LHD Research Forum

Contribution List

11. Opening

6/30/25, 10:50 AM

#1

Hiroshi Yamada (Director General)

Motoshi Goto (LHD Experiment Design Task Group Leader)

10. 2872 Akinobu Matsuyama

6/30/25, 11:00 AM

#1

Spatiotemporal structure of disturbance triggered by pure, doped, and massive hydrogen pellet injection [SG1]

12. 3041 Caoxiang Zhu

6/30/25, 11:10 AM

#1

Optimized Configurations with Enhanced Confinement in LHD [SG1]

13. 2904 Hideo Nuga

6/30/25, 11:20 AM

#1

Experimental measurement of bootstrap current [SG1]

14. 3022, 3023 Kiyomasa WATANABE

6/30/25, 11:30 AM

#1

Core MHD instability suppression by RMP field [SG1]

Study on suppression conditions of resistive interchange instability without pressure gradient degradation by external RMP [SG1]

15. 2928 Nengchao Wang

6/30/25, 11:45 AM

#1

Investigation and control of the magnetic island related e-ITB collapses [SG1]

16. 3030 Seungho Lee

6/30/25, 11:55 AM

#1

Study of mode coupling and non-resonant effects in RMP response [SG1]

27. 3001 Christopher Anthony Orrico

6/30/25, 12:05 PM

#1

Model predictive density profile control with pellet fueling [SG3]

17. 2876, 2877 Tomoko Kawate

6/30/25, 1:00 PM

#2

Wolter x-ray optical system to measure high temperature plasmas [SG1]

Z Dependence of Temporal Evolution of Emission Spectra in Impurity Pellet Injection [SG6]

18. 2937, 2939 Kazuo Toi

6/30/25, 1:15 PM

#2

Excitation of stable Alfven eigenmodes by ice pellet injection in finite-beta plasmas heated by electron cyclotron waves and the destabilization by energetic ions [SG1]

Studies of intermittent ion temperature increases observed in reversed magnetic shear plasmas with counter neutral beam injection on LHD [SG2]

19. 2869, 2870, 2871 Naoki Kenmochi

6/30/25, 1:30 PM

#2

Investigation of the mechanism of intermittent transport phenomena during the formation of electron internal transport barriers [SG1]

Investigation of local and non-local turbulence during thermal pulse propagation by MECH injection [SG2]

Investigation of local and non-local turbulence during cold pulse propagation by TESPEL injection [SG2]

20. 2987, 2998 Toshiki Kinoshita

6/30/25, 1:50 PM

#2

Investigation of periodic instabilities preceding radiation collapse under perpendicular NBI [SG1]

Real-time suppression of turbulence for sustaining high-performance plasmas and investigation of collapse mechanisms [SG2]

21. 3031 Shinsuke Satake

6/30/25, 2:20 PM

#3

V&V of Multi-purpose optimized configuration in LHD [SG1]

22. 3018, 3020 Shogo SHIMODE

6/30/25, 2:30 PM

#3

Collisionality dependence study of the external RMP penetration threshold [SG1]

Study of the mechanism on shielding external RMP by plasmas [SG1]

23. 3000, 3002, 3003, 3004 Yuki Takemura

6/30/25, 2:45 PM

#3

Sawtooth Oscillation Excitation Conditions [SG1]

CDC Stabilization Conditions [SG1]

Driving Mechanism of Pellet-Triggered m/n = 2/1 Magnetic Islands [SG1]

Triggering and Frequency Mechanisms of Edge Instabilities [SG1]

24. 2959, 2960 Yuya Suzuki

6/30/25, 3:10 PM

#3

Prediction and control of radiative collapse using a camera and a deep-learning method [SG1]

Prediction and control of radiative collapse using a decision model [SG1]

25. 2929, 2916 Jialei Wang

6/30/25, 3:40 PM

#4

Fast-ion phase space engineering by RF waves to actively control bursting SAWs [SG1]

Validation of p-11B fusion reactivity using MeV ICRF tail ions in LHD [SG4]

26. 3045, 3026, 3033 Hiroe Igami

6/30/25, 3:55 PM

#4

Observation of large bursting emissions during He beam injection [SG1]

