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Journal Articles

Improvement of the longitudinal phase space tomography at the J-PARC synchrotrons

Okita, Hidefumi; Tamura, Fumihiko; Yamamoto, Masanobu; Nomura, Masahiro; Shimada, Taihei; Saha, P. K.; Yoshii, Masahito*; Omori, Chihiro*; Sugiyama, Yasuyuki*; Hasegawa, Katsushi*; et al.

Journal of Physics; Conference Series, 2687, p.07200_1 - 072005_7, 2024/01

Longitudinal phase space tomography is an effective measurement tool for acquiring the longitudinal phase space distribution. For the J-PARC synchrotrons, tomography, which can take into account the beam dynamics such as longitudinal space charge effect and nonlinearity, is desired, as the beam power increases. In this study, for the J-PARC synchrotron, the CERN's tomography, which employs the hybrid algorithm that can consider the beam dynamics for reconstruction, is introduced and benchmarked. The benchmark results show that the CERN's tomography has the ability to measure the longitudinal phase space distribution accurately, in the high-power beam operation at the J-PARC synchrotrons.

Journal Articles

Arsenic removal from contaminated water utilizing novel green composite ${it Chlorella vulgaris}$ and nano zero-valent iron

Islam, M. S.*; Maamoun, I.; Falyouna, O.*; Eljamal, O.*; Saha, B. B.*

Journal of Molecular Liquids, 370, p.121005_1 - 121005_11, 2023/01

 Times Cited Count:4 Percentile:83.65(Chemistry, Physical)

Journal Articles

$$beta^-$$ decay of exotic P and S isotopes with neutron number near 28

Tripathi, V.*; Bhattacharya, S.*; Rubino, E.*; Benetti, C.*; Perello, J. F.*; Tabor, S. L.*; Liddick, S. N.*; Bender, P. C.*; Carpenter, M. P.*; Carroll, J. J.*; et al.

Physical Review C, 106(6), p.064314_1 - 064314_14, 2022/12

 Times Cited Count:1 Percentile:54.36(Physics, Nuclear)

no abstracts in English

Journal Articles

Laser stripping for 1.3 GeV H$$^{-}$$ beam at the SNS

Gorlov, T.*; Aleksandrov, A.*; Cousineau, S.*; Liu, Y.*; Oguz, A. R.*; Kay, M.*; Saha, P. K.

Proceedings of the 2022 North American Particle Accelerator Conference (NAPAC 2022) (Internet), p.702 - 704, 2022/08

Journal Articles

Modifications in the nanoparticle-protein interactions for tuning the protein adsorption and controlling the stability of complexes

Kumar, S.*; Saha, D.*; Takata, Shinichi; Aswal, V. K.*; Seto, Hideki

Applied Physics Letters, 118(15), p.153701_1 - 153701_7, 2021/04

Journal Articles

$$g$$-factor measurement of the 2738 keV isomer in $$^{135}$$La

Laskar, Md. S. R.*; Saha, S.*; Palit, R.*; Mishra, S. N.*; Shimizu, Noritaka*; Utsuno, Yutaka; Ideguchi, Eiji*; Naik, Z.*; Babra, F. S.*; Biswas, S.*; et al.

Physical Review C, 99(1), p.014308_1 - 014308_6, 2019/01

 Times Cited Count:6 Percentile:60.34(Physics, Nuclear)

no abstracts in English

Journal Articles

Studies of high density baryon matter with high intensity heavy-ion beams at J-PARC

Sako, Hiroyuki; Harada, Hiroyuki; Sakaguchi, Takao*; Chujo, Tatsuya*; Esumi, Shinichi*; Gunji, Taku*; Hasegawa, Shoichi; Hwang, S.; Ichikawa, Yudai; Imai, Kenichi; et al.

Nuclear Physics A, 956, p.850 - 853, 2016/12

 Times Cited Count:12 Percentile:65.93(Physics, Nuclear)

Journal Articles

Anisotropic two-dimensional electron gas at the LaAlO$$_{3}$$/SrTiO$$_{3}$$ (110) interface

Annadi, A.*; Zhang, Q.*; Renshaw Wang, X.*; Tuzla, N.*; Gopinadhan, K.*; L$"u$, W. M.*; Roy Barman, A.*; Liu, Z. Q.*; Srivastava, A.*; Saha, S.*; et al.

