JOPSS - Search Results

Journal Articles

Development of silicon strip detector for the measurement of the -atom X-rays

Sugimura, Hitoshi; Imai, Kenichi; Sako, Hiroyuki; Sato, Susumu; Adachi, Satoshi*; Tanida, Kiyoshi*; Kiuchi, Ryuta*; Joo, C. W.*

AIP Conference Proceedings 1388, p.602 - 604, 2011/10

https://doi.org/10.1063/1.3647465

Times Cited Count：0 Percentile：0.05(Astronomy & Astrophysics)

no abstracts in English

Journal Articles

Status of beam loss evaluation at J-PARC linac

Miura, Akihiko; Sako, Hiroyuki; Yamamoto, Kazami; Kikuzawa, Nobuhiro; Maruta, Tomofumi; Sato, Susumu; Imai, Kenichi; Adachi, Satoshi; Sugimura, Hitoshi; Igarashi, Zenei*; et al.

Proceedings of 25th International Linear Accelerator Conference (LINAC 2010) (CD-ROM), p.590 - 592, 2010/09

http://accelconf.web.cern.ch/AccelConf/LINAC2010/papers/tup076.pdf

Ar-CO $_{2}$ gas proportional counters are employed for the measurement of beam loss in the current linac operation, but they are also sensitive to background noise of X-ray emitted from RF cavities. In SDTL section, protons, secondary hadrons and rays would be mainly generated as a beam loss, but it is not easy to estimate real beam loss using the proportional counter. The plastic scintillation counters with less X-ray sensitivity and $^{3}$ He proportional counters with high thermal neutron sensitivity will be also employed to measure the beam loss. This paper reports the signals obtained during the beam operation using the Ar-CO $_{2}$ gas proportional counter and the plastic scintillation counter. Finally, a measurement of emission position and angle distributions of protons due to negative hydrogen ion (H $^{-}$ ) beam loss is being planed. This plan is introduced and this result would lead to clarify the source of beam loss.

Journal Articles

Current status of the control system for J-PARC accelerator complex

Yoshikawa, Hiroshi; Sakaki, Hironao; Sako, Hiroyuki; Takahashi, Hiroki; Shen, G.; Kato, Yuko; Ito, Yuichi; Ikeda, Hiroshi*; Ishiyama, Tatsuya*; Tsuchiya, Hitoshi*; et al.

Proceedings of International Conference on Accelerator and Large Experimental Physics Control Systems (ICALEPCS '07) (CD-ROM), p.62 - 64, 2007/10

J-PARC is a large scale facility of the proton accelerators for the multi-purpose of scientific researches in Japan. This facility consists of three accelerators and three experimental stations. Now, J-PARC is under construction, and LINAC is operated for one year, 3GeV synchrotron has just started the commissioning in this October the 1st. The completion of this facility will be next summer. The control system of accelerators established fundamental performance for the initial commissioning. The most important requirement to the control system of this facility is to minimize the activation of accelerator devices. In this paper, we show that the performances of each layer of this control system have been achieved in the initial stage.

Journal Articles

study of hydrogen hydrate clathrates for hydrogen storage within the ITBL environment

Sluiter, M. H. F.*; Belosludov, R. V.*; Jain, A.*; Belosludov, V. R.*; Adachi, Hitoshi*; Kawazoe, Yoshiyuki*; Higuchi, Kenji; Otani, Takayuki

Lecture Notes in Computer Science 2858, p.330 - 341, 2003/00

Recently, for the first time a hydrate clathrate was discovered with hydrogen. Aside from the great technological promise that is inherent in storing hydorogen at high density at modest pressures, there is great scientefic interest as this would constitute the first hydrate clathrate with multiple guest molecules per cage. The multiple cage occupancy is controversial, and reproducibility of the experiments has been questioned. Therefore in this study we try to illucidate the remarkable stability of the hydrogen hydrate clathrate, and determine the thermodynamically most favored cage occpancy using highly accrate computer simulations in a parameter survey. To carry out these extraordinary demanding computations a distributed code has been developed using the SuperSINET with the ITBL software as the top-layer.

Journal Articles

Development of optical devices based on neutron refractive optics

Oku, Takayuki*; *; *; Yamagata, Yutaka*; Omori, Hitoshi*; Adachi, Tomohiro*; Shimizu, Hirohiko*; *; Hirota, T.*; Iwasa, Hirokatsu*; et al.

JAERI-Conf 2001-002, p.537 - 541, 2001/03

https://jopss.jaea.go.jp/pdfdata/JAERI-Conf-2001-002-Part1.pdf

no abstracts in English

Oral presentation

Development of tracking detector around the J-PARC experimental target

Sato, Susumu; Sako, Hiroyuki; Imai, Kenichi; Sugimura, Hitoshi; Adachi, Satoshi; Niiyama, Masayuki; Ozawa, Kyoichiro

no journal, ,

In the experimental study of hadron properties at J-PARC, especially for the study of hyperon (including production and decay properties), it is essential to measure decayed particles around the experimental target with larger solid angle. In this report, status of development of the 3-dimensional tracking detector is presented.

Oral presentation

Development of taraget-containing-type of TPC-4-spectrometer

Sato, Susumu; Sako, Hiroyuki; Imai, Kenichi; Sugimura, Hitoshi; Adachi, Satoshi; Kiuchi, Ryuta*; Tanida, Kiyoshi*; Miwa, Koji*; Ozawa, Kyoichiro*

no journal, ,

no abstracts in English

Oral presentation

Beam loss measurements with scintillation fibers at the J-PARC linac

Sako, Hiroyuki; Kikuzawa, Nobuhiro; Miura, Akihiko; Maruta, Tomofumi; Adachi, Satoshi; Imai, Kenichi; Sato, Susumu; Sugimura, Hitoshi

no journal, ,

At Annular Coupled Structure linac (ACS) in J-PARC linac, high residual radiation due to beam loss has been observed. Since the beam loss is approximately proportional to the residual gas pressure, the observed beam loss may be caused by the H $^{0}$ 's which are generated by the electron stripping by the residual gas. We are going to evaluate beam loss by counting H $^{+}$ 's emitted outside the beam duct. We have developed hodoscopes with the sensitive area of 64 mm 64 mm, which consists of 16 fibers of 4 mm 4 mm 64 mm. Scintillation photons are measured by the multi-anode photo-multipliers. We report beam loss measurements by the hodoscopes.