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1. μSR-Study of a 3% CoFe2O4 Nanoparticle Concentration Ferrofluid

Author

S. I. Vorob’ev, M. Balasoiu, D. Buzatu, V. N. Duginov, A. L. Getalov, K. I. Gritsaj, E. N. Komarov, S. A. Kotov, C. Stan, and G. V. Scherbakov

Subjects
muon, spin precession, magnetoelectric interactions, phase transitions, incommensurate magnetic structure, doped and nanostructured materials, Chemistry, QD1-999
Abstract

Magnetic fluids based on single-domain magnetic spinel ferrite nanoparticles dispersed in various liquid media are of particular practical and scientific interest. This paper presents a muon spectroscopy study of a ferrofluid based on magnetic nanoparticles of CoFe2O4 molecules dispersed in water (H2O) with a nanoparticle concentration of 3%. In this study, it was determined that the structure and magnitude of the magnetization of a ferrofluid depend on the viscosity of the liquid itself. It was shown that, at room temperature (290 K) and under an external magnetic field of 527 G, the observed additional magnetization was ~20 G. In a small fraction of the sample under study (~20%), negative magnetization (diamagnetism) was observed. At low temperatures (~30 K), the sample acted as a paramagnet in a magnetic field. For the first time, the magnetic field inside and in the immediate vicinity of a CoFe2O4 nanoparticle has been measured experimentally using the μSR method: the value was 1.96 ± 0.44 kG; thus, direct measurement of the magnetization of a nanoscale object was performed.

Published
2021
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3. μSR-Study of a 3% CoFe2O4 Nanoparticle Concentration Ferrofluid

Author

C. Stan, S. A. Kotov, A. L. Getalov, G. V. Scherbakov, M. Balasoiu, E. N. Komarov, K. I. Gritsaj, S. I. Vorob’ev, V. N. Duginov, and D. Buzatu

Subjects
Phase transition, Ferrofluid, Materials science, magnetoelectric interactions, incommensurate magnetic structure, Nanoparticle, 02 engineering and technology, 01 natural sciences, Paramagnetism, Magnetization, muon, 0103 physical sciences, Materials Chemistry, QD1-999, 010302 applied physics, doped and nanostructured materials, Condensed matter physics, spin precession, 021001 nanoscience & nanotechnology, Electronic, Optical and Magnetic Materials, Magnetic field, phase transitions, Chemistry, Chemistry (miscellaneous), Diamagnetism, Magnetic nanoparticles, 0210 nano-technology
Abstract

Magnetic fluids based on single-domain magnetic spinel ferrite nanoparticles dispersed in various liquid media are of particular practical and scientific interest. This paper presents a muon spectroscopy study of a ferrofluid based on magnetic nanoparticles of CoFe2O4 molecules dispersed in water (H2O) with a nanoparticle concentration of 3%. In this study, it was determined that the structure and magnitude of the magnetization of a ferrofluid depend on the viscosity of the liquid itself. It was shown that, at room temperature (290 K) and under an external magnetic field of 527 G, the observed additional magnetization was ~20 G. In a small fraction of the sample under study (~20%), negative magnetization (diamagnetism) was observed. At low temperatures (~30 K), the sample acted as a paramagnet in a magnetic field. For the first time, the magnetic field inside and in the immediate vicinity of a CoFe2O4 nanoparticle has been measured experimentally using the μSR method: the value was 1.96 ± 0.44 kG, thus, direct measurement of the magnetization of a nanoscale object was performed.

Published
2021

4. Measurement of the anomalous precession frequency of the muon in the Fermilab Muon <math><mi>g</mi><mo>−</mo><mn>2</mn></math> Experiment

Author

P. Bloom, P. Kammel, Timothy Chupp, C. Schlesier, P. Girotti, M. J. Lee, A. Nath, Frederick Gray, C. Gabbanini, D. Shemyakin, C. C. Polly, L. Cotrozzi, V. N. Duginov, G. Venanzoni, T. Stuttard, G. Lukicov, M. Iacovacci, H. E. Swanson, T. P. Gorringe, B. C.K. Casey, J. Grange, N. H. Tran, K. W. Hong, K. T. Pitts, R. T. Chislett, Fabrizio Marignetti, A. Lucà, Martin Fertl, E. Barlas-Yucel, J. George, A. Kuchibhotla, Dariush Hampai, T. Walton, D. Cauz, G. Sweetmore, J. Bono, I. R. Bailey, Dinko Pocanic, J. L. Holzbauer, Gavin Grant Hesketh, J. L. Ritchie, Alexander Keshavarzi, H. P. Binney, A. García, Manolis Kargiantoulakis, A. Basti, Barry King, B. MacCoy, M. Kiburg, David Rubin, Alexey Anisenkov, V. Tishchenko, Marin Karuza, H. Nguyen, P. Di Meo, Claudio Ferrari, N. Kinnaird, Liang Li, L. K. Gibbons, N. Raha, R. Chakraborty, D. Flay, R. N. Pilato, M. Incagli, M. Lancaster, Michael Syphers, S. Baeßler, T. J. V. Bowcock, J. LaBounty, G. M. Piacentino, D. Vasilkova, S. Park, A. Lusiani, T. Albahri, R. Madrak, Z. Hodge, Dominik Stöckinger, A. Chapelain, Brad Plaster, R. M. Carey, Dongdong Li, J. D. Crnkovic, D. W. Hertzog, Selcuk Haciomeroglu, J. P. Miller, Andrzej Wolski, Tabitha Halewood-leagas, Franco Bedeschi, B. L. Roberts, S. Grant, J. Fry, Kyoko Makino, J.B. Hempstead, S. Di Falco, K. S. Khaw, W. Turner, Z. Chu, A. T. Herrod, J. D. Price, T. Barrett, N. V. Khomutov, M. Farooq, P. Winter, J. Stapleton, R. Fatemi, D. Kawall, S. Charity, L. Santi, A. Schreckenberger, E. Valetov, B. Quinn, Yannis K. Semertzidis, B. Li, K. L. Giovanetti, A. E. Tewsley-Booth, S. Lee, Ran Hong, S. Leo, M. D. Galati, A.T. Fienberg, Sultan B. Dabagov, S. P. Chang, L. Kelton, G. Pauletta, Rachel Osofsky, G. Di Sciascio, S. Ganguly, D.A. Sweigart, Meghna Bhattacharya, Thomas Teubner, A. Gioiosa, S. Miozzi, B. Kiburg, J. Esquivel, A. Lorente Campos, David Kessler, E. Bottalico, M. Sorbara, Christopher Stoughton, J. Mott, Kayleigh Anne Thomson, Giovanni Cantatore, A. Fioretti, A. Anastasi, Wanwei Wu, Karie Badgley, S. Mastroianni, O. Kim, William Morse, L. Welty-Rieger, A. L. Lyon, A. Hibbert, A. Weisskopf, P. T. Debevec, W. Gohn, E. J. Ramberg, R. Di Stefano, E. Kraegeloh, Martin Berz, Z. Khechadoorian, S. Ramachandran, D. Stratakis, S. Corrodi, D. A. Tarazona, V. A. Baranov, J. Choi, F. Han, Nicholas A. Pohlman, M. Eads, I. Logashenko, N. A. Kuchinskiy, M. W. Smith, Y. I. Kim, A. Driutti, J. Kaspar, K. R. Labe, N. S. Froemming, E. Frlež, Albahri, T., Anastasi, A., Anisenkov, A., Badgley, K., Baeßler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Basti, A., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C. K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Debevec, P. T., Di Falco, S., Di Meo, P., Di Sciascio, G., Di Stefano, R., Driutti, A., Duginov, V. N., Eads, M., Esquivel, J., Farooq, M., Fatemi, R., Ferrari, C., Fertl, M., Fienberg, A. T., Fioretti, A., Flay, D., Frlež, E., Froemming, N. S., Fry, J., Gabbanini, C., Galati, M. D., Ganguly, S., Garcia, A., George, J., Gibbons, L. K., Gioiosa, A., Giovanetti, K. L., Girotti, P., Gohn, W., Gorringe, T., Grange, J., Grant, S., Gray, F., Haciomeroglu, S., Halewood-Leagas, T., Hampai, D., Han, F., Hempstead, J., Herrod, A. T., Hertzog, D. W., Hesketh, G., Hibbert, A., Hodge, Z., Holzbauer, J. L., Hong, K. W., Hong, R., Iacovacci, M., Incagli, M., Kammel, P., Kargiantoulakis, M., Karuza, M., Kaspar, J., Kawall, D., Kelton, L., Keshavarzi, A., Kessler, D., Khaw, K. S., Khechadoorian, Z., Khomutov, N. V., Kiburg, B., Kiburg, M., Kim, O., Kim, Y. I., King, B., Kinnaird, N., Kraegeloh, E., Kuchibhotla, A., Kuchinskiy, N. A., Labe, K. R., Labounty, J., Lancaster, M., Lee, M. J., Lee, S., Leo, S., Li, B., Li, D., Li, L., Logashenko, I., Lorente Campos, A., Lucà, A., Lukicov, G., Lusiani, A., Lyon, A. L., Maccoy, B., Madrak, R., Makino, K., Marignetti, F., Mastroianni, S., Miller, J. P., Miozzi, S., Morse, W. M., Mott, J., Nath, A., Nguyen, H., Osofsky, R., Park, S., Pauletta, G., Piacentino, G. M., Pilato, R. N., Pitts, K. T., Plaster, B., Počanić, D., Pohlman, N., Polly, C. C., Price, J., Quinn, B., Raha, N., Ramachandran, S., Ramberg, E., Ritchie, J. L., Roberts, B. L., Rubin, D. L., Santi, L., Schlesier, C., Schreckenberger, A., Semertzidis, Y. K., Shemyakin, D., Smith, M. W., Sorbara, M., Stöckinger, D., Stapleton, J., Stoughton, C., Stratakis, D., Stuttard, T., Swanson, H. E., Sweetmore, G., Sweigart, D. A., Syphers, M. J., Tarazona, D. A., Teubner, T., Tewsley-Booth, A. E., Thomson, K., Tishchenko, V., Tran, N. H., Turner, W., Valetov, E., Vasilkova, D., Venanzoni, G., Walton, T., Weisskopf, A., Welty-Rieger, L., Winter, P., Wolski, A., and Wu, W.

Subjects
Physics::Instrumentation and Detectors, Measure (physics), FOS: Physical sciences, 7. Clean energy, 01 natural sciences, Omega, High Energy Physics - Experiment, Nuclear physics, Nuclear Experiment, High Energy Physics - Experiment (hep-ex), muon, 0103 physical sciences, Fermilab, Nuclear Experiment (nucl-ex), 010306 general physics, Larmor precession, Physics, Muon, 010308 nuclear & particles physics, Settore FIS/01 - Fisica Sperimentale, anomalous magnetic moment, 3. Good health, Magnetic field, Physics::Accelerator Physics, High Energy Physics::Experiment, Storage ring, Fermi Gamma-ray Space Telescope
Abstract

The Muon g-2 Experiment at Fermi National Accelerator Laboratory (FNAL) has measured the muon anomalous precession frequency $\omega_a$ to an uncertainty of 434 parts per billion (ppb), statistical, and 56 ppb, systematic, with data collected in four storage ring configurations during its first physics run in 2018. When combined with a precision measurement of the magnetic field of the experiment's muon storage ring, the precession frequency measurement determines a muon magnetic anomaly of $a_{\mu}({\rm FNAL}) = 116\,592\,040(54) \times 10^{-11}$ (0.46 ppm). This article describes the multiple techniques employed in the reconstruction, analysis and fitting of the data to measure the precession frequency. It also presents the averaging of the results from the eleven separate determinations of \omega_a, and the systematic uncertainties on the result., Comment: 29 pages, 19 figures. Published in Physical Review D

