-mirror cavities for atomic beam splitting, and established upper bounds on the temperature of the atomic ensemble as a function of cavity length and three design parameters: the cavity $g$-factor, the bandwidth, and the optical suppression factor of the first and second order spatial modes. A lower bound to the cavity bandwidth which avoids elongation of the interaction time and maximizes power enhancement was found. An upper limit to cavity length is also found for symmetric two-mirror cavities. These key limitations impact the feasibility of long-baseline detectors, which suffer from a naturally larger bandwidth and worse optical suppression of higher order optical modes. Our findings will aid the design of current and future experiments using this technology, such as the MIGA experiment in Bordeaux. In the future we aim to fully model the effect that the imperfect optical wavefronts have on the atomic transitions.","PeriodicalId":147125,"journal":{"name":"Proceedings of Gravitational-waves Science&Technology Symposium — PoS(GRASS2018)","volume":"16 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131070334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Matter ejection and kilonova emission from binary neutron star mergers 双中子星并合的物质抛射和千新星发射

Proceedings of Gravitational-waves Science&Technology Symposium — PoS(GRASS2018) Pub Date : 2018-08-23 DOI: 10.22323/1.325.0033

A. Perego

引用次数: 0

Searching electromagnetic counterpart of gravitational waves 寻找引力波的电磁对应物

Proceedings of Gravitational-waves Science&Technology Symposium — PoS(GRASS2018) Pub Date : 2018-07-19 DOI: 10.22323/1.325.0037

Shengqi Yang

引用次数: 0

Unravelling the progenitors of merging black hole binaries 解开合并黑洞双星的起源

Proceedings of Gravitational-waves Science&Technology Symposium — PoS(GRASS2018) Pub Date : 2018-07-19 DOI: 10.22323/1.325.0027

N. Giacobbo, M. Mapelli, M. Spera

引用次数: 1

Thermal noise in complex systems 复杂系统中的热噪声

Proceedings of Gravitational-waves Science&Technology Symposium — PoS(GRASS2018) Pub Date : 2018-07-19 DOI: 10.22323/1.325.0010

R. Glaser, Klara T. Knupfer, L. Maczewsky, Max Mausezahl, R. Nawrodt, G. Cole, J. Dickmann, S. Kroker

引用次数: 0

LISA as a probe for particle physics: electroweak scale tests in synergy with ground-based experiments LISA作为粒子物理的探测器:与地面实验协同的电弱尺度测试

Proceedings of Gravitational-waves Science&Technology Symposium — PoS(GRASS2018) Pub Date : 2018-06-17 DOI: 10.22323/1.325.0036

Daniel G. Figueroa, E. Megías, G. Nardini, M. Pieroni, M. Quirós, A. Ricciardone, G. Tasinato

{"title":"LISA as a probe for particle physics: electroweak scale tests in synergy with ground-based experiments","authors":"Daniel G. Figueroa, E. Megías, G. Nardini, M. Pieroni, M. Quirós, A. Ricciardone, G. Tasinato","doi":"10.22323/1.325.0036","DOIUrl":"https://doi.org/10.22323/1.325.0036","url":null,"abstract":"We forecast the prospective of detection for a stochastic gravitational wave background sourced by cosmological first-order phase transitions. We focus on first-order phase transitions with negligible plasma effects, and consider the experimental infrastructures built by the end of the LISA mission. We make manifest the synergy among LISA, pulsar time array experiments, and ground-based interferometers. For phase transitions above the TeV scale or below the electroweak scale, LISA can detect the corresponding gravitational wave signal together with Einstein Telescope, SKA or even aLIGO-aVIRGO-KAGRA. For phase transitions at the electroweak scale, instead, LISA can be the only experiment observing the gravitational wave signal. In case of detection, by using a parameter reconstruction method that we anticipate in this work, we show that LISA on its own has the potential to determine when the phase transition occurs and, consequently, the energy scale above which the standard model of particle physics needs to be modified. The result may likely guide the collider community in the post-LHC era.","PeriodicalId":147125,"journal":{"name":"Proceedings of Gravitational-waves Science&Technology Symposium — PoS(GRASS2018)","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115282283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

Star Cluster Disruption by a Supermassive Black Hole Binary 超大质量黑洞双子星对星团的破坏

Proceedings of Gravitational-waves Science&Technology Symposium — PoS(GRASS2018) Pub Date : 2018-05-17 DOI: 10.22323/1.325.0030

E. Bortolas, M. Mapelli, M. Spera

{"title":"Star Cluster Disruption by a Supermassive Black Hole Binary","authors":"E. Bortolas, M. Mapelli, M. Spera","doi":"10.22323/1.325.0030","DOIUrl":"https://doi.org/10.22323/1.325.0030","url":null,"abstract":"Massive black hole binaries (BHBs) are expected to form as the result of galaxy mergers; they shrink via dynamical friction and stellar scatterings, until gravitational waves (GWs) bring them to the final coalescence. It has been argued that BHBs may stall at a parsec scale and never enter the GW stage if stars are not continuously supplied to the BHB loss cone. Here we perform several N-body experiments to study the effect of an 80,000 solar masses stellar cluster (SC) infalling on a parsec-scale BHB. We explore different orbital elements for the SC and we perform runs both with and without accounting for the influence of a rigid stellar cusp (modelled as a rigid Dehnen potential). We find that the semi-major axis of the BHB shrinks by more than 10 per cent if the SC is on a nearly radial orbit; the shrinking is more efficient when a Dehnen potential is included and the orbital plane of the SC coincides with that of the BHB. In contrast, if the SC orbit has non-zero angular momentum, only a few stars enter the BHB loss cone and the resulting BHB shrinking is negligible. Our results indicate that SC disruption might significantly contribute to the shrinking of a parsec-scale BHB only if the SC approaches the BHB on a nearly radial orbit.","PeriodicalId":147125,"journal":{"name":"Proceedings of Gravitational-waves Science&Technology Symposium — PoS(GRASS2018)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124014135","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0