Zobrazeno 1 - 10
of 276
pro vyhledávání: '"Gundlach, J."'
Autor:
Ross, M. P., Fleischer, S. M., Paulson, I. A., Lamb, P., Iritani, B. M., Adelberger, E. G., Hagedorn, C. A., Venkateswara, K., Gettings, C., Shaw, E. A., Apple, S. K., Gundlach, J. H.
We searched for violations of the weak equivalence principle using a cryogenic torsion balance with a pendulum comprised of superconducting niobium and copper. We constrain the E\"otv\"os parameter with 95%-confidence to $\eta_{\text{Nb*-Cu}}~\leq~2.
Externí odkaz:
http://arxiv.org/abs/2407.21232
Autor:
Smith, G. L., Hoyle, C. D., Gundlach, J. H., Adelberger, E. G., Heckel, B. R., Swanson, H. E.
Publikováno v:
Physical Review D 61, 022001, 1999
We tested the equivalence principle at short length scales by rotating a 3-ton $^{238}$U attractor around a compact torsion balance containing Cu and Pb test bodies. The observed differential acceleration of the test bodies toward the attractor, $a_{
Externí odkaz:
http://arxiv.org/abs/2405.10982
Autor:
Ross, M. P., van Dongen, J., Huang, Y., Zhou, P., Chowdhury, Y., Apple, S. K., Mow-Lowry, C. M., Mitchell, A. L., Holland, N. A., Lantz, B., Bonilla, E., Engl, A., Pele, A., Griffith, D., Sanchez, E., Shaw, E. A., Gettings, C., Gundlach, J. H.
We describe an inertial rotation sensor with a 30-cm cylindrical proof-mass suspended from a pair of 14-${\mu}$m thick BeCu flexures. The angle between the proof-mass and support structure is measured with a pair of homodyne interferometers which ach
Externí odkaz:
http://arxiv.org/abs/2307.05710
Autor:
Ross, M. P., Gundlach, J. H., Adelberger, E. G., Weller, C. M., Shaw, E. A., Gettings, C., Kissel, J., Mistry, T., Datrier, L., Daw, E., Hendry, M.
The precisions of existing gravitational calibrators for gravitational wave observatories are limited by their dependence on the relative position between the calibrators and the observatory's test masses. Here we present a novel geometry consisting
Externí odkaz:
http://arxiv.org/abs/2301.10836
Autor:
Fleischer, S. M., Ross, M. P., Venkateswara, K., Hagedorn, C. A., Shaw, E. A., Swanson, E., Heckel, B. R., Gundlach, J. H.
Publikováno v:
Review of Scientific Instruments 93, 064505 (2022)
We describe a liquid-cryogen free cryostat with ultra-low vibration levels which allows for continuous operation of a torsion balance at cryogenic temperatures. The apparatus uses a commercially available two-stage pulse-tube cooler and passive vibra
Externí odkaz:
http://arxiv.org/abs/2206.02890
Autor:
Antypas, D., Banerjee, A., Bartram, C., Baryakhtar, M., Betz, J., Bollinger, J. J., Boutan, C., Bowring, D., Budker, D., Carney, D., Carosi, G., Chaudhuri, S., Cheong, S., Chou, A., Chowdhury, M. D., Co, R. T., López-Urrutia, J. R. Crespo, Demarteau, M., DePorzio, N., Derbin, A. V., Deshpande, T., Di