Published
2021

5. Measurement of the anomalous precession frequency of the muon in the Fermilab Muon Experiment

Author

T. Albahri, A. Anastasi, A. Anisenkov, K. Badgley, S. Bae??ler, I. Bailey, V. ???A. Baranov, E. Barlas-Yucel, T. Barrett, A. Basti, F. Bedeschi, M. Berz, M. Bhattacharya, H. ???P. Binney, P. Bloom, J. Bono, E. Bottalico, T. Bowcock, G. Cantatore, R. ???M. Carey, B. ???C. ???K. Casey, D. Cauz, R. Chakraborty, S. ???P. Chang, A. Chapelain, S. Charity, R. Chislett, J. Choi, Z. Chu, T. ???E. Chupp, S. Corrodi, L. Cotrozzi, J. ???D. Crnkovic, S. Dabagov, P. ???T. Debevec, S. Di Falco, P. Di Meo, G. Di Sciascio, R. Di Stefano, A. Driutti, V. ???N. Duginov, M. Eads, J. Esquivel, M. Farooq, R. Fatemi, C. Ferrari, M. Fertl, A. ???T. Fienberg, A. Fioretti, D. Flay, E. Frle??, N. ???S. Froemming, J. Fry, C. Gabbanini, M. ???D. Galati, S. Ganguly, A. Garcia, J. George, L. ???K. Gibbons, A. Gioiosa, K. ???L. Giovanetti, P. Girotti, W. Gohn, T. Gorringe, J. Grange, S. Grant, F. Gray, S. Haciomeroglu, T. Halewood-Leagas, D. Hampai, F. Han, J. Hempstead, A. ???T. Herrod, D. ???W. Hertzog, G. Hesketh, A. Hibbert, Z. Hodge, J. ???L. Holzbauer, K. ???W. Hong, R. Hong, M. Iacovacci, M. Incagli, P. Kammel, M. Kargiantoulakis, M. Karuza, J. Kaspar, D. Kawall, L. Kelton, A. Keshavarzi, D. Kessler, K. ???S. Khaw, Z. Khechadoorian, N. ???V. Khomutov, B. Kiburg, M. Kiburg, O. Kim, Y. ???I. Kim, B. King, N. Kinnaird, E. Kraegeloh, A. Kuchibhotla, N. ???A. Kuchinskiy, K. ???R. Labe, J. LaBounty, M. Lancaster, M. ???J. Lee, S. Lee, S. Leo, B. Li, D. Li, L. Li, I. Logashenko, A. Lorente Campos, A. Luc??, G. Lukicov, A. Lusiani, A. ???L. Lyon, B. MacCoy, R. Madrak, K. Makino, F. Marignetti, S. Mastroianni, J. ???P. Miller, S. Miozzi, W. ???M. Morse, J. Mott, A. Nath, H. Nguyen, R. Osofsky, S. Park, G. Pauletta, G. ???M. Piacentino, R. ???N. Pilato, K. ???T. Pitts, B. Plaster, D. Po??ani??, N. Pohlman, C. ???C. Polly, J. Price, B. Quinn, N. Raha, S. Ramachandran, E. Ramberg, J. ???L. Ritchie, B. ???L. Roberts, D. ???L. Rubin, L. Santi, C. Schlesier, A. Schreckenberger, Y. ???K. Semertzidis, D. Shemyakin, M. ???W. Smith, M. Sorbara, D. St??ckinger, J. Stapleton, C. Stoughton, D. Stratakis, T. Stuttard, H. ???E. Swanson, G. Sweetmore, D. ???A. Sweigart, M. ???J. Syphers, D. ???A. Tarazona, T. Teubner, A. ???E. Tewsley-Booth, K. Thomson, V. Tishchenko, N. ???H. Tran, W. Turner, E. Valetov, D. Vasilkova, G. Venanzoni, T. Walton, A. Weisskopf, L. Welty-Rieger, P. Winter, A. Wolski, W. Wu, Albahri, T., Anastasi, A., Anisenkov, A., Badgley, K., Bae??ler, S., Bailey, I., Baranov, V. ???A., Barlas-Yucel, E., Barrett, T., Basti, A., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. ???P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. ???M., Casey, B. ???C. ???K., Cauz, D., Chakraborty, R., Chang, S. ???P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. ???E., Corrodi, S., Cotrozzi, L., Crnkovic, J. ???D., Dabagov, S., Debevec, P. ???T., Di Falco, S., Di Meo, P., Di Sciascio, G., Di Stefano, R., Driutti, A., Duginov, V. ???N., Eads, M., Esquivel, J., Farooq, M., Fatemi, R., Ferrari, C., Fertl, M., Fienberg, A. ???T., Fioretti, A., Flay, D., Frle??, E., Froemming, N. ???S., Fry, J., Gabbanini, C., Galati, M. ???D., Ganguly, S., Garcia, A., George, J., Gibbons, L. ???K., Gioiosa, A., Giovanetti, K. ???L., Girotti, P., Gohn, W., Gorringe, T., Grange, J., Grant, S., Gray, F., Haciomeroglu, S., Halewood-Leagas, T., Hampai, D., Han, F., Hempstead, J., Herrod, A. ???T., Hertzog, D. ???W., Hesketh, G., Hibbert, A., Hodge, Z., Holzbauer, J. ???L., Hong, K. ???W., Hong, R., Iacovacci, M., Incagli, M., Kammel, P., Kargiantoulakis, M., Karuza, M., Kaspar, J., Kawall, D., Kelton, L., Keshavarzi, A., Kessler, D., Khaw, K. ???S., Khechadoorian, Z., Khomutov, N. ???V., Kiburg, B., Kiburg, M., Kim, O., Kim, Y. ???I., King, B., Kinnaird, N., Kraegeloh, E., Kuchibhotla, A., Kuchinskiy, N. ???A., Labe, K. ???R., Labounty, J., Lancaster, M., Lee, M. ???J., Lee, S., Leo, S., Li, B., Li, D., Li, L., Logashenko, I., Lorente Campos, A., Luc??, A., Lukicov, G., Lusiani, A., Lyon, A. ???L., Maccoy, B., Madrak, R., Makino, K., Marignetti, F., Mastroianni, S., Miller, J. ???P., Miozzi, S., Morse, W. ???M., Mott, J., Nath, A., Nguyen, H., Osofsky, R., Park, S., Pauletta, G., Piacentino, G. ???M., Pilato, R. ???N., Pitts, K. ???T., Plaster, B., Po??ani??, D., Pohlman, N., Polly, C. ???C., Price, J., Quinn, B., Raha, N., Ramachandran, S., Ramberg, E., Ritchie, J. ???L., Roberts, B. ???L., Rubin, D. ???L., Santi, L., Schlesier, C., Schreckenberger, A., Semertzidis, Y. ???K., Shemyakin, D., Smith, M. ???W., Sorbara, M., St??ckinger, D., Stapleton, J., Stoughton, C., Stratakis, D., Stuttard, T., Swanson, H. ???E., Sweetmore, G., Sweigart, D. ???A., Syphers, M. ???J., Tarazona, D. ???A., Teubner, T., Tewsley-Booth, A. ???E., Thomson, K., Tishchenko, V., Tran, N. ???H., Turner, W., Valetov, E., Vasilkova, D., Venanzoni, G., Walton, T., Weisskopf, A., Welty-Rieger, L., Winter, P., Wolski, A., and Wu, W.

Abstract

The Muon g−2 Experiment at Fermi National Accelerator Laboratory (FNAL) has measured the muon anomalous precession frequency ωma to an uncertainty of 434 parts per billion (ppb), statistical, and 56 ppb, systematic, with data collected in four storage ring configurations during its first physics run in 2018. When combined with a precision measurement of the magnetic field of the experiment’s muon storage ring, the precession frequency measurement determines a muon magnetic anomaly of aμ(FNAL)=116592040(54)×10−11 (0.46 ppm). This article describes the multiple techniques employed in the reconstruction, analysis, and fitting of the data to measure the precession frequency. It also presents the averaging of the results from the 11 separate determinations of ωma, and the systematic uncertainties on the result.

Published
2021

6. Magnetic Field Measurement and Analysis for the Muon g-2 Experiment at Fermilab

Author

Z. Chu, M. Eads, M. Lancaster, T. Halewood-Leagas, D. Flay, I. Logashenko, N. A. Kuchinskiy, M. W. Smith, Y. I. Kim, S.B. Dabagov, B. MacCoy, N. H. Tran, K. W. Hong, Liang Li, L. Santi, A. Chapelain, K. S. Khaw, K. T. Pitts, R. Fatemi, I. R. Bailey, E. Bottalico, Andrzej Wolski, R. N. Pilato, P. Bloom, M. Iacovacci, G. Pauletta, M. Incagli, R. Di Stefano, Timothy Chupp, E. Barlas-Yucel, G. Di Sciascio, G. Sweetmore, D. Cauz, P. Girotti, H. Nguyen, Thomas Teubner, D.A. Sweigart, A. E. Tewsley-Booth, G. Piacentino, D. Stöckinger, Karie Badgley, L. Kelton, P. Winter, Brad Plaster, J. L. Holzbauer, R. Chislett, B. Quinn, R. M. Carey, A. Conway, Kyoko Makino, A. Hibbert, B. C. K. Casey, A. Driutti, J. George, A. Lorente Campos, W. Turner, A. Lucà, S. Ramachandran, W. Wu, G. Hesketh, E. Valetov, E. Kraegeloh, Franco Bedeschi, A. Gioiosa, P. T. Debevec, L. Cotrozzi, V. N. Duginov, S. Corrodi, S. Miozzi, Yannis K. Semertzidis, M. J. Lee, S. Mastroianni, P. Di Meo, Martin Berz, K. L. Giovanetti, D. Stratakis, G. Lukicov, C. Gabbanini, J.B. Hempstead, A. Weisskopf, V. Tishchenko, B. Kiburg, H. E. Swanson, O. Kim, Michael Syphers, R. Osofsky, T. Stuttard, J. Esquivel, Dariush Hampai, T. J. V. Bowcock, Adam L. Lyon, Z. Khechadoorian, Meghna Bhattacharya, T. Barrett, Martin Fertl, D. Shemyakin, V. A. Baranov, Manolis Kargiantoulakis, R. Madrak, Marin Karuza, D. Vasilkova, S. Park, N. Kinnaird, A. Lusiani, T. Albahri, E. Ramberg, Nicholas A. Pohlman, D. Kawall, A. Schreckenberger, J. L. Ritchie, A. T. Herrod, Selcuk Haciomeroglu, L. K. Gibbons, J. Stapleton, Fabrizio Marignetti, K. Thomson, J. LaBounty, W. Gohn, G. Venanzoni, B. Li, Claudio Ferrari, Dinko Pocanic, S. P. Chang, S. Charity, T. Walton, T. P. Gorringe, Benjamin T. King, A. Fioretti, A. Anastasi, Sudeshna Ganguly, S. Lee, Ran Hong, M. D. Galati, A.T. Fienberg, William Morse, L. Welty-Rieger, Alejandro Garcia, J. Grange, J. Choi, Dongdong Li, D. W. Hertzog, A. Keshavarzi, M. Sorbara, F. Han, J. Bono, J. Mott, P. Kammel, C. Schlesier, Giovanni Cantatore, S. Di Falco, R. Chakraborty, C. C. Polly, J. P. Miller, M. Kiburg, J. Kaspar, David Rubin, S. Baeßler, K. R. Labe, N. S. Froemming, H. P. Binney, B. L. Roberts, S. Grant, J. Price, N. Raha, Z. Hodge, N. V. Khomutov, M. Farooq, Jason Crnkovic, D. A. Tarazona, C. Stoughton, A. Nath, Frederick Gray, David Kessler, Albahri, T., Anastasi, A., Badgley, K., Baessler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C. K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Conway, A., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Debevec, P. T., Di Falco, S., Di Meo, P., Di Sciascio, G., Di Stefano, R., Driutti, A., Duginov, V. N., Eads, M., Esquivel, J., Farooq, M., Fatemi, R., Ferrari, C., Fertl, M., Fienberg, A. T., Fioretti, A., Flay, D., Froemming, N. S., Gabbanini, C., Galati, M. D., Ganguly, S., Garcia, A., George, J., Gibbons, L. K., Gioiosa, A., Giovanetti, K. L., Girotti, P., Gohn, W., Gorringe, T., Grange, J., Grant, S., Gray, F., Haciomeroglu, S., Halewood-Leagas, T., Hampai, D., Han, F., Hempstead, J., Herrod, A. T., Hertzog, D. W., Hesketh, G., Hibbert, A., Hodge, Z., Holzbauer, J. L., Hong, K. W., Hong, R., Iacovacci, M., Incagli, M., Kammel, P., Kargiantoulakis, M., Karuza, M., Kaspar, J., Kawall, D., Kelton, L., Keshavarzi, A., Kessler, D., Khaw, K. S., Khechadoorian, Z., Khomutov, N. V., Kiburg, B., Kiburg, M., Kim, O., Kim, Y. I., King, B., Kinnaird, N., Kraegeloh, E., Kuchinskiy, N. A., Labe, K. R., Labounty, J., Lancaster, M., Lee, M. J., Lee, S., Li, B., Li, D., Li, L., Logashenko, I., Lorente Campos, A., Luca, A., Lukicov, G., Lusiani, A., Lyon, A. L., Maccoy, B., Madrak, R., Makino, K., Marignetti, F., Mastroianni, S., Miller, J. P., Miozzi, S., Morse, W. M., Mott, J., Nath, A., Nguyen, H., Osofsky, R., Park, S., Pauletta, G., Piacentino, G. M., Pilato, R. N., Pitts, K. T., Plaster, B., Pocanic, D., Pohlman, N., Polly, C. C., Price, J., Quinn, B., Raha, N., Ramachandran, S., Ramberg, E., Ritchie, J. L., Roberts, B. L., Rubin, D. L., Santi, L., Schlesier, C., Schreckenberger, A., Semertzidis, Y. K., Shemyakin, D., Smith, M. W., Sorbara, M., Stockinger, D., Stapleton, J., Stoughton, C., Stratakis, D., Stuttard, T., Swanson, H. E., Sweetmore, G., Sweigart, D. A., Syphers, M. J., Tarazona, D. A., Teubner, T., Tewsley-Booth, A. E., Thomson, K., Tishchenko, V., Tran, N. H., Turner, W., Valetov, E., Vasilkova, D., Venanzoni, G., Walton, T., Weisskopf, A., Welty-Rieger, L., Winter, P., Wolski, A., Wu, W., Baeßler, S., Lucà, A., Počanić, D., and Stöckinger, D.