Nature Communications (Internet), 4, p.1838_1 - 1838_7, 2013/05

 Times Cited Count:94 Percentile:94.71(Multidisciplinary Sciences)

Journal Articles

Novel features in filled skutterudites containing rare-earth elements with a plural number of 4f-electrons

Sato, Hideyuki*; Aoki, Yuji*; Kikuchi, Daisuke*; Sugawara, Hitoshi*; Higemoto, Wataru; Oishi, Kazuki; Ito, Takashi; Heffner, R. H.; Saha, S. R.*; Koda, Akihiro*; et al.

Physica B; Condensed Matter, 404(5-7), p.749 - 753, 2009/04

 Times Cited Count:5 Percentile:25.63(Physics, Condensed Matter)

Wide varieties of strongly correlated electron phenomena are performed on the stage of a filled skutterudite structure. Especially when one of the players contains a plural number of 4f electrons, the orbital degrees of freedom play a major role as a new type of nonmagnetic and/or weak-magnetic phenomena. Several examples found in Pr- and Sm-based filled skutterudites are introduced in relation to muon spin relaxation experiments.

Journal Articles

Multi-wire profile monitor for J-PARC 3GeV RCS

Hiroki, Seiji; Hayashi, Naoki; Kawase, Masato; Noda, Fumiaki; Saha, P. K.; Sako, Hiroyuki; Takahashi, Hiroki; Ueno, Akira; Arakida, Yoshio*; Lee, S.*; et al.

Proceedings of 11th European Particle Accelerator Conference (EPAC '08) (CD-ROM), p.1131 - 1133, 2008/06

A set of six multi-wire profile monitors (MWPMs) has been installed in the injection area of the RCS (Rapid-Cycling Synchrotron), and contributed to the initial commissioning for establishing an optimum injection orbit. The Au coated W wires (0.1 mm dia.) for the H$$^{-}$$ beam are fixed to a ceramic wind frame for two directions (horizontal and vertical with 17.7 deg. tilt, typically 51 wires with 2.9 mm or 9.5 mm distance), and the frame can be scanned for horizontal or vertical direction by using a stepping-motor driven actuator. A combination of the 17.7 deg. tilt wires and the precise scan function provides two step measurements, i.e. a rough profile is obtained only at one shot, and a detailed profile is measured for typically 101 shots (10 mm scan at 0.1 mm interval) thereafter. The beam induced charge signals are amplified, integrated and held by using a signal processing circuit. The signals are sequentially retrieved through multiplexers and digitized for obtaining a beam profile.

Journal Articles

The Status of the J-PARC RCS beam monitor system

Hayashi, Naoki; Hiroki, Seiji; Saha, P. K.; Saeki, Riuji; Toyokawa, Ryoji*; Yamamoto, Kazami; Yoshimoto, Masahiro; Arakawa, Dai*; Hiramatsu, Shigenori*; Lee, S.*; et al.

Proceedings of 5th Annual Meeting of Particle Accelerator Society of Japan and 33rd Linear Accelerator Meeting in Japan (CD-ROM), p.243 - 245, 2008/00

The J-PARC RCS has been beam commissioned since fall 2007. During such a short period, the following items have been established. Establishment of the injection orbit, beam circulation, acceleration up to 3GeV, optics parameters measurements and it achieved 50 kW beam power (4$$times$$10$$^{12}$$ ppb). The beam monitor system has an important role for smooth beam commissioning. This paper describes the status of the beam monitor system, BPM, Injection monitors, IPM, current monitor, tune meter and BLM of the RCS.

