25th 4th week(04/01/24 - 04/05/24) schedule for LHD experiment
Date

Weekly report :Schedule of the day

Day Btof dire
the ctioweek nMorning (～ 12:15)

Afternoon (12:15 ～ 16:45)

WallGasExperiment implementation system

Remark

Sat:He GD

4/ M
1 o.

Sun:
None
Mon:
None
[TC](10:30 ～ 16:45)ECH, NBI
turbulence in modulated ECH, Turbulence characteristics in density-peaking plasma, Comparison of turbulence driven transport between LHD and W7-X
# Opt. Pol.
1CW

Rax
3.6

Bax
2.75

gamma
1.2538Bq
100.0SC

None

4/ Tu C
2. W

DivCryo[TC](10:30 ～ 14:30)ECH, NBI
Investigation of turbulence and heat propagation characteristics during e-ITB
formation transition and back transition

4/ W C
3 e. W

4/ Th CC
4. W

# Opt. Pol.
1CW

Rax
3.6

Bax
2.75

gamma
1.2538Bq
100.0[MAP](14:30 ～ 16:45)ECH, NBI
Impurity confinement and transport dependence on electron temperature gradient
SCRax
3.6

Bax
2.75

gamma
1.2538Bq
100.0[IA](10:30 ～ 14:15)ECH, NBI[TC](14:45 ～ 16:45)ECH, NBI
Study on disturbance by injection of high Z(neon)-doped hydrogen pellets, Study on Assessment of geometrical effect on transport through quadrupole field scanstabilization mechanism of MHD instability# Opt. Pol.
Rax
Baxgamma
Bq
SC# Opt. Pol.
Rax
Baxgamma
Bq
1
CCW
3.6
1.375
1.2538
200.0
1
CCW
3.6
2.75
1.2538100.0
2 ✓ CCW
3.6
1.375
1.1739
100.0
2
CCW
3.75
0.75
1.2538
100.0
3CCW
3.75
0.6
1.2538100.0
4 ✓ CCW
3.775
0.6
1.2538100.05 ✓ CCW
3.775
0.75
1.2538100.06 ✓ CCW
3.650.6
1.2538100.0[IA](10:30 ～ 12:30)ECH, NBI, ICH
Experimental study on Alfvén eigenmode

4/ Fr C
5. W

# Opt. Pol.
1CWSC

None

# Opt. Pol.
1CW
2CW

Rax
3.6
3.6

Bax
0.8
1.375

H2,Ar

H2,Ar

SC

None

H2

Bq
100.0
100.0

SC

# Opt. Pol.
1CW

Rax
3.6

Bax
2.75

gamma
1.2538(TC)FTS, fast CXS,
【Responsible person】S.Sakakibara / BS(position scan), HIBP,
H.Hayashi
MSE【Coordinator#1】M.shohji/A.Shimizu【Coordinator#2】M.Kobayashi/T.kobay (MAP)HIBP, TESPEL, CXS,ashi
Doppler Reflectometer, PCI,
【ECH】H.Takahashi
SOXMOS【Gas・vacuum・shutter】A/B【Low temp.】ohba.kouki(id:723) Impurity【LID power】M.Kawai/K.Nagaharapellet/TESPEL【Coil power】takami.shigeyuki(id:724) Impurity gas puff
【central ctrl.】ogawa.hideki(id:750) ECH: Focusing【data proc.】M.Ohsuna
point scan : Subcool【EXP LAN】inoue.tomoyuki
required(IA)FTS, CXS, LID(10:30【Responsible person】K.Tanaka /14:15)
H.Hayashi【Coordinator#1】M.Yoshinuma/Y.T (TC)CXS, PCI, reflectometerakemura(id:731) Mag. Conf.: Using【Coordinator#2】A.Shimizu/H.Nuga LID coil
【ECH】N.Kenmochi(id:738) Mag. Conf.: Exp.
【Gas・vacuum・shutter】C/A
with low gamma (Combined)【Low temp.】ohba.kouki(id:744) Mag. Conf.: Bq = 0%,【LID power】N.Suzuki/K.Nagahara 150%, 200%
(id:752) NBI: Injection into
【Coil power】tanoue.hiroyuki
the discharges with low【central ctrl.】ogawa.hideki
fields【data proc.】M.Ohsuna【EXP LAN】nakamura.osamu(IA)BES, FILD, CXS, FIDA

[TC](13:00 ～ 16:45)ECH, NBI
Impurity Effect JEX on Stellarators, Te fluctuation in e-ITB
gamma
1.25381.2538【Responsible person】M.Osakabe / (TC)PCI, HIBP,
H.Hayashi
CXS, BS, CECE,【Coordinator#1】M.Yoshinuma
Impurity Pellet【Coordinator#2】T.Tokuzawa(Carbon Pellet)【ECH】H.Igami【Gas・vacuum・shutter】B/C【Low temp.】ohba.kouki【LID power】M.Kawai/K.Nagahara (id:723) Impurity【Coil power】tanoue.hiroyuki
pellet/TESPEL【central ctrl.】ogawa.hideki(id:724) Impurity【data proc.】M.Ohsuna【EXP LAN】nakamura.osamu
gas puff