Subjects
Field (physics), Physics::Instrumentation and Detectors, FOS: Physical sciences, 7. Clean energy, 01 natural sciences, Omega, High Energy Physics - Experiment, 010305 fluids & plasmas, Nuclear physics, High Energy Physics - Experiment (hep-ex), muon, 0103 physical sciences, Proton spin crisis, Fermilab, Nuclear Experiment (nucl-ex), 010306 general physics, Nuclear Experiment, Larmor precession, Physics, Muon, Settore FIS/01 - Fisica Sperimentale, VACUUM POLARIZATION CONTRIBUTIONSTEMPERATURE-DEPENDENCEPROTON NMRMOMENTSUSCEPTIBILITYTERMS, anomalous magnetic moment, Muon g-2 Experiment, anomalous precession frequency, Magnetic field, anomalous precession frequency, Muon g-2 Experiment, Fermi Gamma-ray Space Telescope
Abstract

The Fermi National Accelerator Laboratory has measured the anomalous precession frequency $a^{}_\mu = (g^{}_\mu-2)/2$ of the muon to a combined precision of 0.46 parts per million with data collected during its first physics run in 2018. This paper documents the measurement of the magnetic field in the muon storage ring. The magnetic field is monitored by nuclear magnetic resonance systems and calibrated in terms of the equivalent proton spin precession frequency in a spherical water sample at 34.7$^\circ$C. The measured field is weighted by the muon distribution resulting in $\tilde{\omega}'^{}_p$, the denominator in the ratio $\omega^{}_a$/$\tilde{\omega}'^{}_p$ that together with known fundamental constants yields $a^{}_\mu$. The reported uncertainty on $\tilde{\omega}'^{}_p$ for the Run-1 data set is 114 ppb consisting of uncertainty contributions from frequency extraction, calibration, mapping, tracking, and averaging of 56 ppb, and contributions from fast transient fields of 99 ppb., Comment: Added one citation and corrected missing normalization in Eqs (35) and (36)

Published
2021
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7. Beam dynamics corrections to the Run-1 measurement of the muon anomalous magnetic moment at Fermilab

Author

K. S. Khaw, C. Schlesier, Diktys Stratakis, R. Fatemi, S. Corrodi, D. Newton, K. T. Pitts, R. T. Chislett, L. K. Gibbons, Kyoko Makino, E. Bottalico, A. Gioiosa, J. LaBounty, J. Bono, I. R. Bailey, P. Kammel, D. Kawall, T. J. V. Bowcock, H. P. Binney, W. Turner, A. T. Herrod, S. Miozzi, A. Schreckenberger, E. Valetov, N. H. Tran, K. W. Hong, J. Esquivel, M. Sorbara, Christopher Stoughton, Fabrizio Marignetti, A. Lucà, L. Kelton, M. Eads, D. Stöckinger, T. Barrett, G. Piacentino, J. Mott, S. Baeßler, Bck Casey, Kayleigh Anne Thomson, Giovanni Cantatore, Rachel Osofsky, M. Kiburg, E. Barlas-Yucel, Michael Syphers, C. C. Polly, J. Choi, R. Chakraborty, D. Flay, David Rubin, J. Grange, N. A. Kuchinskiy, M. W. Smith, G. Lukicov, M. Iacovacci, G. Pauletta, J. L. Ritchie, B. MacCoy, L. Cotrozzi, V. N. Duginov, A. Lorente Campos, S. Lee, Ran Hong, G. Sweetmore, D.A. Sweigart, M. Korostelev, Dongdong Li, D. W. Hertzog, Alexander Keshavarzi, G. Di Sciascio, Alejandro L. Garcia, Liang Li, F. Han, D. Sathyan, A.T. Fienberg, Sultan B. Dabagov, M. J. Lee, S. P. Chang, Benjamin T. King, Marin Karuza, R. N. Pilato, M. Incagli, J.B. Hempstead, B. Quinn, L. Santi, N. Kinnaird, F. Gray, P. Winter, L. Welty-Rieger, Meghna Bhattacharya, H. Nguyen, P. Di Meo, T. Stuttard, A. L. Lyon, David Kessler, A. Chapelain, J. Kaspar, B. Li, Galati, Sudeshna Ganguly, Andrzej Wolski, A. Driutti, D. A. Tarazona, Brad Plaster, R. M. Carey, D. Cauz, G. Venanzoni, J. Fry, B. Kiburg, J. P. Miller, W. Gohn, B. L. Roberts, S. Grant, V. A. Baranov, Nicholas A. Pohlman, N. V. Khomutov, M. Farooq, Jason Crnkovic, A. Hibbert, K. R. Labe, P. T. Debevec, Thomas Teubner, S. Di Falco, J. D. Price, Yi Kim, I.B. Logashenko, Yannis K. Semertzidis, K. L. Giovanetti, A. E. Tewsley-Booth, E. Frlež, Martin Berz, S. Charity, T. Walton, Z. Khechadoorian, S. Ramachandran, A. Fiedler, T. P. Gorringe, William Morse, A. Fioretti, A. Anastasi, O. Kim, A. Weisskopf, Wanwei Wu, Karie Badgley, S. Mastroianni, J. L. Holzbauer, Manolis Kargiantoulakis, S. Park, A. Lusiani, T. Albahri, R. Madrak, Selcuk Haciomeroglu, Z. Chu, Dariush Hampai, Gavin Grant Hesketh, J. George, Tishchenko, D. Vasilkova, Franco Bedeschi, P. Bloom, Timothy Chupp, P. Girotti, Nathan Froemming, J. Stapleton, Dinko Pocanic, M. Lancaster, C. Gabbanini, N. Raha, H. E. Swanson, Martin Fertl, Z. Hodge, Tabitha Halewood-leagas, E. J. Ramberg, A. Nath, R. Di Stefano, E. Kraegeloh, Claudio Ferrari, Albahri, T., Anastasi, A., Badgley, K., Baessler, S., Bailey, I., Baranov, V. A., Barlas-Yucel, E., Barrett, T., Bedeschi, F., Berz, M., Bhattacharya, M., Binney, H. P., Bloom, P., Bono, J., Bottalico, E., Bowcock, T., Cantatore, G., Carey, R. M., Casey, B. C. K., Cauz, D., Chakraborty, R., Chang, S. P., Chapelain, A., Charity, S., Chislett, R., Choi, J., Chu, Z., Chupp, T. E., Corrodi, S., Cotrozzi, L., Crnkovic, J. D., Dabagov, S., Debevec, P. T., Di Falco, S., Di Meo, P., Di Sciascio, G., Di Stefano, R., Driutti, A., Duginov, V. N., Eads, M., Esquivel, J., Farooq, M., Fatemi, R., Ferrari, C., Fertl, M., Fiedler, A., Fienberg, A. T., Fioretti, A., Flay, D., Frlez, E., Froemming, N. S., Fry, J., Gabbanini, C., Galati, M. D., Ganguly, S., Garcia, A., George, J., Gibbons, L. K., Gioiosa, A., Giovanetti, K. L., Girotti, P., Gohn, W., Gorringe, T., Grange, J., Grant, S., Gray, F., Haciomeroglu, S., Halewood-Leagas, T., Hampai, D., Han, F., Hempstead, J., Herrod, A. T., Hertzog, D. W., Hesketh, G., Hibbert, A., Hodge, Z., Holzbauer, J. L., Hong, K. W., Hong, R., Iacovacci, M., Incagli, M., Kammel, P., Kargiantoulakis, M., Karuza, M., Kaspar, J., Kawall, D., Kelton, L., Keshavarzi, A., Kessler, D., Khaw, K. S., Khechadoorian, Z., Khomutov, N. V., Kiburg, B., Kiburg, M., Kim, O., Kim, Y. I., King, B., Kinnaird, N., Korostelev, M., Kraegeloh, E., Kuchinskiy, N. A., Labe, K. R., Labounty, J., Lancaster, M., Lee, M. J., Lee, S., Li, B., Li, D., Li, L., Logashenko, I., Lorente Campos, A., Luca, A., Lukicov, G., Lusiani, A., Lyon, A. L., Maccoy, B., Madrak, R., Makino, K., Marignetti, F., Mastroianni, S., Miller, J. P., Miozzi, S., Morse, W. M., Mott, J., Nath, A., Newton, D., Nguyen, H., Osofsky, R., Park, S., Pauletta, G., Piacentino, G. M., Pilato, R. N., Pitts, K. T., Plaster, B., Pocanic, D., Pohlman, N., Polly, C. C., Price, J., Quinn, B., Raha, N., Ramachandran, S., Ramberg, E., Ritchie, J. L., Roberts, B. L., Rubin, D. L., Santi, L., Sathyan, D., Schlesier, C., Schreckenberger, A., Semertzidis, Y. K., Smith, M. W., Sorbara, M., Stockinger, D., Stapleton, J., Stoughton, C., Stratakis, D., Stuttard, T., Swanson, H. E., Sweetmore, G., Sweigart, D. A., Syphers, M. J., Tarazona, D. A., Teubner, T., Tewsley-Booth, A. E., Thomson, K., Tishchenko, V., Tran, N. H., Turner, W., Valetov, E., Vasilkova, D., Venanzoni, G., Walton, T., Weisskopf, A., Welty-Rieger, L., Winter, P., Wolski, A., and Wu, W.

Subjects
Larmor precession, Physics, Accelerator Physics (physics.acc-ph), Nuclear and High Energy Physics, Muon, Physics and Astronomy (miscellaneous), Anomalous magnetic dipole moment, 010308 nuclear & particles physics, FOS: Physical sciences, Surfaces and Interfaces, 01 natural sciences, High Energy Physics - Experiment, Magnetic field, Nuclear physics, High Energy Physics - Experiment (hep-ex), muon magnetic anomaly, 0103 physical sciences, Physics - Accelerator Physics, Fermilab, Pitch angle, 010306 general physics, G-2 EXPERIMENTFREQUENCY, Storage ring, Beam (structure)
Abstract

This paper presents the beam dynamics systematic corrections and their uncertainties for the Run-1 data set of the Fermilab Muon g-2 Experiment. Two corrections to the measured muon precession frequency $\omega_a^m$ are associated with well-known effects owing to the use of electrostatic quadrupole (ESQ) vertical focusing in the storage ring. An average vertically oriented motional magnetic field is felt by relativistic muons passing transversely through the radial electric field components created by the ESQ system. The correction depends on the stored momentum distribution and the tunes of the ring, which has relatively weak vertical focusing. Vertical betatron motions imply that the muons do not orbit the ring in a plane exactly orthogonal to the vertical magnetic field direction. A correction is necessary to account for an average pitch angle associated with their trajectories. A third small correction is necessary because muons that escape the ring during the storage time are slightly biased in initial spin phase compared to the parent distribution. Finally, because two high-voltage resistors in the ESQ network had longer than designed RC time constants, the vertical and horizontal centroids and envelopes of the stored muon beam drifted slightly, but coherently, during each storage ring fill. This led to the discovery of an important phase-acceptance relationship that requires a correction. The sum of the corrections to $\omega_a^m$ is 0.50 $\pm$ 0.09 ppm; the uncertainty is small compared to the 0.43 ppm statistical precision of $\omega_a^m$., Comment: 35 pages, 29 figures. Accepted by Phys. Rev. Accel. Beams

Published
2021
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8. 2-D straw detectors with high rate capability

Author

A. S. Lobko, N. A. Kuchinskiy, V. S. Smirnov, O. V. Misevich, V. Baranov, F. E. Zyazyulya, N. V. Khomutov, V. N. Duginov, A. I. Rudenko, N. P. Kravchuk, A. S. Korenchenko, V. A. Chekhovsky, S. A. Movchan, and A. O. Kolesnikov

Subjects
Nuclear and High Energy Physics, Physics - Instrumentation and Detectors, Physics::Instrumentation and Detectors, FOS: Physical sciences, 01 natural sciences, High Energy Physics - Experiment, law.invention, High Energy Physics - Experiment (hep-ex), Physics::Popular Physics, Optics, Physics::Plasma Physics, law, 0103 physical sciences, Radiology, Nuclear Medicine and imaging, 010306 general physics, High rate, Physics, Measurement method, Radiation, 010308 nuclear & particles physics, business.industry, Detector, Instrumentation and Detectors (physics.ins-det), Straw, Radial coordinate, Atomic and Molecular Physics, and Optics, Cathode, Anode, High Energy Physics::Experiment, business
Abstract

Precise measurement of straw axial coordinate (along the anode wire) with accuracy compatible with straw radial coordinate determination by drift time measurement and increase of straw detector rate capability by using straw cathode readout instead of anode readout are presented., Comment: 16 pages, 10 figures

Published
2017

9. The use of a segmented cathode of a drift tube for designing a track detector with a high rate capability

Author

A. I. Rudenko, A. O. Kolesnikov, V. A. Baranov, V. A. Chekhovsky, V. N. Duginov, N. A. Kuchinskiy, N. P. Kravchuk, F. E. Zyazyulya, N. V. Khomutov, A. S. Korenchenko, S. A. Movchan, and V. S. Smirnov

Subjects
Materials science, Luminosity (scattering theory), Physics::Instrumentation and Detectors, business.industry, Track (disk drive), Detector, Cathode, law.invention, Anode, Optics, law, High Energy Physics::Experiment, Granularity, business, Instrumentation, Beam (structure), Communication channel
Abstract

Detector rate capability is one of the main parameters for designing a new detector for high energy physics due to the permanent rise of the beam luminosity of modern accelerators. One of the widely used detectors for particle track reconstruction is a straw-detector based on drift tubes. The rate capability of such detectors is limited by the parameters of readout electronics. The traditional method of increasing detector rate capability consists in increasing their granularity (the number of “elementary” detectors = readout channels) by reducing the straw diameter and/or by dividing the straw anode wire into two parts (for decreasing the rate per readout channel). A new method of designing straw detectors with a high rate capability is presented and tested. The method is based on dividing the straw cathode into parts and the independent readout of each part.