Journal Articles

Anomalous magnetic phase in an undistorted pyrochlore oxide Cd$$_2$$Os$$_2$$O$$_7$$ induced by geometrical frustration

Koda, Akihiro*; Kadono, Ryosuke*; Oishi, Kazuki; Saha, S. R.*; Higemoto, Wataru; Yonezawa, Shigeki*; Muraoka, Yuji*; Hiroi, Zenji*

Journal of the Physical Society of Japan, 76(6), p.063703_1 - 063703_4, 2007/06

 Times Cited Count:17 Percentile:67.08(Physics, Multidisciplinary)

We report on the muon spin relaxation study of a pyrochlore oxide, Cd$$_2$$Os$$_2$$O$$_7$$, which exhibits a metal-insulator transition. It reveals strong spin fluctuation below the MI transition, suggesting a predominant role of geometrical spin frustration. Meanwhile, an incommensurate spin density wave discontinuously develops at lower temperature. These observations strongly suggest the occurrence of an anomalous magnetic transition and associated change in the local spin dynamics in undistorted pyrochlore antiferromagnet.

Journal Articles

Resonant X-ray scattering of PrRu$$_4$$P$$_{12}$$

Ishii, Kenji; Tsutsui, Satoshi*; Hao, L.*; Hasegawa, Tomoo*; Iwasa, Kazuaki*; Tsubota, Masami; Inami, Toshiya; Murakami, Yoichi*; Saha, S. R.*; Sugawara, Hitoshi*; et al.

Journal of Magnetism and Magnetic Materials, 310(2, Part1), p.e178 - e180, 2007/03

PrRu$$_4$$P$$_{12}$$ shows a metal-insulator (MI) transition at $$T_{mathrm MI} simeq$$ 62 K accompanied by a structural phase transition. Because LaRu$$_4$$P$$_{12}$$ without $$4f$$ electrons does not shows the MI transition, $$4f$$ electrons in the Pr atom plays an important role in the transition. In order to elucidate a modulation of electronic states of Pr, we have carried out a resonant X-ray scattering study of PrRu$$_4$$P$$_{12}$$ at Pr $$L_2$$- and $$L_3$$-edges. Below $$T_{mathrm MI}$$, resonant signal at the absorption main-edge was successfully observed at the superlattice reflections of the modulation vector $$vec{q}=(1,0,0)$$ in addition to the energy-independent component from the lattice distortion. Because the reflection contains the difference of anomalous scattering factors between two Pr atoms in the unit cell, two different electronic states are actually ordered below $$T_{MI}$$. Furthermore we found that the polarization of X-ray is mostly unrotated even at the resonance, which indicates that the resonant scattering in PrRu$$_4$$P$$_{12}$$ is almost isotropic.

Journal Articles

Knight shift measurements in the superconducting state of Pr$$_{1-x}$$La$$_x$$Os$$_4$$Sb$$_{12}$$ (X=0.4) probed by $$mu$$SR

Higemoto, Wataru; Aoki, Yuji*; Oishi, Kazuki; Ito, Takashi; Heffner, R. H.; Saha, S. R.*; Koda, Akihiro*; Sato, Hideyuki*; Kadono, Ryosuke*; Kikuchi, Daisuke*; et al.

Journal of Magnetism and Magnetic Materials, 310(2, Part1), p.620 - 622, 2007/03

no abstracts in English

Journal Articles

Spin-triplet superconductivity in PrOs$$_4$$Sb$$_{12}$$ probed by muon knight shift

Higemoto, Wataru; Saha, S. R.*; Koda, Akihiro*; Oishi, Kazuki; Kadono, Ryosuke*; Aoki, Yuji*; Sugawara, Hitoshi*; Sato, Hideyuki*

Physical Review B, 75(2), p.020510_1 - 020510_4, 2007/01

 Times Cited Count:32 Percentile:76.2(Materials Science, Multidisciplinary)

We report a muon spin rotation study in single crystalline samples of the heavy fermion superconductor PrOs$$_4$$Sb$$_{12}$$. The muon Knight shift is independent of temperature passing through $$T_c$$ down to 20mK at 3 and 17kOe, indicating that the local spin susceptibility does not decrease in the superconducting state. This result is evidence that spin-triplet superconductivity is realized in PrOs$$_4$$Sb$$_{12}$$.