Observation of electron cyclotron maser instability during the fundamental X-mode ECCD in the extremely low dense plasma [SG3]

Effect of the orbit of high energy ions on the frequencies of coherent ion cyclotron and lower hybrid harmonic emissions [SG4]

28. 3057, 3055 Dmitry Moseev

6/30/25, 4:50 PM

#5

Exploration of thermal ICE in H and He [SG1]

Fast-ion stabilization of ETG [SG4]

29. 2914, 2915 Alexander Knieps

6/30/25, 5:05 PM

#5

Intrinsic threshold for detachment in outward-shifted configuration (3.9m) [SG1]

Active control of detachment with SSGP injection at threshold density [SG2]

30. 2997 Hjördis Bouvain

6/30/25, 5:20 PM

#5

Mitigation of tungsten induced plasma termination and identification of transient transport mechanisms [SG1]

31. 2941 Ksenia Aleynikova

6/30/25, 5:30 PM

#5

KBM Onset in LHD: Resistivity, Magnetic Shear, and Well Dependencies [SG1]

32. 3007 Neha Chaudhary

6/30/25, 5:40 PM

#5

Investigation of Shafranov shift for high beta configurations using a new method exploiting radially localized ECE measurements [SG1]

33. 2931 Daniel Den Hartog

7/1/25, 9:00 AM

#6

Measurement of Plasma Dynamics during Core Density Collapse (CDC) in LHD [SG1]

34. 2889 Kenneth Hammond

7/1/25, 9:10 AM

#6

Pellet injection into plasmas with stepped up heating power [SG1]

35. 2911, 2912, 2930 Federico Nespoli

7/1/25, 9:20 AM

#6

Joint Experiment on Effect of Impurities on Stellarator
Performance [SG2]

Effect of low-Z powder injection on density limit [SG5]

Siliconization via powder injection [SG5]

36. 3051, 3024 Novimir Pablant

7/1/25, 9:40 AM

#6

Trial of high-Z metal impurity pumpout by ICRF three-ion heating [SG2]

Tungsten spectroscopy to support atomic physics at fusion reactor relevant temperatures [SG6]

37. 2878, 2881 Hisamichi Funaba

7/1/25, 9:55 AM

#6

Partial pressure measurement of neutral gases by the Penning gauge spectroscopy [SG6]

Diagnostics of relativistic electrons by Thomson scattering in high electron temperature plasmas [SG2]

38. 2909 shinji kobayashi

7/1/25, 10:25 AM

#7

Stochastic acceleration using non-resonant microwave heating [SG4]

39. 3052, 3053 Masaki Nishiura

7/1/25, 10:35 AM

#7

Study on core density peaking and flattening in plasmas [SG4]

Causality of potential and temperature responses on local electron heating [SG2]

40. 2896, 2897 Katsumi Ida

7/1/25, 10:50 AM

#7

Impact of density gradient on turbulence anisotropy [SG2]

Deformation of ion velocity distribution and anisotropy of turbulence triggered by EP-driven MHD burst. [SG4]

41. 2943, 2944 Hikona Sakai

7/1/25, 11:05 AM

#7

Advanced turbulence control for achieving high-pressure plasma [SG2]

Investigation of direct interaction between fast-ion and turbulence [SG4]

42. 2954, 2961, 2990 Kenji Tanaka

7/1/25, 11:30 AM

#8

Investigation of density limit and improved confinement regime in high density regime [SG2]

Investigation of transport of pellet injected plasma of LHD and W7-X [SG2]

Experiments for the gyrokinetic validation of particle transport [SG2]

43. 2979 Mikirou Yoshinuma

7/1/25, 11:50 AM

#8

Development fast charge exchange spectroscopy using OCAM2K [SG2]

44. 3014, 2906, 2947 Ryohtaroh Ishikawa

7/1/25, 1:00 PM

#9

Geodesic curvature dependence of anomalous transport [SG2]

Cyclic occurrence of thermal instability [SG6]

Detachment/reattachment cycles [SG5]

45. 2949, 2946, 3035 Gen Motojima

7/1/25, 1:20 PM

#9

Density limit relation to edge turbulence [SG2]

Neutral particle compression/pumping and detachment on high beta plasmas [SG5]