Published
2014

10. Experimental study of nuclear fusion reactions in a ptμ system

Author

K. I. Gritsaj, A. I. Rudenko, Yu. I. Vinogradov, V. P. Volnykh, V. N. Duginov, A. D. Konin, L. N. Bogdanova, V. V. Filchenkov, A. A. Yukhimchuk, T. N. Mamedov, V. A. Stolupin, and D. L. Demin

Subjects
Nuclear physics, Nuclear reaction, Physics, Nuclear and High Energy Physics, Partial product, Radiation, Muon, Nuclear fusion, Radiology, Nuclear Medicine and imaging, Measure (mathematics), Atomic and Molecular Physics, and Optics, Catalysis
Abstract

By means of muon catalysis we study the phenomena in a pt-fusion, which have been previously investigated in the only experiment and now are at the frontier of nuclear few-body physics. The experiment is aimed at measuring the yields of the reaction products: γ-quanta, conversion muons and e + e − pairs. As a result we plan to measure the pt-fusion partial product yields (first time for e + e − pairs) with accuracy not worse than 10%, and this will enable us to obtain the nuclear reaction rates in M1 and E0 transitions in A = 4 system.

Published
2012

11. μSR study of the properties of Fe3O4-based nanostructured magnetic systems

Author

K. I. Gritsaj, L. Vekas, G. V. Shcherbakov, V. A. Zhukov, E. N. Komarov, C. Petrescu, Maria Balasoiu, S. I. Vorob’ev, S. G. Barsov, S. A. Kotov, T. N. Mamedov, V. P. Koptev, D. Bica, and V. N. Duginov

Subjects
Larmor precession, Ferrofluid, Magnetization, Paramagnetism, Materials science, Muon, Physics and Astronomy (miscellaneous), Condensed matter physics, Diamagnetism, Brillouin and Langevin functions, Physics::Chemical Physics, Magnetic field
Abstract

A ferrofluid based on Fe3O4 nanoparticles dispersed in heavy water D2O is studied using the μSR method. The experiment has been carried out at temperatures 26–300 K. It is found that the diamagnetic (muon) fraction is formed in the ferrofluid in about the same amount as in D2O, but the muon-spin relaxation rate in the ferrofluid is much higher than in D2O. A significant shift of the muon-spin precession frequency in the ferrofluid is observed. It is shown that the shift of the muon precession frequency as a function of the external magnetic field is described by the Langevin function typical of paramagnetic magnetization. The mean magnetic field in the medium due to magnetic-nanoparticle polarization in an external field is experimentally determined. The nanoparticle sizes are estimated.

Published
2008

12. The Measurement of the Anomalous Magnetic Moment of the Muon at Fermilab

Author

R. Chislett, J. Carroll, D. Cauz, Andrew Smith, M. Lee, A. Anastasi, E. Hazen, M. Eads, G. Pauletta, R. Osofsky, B. Quinn, R. Fatemi, I. Logashenko, S. Baessler, D.A. Sweigart, N. A. Kuchinskiy, M. W. Smith, D. Still, Yannis K. Semertzidis, W. Gohn, K. L. Giovanetti, V. Tishchenko, L. Welty-Rieger, R. Di Stefano, C. Fu, M. Iacovacci, E. Barzi, V. Volnykh, J. F. Ostiguy, D. W. Hertzog, T. Stuttard, V. A. Baranov, C. J. G. Onderwater, Michael Syphers, G. Luo, V. P. Druzhinin, E. Won, P. T. Debevec, C. Yoshikawa, J. Grange, Martin Fertl, Stephen Maxfield, F. Azfar, A. Epps, L Li, P. Winter, C. Johnstone, A. Fioretti, B. Drendel, K. T. Pitts, M R M Warren, L. K. Gibbons, D. Stöckinger, M. Whitley, Donald B. Rubin, M. Rominsky, J. Crnkovic, T. P. Gorringe, T. Walton, C. Ferrari, Z. Meadows, G. Venanzoni, Thomas Teubner, Nicholas A. Pohlman, S. Haciomeroglu, M. Gaisser, M. Wormald, B. Casey, Frederick Gray, H. Freidsam, Marin Karuza, K. R. Lynch, P. Kammel, S. Henry, S.B. Dabagov, A. L. Lyon, C. Schlesier, E. Motuk, Yuri F. Orlov, D. Allspach, N. Rider, T. J. V. Bowcock, B. Abi, N. Kinnaird, D. Babusci, A. Para, R. M. Carey, A. de Gouvea, J. Johnstone, J. P. Miller, S. Lee, A.T. Fienberg, G. Di Sciascio, Y. Kim, H. Schellman, L.P. Alonzi, H Yang, H. Kamal Sayed, B. L. Roberts, Edward J. Swanson, V. N. Duginov, E. Ramberg, E. Frlez, N. S. Froemming, I. Kourbanis, J. Mott, L. Santi, D. Kawall, Giovanni Cantatore, N. V. Khomutov, G. Corradi, D. Flay, C. C. Polly, Nicholas Eggert, S. Marignetti, R. Bjorkquist, S. Kim, Benjamin T. King, D. Moricciani, C. Gabbanini, A. Tewlsey-Booth, V. Krylov, Yu. M. Shatunov, Andre Frankenthal, S. Leo, M. E. Convery, S. Mastroianni, A. Chapelain, A. Palladino, Andrzej Wolski, H. Nguyen, B. Kiburg, Alexander Mikhailichenko, K. W. Merritt, J. Kaspar, Dinko Pocanic, M. Popovic, M. Lancaster, W. M. Morse, Timothy Chupp, M. McEvoy, Dariush Hampai, X. Ji, M. Shenk, S. Al-Kilani, A. K. Soha, D. A. Tarazona, Klaus-Peter Jungmann, Alejandro Garcia, Logashenko, I., Grange, J., Winter, P., Carey, R. M., Hazen, E., Kinnaird, N., Miller, J. P., Mott, J., Roberts, B. L., Crnkovic, J., Morse, W. M., Sayed, H. Kamal, Tishchenko, V., Druzhinin, V. P., Shatunov, Y. M., Bjorkquist, R., Chapelain, A., Eggert, N., Frankenthal, A., Gibbons, L., Kim, S., Mikhailichenko, A., Orlov, Y., Rider, N., Rubin, D., Sweigart, D., Allspach, D., Barzi, E., Casey, B., Convery, M. E., Drendel, B., Freidsam, H., Johnstone, C., Johnstone, J., Kiburg, B., Kourbanis, I., Lyon, A. L., Merritt, K. W., Morgan, J. P., Nguyen, H., Ostiguy, J. F., Para, A., Polly, C. C., Popovic, M., Ramberg, E., Rominsky, M., Soha, A. K., Still, D., Walton, T., Yoshikawa, C., Jungmann, K., Onderwater, C. J. G., Debevec, P., Leo, S., Pitts, K., Schlesier, C., Anastasi, A., Babusci, D., Corradi, G., Hampai, D., Palladino, A., Venanzoni, G., Dabagov, S., Ferrari, C., Fioretti, A., Gabbanini, C., Di Stefano, R., Marignetti, S., Iacovacci, M., Mastroianni, S., Di Sciascio, G., Moricciani, D., Cantatore, Giovanni, Karuza, M., Giovanetti, K., Baranov, V., Duginov, V., Khomutov, N., Krylov, V., Kuchinskiy, N., Volnykh, V., Gaisser, M., Haciomeroglu, S., Kim, Y., Lee, S., Lee, M., Semertzidis, Y. K., Won, E., Fatemi, R., Gohn, W., Gorringe, T., Bowcock, T., Carroll, J., King, B., Maxfield, S., Smith, A., Teubner, T., Whitley, M., Wormald, M., Wolski, A., Al Kilani, S., Chislett, R., Lancaster, M., Motuk, E., Stuttard, T., Warren, M., Flay, D., Kawall, D., Meadows, Z., Syphers, M., Tarazona, D., Chupp, T., Tewlsey Booth, A., Quinn, B., Eads, M., Epps, A., Luo, G., Mcevoy, M., Pohlman, N., Shenk, M., de Gouvea, A., Welty Rieger, L., Schellman, H., Abi, B., Azfar, F., Henry, S., Gray, F., Fu, C., Ji, X., Li, L., Yang, H., Stockinger, D., Cauz, D., Pauletta, G., Santi, L., Baessler, S., Frlez, E., Pocanic, D., Alonzi, L. P., Fertl, M., Fienberg, A., Froemming, N., Garcia, A., Hertzog, D. W., Kammel, P., Kaspar, J., Osofsky, R., Smith, M., Swanson, E., Lynch, K., Precision Frontier, Ostiguy, J. -F., Cantatore, G., Al-Kilani, S., Tewlsey-Booth, A., Welty-Rieger, L., and Abys, Salvatore

Subjects
Particle physics, magnetic moment, standard model, General Physics and Astronomy, Standard deviation, Standard Model, Muon magnetic moment, Nuclear physics, Physics and Astronomy (all), anomalous magnetic moment, Positron, muon anomaly, muon, Fermilab, Physical and Theoretical Chemistry, instrumentation, Physics, Muon, Anomalous magnetic moment, Standard model, Chemistry (all), Anomalous magnetic dipole moment, Magnetic moment, General Chemistry, Magnetic field, High Energy Physics::Experiment, measurement, muon, magnetic moment, instrumentation, measurement
Abstract

The anomalous magnetic moment of the muon is one of the most precisely measured quantities in experimental particle physics. Its latest measurement at Brookhaven National Laboratory deviates from the Standard Model expectation by approximately 3.5 standard deviations. The goal of the new experiment, E989, now under construction at Fermilab, is a fourfold improvement in precision. Here, we discuss the details of the future measurement and its current status. C 2015 AIP Publishing LLC. [http://dx.doi.org/10.1063/1.4917553]