Bq100.0

SCDivCryoH2,Ar【Responsible person】N.Tamura /(TC)CXS, PCI, CECE, CTSアンテナ使用
H.Hayashi【Coordinator#1】T.Tokuzawa/M.Goto (id:724) Impurity gas puff
【Coordinator#2】H.Nakano/Y.Takemur (id:732) Probe: Insertion of Fast Ion
Loss Diagnostics (8-O)
a(id:745) ECH: Collective Thomson【ECH】H.Takahashi
Scattering (CTS) measurement(id:748) ECH: off-axis injection【Gas・vacuum・shutter】B/C(Combined)【Low temp.】noguchi.hiroki(id:749) ICH: Antennae insertion for【LID power】M.Kawai/K.Nagahara
plasma heating by ICH : Subcool【Coil power】takami.shigeyuki
required(id:752) NBI: Injection into the【central ctrl.】ogawa.hideki
discharges with low fields【data proc.】M.Ohsuna(id:762) Impurity powder dropper【EXP LAN】inoue.tomoyuki

LHD projectPrepared byDaily Schedule

N.Tamura

Date

Experimental Subject

2024/4/2(Tue)turbulence in modulated ECH, Turbulence characteristics in densitypeaking plasma, Comparison of turbulence driven transport between
LHD and W7-XExp. No.

Experimental Session Group

1341

TC
89Time Table

10Session Coordinator

M.Yoshinuma[2172] / T.Tokuzawa[2217]
11UP

12131415161718192021

DN

[TC]

Details and Experimental Conditions

Gas[TC](10:30 ～ 16:45) ECH, NBI
H2,Ar
10:30-13:15 Core and edge turbulence in modulated ECH( M.Nishiura)
13:15-15:00 Turbulence characteristics in density-peaking plasma in LHD (R.Yanai)
15:00-16:45 Comparison of turbulence driven transport between LHD and W7-X (H.Sakai(KyushuUniv.), K. Tanaka)
Sequence:3min#Option
1Polarity
CWRax(m)3.6

Bax(T)
2.75

gamma
1.2538

Bq(%)
100.0

Subcooled

Wall Conditioning

GD(Before Exp.): None , GD(After Exp.): None , Cryopump(During Exp.): onRemarks(TC)PCI, HIBP, CXS, BS, CECE, Impurity Pellet (Carbon Pellet)【Precautions for today's LHD experiments】(id:723) Impurity pellet/TESPEL(id:724) Impurity gas puff

22

LHD projectPrepared byDaily Schedule

N.TamuraDate2024/4/3(Wed)Experimental Subject

Investigation of turbulence and heat propagation characteristics during e-ITBformation transition and back transition
Impurity confinement and transport dependence on electron temperature
gradient

Exp. No.

Experimental Session Group

Session Coordinator

1342

TC/MAP

M.shohji[2151] / M.Kobayashi[2169]
A.Shimizu[2454] / T.kobayashi[2231]

89Time Table

1011U
P

1213[TC]

1415
[MAP]

161718192021

DN

Details and Experimental Conditions

Gas[TC](10:30 ～ 14:30) ECH, NBI
10:30-14:25 Investigation of turbulence and heat propagation characteristics during e-ITB
formation transition and back transition(N. Kenmochi)
NBI(#2,#3 MSE), ECH(3 s 0.7MW), ne = 0.5-2.5e19

H2

14:25-14:35 NBI calib. shots
Sequence:3min#Option1

Polarity
CWRax(m)3.6Bax(T)
2.75

gamma
1.2538

Bq(%)
100.0

Subcooled[MAP](14:30 ～ 16:45) ECH, NBI
14:35-16:45 Impurity confinement and transport dependence on electron temperature
gradient(D.M. Roque(Ciemat), N. Tamura)
Sequence:3min#Option1

Polarity
CW

Rax(m)
3.6Bax(T)
2.75

gamma
1.2538

Bq(%)
100.0

Subcooled

Wall Conditioning

GD(Before Exp.): None , GD(After Exp.): None , Cryopump(During Exp.): off
Remarks(TC)FTS, fast CXS, BS(position scan), HIBP, MSE(MAP)HIBP, TESPEL, CXS, Doppler Reflectometer, PCI, SOXMOS【Precautions for today's LHD experiments】(id:723) Impurity pellet/TESPEL(id:724) Impurity gas puff
(id:750) ECH: Focusing point scan : Subcool required

22H2,Ar

LHD projectPrepared byDaily Schedule

Y.Takemura
N.Tamura

Date

Experimental Subject

2024/4/4(Thu)Study on disturbance by injection of high Z(neon)-doped hydrogen pellets,
Study on stabilization mechanism of MHD instability
Assessment of geometrical effect on transport through quadrupole field scanExp. No.