Journal Articles

Possible unconventional superconductivity and magnetism in CePt$$_3$$Si probed by muon spin rotation and relaxation

Higemoto, Wataru; Haga, Yoshinori; Matsuda, Tatsuma; Onuki, Yoshichika; Oishi, Kazuki; Ito, Takashi; Koda, Akihiro*; Saha, S. R.*; Kadono, Ryosuke*

Journal of the Physical Society of Japan, 75(12), p.124713_1 - 124713_5, 2006/12

 Times Cited Count:12 Percentile:58.31(Physics, Multidisciplinary)

Superconducting and magnetic properties of the heavy fermion superconductor CePt$$_3$$Si were studied by means of the $$mu$$SR method. The muon Knight shift is invariant on passing the temperature through $$T_c$$ down to 20 mK at 17 kOe, indicating that the local spin susceptibility does not change in the superconducting state.

Journal Articles

A New measurement of the astrophysical $$^8$$Li($$alpha$$, n)$$^{11}$$B reaction

Ishiyama, Hironobu*; Hashimoto, Takashi; Ishikawa, Tomoko*; Watanabe, Yutaka*; Das, S. K.*; Miyatake, Hiroari; Mizoi, Yutaka*; Fukuda, Tomokazu*; Tanaka, Masahiko*; Fuchi, Yoshihide*; et al.

Physics Letters B, 640(3), p.82 - 85, 2006/09

 Times Cited Count:32 Percentile:85.01(Astronomy & Astrophysics)

The excitation function of the $$^{8}$$Li($$alpha$$,n)$$^{11}$$B reaction was measured while identifying the final state event by event in the region of E$$_{rm{cm}}$$ = 0.7 - 2.6 MeV using a highly efficient detector system and a low-energy $$^8$$Li beam. The results are much improved both in statistics and precisions, and show smaller cross sections than those of previous measurements by a factor of more than 2 in the low-energy region of E$$_{rm{cm}}le$$ 1.5 MeV. A resonance-like structure is found at around E$$_{rm{cm}}$$ = 0.85 MeV.

Journal Articles

Magnetism and superconductivity in CePt$$_3$$Si probed by muon spin relaxation

Higemoto, Wataru; Haga, Yoshinori; Matsuda, Tatsuma; Onuki, Yoshichika; Koda, Akihiro*; Saha, S. R.*; Oishi, Kazuki; Kadono, Ryosuke*

Journal of the Physical Society of Japan, 75(Suppl.), p.180 - 182, 2006/08

We report on the Magnetism, magnetic penetration depth and the Knight shift in polycrystalline sample of CePt$$_3$$Si by means of muon spin rotation and relaxation method. The appearance of the internal field under the zero magnetic field in whole volume of the specimen, was observed, which indicating clear evidence of antiferromagnetism. The muon Knight shift was measured down to 20mK at 17kOe. Three different frequencies are seen in the muon spin rotation spectra, which depend on the temperature. The symmetry of the superconducting Cooper pair will be discussed.

Journal Articles

A New measurement of the $$^8$$Li($$alpha$$,n)$$^{11}$$B reaction for astrophysical interest

Das, S. K.*; Fukuda, Tomokazu*; Mizoi, Yutaka*; Ishiyama, Hironobu*; Miyatake, Hiroari*; Watanabe, Yutaka*; Hirayama, Yoshikazu*; Tanaka, Masahiko*; Yoshikawa, Nobuharu*; Jeong, S.-C.*; et al.

AIP Conference Proceedings 847, p.374 - 376, 2006/07

no abstracts in English

Journal Articles

Possible magnetic chirality in optically chiral magnet [Cr(CN)$$_6$$][Mn($$S$$)-pnH(H$$_2$$O)](H$$_2$$O) probed by muon spin rotation and relaxation

Oishi, Kazuki; Higemoto, Wataru; Koda, Akihiro*; Saha, S. R.*; Kadono, Ryosuke*; Inoue, Katsuya*; Imai, Hiroyuki*; Higashikawa, Hiroyuki*

Journal of the Physical Society of Japan, 75(6), p.063705_1 - 063705_5, 2006/06

 Times Cited Count:12 Percentile:58.31(Physics, Multidisciplinary)

no abstracts in English

33 (Records 1-20 displayed on this page)