Published
2015

13. The New Muon g-2 experiment at Fermilab

Author

B. Abi T. Albahri, S. Al-Kilani, D. Allspach, L. P. Alonzi, A. Anastasi, F. Azfar, D. Babusci, S. Baessler, V. A. Baranov, E. Barzi, R. Bjorkquist, T. Bowcock, G. Cantatore, R. M. Carey, J. Carroll, B. Casey, D. Cauz, A. Chapelain, S. Chappa, S. Chattopadhyay, R. Chislett, T. E. Chupp, M. Convery, G. Corradi, J. Crnkovic, S. Dabagov, P. T. Debevec, G. Di Sciascio, R. Di Stefano, B. Drendel, V. P. Druzhinin, V. N. Duginov, M. Eads, N. Eggert, A. Epps, R. Fatemi, C. Ferrari, M. Fertl, A. T. Fienberg, A. Fioretti, D. Flay, A. S. Frankenthal, H. Friedsam, E. Frlez, N. S. Froemming, C. Fu, C. Gabbanini, M. Gaisser, S. Ganguly, A. Garcia, J. George, L. K. Gibbons, K. L. Giovanetti, S. Goadhouse, W. Gohn, T. Gorringe, J. Grange, F. Gray, S. Haciomeroglu, T. Halewood-Leagas, D. Hampai, E. Hazen, S. Henry, D. W. Hertzog, J. L. Holzbauer, M. Iacovacci, C. Johnstone, J. A. Johnstone, K. Jungmann, H. Kamal Sayed, P. Kammel, M. Karuza, J. Kaspar, D. Kawall, L. Kelton, K. S. Khaw, N. V. Khomutov, B. Kiburg, S. C. Kim, Y. I. Kim, B. King, N. Kinnaird, I. A. Koop, I. Kourbanis, V. A. Krylov, A. Kuchibhotla, N. A. Kuchinskiy, M. Lancaster, M. J. Lee, S. Lee, S. Leo, L. Li, I. Logashenko, G. Luo, K. R. Lynch, A. Lyon, S. Marignetti, S. Mastroianni, S. Maxfield, M. McEvoy, Z. Meadows, W. Merritt, A. A. Mikhailichenko, J. P. Miller, J. P. Morgan, D. Moricciani, W. M. Morse, J. Mott, E. Motuk, H. Nguyen, Y. Orlov, R. Osofsky, J. -F. Ostiguy, A. Palladino, G. Pauletta, K. Pitts, D. Pocanic, N. Pohlman, C. Polly, J. Price, B. Quinn, N. Raha, E. Ramberg, N. T. Rider, J. L. Ritchie, B. L. Roberts, M. Rominsky, D. L. Rubin, L. Santi, C. Schlesier, Y. K. Semertzidis, Y. M. Shatunov, M. Shenk, A. Smith, M. W. Smith, A. Soha, E. Solodov, D. Still, D. Stöckinger, T. Stuttard, H. E. Swanson, D. A. Sweigart, M. J. Syphers, S. Szustkowski, D. Tarazona, T. Teubner, A. E. Tewlsey-Booth, V. Tishchenko, G. Venanzoni, V. P. Volnykh, T. Walton, M. Warren, L. Welty-Rieger, M. Whitley, P. Winter, A. Wolski, E. Won, M. Wormald, W. Wu, H. Yang, C. Yoshikawa, Albahri, B. Abi T., Al-Kilani, S., Allspach, D., Alonzi, L. P., Anastasi, A., Azfar, F., Babusci, D., Baessler, S., Baranov, V. A., Barzi, E., Bjorkquist, R., Bowcock, T., Cantatore, G., Carey, R. M., Carroll, J., Casey, B., Cauz, D., Chapelain, A., Chappa, S., Chattopadhyay, S., Chislett, R., Chupp, T. E., Convery, M., Corradi, G., Crnkovic, J., Dabagov, S., Debevec, P. T., Di Sciascio, G., Di Stefano, R., Drendel, B., Druzhinin, V. P., Duginov, V. N., Eads, M., Eggert, N., Epps, A., Fatemi, R., Ferrari, C., Fertl, M., Fienberg, A. T., Fioretti, A., Flay, D., Frankenthal, A. S., Friedsam, H., Frlez, E., Froemming, N. S., Fu, C., Gabbanini, C., Gaisser, M., Ganguly, S., Garcia, A., George, J., Gibbons, L. K., Giovanetti, K. L., Goadhouse, S., Gohn, W., Gorringe, T., Grange, J., Gray, F., Haciomeroglu, S., Halewood-Leagas, T., Hampai, D., Hazen, E., Henry, S., Hertzog, D. W., Holzbauer, J. L., Iacovacci, M., Johnstone, C., Johnstone, J. A., Jungmann, K., Kamal Sayed, H., Kammel, P., Karuza, M., Kaspar, J., Kawall, D., Kelton, L., Khaw, K. S., Khomutov, N. V., Kiburg, B., Kim, S. C., Kim, Y. I., King, B., Kinnaird, N., Koop, I. A., Kourbanis, I., Krylov, V. A., Kuchibhotla, A., Kuchinskiy, N. A., Lancaster, M., Lee, M. J., Lee, S., Leo, S., Li, L., Logashenko, I., Luo, G., Lynch, K. R., Lyon, A., Marignetti, S., Mastroianni, S., Maxfield, S., Mcevoy, M., Meadows, Z., Merritt, W., Mikhailichenko, A. A., Miller, J. P., Morgan, J. P., Moricciani, D., Morse, W. M., Mott, J., Motuk, E., Nguyen, H., Orlov, Y., Osofsky, R., Ostiguy, J. -F., Palladino, A., Pauletta, G., Pitts, K., Pocanic, D., Pohlman, N., Polly, C., Price, J., Quinn, B., Raha, N., Ramberg, E., Rider, N. T., Ritchie, J. L., Roberts, B. L., Rominsky, M., Rubin, D. L., Santi, L., Schlesier, C., Semertzidis, Y. K., Shatunov, Y. M., Shenk, M., Smith, A., Smith, M. W., Soha, A., Solodov, E., Still, D., Stöckinger, D., Stuttard, T., Swanson, H. E., Sweigart, D. A., Syphers, M. J., Szustkowski, S., Tarazona, D., Teubner, T., Tewlsey-Booth, A. E., Tishchenko, V., Venanzoni, G., Volnykh, V. P., Walton, T., Warren, M., Welty-Rieger, L., Whitley, M., Winter, P., Wolski, A., Won, E., Wormald, M., Wu, W., Yang, H., and Yoshikawa, C.

Subjects
Precision Physics, Muon magnetic anomaly, Muon g-2 experiment
Abstract

There is a long standing discrepancy between the Standard Model prediction for the muon and the value measured by the Brookhaven E821 Experiment. At present the discrepancy stands at about three standard deviations, with a comparable accuracy between experiment and theory. Two new proposals – at Fermilab and J-PARC – plan to improve the experimental uncertainty by a factor of 4, and it is expected that there will be a significant reduction in the uncertainty of the Standard Model prediction. I will review the status of the planned experiment at Fermilab, E989, which will analyse 21 times more muons than the BNL experiment and discuss how the systematic uncertainty will be reduced by a factor of 3 such that a precision of 0.14 ppm can be achieved.

Published
2015

14. On the anomalous muonium hyperfine field in silicon

Author

E. P. Krasnoperov, Ulrich Zimmermann, B N Nikol’sky, V. N. Duginov, I. G. Ivanter, A N Nezhivoy, K. I. Gritsaj, and A. N. Ponomarev

Subjects
Physics, Muon, Condensed matter physics, Silicon, Muonium, chemistry.chemical_element, Muon spin spectroscopy, Condensed Matter Physics, Polarization (waves), Magnetic field, chemistry, General Materials Science, Hyperfine structure, Single crystal
Abstract

The muon spin precession in the axial-symmetric muonium Mubc was studied in a magnetic field applied along the initial muon polarization which was, in turn, parallel to the [111] axis of a silicon single crystal. Hyperfine fields were measured at temperature T = 12 K. The transversal parameter is in good agreement with work by Blazey et al 1983 Phys. Rev. B 27 15, but obtained in this work is less than the value published by Blazey et al by 0.29 MHz. This discrepancy is attributed to the accuracy of determination of the angle between the [111] axis and the magnetic field direction.

Published
2003

15. Magnetic moment relaxation of a shallow acceptor center in heavily doped silicon

Author

D. Herlach, K. I. Gritsai, Ulrich Zimmermann, T. N. Mamedov, D. G. Andrianov, A. V. Stoikov, V. N. Duginov, Janos Major, V. N. Gorelkin, and O. Kormann

Subjects
Materials science, Physics and Astronomy (miscellaneous), chemistry, Magnetic moment, Silicon, Impurity, Relaxation (NMR), Doping, chemistry.chemical_element, Germanium, Crystalline silicon, Atomic physics, Acceptor
Abstract

Results of studying the temperature dependence of the residual polarization of negative muons in crystalline silicon with germanium (9×10 19 cm −3 ) and boron (4.1×10 18 , 1.34×10 19 , and 4.9×10 19 cm −3 ) impurities are presented. It is found that, similarly to n-and p-type silicon samples with impurity concentrations up to ∼10 17 cm −3 , the relaxation rate ν of the magnetic moment of a μ Al acceptor in silicon with a high impurity concentration of germanium (9×10 19 cm −3 ) depends on temperature as ν∼T q , q≈3 at T=(5–30) K. An increase in the absolute value of the relaxation rate and a weakening of its temperature dependence are observed in samples of degenerate silicon in the given temperature range. Based on the experimental data obtained, the conclusion is made that the spin-exchange scattering of free charge carriers makes a significant contribution to the magnetic moment relaxation of a shallow acceptor center in degenerate silicon at T≲30 K. Estimates are obtained for the effective cross section of the spin-exchange scattering of holes (σ h ) and electrons (σ e ) from an Al acceptor center in Si: σ h ∼10−13 cm2 and σ e ∼8×10−15 cm2 at the acceptor (donor) impurity concentration n a (n d )∼4×1018 cm−3.

Published
2001

16. μSR-spectrometer on the surface muon beam of the JINR phasotron

Author

I.V. Mirokhin, K. I. Gritsaj, T. N. Mamedov, V. G. Olshevsky, V. N. Duginov, V. A. Zhukov, A. V. Stoykov, S.A. Gustov, and V. G. Grebinnik

Subjects
Physics, Cryostat, Muon, Spectrometer, Physics::Instrumentation and Detectors, Solid-state, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Nuclear physics, Positron, Physics::Accelerator Physics, High Energy Physics::Experiment, Electrical and Electronic Engineering, Atomic physics, Nuclear Experiment, Beam (structure)
Abstract

The μSR spectrometer installed on the surface muon beam of the JINR phasotron is described. The possibility of using the surface muon beam with high contamination of positrons in investigations of a solid state by the μSR method is shown. Discrimination of muons from positrons is performed by amplitude analysis and time-of-flight technique. The investigation has been performed at the Laboratory of Nuclear Problems, JINR (Dubna).

Published
2000

17. Magnetic fields acting on muons in textured and single crystalline holmium

Author

A.A Nezhivoy, I. G. Ivanter, V. N. Duginov, Ulrich Zimmermann, A. N. Ponomarev, V. Yu. Pomjakushin, I. A. Krivosheev, K. I. Gritsaj, D. Herlach, B. A. Nikolsky, and V. G. Olshevsky

Subjects
Larmor precession, Materials science, Magnetic structure, Condensed matter physics, chemistry.chemical_element, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Magnetic field, chemistry, Interstitial defect, Antiferromagnetism, Electrical and Electronic Engineering, Holmium, Néel temperature, Single crystal
Abstract

The μSR method was used to measure the internal magnetic fields at interstitial sites of the crystal lattice in holmium, where muons are localized. In a simple helicoid structure all interstitial sites are magnetically equivalent, and thus in a μSR experiment only one muon-spin precession frequency should be observed at a given temperature. In the spin-slip structure, the interstitial fields in different sections of the helicoid are different and the frequency spectrum of the muon signal should be more complicated. Most of the ZF μSR measurements were performed on a holmium polycrystal with distinct texture. High-statistics ZF measurements below the Neel temperature were performed also on a holmium single crystal at several temperatures. The experimental spectrum was well described by a single frequency. This fact characterized the magnetic structure of holmium as a simple spiral. At the same time, the high values of the relaxation rate (up to 60 μs −1 at 10 K ), could be due to overlapping of several frequencies.

Published
2000

18. Study of the magnetic properties of Ce3Pd20Si6 compound

Author

V. Yu. Pomjakushin, K. I. Gritsaj, D. Herlach, C. Baines, Yu. D. Seropegin, V.N. Nikiforov, Anthony A. Amato, A.A Nezhivoy, V. N. Duginov, Ulrich Zimmermann, Alexander Gribanov, A. N. Ponomarev, and I. A. Krivosheev

Subjects
Materials science, Spin glass, Condensed matter physics, Magnetic moment, Nanotechnology, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Transverse plane, Ferromagnetism, Depolarization rate, Moment (physics), Crystallite, Electrical and Electronic Engineering, Superparamagnetism
Abstract

We report lSR studies on a Ce 3 Pd 20 Si 6 polycrystalline sample. Zero-"eld measurements were undertaken to gain information on the magnetic ordering at low temperatures. Below 0.4 K the increase of the muon-spin depolarization rate re#ects the development of a quasi-static ordering of magnetic moments of electronic origin probably randomly oriented. In transverse-"eld studies a clear frequency shift was observed. This fact may be ascribed to the increase of the total-magnetic moment of the superparamagnetic cube containing 8 Ce2 atoms and their ferromagnetic ordering with decreasing temperature. ( 2000 Elsevier Science B.V. All rights reserved.

Published
2000

19. Total rates of nuclear capture of negative muons in the isotopes 132Xe and 40Ar

Author

T. N. Mamedov, K. I. Gritsai, V. A. Zhukov, V. N. Duginov, V. G. Ol'Shevskii, A. V. Stoikov, and V. G. Grebinnik

Subjects
Physics, Nuclear physics, Muon, Physics and Astronomy (miscellaneous), Isotope, Solid-state physics, Phase (matter), Atomic physics
Abstract

The lifetimes of a negative muon in the isotopes 132Xe and 40Ar in the solid phase are measured. The lifetime of μ − in the 1s state of the isotope 132Xe is τ(132Xe)=101.7±1.7 ns, which corresponds to a total nuclear capture rate Λc(132Xe)=9.4±0.2 μs−1. The lifetime of μ − in the isotope 40Ar, viz., τ (40Ar)=568±6 ns, corresponding to a capture rate Λc(40Ar)=1.31±0.01 μs−1, is obtained to several times better accuracy as compared to previously published results.

Published
1999

20. Shallow acceptor centres in silicon studied by means of spin rotation of negative muons

Author

T. N. Mamedov, D. Herlach, I. L. Chaplygin, U. Zimmermann, M. Schefzik, V. N. Gorelkin, Janos Major, V. N. Duginov, and A. V. Stoykov

Subjects
Silicon, Magnetic moment, Relaxation (NMR), Electron shell, Spin–lattice relaxation, chemistry.chemical_element, Atmospheric temperature range, Condensed Matter Physics, Acceptor, Condensed Matter::Materials Science, chemistry, General Materials Science, Atomic physics, Spin (physics)
Abstract

The residual polarization of negative muons has been studied for phosphorus-doped and antimony-doped silicon crystals. The measurements were carried out in a transverse magnetic field of 0.1 T over the temperature region 4 K-300 K. The ionized and neutral states of the pseudo-acceptor were observed in antimony-doped silicon for the first time. The rate of transition from the neutral to the ionized state of the acceptor was found to be equal to over the temperature range 4 K-12 K. The estimated rates of relaxation of the magnetic moment of the acceptor-centre electron shell are and in phosphorus-doped silicon and and in antimony-doped silicon at 4 K and 15 K respectively. The experimental results obtained are interpreted in terms of spin-lattice relaxation of the acceptor magnetic moment and of the acceptor-donor pair formation.