Investigation of Neutral Pressure Scaling with Density and Heating Power in LHD Divertor Plasmas [SG5]

46. 3013 Tetsutarou Oishi

7/1/25, 1:40 PM

#9

Effect of boron impurity powder injection on tungsten impurity transport in the LHD core plasma [SG2]

47. 3021 Mingzheng Gong

7/1/25, 1:50 PM

#9

Investigate turbulent heat transport inside density peaking and flattening plasmas [SG2]

48. 2932 Ichihiro YAMADA

7/1/25, 2:00 PM

#9

Experimental study of electron temperature anisotropy and non-Maxwellian distribution of electrons by using the LHD Thomson scattering system [SG2]

49. 2913 Kazunobu Nagasaki

7/1/25, 2:25 PM

#10

Formation of electron ITB in NBI plasmas by fuelling control [SG2]

50. 2986, 3005 Shigeru Inagaki

7/1/25, 2:35 PM

#10

Non-Local Transport ~ Revisit ~ [SG2]

Collisionality-Dependent Turbulence Structure Formation in High-Density Plasmas [SG2]

52. 2882 Fumiyoshi Kin

7/1/25, 2:50 PM

#10

Investigation of ion heat transport in ITG-dominant Ti-ITB plasmas [SG2]

51. 2980 Tatsuhiro Nasu

7/1/25, 3:00 PM

#10

Investigation of high-k turbulence dependence on collision frequency [SG2]

53. 3029 Takeshi Ido

7/1/25, 3:10 PM

#10

Influence of energetic particles on the formation of the electric potential profiles and impurity transport [SG2]

54. 2992, 2993 Daiki Nishimura

7/1/25, 3:20 PM

#10

Geodesic curvature dependence of GAM characteristics [SG2]

Investigation of cross-scale coupling between Alfven eigenmode and turbulence [SG2]

55. 2942, 2945 Tatsuya Kobayashi

7/1/25, 3:50 PM

#11

Phase-space tomography experiment for MHD burst event [SG2]

Heat pulse propagation in magnetic island [SG2]

56. 2890, 2891 Yuichi Kawachi

7/1/25, 4:05 PM

#11

Investigation of interaction between broadband phase space dynamics and wide frequency range of fluctuations during the energetic particle induced MHD burst event [SG2]

Direct observation of bulk phase space dynamics during the
energetic particle driven Geodesic Acoustic Mode [SG2]

57. 3015 Tokihiko Tokuzawa

7/1/25, 4:20 PM

#11

Multi-scale turbulence response in spontaneous phenomena [SG2]

58. 3050 Lennard Ceelen

7/1/25, 4:45 PM

#12

Nonlinear Dynamic Validation of Heat Transport Models in Fusion Plasmas through Advanced Perturbative Heating Experiments [SG2]

59. 2948, 2950 Branka Vanovac

7/1/25, 4:55 PM

#12

Turbulence nT cross-phase study [SG2]

TEM physics studies [SG2]

60. 3008, 3009 Daniel Carralero

7/1/25, 5:10 PM

#12

Turbulence suppression by density gradient: a comparison to W7-X [SG2]

Reproduction of W7-X low density high performance scenario in LHD [SG2]

61. 2933, 2951 Daniel Medina Roque

7/1/25, 5:25 PM

#12

Study of the impact of small amounts of powder injection on impurity confinement and transport [SG2]

Study of the impact of different kinds of powder injection on impurity confinement and transport [SG2]

62. 2883 Yunfeng Liang

7/1/25, 5:40 PM

#12

Scenarios of Hot Ion Mode and Impact of Boron Concentration [SG2]

63. 2995 Juan Gallego

7/1/25, 5:50 PM

#12

Study of plasma density limit by density ramp-up discharges [SG2]

64. 3062, 3061 Michael Zarnstorff

7/2/25, 9:00 AM

#13

First measurements of aneutronic p-Li fusion reactions in a magnetically confined plasma [SG4]

Assessment of a Baffled Non-Resonant Divertor in LHD [SG5]

65. 2899 Shuji Kamio

7/2/25, 9:15 AM

#13

Study of the fast-ion acceleration by ICRF heating for p-11B fusion reaction [SG4]