Experimental Session Group

Session Coordinator

1343

IA/TCM.Yoshinuma[2172] / A.Shimizu[2454]
Y.Takemura[2167] / H.Nuga[2211]

89Time Table

1011UP

1213

[IA]

1415
[TC]

1617

18

19

20

Gas

[IA](10:30 ～ 14:15) ECH, NBI
10:30-11:50 Spatiotemporal structure of local and global disturbance triggered by high Z (neon)
doped hydrogen pellet injection (A. Matsuyama (Kyoto Univ., R. Sakamoto)
11:50-12:00 NBI calib. shots
12:00-12:25 [Change of Mag. Config.: 3.6m, 2.75T -> 3.75m, 0.75T]
12:15-14:18 Stabilizing mechanism of MHD instability with island in relatively high density
regime (Y. Takemura)
14:18-14:45 [Change of Mag. Config.: 3.75m, 0.75T -> 3.6m, 1.375T, Bq=200%]
Polarity
CCW
CCW
CCW
CCW
CCW
CCW

Rax(m)
3.6
3.75
3.75
3.775
3.775
3.65

Bax(T)
2.75
0.75
0.6
0.6
0.75
0.6

gamma
1.25381.25381.25381.25381.25381.2538

Bq(%)
100.0
100.0
100.0
100.0
100.0100.0Polarity
CCWCCW

Rax(m)
3.6
3.6Bax(T)
1.375
1.375

gamma
1.25381.1739

Bq(%)
200.0
100.0

H2

Subcooled

Wall Conditioning

GD(Before Exp.): None , GD(After Exp.): None , Cryopump(During Exp.): off
Remarks(IA)FTS, CXS, LID(10:30-14:15)(TC)CXS, PCI, reflectometer【Precautions for today's LHD experiments】(id:731) Mag. Conf.: Using LID coil
(id:738) Mag. Conf.: Exp. with low gamma (Combined)(id:744) Mag. Conf.: Bq = 0%, 150%, 200%
(id:752) NBI: Injection into the discharges with low fields

H2

Subcooled[TC](14:45 ～ 16:45) ECH, NBI
14:45-16:45 Assessment of geometrical effect on transport through quadrupole fieldscan(H.Yamada(U. Tokyo), N. Tamura)
Sequence:3min#Option
12✓

22DN

Details and Experimental Conditions

Sequence:3min#Option
12
34
✓
5
✓
6
✓

21

LHD projectPrepared byDaily Schedule

M. GotoDate

2024/4/5(Fri)Experimental Subject

Experimental study on Alfvén eigenmode
Impurity Effect JEX on Stellarators, Te fluctuation in e-ITB

Exp. No.

Experimental Session GroupSession Coordinator

1344

IA/TCT.Tokuzawa[2217] / H.Nakano[2209]
M.Goto[2290] / Y.Takemura[2167]

89Time Table

10UP

111213[IA]1415[TC]

161718192021

DN

Details and Experimental Conditions

Gas[IA](10:30 ～ 12:30) ECH, NBI, ICH
10:30-12:30 Multiple AE resonances and transition to the hard MHD limit: enhanced EP
transport during AE bursting activity (J. Valera(UC3M), K. Nagaoka)(3 shots of NBI calibration before 12:00)# [Change of Mag. Config.: 0.8T -> 1.375T] will done between 10:30 and 12:30.
12:30-13:00 [Change of Mag. Config.: 1.375T -> 2.75T]

H2

NBI pattern #2: (#2, #3, #4, #5) - (#3, #4, #5) - (#3, #5)
Sequence:3min#Option
12

Polarity
CW
CW

Rax(m)
3.6
3.6

Bax(T)
0.8
1.375

gamma
1.25381.2538

Bq(%)
100.0
100.0

Subcooled[TC](13:00 ～ 16:45) ECH, NBI
13:00- 15:00 Joint Experiment on Effect of Impurities on Stellarator Performance (F.
Nespoli(PPPL), S. Masuzaki)
15:00- 16:45 Study of electron temperature fluctuation behavior in e-ITB plasmas (R. Yanai)
Sequence:3min#Option
1Polarity
CWRax(m)3.6Bax(T)
2.75

gamma
1.253822Bq(%)
100.0

Wall Conditioning

GD(Before Exp.): None , Cryopump(During Exp.): onRemarks(IA)BES, FILD, CXS, FIDA(TC)CXS, PCI, CECE, CTSアンテナ使用【Precautions for today's LHD experiments】(id:724) Impurity gas puff
(id:732) Probe: Insertion of Fast Ion Loss Diagnostics (8-O)(id:745) ECH: Collective Thomson Scattering (CTS) measurement(id:748) ECH: off-axis injection (Combined)(id:749) ICH: Antennae insertion for plasma heating by ICH : Subcool required(id:752) NBI: Injection into the discharges with low fields(id:762) Impurity powder dropper

Subcooled

H2,Ar