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A lower hybrid current drive system for ITER
Hoang, G.T.,Bé,coulet, A.,Jacquinot, J.,Artaud, J.F.,Bae, Y.S.,Beaumont, B.,Belo, J.H.,Berger-By, G.,Bizarro, Joã,o P.S.,Bonoli, P.,Cho, M.H.,Decker, J.,Delpech, L.,Ekedahl, A.,Garcia, J. International Atomic Energy Agency 2009 Nuclear fusion Vol.49 No.7
<P>A 20 MW/5 GHz lower hybrid current drive (LHCD) system was initially due to be commissioned and used for the second mission of ITER, i.e. the <I>Q</I> = 5 steady state target. Though not part of the currently planned procurement phase, it is now under consideration for an earlier delivery. In this paper, both physics and technology conceptual designs are reviewed. Furthermore, an appropriate work plan is also developed. This work plan for design, R&D, procurement and installation of a 20 MW LHCD system on ITER follows the ITER Scientific and Technical Advisory Committee (STAC) T13-05 task instructions. It gives more details on the various scientific and technical implications of the system, without presuming on any work or procurement sharing amongst the possible ITER partners. This document does not commit the Institutions or Domestic Agencies of the various authors in that respect.</P>
First measurement of T -odd moments in D0→KS0π+π−π0 decays
Prasanth, K.,Libby, J.,Adachi, I.,Aihara, H.,Al Said, S.,Asner, D. M.,Aulchenko, V.,Aushev, T.,Ayad, R.,Babu, V.,Badhrees, I.,Bahinipati, S.,Bakich, A. M.,Bansal, V.,Barberio, E.,Berger, M.,Bhardwaj, American Physical Society 2017 Physical Review D Vol.95 No.9
<P>We report the first measurement of the T-odd moments in the decay D-0 -> K-S(0) pi + pi(-)pi(0) from a data sample corresponding to an integrated luminosity of 966 fb(-1) collected by the Belle experiment at the KEKB asymmetric-energy e(+)e(-) collider. From these moments we determine the CP-violation-sensitive asymmetry a(CP)(T-odd) = [-0.28 +/- 1.38 (stat.)(-0.76)(+0.23) (syst.)] x 10(-3) , which is consistent with no CP violation. In addition, we perform a(CP)(T-odd) measurements in different regions of the D-0 -> K-S(0) pi + pi(-)pi(0) phase space; these are also consistent with no CP violation.</P>
Julius, T.,Sevior, M. E.,Mohanty, G. B.,Adachi, I.,Aihara, H.,Al Said, S.,Asner, D. M.,Aulchenko, V.,Aushev, T.,Ayad, R.,Babu, V.,Badhrees, I.,Bakich, A. M.,Bansal, V.,Barberio, E.,Barrett, M.,Berger, American Physical Society 2017 Physical Review D Vol.96 No.3
<P>We measure the branching fraction and CP violation asymmetry in the decay B-0 -> pi(0)pi(0), using a data sample of 752 x 10(6) B (B) over bar pairs collected at the Y(4S) resonance with the Belle detector at the KEKB e(+)e(-) collider. The obtained branching fraction and direct CP asymmetry are B(B -> pi(0)pi(0)) = [1.31 +/- 0.19(stat) +/- 0.19(syst)] x 10(-6) and A(CP) = +0.14 +/- 0.36(stat) +/- 0.10(syst), respectively. The signal significance, including the systematic uncertainty, is 6.4 standard deviations. We combine these results with Belle's earlier measurements of B-0 -> pi(+)pi(-) and B-+/- -> pi(+/-)pi(0) to exclude the CP-violating parameter phi(2) from the range 15.5 degrees < phi(2) < 75.0 degrees at 95% confidence level.</P>
Search for D0 decays to invisible final states at Belle
Lai, Y.-T.,Wang, M.-Z.,Adachi, I.,Aihara, H.,Al Said, S.,Asner, D. M.,Aushev, T.,Ayad, R.,Badhrees, I.,Bakich, A. M.,Bansal, V.,Barberio, E.,Berger, M.,Bhardwaj, V.,Bhuyan, B.,Biswal, J.,Bobrov, A.,Bo American Physical Society 2017 Physical Review D Vol.95 No.1
<P>We report the result from the first search for D-0 decays to invisible final states. The analysis is performed on a data sample of 924 fb(-1) collected at and near the gamma(4S) and gamma(5S) resonances with the Belle detector at the KEKB asymmetric-energy e(|) e(-) collider. The absolute branching fraction is determined using an inclusive D-0 sample, obtained by fully reconstructing the rest of the particle system including the other charmed particle. No significant signal yield is observed and an upper limit of 9.4 x 10(-5) is set on the branching fraction of D-0 to invisible final states at 90% confidence level.</P>
Hirose, S.,Iijima, T.,Adachi, I.,Adamczyk, K.,Aihara, H.,Al Said, S.,Asner, D. M.,Atmacan, H.,Aushev, T.,Ayad, R.,Aziz, T.,Babu, V.,Badhrees, I.,Bakich, A. M.,Bansal, V.,Berger, M.,Bhardwaj, V.,Bhuyan American Physical Society 2018 Physical Review D Vol.97 No.1