66. 2917 Wataru Hayashi

7/2/25, 9:25 AM

#13

Diagnosis of fast ion transport under the effects of the radial electric field [SG4]

67. 2898 Yutaka Fujiwara

7/2/25, 9:35 AM

#13

Experimental investigation targeting maximum alpha particle emission rate in p-11B fusion reactions [SG4]

68. 2963, 2964, 3028 Jacobo Varela Rodríguez

7/2/25, 9:45 AM

#13

Improved heating scenarios by enhancing ICRH + NBI coupling [SG4]

Techniques to avoid or minimize core dense collapse events [SG1]

Systematic characteristics of mode structure of resistive interchange instability [SG1]

69. 3010 Bing Liu

7/2/25, 10:20 AM

#14

Characterization of p-11B reaction near 163keV and 675keV resonances via α0, α1, γ branching ratios in LHD [SG4]

70. 2908, 2952 Masato Matsuoka

7/2/25, 10:30 AM

#14

Phase-space transport of fast ions interacting with Alfven waves [SG4]

Interaction between fast ions and MHD bursts with n=0 [SG4]

71. 3036 Seongbin Hong

7/2/25, 10:45 AM

#14

Effect of Hydrogen-Helium Ion Composition on Sub-Alfvénic ICE via Precise Control of V_beam/V_A [SG4]

72. 2925 Shinji Wakisaka

7/2/25, 11:10 AM

#15

Observation of gamma-rays emitted by 6Li-hydrogen isotopes reactions for fast ion diagnostics [SG4]

73. 2956 Kenichi Nagaoka

7/2/25, 11:20 AM

#15

Demonstration of external control of energetic ion confinement with AEs and EP measurement [SG4]

74. 3049 Kenji Ueda

7/2/25, 11:30 AM

#15

Inspection of fast-ion profiles with parallel and perpendicular neutral beams by CTS [SG4]

75. 3047 Won-Ha Ko

7/2/25, 1:00 PM

#16

The study of ion transport in LHD with high density for ITER operation [SG2]

76. 2885, 2996 Eiichirou Kawamori

7/2/25, 1:10 PM

#16

Diagnosis of electron entropy distribution in phase space of electron-scale turbulence via electron cyclotron emission spectra I, Verification experiment of reconstruction of electron velocity distribution function from ECE spectrum [SG2]

Diagnosis of electron entropy distribution in phase space of electron-scale turbulence via electron cyclotron emission spectra II, Turbulence experiment [SG2]

77. 2983, 2984 Yuya Morishita

7/2/25, 1:25 PM

#16

Remote Control of LHD Plasma Using the New Plasma Simulator [SG2]

Digital Twin-Based Advanced Control of LHD Plasma by ASTI [SG2]

78. 3027 Sadayoshi Murakami

7/2/25, 1:40 PM

#16

Demonstration of plasma parameter optimization by the data assimilation control system ASTI with plasma navigation [SG2]

79. 3040 Haifeng LIU

7/2/25, 1:50 PM

#16

Comparative study of neoclassical transport in LHD and CFQS [SG2]

80. 2975, 2976, 2981, 2935 Ryoma Yanai

7/2/25, 2:15 PM

#17

Study of electron temperature fluctuation behaviour in e-ITB plasmas [SG2]

Comparison of turbulence characteristics in different EVDF conditions [SG2]

Turbulence characteristics in density-peaking plasma in LHD [SG2]

Confirmation of ECH alignment [SG3]

81. 2927 Kizuku Ogihara

7/2/25, 2:40 PM

#17

Density profile control by off-axis ECH in high density plasmas [SG3]

82. 2936 Naoto Tsujii

7/2/25, 2:50 PM

#17

Optimization of ICRF heating scenarios to control energetic ion distribution function in phase space [SG3]

83. 3019 Nozomu Shirokoshi

7/2/25, 3:00 PM

#17

Comparative Study and Validation of ECH Ray-Tracing Code Models [SG3]

84. 2921, 2922, 2994 Ryosuke SEKI

7/2/25, 3:10 PM

#17

Commissioning of ICRF experiment [SG3]