Published
1999

21. Microscopic phase separation inLa2CuO4+xinduced by the superconducting transition

Author

V. Yu. Pomjakushin, Yu. Obukhov, Alexei Zakharov, A. I. Beskrovny, V. N. Duginov, A. Schenck, F. N. Gygax, S. N. Barilo, Anthony A. Amato, A. M. Balagurov, A. N. Ponomarev, and D. Herlach

Subjects
Superconductivity, Physics, Phase transition, Low oxygen, Condensed matter physics, Spinodal decomposition, Condensed Matter::Superconductivity, Neutron diffraction, Excess oxygen, Spectroscopy, Magnetic susceptibility
Abstract

The phase separation (PS) effect in superconducting ${\mathrm{La}}_{2}{\mathrm{CuO}}_{4+x} (xl~0.04)$ single crystals with low oxygen mobility was studied via $\ensuremath{\mu}\mathrm{SR}$ spectroscopy, high-resolution neutron diffraction, and magnetic susceptibility. Despite the fact that all crystals are inside the miscibility gap $(0.01lxl0.06),$ only crystals with a sufficiently large excess oxygen concentration $x=0.04$ show a macroscopic phase separation according to the neutron-diffraction data. However, in all samples a phase transition to an ordered magnetic state was observed by $\ensuremath{\mu}\mathrm{SR}$ spectroscopy concomitantly with the onset of superconductivity. This effect is treated as a microscopic phase separation which is possibly driven by superconductivity.

Published
1998

22. Investigation of acceptor centers in semiconductors with the diamond crystal structure by the μ − SR method

Author

T. N. Mamedov, Ulrich Zimmermann, A. V. Stoykov, D. Herlach, M. Schefzik, V. N. Duginov, V. N. Gorelkin, I. L. Chaplygin, and Janos Major

Subjects
Larmor precession, Materials science, Physics and Astronomy (miscellaneous), Silicon, Magnetic moment, Relaxation (NMR), chemistry.chemical_element, Germanium, Muon spin spectroscopy, Acceptor, Crystal, Condensed Matter::Materials Science, chemistry, Atomic physics
Abstract

The residual polarization of negative muons in crystal silicon samples with phosphorus (P: 1.6×1013 cm−3) and antimony (Sb: 2×1018 cm−3) impurities is investigated. The measurements are made in a 1000 G magnetic field oriented in a direction transverse to the muon spin in the temperature range 4–300 K. The relaxation rate and shift of the precession frequency in the silicon sample with the phosphorus impurity are measured more accurately than previously. It is found that in antimony-doped silicon the acceptor center µ A1 at temperatures below 30 K can be in both ionized and neutral states. The experimental data are interpreted on the basis of spin-lattice relaxation of the magnetic moment of an acceptor center, formation of acceptor-donor pairs, and recombination of charge carriers at the acceptor. Preliminary measurements showed a nonzero residual polarization of negative muons in germanium.

Published
1998

23. A study of the magnetic properties of Ce3Pd20Ge6

Author

A. N. Ponomarev, V.N. Nikiforov, V. N. Duginov, A. V. Gribanov, V. Yu. Pomjakushin, K. I. Gritsaj, Yu. D. Seropegin, and A.A Nezhivoy

Subjects
Physics, Magnetic moment, Condensed matter physics, Silicon, Magnetism, chemistry.chemical_element, Germanium, Depolarization, Muon spin spectroscopy, Condensed Matter Physics, Electronic, Optical and Magnetic Materials, Magnetic field, chemistry, Kondo effect, Electrical and Electronic Engineering
Abstract

The compounds Ce 3 Pd 20 X 6 ( X = Ge , Si ) manifest unusual physical properties which would catalogue them as magnetic Kondo systems. Our zero-field μ SR measurements were undertaken to gain information about the magnetic behaviour at low temperatures. The muon spin relaxation rate was found to increase up to value of 4 μ s - 1 at 50 mK. Below 0.3 K an increase in the depolarization rate is believed to represent the development of quasi-static ordering of magnetic moments of electronic origin. A follow-up series of transverse-field μ SR measurements were performed. The external fields were varied up to 5 kOe and the temperature dependence of the internal magnetic field was found to be similar to that found in Ce 3 Pd 20 Si 6 . The μ SR experiments were carried out at the PSI, Villigen, Switzerland.

Published
2006

24. μSR study of the intermediate heavy-fermion systemCeRuSi2

Author

M. Baran, H. Szymczak, V. G. Olshevsky, A. N. Ponomarev, I. A. Krivosheev, Yu. D. Seropegin, V. Yu. Pomjakushin, K. I. Gritsaj, V. N. Duginov, V. G. Grebinnik, V.N. Nikiforov, T. N. Mamedov, and V. A. Zhukov

Subjects
Physics, Spin polarization, Condensed matter physics, Spintronics, Neutron magnetic moment, Nuclear magnetic moment, Spin echo, Electron magnetic dipole moment, Magnetic dipole, Spin magnetic moment
Published
1997

25. [Untitled]

Author

Anthony A. Amato, Alexei Zakharov, D. Herlach, V. N. Duginov, A. Schenck, F. N. Gygax, V. Yu. Pomjakushin, and A. N. Ponomarev

Subjects
Diffraction, Physics, Superconductivity, Structural phase, Condensed matter physics, Condensed Matter::Superconductivity, Lattice (order), Knight shift, Electron, Single crystal, Magnetic susceptibility
Abstract

Electron spin‐freezing at Tf=8 K has been detected in superconducting (Tc=12\ K) single crystal La2CuO4+y (y\simeq0.03) by ZF‐μSR. According to diffraction data, the crystal is in Bmab phase without any traces of structural phase separation. TF‐μSR experiment has shown that no Abrikosov flux line lattice is formed below Tc. The data allow us to assume that the magnetic and superconducting regions in the crystal are space separated on the microscopic scales ~ 102 A. The presence of large field induced broadening of the Knight shift distribution k\sigma > 1000 ppm indicates that the crystal contains micro‐regions possessing enhanced magnetic susceptibility.

Published
1997

26. [Untitled]

Author

I. A. Krivosheev, V. Yu. Pomjakushin, K. I. Gritsaj, V. N. Duginov, A. N. Ponomarev, A. V. Stoykov, V. G. Grebinnik, I. L. Chaplygin, B. A. Nikolsky, V. N. Gorelkin, V. G. Olshevsky, V. A. Zhukov, and T. N. Mamedov

Subjects
Physics, Range (particle radiation), Muon, Condensed matter physics, Impurity, Relaxation (NMR), Precession, Muon spin spectroscopy, Magnetic field, Exotic atom
Abstract

The dependence of the residual polarization of negative muons in n‐type Si with impurity concentration (1.6\pm 0.2)\times 1013\ cm-3 on temperature in the 10–300 K range has been investigated. Measurements were carried out in external magnetic field of 0.08 T transverse to the muon spin. Muon spin relaxation and frequency shift were observed at temperatures below 30 K. The relaxation rate at 30 K is equal to 0.25\pm 0.08\,μ s-1. The frequency shift at 20 K is equal to 7\times 10-3. Both the relaxation rate and the frequency shift grow with decrease of temperature. Below 30 K the relaxation rate is well described by the dependence \varLambda=bT-q, where q=2.8.

Published
1997

27. Investigation of the magnetic structure of holmium by the muonic method

Author

A. N. Ponomarev, B. A. Nikol'Skii, A. A. Nezhivoi, I. A. Krivosheev, V. Yu. Pomyakushin, V. N. Duginov, and V. G. Ol'Shevskii

Subjects
Physics, Larmor precession, Muon, Fermi contact interaction, Physics and Astronomy (miscellaneous), Magnetic structure, Condensed matter physics, chemistry.chemical_element, Electron, Muon spin spectroscopy, Magnetic field, chemistry, Condensed Matter::Strongly Correlated Electrons, Atomic physics, Holmium
Abstract

The possibility of investigating by the muonic method spin-incommensurate helicoidal structures of rare-earth magnets is examined for the example of holmium. It is shown that at temperatures 20 K

Published
1997

28. [Untitled]

Author

V. Yu. Pomjakushin, K. I. Gritsaj, V.N. Nikiforov, M. Baran, H. Szymczak, Yu. D. Seropegin, A. N. Ponomarev, V. A. Zhukov, V. N. Duginov, I. A. Krivosheev, V. G. Grebinnik, V. G. Olshevsky, and T. N. Mamedov

Subjects
Physics, Paramagnetism, Phase transition, Muon, Ferromagnetism, Magnetic moment, Condensed matter physics, Relaxation (NMR), Muon spin spectroscopy, Magnetic field
Abstract

ZF, LF and TF μSR measurements have been carried out with a polycrystalline CeRuSi2 sample. ZF data show a sharp increase of the muon relaxation rate below the temperature T=12 K (0.42 μ s-1 at T=4.2 K) justifying the phase transition to the magnetically ordered state. The results of LF measurements at T=4.2 K show that the magnetic fields on the muon Bμ, produced by the cerium magnetic moments, are mainly static – external longitudinal field of 150 Oe practically recovers the muon spin polarization. In the paramagnetic phase the polarization decay has an exponential form at all measured temperatures 20 K < T < K, though LF experiment at T=20 K clearly shows a significant static contribution (\sim 75%). This situation is discussed in frames of double relaxation model. The ferromagnetic type of magnetic ordering was proved by hysteresis behavior of (B–H) observed in TF‐experiment.

Published
1997

29. Relaxation and shift of the precession frequency of the spin of a negative muon in n-type silicon

Author

T. N. Mamedov, V. Yu. Pomyakushin, V. N. Duginov, K. I. Gritsai, V. G. Grebinnik, I. A. Krivosheev, V. A. Zhukov, I. L. Chaplygin, A. V. Stoikov, B. A. Nikol'Skii, V. N. Gorelkin, A. N. Ponomarev, and V. G. Ol’shevski

Subjects
Larmor precession, Physics, Muon, Physics and Astronomy (miscellaneous), Silicon, Condensed matter physics, Relaxation (NMR), chemistry.chemical_element, Muon spin spectroscopy, Magnetic field, chemistry, High Energy Physics::Experiment, Atomic physics, Spectroscopy, Spin (physics)
Abstract

The residual polarization of negative muons in n-type silicon with impurity density (1.6±0.2) · 1013 cm−3 is investigated as a function of temperature in the range 10–300 K. The measurements are performed in an external magnetic field of 0.08 T oriented transversely to the spin of the muons. Relaxation of the muon spin and a shift of the precession frequency are observed at temperatures below 30 K. The relaxation rate at 30 K equals 0.25±0.08 μs−1. The shift of the precession frequency at 20 K equals 7 · 10−3. Both the relaxation rate and the shift of the precession frequency increase as the temperature decreases. At temperatures below 30 K the relaxation rate is described well by the relation Λ=bT−q, where q=2.8±0.2.

Published
1996

30. Study of local magnetic fields in the oxide α-Bi2O3 byNQR andμSR techniques

Author

B. A. Nikolsky, B. F. Kirillov, É. A. Kravchenko, V. N. Duginov, A. V. Pirogov, A. N. Ponomarev, V. Yu. Pomjakushin, V. G. Olshevsky, V. A. Suetin, V. G. Orlov, V. G. Grebinnik, T. N. Mamedov, and V. A. Zhukov

Subjects
Nuclear and High Energy Physics, Condensed matter physics, Magnetic energy, Chemistry, Demagnetizing field, Condensed Matter Physics, Magnetic susceptibility, Atomic and Molecular Physics, and Optics, Paramagnetism, Magnetization, Condensed Matter::Superconductivity, Diamagnetism, Physical and Theoretical Chemistry, Local field, Magnetic dipole
Abstract

NQR andμSR investigations of the local magnetic field inα-Bi2O3 were performed. In theNQR experiments onα-Bi2O3 which is usually considered as diamagnetic, the splitting of the spectral lines revealed a local field on the bismuth nuclei. The internal magnetic field obtained byμSR significantly exceeds the dipole field from Bi nuclear magnetic moments. A possible source of the local magnetic fields is partial covalent bonds inα-Bi2O3.

Published
1994

31. μSR investigation of cupric oxide

Author

T. N. Mamedov, V. G. Grebinnik, A. V. Pirogov, V. N. Duginov, V. Yu. Pomjakushin, K. I. Gritsaj, B. F. Kirillov, V. A. Zhukov, I. A. Krivosheev, A. N. Ponomarev, and V. G. Olshevsky

Subjects
Larmor precession, Nuclear and High Energy Physics, Phase transition, Muon, Condensed matter physics, Chemistry, Oxide, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, chemistry.chemical_compound, Condensed Matter::Superconductivity, Phase (matter), Physics::Space Physics, Precession, Condensed Matter::Strongly Correlated Electrons, Physical and Theoretical Chemistry, Thin film, Quantum tunnelling
Abstract

TF and ZFμSR-investigations were performed on high purity CuO powder. By TF measurements a phase transition to the ordered state was observed at 227K. A commensurate-incommensurate phase transition was detected at 213K by ZF measurements. In the commensurate phase we observed the Larmor precession. Four signals were detected below 55K, but by increasing temperature above 190K, precession became having only one component. This fact may be explained by muons tunneling between equivalent sites. In the incommensurate phase the Larmor precession was not detected because of too large damping.

