High Energy Accelerator Research Organization

legacy.kek.jp/intra-e/index.html
Tsukuba, Japan
SEARCH FILTERS
Time filter
Source Type

Patent
Shinohara Press Service Co., Nohara and High Energy Accelerator Research Organization | Date: 2017-05-17

[Problem to be Solved] Targeting mass production, the present invention provides an advanced method of manufacturing pure niobium plate end-group components from pure niobium plate material for superconducting high frequency accelerator cavity, wherein the invention is to convert the procedure/production method from the conventional machining or waterjet cutting followed by the conventional cold forging to the whole press-forming. [Solution] A method of manufacturing pure niobium plate end-group components for superconducting high frequency accelerator cavity used for the acceleration of charged particles, composing of(1) shear-blanking procedure of the pure niobium plate different from the conventional fine blanking, wherein the clearance is set to be very small value below 0.5% of pure niobium plate thickness to form a near net shape semi-product free from foreign objects on and below the material surface under the restriction of the material on binding tool to generate counter force, and(2) forging procedure at different temperatures from any of the conventional hot or warm or cold forging, wherein press forging is conducted to be free from the occurrence of blue brittleness/necking and to bring about prominent metal-flow, formability, the size accuracy in any portion of a product and the margin of further press-forming by controlling forging temperature to be below 200C and beyond ambient room temperature,and characterized in thatmanufacturing method such as full machining or waterjet cutting followed by cold forging of the pure niobium plate end-group components is converted to the whole press-forming method.


Patent
Toyota Jidosha Kabushiki Kaisha and High Energy Accelerator Research Organization | Date: 2017-03-28

A system and an apparatus are provided to measure magnetic characteristic of crystal grains composing magnetic polycrystalline materials in the magnetic field or nonmagnetic field by X-ray magnetic circular dichroism (XMCD). In particular, the system and the apparatus measure the magnetic characteristic of comparatively very thick materials.


Patent
Shinohara Press Service Co. and High Energy Accelerator Research Organization | Date: 2016-12-15

Targeting mass production, the present invention provides an advanced method of manufacturing pure niobium plate end-group components from pure niobium plate material for superconducting high frequency accelerator cavity by means of innovative shear-blanking followed by innovative forging procedures, wherein the invention is to convert the procedure/production method from the conventional machining or waterjet cutting followed by the conventional cold forging to the whole press-forming The invention gives the drastic effects on cost-effectiveness and press-performance.


News Article | June 7, 2017
Site: www.nature.com

More than 70 years of particle physics research have led to an elegant and concise theory of particle interactions at the subnuclear level, commonly referred to as the standard model1, 2. On the basis of information extracted from experiments, theorists have combined the theory of electroweak interactions with quantum chromodynamics, the theory of strong interactions, and experiments have validated this theory to an extraordinary degree. Any observation that is proven to be inconsistent with standard model assumptions would suggest a new type of interaction or particle. In the framework of the standard model of particle physics, the fundamental building blocks, quarks and leptons, are each grouped in three generations of two members each. The three generations of charged leptons—the electron (e−), the muon (μ−) and the tau (τ−)—are each paired with an electrically neutral lepton, a very low mass neutrino, ν , ν and ν , respectively. The electron, a critical component of matter, was discovered by Thomson3 in 1897. The discovery of the muon in cosmic rays by Anderson and Neddermeyer4 in 1937 came as a surprise. Similarly surprising was the first observation of τ+τ− pair production by Perl et al.5 at the SPEAR e+e− storage ring in 1975. As far as we know, all leptons are point-like particles, that is, they have no substructure. The three generations are ordered by the mass of the charged lepton, which ranges from 0.511 MeV for e± to 105 MeV for μ± and to 1,777 MeV for τ± (ref. 6). These different masses lead to vastly different lifetimes, from the stable electron to 2.2 μs for muons, and to 0.29 ps for taus. Charged leptons participate in electromagnetic and weak interactions, but not in strong interactions, whereas neutrinos only undergo weak interactions. The standard model assumes that these interactions of the charged and neutral leptons are universal, that is, the same for the three generations. Precision tests of lepton universality have been performed over many years by many experiments. To date no definite violation of lepton universality has been observed. Among the most precise tests is a comparison of the decay rates of K mesons, that is, versus (ref. 7). (Unless stated otherwise, the inclusion of charged-conjugate states and decay modes is implied here and in the following.) Furthermore, taking into account precision measurements of the tau and muon masses and lifetimes and the decay rates and   , the equality of the weak coupling strengths of the tau and muon was confirmed6. On the other hand, a recent determination of the proton (p) radius, derived from very precise measurements of the Lamb shift in muonic hydrogen atoms8, differs by about 4% from measurements of normal hydrogen atoms and e–p scattering data. Studies of the origin of this puzzling difference are underway9. They are aimed at a better understanding of the proton radius and structure, and may reveal details of the true impact of muons and electrons on these interactions. Recent studies have focused on purely leptonic decays of B mesons of the form and semileptonic B decays such as , with ℓ = e, μ or τ, and where D(*) refers to a low-mass charm meson, D or D*. These studies have resulted in observations that seem to challenge lepton universality. These weak decays involving leptons are well understood in the framework of the standard model, and therefore offer a unique opportunity to search for unknown phenomena and processes involving new particles: for instance, a yet undiscovered charged partner of the Higgs boson10. Such searches have been performed on data collected by three different experiments: the LHCb experiment at the pp collider at CERN in Europe, and the BaBar and Belle experiments at e+e− colliders in the USA and in Japan, respectively. Measurements by these three experiments favour larger than expected rates for semileptonic B decays involving τ leptons. Currently, the combined significance of these results is at the level of four standard deviations, and the fact that all three experiments report an unexpected enhancement has drawn considerable attention. A confirmation of this violation of lepton universality and an explanation in terms of new-physics processes would be very exciting. In the following, we present details of the experimental techniques and preliminary studies to understand the observed effects, along with prospects of improved sensitivity and complementary measurements at current and future facilities.