Heating efficiency and fast ion tail formation of ICRF second proton heating [SG3]

Dependence of resonance layer shape and antenna on heating efficiency of minority ion heating [SG3]

85. 2854 Shin Kubo

7/2/25, 3:45 PM

#18

Characteristics of millimeter wave vortex on heating, current drive, and propagation in high-density plasmas [SG3]

86. 2894 Worathat Paenthong

7/2/25, 3:55 PM

#18

Investigation of Changes in Helically-Trapped Energetic-Particle Distribution Induced by Energetic-Ion-Driven Resistive Interchange Mode Using an Imaging Neutral Particle Analyzer in the Large Helical Device [SG4]

87. 2991 Vaishnavi Murugesan

7/2/25, 4:05 PM

#18

ECRH Power deposition studies using calibrated ECE at LHD [SG3]

88. 2874, 2875 Yurii Kovtun

7/2/25, 4:15 PM

#18

ICRF plasma production and heating in the hydrogen minority regime [SG3]

Scenarios of plasma start-up at second harmonic ICRF [SG3]

89. 3011 Marcin Jakubowski

7/2/25, 4:30 PM

#18

Development of steady-state detachment scenarios at LHD [SG2]

90. 2938 Tomasz Fornal

7/2/25, 4:40 PM

#18

Investigation of tungsten (W) and gold (Au) behavior injected via the TESPEL system into the NBI-heated hydrogen LHD plasma: effects on plasma density and temperature observed by VUV spectroscopy [SG2]

91. 2953 Łukasz Syrocki

7/2/25, 4:50 PM

#18

Effect of the quantity of tungsten (W) and gold (Au) injected by the TESPEL system into the ECRH-heated hydrogen LHD plasma on VUV spectra under different LHD plasma conditions [SG2]

92. 2966, 2967, 2968, 2969, 2970, 2971, 2972 Naoki Tamura

7/2/25, 5:15 PM

#19

Impurity effect on turbulent transport in magnetically-confined toroidal plasmas [SG2]

Assessment of geometrical effect on transport through quadrupole field scan [SG2]

Confinement and transport studies in helium plasmas [SG2]

Reference discharges in every magnetic configuration through the last LHD experiment campaign [SG2]

Optimization of a pellet fueling by combining various...

93. 2965 Alessandro Bortolon

7/3/25, 9:00 AM

#20

Effect of low-Z powders on tungsten transport [SG5]

94. 2918 Robert Lunsford

7/3/25, 9:10 AM

#20

Conclusion of lithium granule injection series for plasma modification and supplemental wall conditioning [SG5]

95. 3034 Shota Abe

7/3/25, 9:20 AM

#20

Diamond and diamond-like carbon as advanced divertor plasma-facing components [SG5]

96. 2868 Masahiro Kobayashi

7/3/25, 9:30 AM

#20

Optimization of impurity radiation with edge magnetic structure, heating scheme, and impurity species [SG5]

97. 3039, 3043, 3044 Kiyofumi Mukai

7/3/25, 10:00 AM

#21

Anomaly detection of radiation profile in radiative collapse [SG5]

Control of impurity seeding using ECE signal for divertor detachment [SG5]

Relation between toroidal asymmetry of divertor detachment and radiation localization [SG5]

98. 2900, 2901, 2902 Mamoru Shoji

7/3/25, 10:20 AM

#21

The sustainment of divertor detachment by impurity dust particle injection into the magnetic island in the LHD peripheral plasma using the IPD [SG5]

The evaluation of the toroidal uniformity of the boron deposition on the divertor plates for effective real-time boronization using the impurity powder dropper (a low plasma density condition) [SG5]

The evaluation of the toroidal uniformity...