Published
1994

32. Two successive magnetic transitions in Y2Cu2O5 studied by μSR

Author

J. Klamut, A. J. Zaleski, V. Yu. Pomjakushin, T. N. Mamedov, A. N. Ponomarev, I. A. Krivosheev, V. N. Duginov, V. A. Zhukov, A. V. Pirogov, B. F. Kirillov, V. G. Olshevsky, R. Horyń, and V. G. Grebinnik

Subjects
Nuclear and High Energy Physics, Condensed matter physics, Chemistry, Demagnetizing field, Condensed Matter Physics, Magnetic susceptibility, Atomic and Molecular Physics, and Optics, Magnetization, Magnetic anisotropy, Paramagnetism, Superdiamagnetism, Diamagnetism, Physical and Theoretical Chemistry, Magnetic dipole
Abstract

Zero field muon spin rotation and magnetic susceptibility experiments on investigation of magnetic properties of cuprateY2Cu2O5 have been performed in the temperature range 4.2–30 K. Transverse fieldμSR-experiments have been also carried out in order to obtain accurate information about transition temperature and to study the influence of the external magnetic field. Our data show that two magnetic phase transitions occur inY2Cu2O5 with lowering temperature. Upper Neel temperatureTN=13 K is consistent with previous experimental data. We obtained the temperature dependence of the local magnetic field on the muonBμ(T) in the antiferromagnetic phase.Bμ(T) reveals a peculiarity (some change of the slope) near the temperatureTN=7.5 K, which can be interpreted as an additional magnetic phase transition caused by a change in magnetic ordering of the copper subsystem. Applying a small external magnetic field 50 Oe leads to smearing of the peculiarity inBμ(T) dependence.

Published
1994

33. Nonzero initial muon precession phase in AF La2CuO4−y

Author

A. N. Ponomarev, V. Yu. Pomjakushin, V. N. Duginov, A. V. Pirogov, V. A. Zhukov, V. G. Grebinnik, B. F. Kirillov, V. G. Olshevsky, and T. N. Mamedov

Subjects
Physics, Nuclear and High Energy Physics, Muon, Condensed matter physics, Muon spin spectroscopy, Atmospheric temperature range, Condensed Matter Physics, Polarization (waves), Atomic and Molecular Physics, and Optics, Magnetic field, Zero field, Condensed Matter::Superconductivity, Antiferromagnetism, Condensed Matter::Strongly Correlated Electrons, Physical and Theoretical Chemistry, Néel temperature
Abstract

ZF, LF and TF μSR experiments with antiferromagnetic (AF) ceramical samples La2−xSrxCuO4−y have been performed in the temperature range 10–300 K. Zero field muon spin polarization functions obtained below the Neel temperature clearly show a nonzero initial precession phaseϕ∼-−0.35 rad. We propose an explanation based on existence of the dynamical magnetic fields on the muon.

Published
1994

34. Investigation of the behaviour of the impurity atoms in Si by μ− SR-method

Author

V. G. Olshevsky, V. G. Grebinnik, T. N. Mamedov, V. A. Zhukov, A. N. Ponomarev, V. N. Gorelkin, V. N. Duginov, A. V. Pirogov, V. A. Suetin, B. F. Kirillov, B. A. Nikolsky, V. Yu. Pomjakushin, and K. I. Gritsaj

Subjects
Nuclear and High Energy Physics, Range (particle radiation), Muon, Condensed matter physics, Spin polarization, Chemistry, Atmospheric temperature range, Muon spin spectroscopy, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Magnetic field, Impurity, Relaxation (physics), High Energy Physics::Experiment, Physical and Theoretical Chemistry, Atomic physics
Abstract

The dependence of the residual polarization of negative muons in p-type Si on temperature in the 4.2–270 K range has been investigated. Measurements were carried out in external magnetic field of 0.08 T transverse to the muon spin. The impurity concentration in the sample was 2 · 1013 cm−3. Muon spin relaxation was observed at temperatures below 30 K. The relaxation rate atT=30 K is equal to 0.18±0.08μs−1. The relaxation rate grows with the decrease of temperature and at 4.2 K exceeds 30μs−1. The value of the residual polarization at zero timeP(t=0) is constant within the investigated temperature range.

Published
1994

35. Antiferromagnetic properties of solid oxygen studied by positive muons

Author

V. Yu. Pomyakushin, V. A. Zhukov, S. N. Shilov, A. V. Pirogov, Vyacheslav G. Storchak, V. G. Olshevsky, A. B. Lazarev, V. G. Grebinnik, V. N. Duginov, and B. F. Kirillov

Subjects
Physics, Larmor precession, Muon, Condensed matter physics, Heisenberg model, Transition temperature, Solid oxygen, General Physics and Astronomy, Antiferromagnetism, Condensed Matter::Strongly Correlated Electrons, Muon spin spectroscopy, Atmospheric temperature range
Abstract

A zero magnetic field muon spin rotation study of α-O2 (antiferromagnetic phase of solid oxygen) in the temperature range 10–24 K is presented. Static magnetic order has been observed below the α-β transition temperature. The temperature dependence of the muon precession frequency exhibits a behavior characteristics of the two-dimensional Heisenberg spin-1 system with anisotropy parameter α ∼ 10−2.

Published
1994

36. Magnetic-flux distribution and the magnetic penetration depth in superconducting polycrystallineBi2Sr2Ca1−xYxCu2O8+δandBi2−xPbxSr2CaCu2O8+δ

Author

V. Y. Pomjakushin, FN Gygax, Vyacheslav G. Storchak, V. G. Olshevsky, S. Kapusta, B. F. Kirillov, J. Bock, A. Schenck, H. Maletta, A. V. Pirogov, A. N. Ponomarev, V. G. Grebinnik, S. N. Shilov, Anthony A. Amato, M Weber, A. B. Lazarev, V. A. Zhukov, and V. N. Duginov

Subjects
Physics, Superconductivity, Statistics::Theory, Crystallography, Magnetization, Valence (chemistry), Statistics::Applications, Condensed matter physics, Lattice (order), Transition temperature, Crystallite, Penetration depth, Magnetic flux
Abstract

Results on the systematics of the magnetic penetration depth ${\ensuremath{\lambda}}_{\mathit{a}\mathit{b}}$ in the high-temperature superconductors ${\mathrm{Bi}}_{2}$${\mathrm{Sr}}_{2}$${\mathrm{Ca}}_{1\mathrm{\ensuremath{-}}\mathit{z}}$${\mathrm{Y}}_{\mathit{z}}$${\mathrm{Cu}}_{2}$${\mathrm{O}}_{8+\mathrm{\ensuremath{\delta}}}$ (z=0,0.1,0.2,0.3,0.4,0.45) and ${\mathrm{Bi}}_{2\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Pb}}_{\mathit{x}}$${\mathrm{Sr}}_{2}$${\mathrm{CaCu}}_{2}$${\mathrm{O}}_{8+\mathrm{\ensuremath{\delta}}}$ (x=0.15,0.30,0.70) are reported from muon-spin-rotation measurements on polycrystalline samples with known oxygen excess \ensuremath{\delta}. In determining ${\ensuremath{\lambda}}_{\mathit{a}\mathit{b}}$ various additional sources for inhomogeneous internal field distributions, besides the one arising from the flux-line lattice, have been critically taken into account. The most important one arises from a type of powder broadening due to the anisotropy of the field-cooled magnetization. It is found that ${\ensuremath{\lambda}}_{\mathit{a}\mathit{b}}$ in the Y-doped compounds correlates in the expected manner with the nominal hole-carrier concentration p (${\ensuremath{\lambda}}_{\mathit{a}\mathit{b}}^{\mathrm{\ensuremath{-}}2}$\ensuremath{\propto}p) while the Pb-doped compounds ${\ensuremath{\lambda}}_{\mathit{a}\mathit{b}}$ is practically independent of p. It is concluded that Pb doping (valence state is +2) does not increase the density of free charge carriers in agreement with results from Hall-effect measurements. No correlation between ${\ensuremath{\lambda}}_{\mathit{a}\mathit{b}}^{\mathrm{\ensuremath{-}}2}$ and ${\mathit{T}}_{\mathit{c}}$ in the manner seen in the 1:2:3 family is found in the present case.

Published
1993

37. On the nature of the muon complex in condensed oxygen

Author

V. G. Olshevsky, V. G. Grebinnik, A. B. Lazarev, V. N. Duginov, A. V. Pirogov, V. A. Zhukov, B. F. Kirillov, S. N. Shilov, V. Yu. Pomyakushin, and Vyacheslav G. Storchak

Subjects
Physics, Muon, Magnetic moment, Condensed matter physics, Analytical chemistry, General Physics and Astronomy, chemistry.chemical_element, Atmospheric temperature range, Oxygen, Paramagnetism, chemistry, Antiferromagnetism, Diamagnetism, Liquid oxygen
Abstract

Muon precession parameters in liquid oxygen as well as α-, β- and γ-phases of crystalline oxygen have been measured in the temperature range 10–90 K. It was found that the muon polarization P =1 in liquid O 2 , γ-O 2 and β-O 2 . The local field at the muon site has been measured in the antiferromagnetic α-phase of oxygen ( B 0 =1.2 kG). The analysis of the data obtained shows that about 40% of the muons in oxygen form a paramagnetic complex (presumably MuO 2 or O 2 Mu + ) and about 60% of them form a diamagnetic compound.

Published
1992

38. Magnetism in disordered magnetic Fe82−xNixCr18

Author

V. A. Zhukov, I. I. Gurevich, B. A. Nikolski, N. A. Tarasov, S. G. Barsov, A. L. Getalov, S. P. Kruglov, A. B. Lazarev, S. V. Maleyev, A. N. Ponomarev, V. A. Suetin, V. N. Duginov, E. I. Maltsev, A. V. Pirogov, B. F. Kirillov, V. G. Ol’shevski, V. G. Grebinnik, S. L. Ginsburg, L. A. Kuzmin, A. I. Klimov, G. V. Shcherbakov, S. N. Shilov, V. P. Koptev, and S. M. Mikirtych'yants

Subjects
Physics, Nuclear and High Energy Physics, Paramagnetism, Zero field, Condensed matter physics, Magnetism, Physical and Theoretical Chemistry, Magnetic alloy, Thin film, Condensed Matter Physics, Condensed Matter::Disordered Systems and Neural Networks, Local field, Atomic and Molecular Physics, and Optics
Abstract

The zero field μSR-method has been used to study the magnetism in the disordered magnetic alloy Fe82−xNixCr18 near the three-critical, pointx=25. The dynamic and static local field distributions are analyzed. The difference between spin-glass states obtained either from the paramagnetic or after the double transition is discussed.

Published
1991

39. The μSR investigation of multi-phase Bi-based superconductors

Author

S. Šafrata, V. G. Olshevsky, T. Hanslik, V. Yu. Pomjakushin, B. F. Kirillov, V. N. Sumarokov, A. B. Lazarev, V. G. Grebinnik, S. Kapusta, A. V. Pirogov, V. N. Duginov, V. A. Zhukov, Daniel Niznansky, A. M. Brjazkalo, I. K. Ageenkova, B. A. Nikolsky, S. N. Shilov, Josef Šebek, A. N. Ponomarev, H. Šíchová, and A. G. Chistov

Subjects
Superconductivity, Nuclear and High Energy Physics, Materials science, Condensed matter physics, Multi phase, Physical and Theoretical Chemistry, Condensed Matter Physics, Atomic and Molecular Physics, and Optics
Published
1991

40. The μSR study of the relaxation of Ho and Er magnetic moments in high-Tc 1-2-3 compounds

Author

V. Yu. Pomjakushin, V. G. Olshevsky, V. G. Grebinnik, S. Kapusta, A. I. Morozov, A. N. Ponomarev, E. P. Krasnoperov, V. A. Zhukov, V. A. Suetin, B. F. Kirillov, B. A. Nikolsky, S. N. Shilov, A. B. Lazarev, V. N. Duginov, I. I. Gurevich, and A. V. Pirogov

Subjects
Nuclear and High Energy Physics, High-temperature superconductivity, Condensed matter physics, Magnetic moment, Chemistry, chemistry.chemical_element, Depolarization, Muon spin spectroscopy, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, law.invention, Ion, law, Lattice (order), Physical and Theoretical Chemistry, Ground state, Holmium
Abstract

High temperature superconductors HoBa2Cu3O7−δ (T c ≅93 K), Ho0.5Y0.5Ba2Cu3O7−δ (T c ≅93 K) and ErBa2Cu3O7−δ (T c ≅95 K) were investigated by the zero-field μSR-technique. The muon spin depolarisation rate connected with the fluctuation frequency of rare-earth ion magnetic moments was measured. It was found that the samples with holmium show a fast increase of the muon spin depolarisation rate at temperatures below 20 K, while in ErBa2Cu3O7−δ the depolarisation rate remains low in the whole temperature region studied (4.2 K-270 K). The sharp difference between the behaviours of the muon spin depolarisation rate may be explained by the difference between the ground state of Ho3+ and Er3+ ions in the crystalline field of the lattice.