Luzio, L., Diaz-Morcillo, A., Doyle, J. M., Drlica-Wagner, A., Droster, A., Du, N., Döbrich, B., Eby, J., Essig, R., Farren, G. S., Figueroa, N. L., Fry, J. T., Gardner, S., Geraci, A. A., Ghalsasi, A., Ghosh, S., Giannotti, M., Gimeno, B., Griffin, S. M., Grin, D., Grote, H., Gundlach, J. H., Guzzetti, M., Hanneke, D., Harnik, R., Henning, R., Irsic, V., Jackson, H., Kimball, D. F. Jackson, Jaeckel, J., Kagan, M., Kedar, D., Khatiwada, R., Knirck, S., Kolkowitz, S., Kovachy, T., Kuenstner, S. E., Lasner, Z., Leder, A. F., Lehnert, R., Leibrandt, D. R., Lentz, E., Lewis, S. M., Liu, Z., Manley, J., Maruyama, R. H., Millar, A. J., Muratova, V. N., Musoke, N., Nagaitsev, S., Noroozian, O., O'Hare, C. A. J., Ouellet, J. L., Pappas, K. M. W., Peik, E., Perez, G., Phipps, A., Rapidis, N. M., Robinson, J. M., Robles, V. H., Rogers, K. K., Rudolph, J., Rybka, G., Safdari, M., Safronova, M. S., Salemi, C. P., Schmidt, P. O., Schumm, T., Schwartzman, A., Shu, J., Simanovskaia, M., Singh, J., Singh, S., Smith, M. S., Snow, W. M., Stadnik, Y. V., Sun, C., Sushkov, A. O., Tait, T. M. P., Takhistov, V., Tanner, D. B., Temples, D. J., Thirolf, P. G., Thomas, J. H., Tobar, M. E., Tretiak, O., Tsai, Y. -D., Tyson, J. A., Vandegar, M., Vermeulen, S., Visinelli, L., Vitagliano, E., Wang, Z., Wilson, D. J., Winslow, L., Withington, S., Wooten, M., Yang, J., Ye, J., Young, B. A., Yu, F., Zaheer, M. H., Zelevinsky, T., Zhao, Y., Zhou, K.
The last decade has seen unprecedented effort in dark matter model building at all mass scales coupled with the design of numerous new detection strategies. Transformative advances in quantum technologies have led to a plethora of new high-precision
Externí odkaz:
http://arxiv.org/abs/2203.14915
We used a stationary torsion balance with a beryllium-aluminum composition dipole to search for ultra low-mass bosonic dark matter coupled to baryon minus lepton number. We set 95% confidence limits on the coupling constant $g_{\rm B-L}$ for bosons w
Externí odkaz:
http://arxiv.org/abs/2109.08822
Autor:
Ross, M. P., Venkateswara, K., Hagedorn, C. A., Leupold, C. J., Forsyth, P. W. F., Wegner, J. D., Shaw, E. A., Lee, J. G., Gundlach, J. H.
We describe a torsion pendulum with a large mass-quadrupole moment and a resonant frequency of 2.8 mHz, whose angle is measured using a modified Michelson interferometer. The system achieved noise levels of $\sim200\ \text{prad}/\sqrt{\text{Hz}}$ bet
Externí odkaz:
http://arxiv.org/abs/2101.01243
Autor:
Ross, M. P., Hagedorn, C. A., Shaw, E. A., Lockwood, A. L., Iritani, B. M., Lee, J. G., Venkateswara, K., Gundlach, J. H.
Publikováno v:
Phys. Rev. D 101, 102004 (2020)
With a reinterpretation of recent results, the GRACE Follow-On mission can be applied to gravitational wave astronomy. Existing GRACE Follow-On data constrain the stochastic gravitational wave background to $\Omega_{GW}<3.3\times10^{7}$ at 100 mHz. W
Externí odkaz:
http://arxiv.org/abs/2002.02044
Autor:
Ross, M. P., Venkateswara, K., Hagedorn, C. A., Gundlach, J. H., Kissel, J. S., Warner, J., Radkins, H., Shaffer, T. J., Coughlin, M. W., Bodin, P.
We describe measurements of the rotational component of teleseismic surface waves using an inertial high-precision ground-rotation-sensor installed at the LIGO Hanford Observatory (LHO). The sensor has a noise floor of 0.4 nrad$/ \sqrt{\rm Hz}$ at 50
Externí odkaz:
http://arxiv.org/abs/1707.03084