<P>With the full data sample of 772 x 10(6) B (B) over bar pairs recorded by the Belle detector at the KEKB electron-positron collider, the decay (B) over bar -> D+ tau(-)(nu) over bar (tau) is studied with the hadronic tau decays tau(-) -> pi(-)nu(tau) and tau(-) -> rho(-)nu(tau). The tau polarization P-tau(D*) in two-body hadronic tau decays is measured, as well as the ratio of the branching fractions R(D*) = B((B) over bar -> D*tau(-) (nu) over bar (tau))/B((B) over bar -> D*l(-) (nu) over bar (l),where l(-) denotes an electron or a muon. Our results, P-tau (D*) = - 0.38 +/- 0.51(stat)(+0.21)(-0.16) (syst) and R(D*) = 0.270 +/- 0.035(stat)(+0.028)(-0.025)(syst), are consistent with the theoretical predictions of the standard model. The polarization values of P-tau(D*) > +0.5 are excluded at the 90% confidence level.</P>
Berger, B,You, K,Lee, H-C,Mussenbrock, T,Awakowicz, P,Schulze, J IOP PUBLISHING 2018 PLASMA SOURCES SCIENCE AND TECHNOLOGY Vol.27 No.12
<P>The fundamental investigation of different electron heating modes is important in order to fully understand the generation of plasmas, as well as to optimize their technological applications. In this study, a capacitively coupled radio-frequency discharge is operated at its limit of comparably low plasma density. Phase resolved optical emission spectroscopy provides insights into the electron dynamics on a nanosecond time scale under these conditions. At low applied voltage amplitudes, it is observed that more than one electron beam is generated within a single phase of sheath expansion at a given electrode. When the voltage amplitude is increased these beams merge in time to a single electron beam. This effect has been predicted by particle in cell/Monte-Carlo collision simulations before and contradicts existing models that assume the generation of a single beam per sheath expansion phase by stochastic heating (Wilczek <I>et al</I> 2015 <I>Plasma Sources Sci. Technol.</I> <B>24</B> 024002; Wilczek <I>et al</I> 2016 <I>Phys. Plasmas</I> <B>23</B> 063514). In this study, results from a systematic experimental study of the effect are presented, which support the theoretically predicted phenomenon.</P>
Measurement of the decays Λc→Σππ at Belle
Berger, M.,Schwanda, C.,Suzuki, K.,Adachi, I.,Ahn, J. K.,Aihara, H.,Al Said, S.,Asner, D. M.,Atmacan, H.,Aulchenko, V.,Aushev, T.,Ayad, R.,Babu, V.,Badhrees, I.,Bakich, A. M.,Bansal, V.,Behera, P.,Bha American Physical Society 2018 Physical review. D Vol.98 No.11
[Oral Session 3] DISSOLVED AND COLLOIDAL SUBSTANCES RELEASED INTO WATER FROM BLEACHED CHEMICAL PULPS
B.Holmbom,T.Soderlund,W.Berger 한국펄프·종이공학회 1999 한국펄프종이학회 기타 간행물 Vol.- No.-
Dissolved and colloidal substances released from pulps into process waters can accumulate and give detrimental effects on papermaking, especially in paper machine systems with a high degree or water system closure. It has been reported in the literature that beating of chemical pulps in the stock preparation can result in considerable dissolution and dispersion of fibre substances.<br/> Three ECF- and four TCF-bleached pulps delivered in dry form to the Sappi Austria AG fine paper mill in Gratkorn, including both softwood and hardwood pulps, were beaten in a Valley laboratory beater. Refiner beating in the mill was investigated by analysis of samples taken before and after the refiners. The dissolved and colloidal substances in the waters were separated from the fibres by centrifugation and were ana lysed by standard determinations and by GC analysis of carbohydrates and lipophilic extractives (resin).<br/> Considerable amounts of organic material was dissolved and dispersed already during slushing of the pulps. During beating in the Valley beater the concentrations increased further by 6-32%. Beating in the paper mill released little organic material from the pulps. The released dissolved and colloidal substances were mainly composed of hemicelluloses. with xylans as the dominant group. both for hardwood and softwood pulps. More lipophilic extractives were released from birch pulps than from eucalypt and softwood pulps. In mill samples. starch was the dominating dissolved material. Starch is used in the mill both in the wet end and as a coating color component.<br/> It was concluded that the amounts of dissolved and colloidal substances coming in with chemical pulps to the wet end of papermaking are dependent mainly on the cfficiency of pulp washing in the pulp mill. Only some additional fibre material is dissolved or dispersed during beating.