Oishi-Tomiyasu R.,High Energy Accelerator Research Organization
Journal of Applied Crystallography | Year: 2014

A new powder auto-indexing method for the CONOGRAPH software [Oishi-Tomiyasu (2013). Acta Cryst. A69, 603-610] can carry out exhaustive powder auto-indexing in a short time, even if the q values of many peaks are used, with sufficient consideration given to their observational errors. This article explains that the use of many q values is essential to make powder auto-indexing robust against dominant zones and missing or false peaks in the input. Results from CONOGRAPH for 25 real diffraction patterns, including difficult cases, are presented. Owing to a sorting criterion for zones defined in the previous article, the computation times were reduced by a factor of between 18 and 250, and exhaustive powder auto-indexing was completed in 5 min at most. © 2014.


Hashimoto M.,High Energy Accelerator Research Organization
Physical Review D - Particles, Fields, Gravitation and Cosmology | Year: 2010

We reanalyze constraints on the mass spectrum of the chiral fourth generation fermions and the Higgs bosons for the standard model (SM4) and the two Higgs doublet model. We find that the Higgs mass in the SM4 should be larger than roughly the fourth generation up-type quark mass, while the light CP even Higgs mass in the two Higgs doublet model can be smaller. Various mass spectra of the fourth generation fermions and the Higgs bosons are allowed. The phenomenology of the fourth generation models is still rich. © 2010 The American Physical Society.


Patent
High Energy Accelerator Research Organization | Date: 2015-10-21

It is an object of the present invention to provide a method and an apparatus for measuring a scattering intensity distribution capable of measuring a scattering intensity distribution in a reciprocal space in a short time. The method or apparatus for measuring a scattering intensity distribution causes X-rays emitted from an X-ray source (101) to be reflected by an X-ray optical element (102) so as to converge in the vicinity of a surface of a sample (SA), causes monochromatic X-rays condensed after passing through a plurality of optical paths to be incident on the sample at glancing angles () that differ depending on the respective optical paths at a time in a state in which there is a correlation between an angle formed by each optical path of the monochromatic X-rays and a reference plane, and an angle formed by each optical path and a plane including the normal of the reference plane and an optical path located in the center of the respective optical paths, detects scattering intensities of the monochromatic X-rays scattered by the sample using a two-dimensional detector (103) and calculates a scattering intensity distribution in the reciprocal space based on the scattering intensity distribution detected by the two-dimensional detector and the correlation.


Patent
High Energy Accelerator Research Organization | Date: 2015-06-26

A method for synthesizing a radioactive technetium-99m-containing substance and a synthesizing device are provided. The method for synthesizing a radioactive technetium-99m-containing substance has a step for generating negative muons and a step for irradiating the negative muons onto a ruthenium sample. The ruthenium material preferably includes a metallic ruthenium and/or a ruthenium compound. Also, the ruthenium sample preferably has a plurality of superimposed ruthenium thin plates having a thickness of 4 mm or less.


Patent
High Energy Accelerator Research Organization | Date: 2016-04-13

[Problem to be Solved] The present invention provides a radio wave measurement device enabling highly sensitive measurements of radio waves at an extremely low temperature. [Solution] The radio wave measurement device has a radiation-blocking filter through which a targeted radio wave is transmitted, a radio wave-transparent material to reflect a non-targeted electromagnetic wave included in radio waves, and a radio wave detector which are placed in a vacuum vessel, in which the radio waves are transmitted through the radiation-blocking filter, the non-targeted electromagnetic wave included in the radio waves is reflected toward the radiation-blocking filter by the radio wave-transparent material and collected as heat into the radiation-blocking filter, and the heat is exhausted out of the system, allowing the radio waves transmitted through the radio wave-transparent material to be measured with high sensitivity by the radio wave detector.


Patent
Toyota Motor Corporation and High Energy Accelerator Research Organization | Date: 2015-04-01

The object of the present invention is to provide a method, system and apparatus that are capable of measuring magnetic characteristic of crystal grains composing magnetic polycrystalline materials in the magnetic field or nonmagnetic field by X-ray magnetic circular dichroism. In particular, the present invention is capable of measuring the magnetic characteristic of comparatively very thick materials having a thickness in the range from 50 to 1000 nm and prepared by fabricating microtome sections using focused ion beam etching.

Loading High Energy Accelerator Research Organization collaborators
Loading High Energy Accelerator Research Organization collaborators