Published
1991

41. The μSR investigations on the phasotron at Dubna: The present and the future

Author

A. B. Lazarev, V. G. Zinov, V. N. Duginov, I. A. Gaganov, I. I. Gurevich, S. Kapusta, V. S. Roganov, A. N. Ponomarev, V. Yu. Pomjakushin, V. G. Olshevsky, V. H. Dodokhov, Josef Šebek, V. G. Grebinnik, Vyacheslav G. Storchak, B. F. Kirillov, A. V. Pirogov, V. A. Suetin, B. A. Nikolsky, S. N. Shilov, V. A. Zhukov, S. Šafrata, and E. P. Krasnoperov

Subjects
Nuclear physics, Physics, Nuclear and High Energy Physics, Physical and Theoretical Chemistry, Condensed Matter Physics, Atomic and Molecular Physics, and Optics
Abstract

After conversion of the LNP JINR phasotron new opportunities have been opened for μSR-research. A new round of investigations has begun since 1987. In this paper we present the summary of the results achieved and give some prospects for future investigations.

Published
1991

42. The comparative study of irreversibility effects in Nb foil and high-temperature superconducting ceramics by μSR

Author

S. Kapusta, A. V. Pirogov, V. Yu. Pomjakushin, A. N. Ponomarev, V. A. Zhukov, A. B. Lazarev, V. N. Duginov, B. F. Kirillov, S. N. Shilov, V. G. Olshevsky, and V. G. Grebinnik

Subjects
Superconductivity, Nuclear and High Energy Physics, Flux pumping, Materials science, Condensed matter physics, London penetration depth, Niobium, chemistry.chemical_element, Superconducting magnetic energy storage, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Magnetic field, chemistry, Meissner effect, Condensed Matter::Superconductivity, Physical and Theoretical Chemistry, Type-II superconductor
Abstract

We present the results of investigations of superconducting niobium and high temperature ceramical superconductor La1.9Sr0.1CuO4 by the μSR technique. The experiments with the niobium sample confirm high reliability of the μSR-technique in determining such characteristics of type II superconductors asTc,Hc1,Hc2, the magnetic field penetration depth λ, and the critical current densityJc. The analysis of the field dependencies of the distribution width and mean value of the magnetic fields on the muon when the samples are magnetized is carried out. A qualitative difference in the behaviour of the magnetic field distribution width in Nb and LaSrCuO is revealed. Whilst the niobium data are well described in the frame of the critical state model, application of a similar approach to the high-Tc superconductor does not give a satisfactory description of our experimental results.

Published
1991

43. Study of condensed nitrogen by μSR method

Author

V. G. Grebennik, A. V. Pirogov, S. Kapusta, Vyacheslav G. Storchak, A. B. Lazarev, B. A. Nikolsky, S. N. Shilov, V. N. Duginov, V. A. Zhukov, and B. F. Kirillov

Subjects
Nuclear and High Energy Physics, Phase transition, Muon, Chemistry, Muonium, Relaxation (NMR), Muon spin spectroscopy, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Solid nitrogen, Excited state, Physics::Accelerator Physics, High Energy Physics::Experiment, Physics::Atomic Physics, Physical and Theoretical Chemistry, Atomic physics, Hyperfine structure
Abstract

The temperature dependences of parameters of the muon spin relaxation in liquid and crystalline nitrogen have been studied. It has been established that in condensed nitrogen there takes place a fast depolarization of muons. An anomalous behaviour of the amplitude and phase of muon precession is found in the vicinity of the orientation phase transition in solid nitrogen. It has been shown that muon spin relaxation parameters in nitrogen do not change at reduction of the oxygen impurity content from 0.7·10−4 to 10−6. The fast depolarization of muons in condensed nitrogen is apparently due to the formation of muonium atoms. To explain the phenomena observed, a model of the muonium chemical reaction is proposed. The initial phase of the muon precession has been measured as a function of the perpendicular magnetic field to determine the state of short-lived muonium in nitrogen. It has been determined that muonium in nitrogen is in an excited state. Consideration of the nuclear hyperfine interaction of muonium in condensed nitrogen makes it possible to give a qualitative explanation for the temperature dependence of the initial amplitude of the muon precession.

Published
1991

44. Transversal field μSr-measurements of the magnetic properties of the high-T c ceramic Bi-Sr-Ca-Cu-O

Author

V. G. Olshevsky, V. Valvoda, A. N. Ponomarev, A. V. Pirogov, I. I. Gurevich, Josef Šebek, V. Y. Pomjakushin, V. A. Suetin, A. B. Lazarev, S. Kapusta, V. N. Duginov, V. G. Grebinnik, B. F. Kirillov, B. A. Nikolsky, S. N. Shilov, J. Burianek, S. Šafrata, and V. A. Zhukov

Subjects
Nuclear and High Energy Physics, Materials science, Field (physics), Condensed matter physics, Transversal (combinatorics), visual_art, visual_art.visual_art_medium, Ceramic, Physical and Theoretical Chemistry, Thin film, Condensed Matter Physics, Magnetic susceptibility, Atomic and Molecular Physics, and Optics
Published
1990

45. Penetration depth and pinning effects in high-Tc superconductors La-Sr-Cu-O and (Er, Ho)-Ba-Cu-O studies by μSR

Author

A. B. Lazarev, V. N. Duginov, S. Kapusta, A. G. Peresada, O. E. Omelyanovsky, B. F. Kirillov, I. P. Borovinskaya, V. Y. Pomjakushin, V. R. Karasik, D. T. Bezhitadze, M. D. Nersesyan, E. P. Krasnoperov, Y. F. Eltzev, I. I. Gurevich, A. N. Ponomarev, G. F. Tavadze, V. G. Grebinnik, V. G. Olshevsky, V. A. Suetin, V. A. Zhukov, A. V. Pirogov, B. A. Nikolsky, and S. N. Shilov

Subjects
Superconductivity, Nuclear and High Energy Physics, Materials science, Muon, Condensed matter physics, London penetration depth, chemistry.chemical_element, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, Magnetic field, chemistry, visual_art, Lanthanum, Perpendicular, visual_art.visual_art_medium, Ceramic, Physical and Theoretical Chemistry, Penetration depth
Abstract

We report the results of μSR investigations of the ceramic samples La2-xSrxCuO4-σ (x=0.1, 0.15, 0.25) and ReBa2Cu3O7-σ (Re=Er, Ho, Y0.5Ho0.5) in the external magnetic field 0–800 Oe. The measurements were performed by the ZFC and FC methods. The irreversibility effects were studied at several temperatures by measuring the mean value and the width of the magnetic field distribution on the muon in the step by step procedure of increasing and subsequent decreasing of the external field. The temperature dependences of the magnetic penetration depth perpendicular to the basal plane λ⊥ were obtained. For the lanthanum sample with 0.15 of Sr its value at the zero temperature is λ⊥ (0)=2400 A, for Er-Ba-Cu-O λ⊥ (0)=1600 A.

Published
1990

46. Antiferromagnetism and spin-glass-like behaviour in ceramics La2−xSrxCuO4 studied by μSR

Author

A. N. Ponomarev, A. B. Lazarev, A. G. Persada, S. Kapusta, V. G. Grebinnik, A. V. Pirogov, V. N. Duginov, O. E. Omelyanovski, I. I. Gurevich, V. R. Kapasik, V. A. Suetin, B. F. Kirillov, I. P. Borovinskaya, Y. F. Eltzev, V. A. Zhukov, M. D. Nersesyan, V. Y. Pomjakushin, B. A. Nikolsky, S. N. Shilov, and V. G. Olshevsky

Subjects
Nuclear and High Energy Physics, Spin glass, Materials science, Condensed matter physics, visual_art, visual_art.visual_art_medium, Antiferromagnetism, Ceramic, Physical and Theoretical Chemistry, Thin film, Condensed Matter Physics, Atomic and Molecular Physics, and Optics
Published
1990

47. Magnetic measurements and simulations for a 4-magnet dipole chicane for the International Linear Collider

Author

A. Fisher, S. Kostromin, M. Woods, N. Morozov, V. N. Duginov, M. Viti, C. Hast, H. Juergen Schreiber, Z. M. Szalata, and R. Arnold

Subjects
Physics, Nuclear physics, Dipole, Magnetic measurements, International Linear Collider, Spectrometer, Electron bunches, Magnet, Chicane
Abstract

T-474 at SLAC is a prototype BPM-based energy spectrometer for the ILC. We describe magnetic measurements and simulations for the 4-magnet chicane used in T-474.

Published
2007

48. A prototype energy spectrometer for the ILC at end station A in SLAC

Author

V. N. Duginov, H. J. Schreiber, Gary Boorman, F. Gournaris, N. Morozov, M. Wing, C. Hast, Michael Hildreth, M. A. Thomson, M. Woods, S. Kostromin, R. Arnold, Alexey Lyapin, M. Slater, Z. M. Szalata, E. Petigura, D. McCormick, M. Sadre-Bazzaz, Yu G. Kolomensky, M. Viti, Chris Adolphsen, M. V. Chistiakova, D. R. Ward, Stewart Boogert, D. J. Miller, and B. Maiheu

Subjects
International Linear Collider, Physics::Instrumentation and Detectors, prototype energy spectrometer chicane, Particle beam measurements, electron accelerators, prototypes, Linear particle accelerator, dipole magnets, high resolution beam position monitors, law.invention, Nuclear physics, Energy measurement, law, particle beam diagnostics, beam energy, Aerospace engineering, Energy resolution, Chicane, Spectroscopy, Physics, Spectrometer, linear colliders, business.industry, Particle accelerator, stability, magnetic spectrometer, Particle beams, Testing, international linear collider, BPM, ILC, Magnet, Measuring instrument, Magnets, Physics::Accelerator Physics, Extraterrestrial measurements, business, particle beam stability, SLAC, Beam (structure), accelerator magnets, beam position monitor system
Abstract

759291 3 pp. (2007)., The main physics program of the International Linear Collider requires a measurement of the beam energy with a relative precision of the order 10^-4 or better. A magnetic spectrometer using high resolution beam position monitors (BPMs) has been proposed to achieve this goal. A prototype spectrometer chicane employing four dipole magnets is currently under development at the End Station A in SLAC, intending to demonstrate the required resolution and stability of this method and investigate possible systematic effects and operational issues. This contribution reports on the successful commissioning of the beam position monitor system and the resolution and stability achieved. Also, the initial results from a run with a full spectrometer chicane are presented.

Published
2007

49. London penetration depth in Bi-based high-Tccompounds

Author

M. Weber, A. Schenck, V. A. Zhukov, A. V. Pirogov, S. Kapusta, V. G. Olshevsky, B. F. Kirillov, A. N. Ponomarev, F. N. Gygax, V. G. Grebinnik, Vyacheslav G. Storchak, V. Yu. Pomjakushin, V. N. Duginov, P. Birrer, E. Lippelt, H. Maletta, and Anthony A. Amato

Subjects
Physics, Superconductivity, Coupling, Condensed matter physics, Relaxation (NMR), Metals and Alloys, London penetration depth, BCS theory, Muon spin spectroscopy, Condensed Matter Physics, Lambda, Materials Chemistry, Ceramics and Composites, Basal plane, Electrical and Electronic Engineering
Abstract

The muon spin relaxation was measured in the high-Tc superconductors Bi2(Sr1.3Ca0.7)CuO6.2, Bi2Sr2CaCu2O8.16, (Bi1.85Pb0.15)Sr2CaCu2O8.18 and (Bi1.83Pb0.25)Sr1.97Ca1.97 Cu3.07Ox. The data were analysed in order to determine the London penetration depth lambda ab parallel to the basal plane. In all investigated samples lambda ab revealed a temperature dependence which can be explained with the framework of conventional BCS theory in the weak coupling limit.

Published
1991

50. Fluctuation of rare-earth atom magnetic moments in superconducting ceramics (Ho,Er)-Ba-Cu-O studied by μSR

Author

I. I. Gurevich, G. F. Tavadze, V. A. Suetin, A. B. Lazarev, E. P. Krasnoperov, V. N. Duginov, B. F. Kirillov, A. V. Pirogov, B. A. Nikolsky, S. N. Shilov, V. A. Zhukov, V. G. Grebinnik, V. Y. Pomjakushin, A. N. Ponomarev, V. G. Olshevsky, S. Kapusta, and D. T. Bezhitadze

Subjects
Physics, Superconductivity, Nuclear and High Energy Physics, Magnetic moment, Spin polarization, Condensed matter physics, Relaxation (NMR), Rare earth, Muon spin spectroscopy, Condensed Matter Physics, Atomic and Molecular Physics, and Optics, visual_art, Atom, visual_art.visual_art_medium, Ceramic, Physical and Theoretical Chemistry
Abstract

Zero field muon spin relaxation measurements of the ceramic high-Tc superconductors HoBa2Cu3O7-σ, Oc≃93 K) and ErBa2Cu3O7-σ (Tc≃95 K) reveal the sharp difference between the behaviours of the muon spin relaxation rate at temperatures below 20K. This fact may be explained by assumption that the frequency of fluctuations of Er magnetic moments exceeds by far the fluctuation frequency of Ho in 1-2-3 compounds.

Published
1990

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