99. 2962 Hiroki Natsume

7/3/25, 10:40 AM

#21

BRDF Measurement of Boron-Coated Tungsten for Accurate Optical Diagnostics [SG5]

100. 3016 Mingzhong Zhao

7/3/25, 11:10 AM

#22

Effect of pre-damage on hydrogen/helium mixed plasma induced tungsten surface modifications at divertor [SG5]

101. 3038, 3046, 3048, 3060 Suguru MASUZAKI

7/3/25, 11:20 AM

#22

Investigation of the effects of impurity powder dropping on the transport of the first wall material in LHD [SG5]

Sustainment of divertor detachment by using feedback control impurity seeding [SG5]

Effects of boronizatoin on plasma facing surface [SG5]

Super-long pulse discharge with integrated operation - IPD, impurity seeding, RMP - [SG5]

102. 3037 Yukinori Hamaji

7/3/25, 11:45 AM

#22

Liquid metal divertor experiment [SG5]

103. 2985 Arseniy Kuzmin

7/3/25, 1:00 PM

#23

Spatial Behavior of BH Rotational Temperatures and Surface Processes in Boron-Conditioned Plasmas [SG6]

104. 2920 Chihiro Suzuki

7/3/25, 1:10 PM

#23

Experimental identification of spectral lines from highly charged heavy ions [SG6]

105. 2940 Daiji Kato

7/3/25, 1:20 PM

#23

Heavy element atomic data toward decoding infrared spectra of neutron star mergers [SG6]

106. 2604 Fumihiro Koike

7/3/25, 1:30 PM

#23

Study of trans atomic number systematics of EUV spectra of heavy-atomic multiply-charged ions [SG6]

107. 3032 Hirohisa Hara

7/3/25, 1:40 PM

#23

Validation of EUV spectroscopic diagnostic method for solar high-temperature plasma by utilizing the LHD experimental dataset [SG6]

108. 2892 Hiroyuki Takahashi

7/3/25, 1:50 PM

#23

Establishing a diagnostic technique for concentration of impurity nitrogen ion using collisional-radiative analysis combined with divertor spectroscopy [SG6]

109. 3017 Izumi Murakami

7/3/25, 2:15 PM

#24

Simultaneous multi-wavelength spectroscopies for validation on atomic data and spectroscopic modeling for highly charged ions [SG6]

110. 3006 Kunpei Nojiri

7/3/25, 2:25 PM

#24

Survey of boron spectral lines and its application to ITER divertor plasma diagnostics [SG6]

111. 3058, 3059 Motoshi Goto

7/3/25, 2:35 PM

#24

Doppler free spectroscopy for the neutral penetration profile measurement [SG6]

Tomographic analysis of helium atom emission line intensity [SG6]

112. 3012 Ryota Nishimura

7/3/25, 2:50 PM

#24

Exploration of line emissions from tungsten ions in low charge states and the application to the study of impurity transport in the edge plasmas [SG6]

113. 2982 Taiichi Shikama

7/3/25, 3:00 PM

#24

Polarization imaging of Ar XIV and H_alpha emission lines for diagnosing anisotropic electron velocity distributions [SG6]

114. 3042 Edgardo Villalobos Granados

7/3/25, 4:00 PM

#25

Spectroscopic characterization of pellet ablation for investigating plasmoid dynamics in stellarators [SG6]

115. 2989 Ivan Traparic

7/3/25, 4:10 PM

#25

Investigation of tungsten impurity confinement time in presence of additional ECH heating with spatially resolved EUV spectroscopy [SG6]

116. 3054 Nerea Panadero

7/3/25, 4:20 PM

#25

Effect of magnetic configuration on pellet fuelling efficiency [SG6]

117. 2910 Chandra Prakash Dhard

7/3/25, 4:50 PM

#26

Exposure of material samples into the LHD edge plasma by means of the manipulator [SG5]

118. 2884 Erhui Wang

7/3/25, 5:00 PM

#26

Investigation of edge impurity transport in detached high-beta plasma with inward-shifted configuration [SG5]

119. 2957 Masato Kobayashi

7/3/25, 5:10 PM

#26

Hysteresis conditions in thermal instability with various impurities, densities, and magnetic islands, and their universality across fusion plasma and astrophysical plasma [SG5]

120. 2973, 2974 Uwe Wenzel

7/3/25, 5:20 PM

#26

Search of the trigger of the ultra-high divertor pressure regime [SG5]

Dependence of the ultra-high pressure regime on the field configuration [SG5]

121. Closing

7/3/25, 5:35 PM

#26

2. 2872

4. 2904

7. 2928

5. 3022

6. 3023

8. 3030

3. 3041

1. Opening

9. Opening

Back to the event