25th 13th week(06/03/24 - 06/07/24) 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

H2,He,Ar【Responsible person】T.Seki /H.Hayashi【Coordinator#1】H.Nakano【Coordinator#2】T.Tokuzawa【ECH】H.Igami【Gas・vacuum・shutter】B/C【Low temp.】noguchi.hiroki【LID power】M.Kawai/K.Nagahara【Coil power】takami.shigeyuki【central ctrl.】ogawa.hideki【data proc.】M.Ohsuna【EXP LAN】inoue.tomoyuki

H2,Ar(MAP)【Responsible person】M.Osakabe /CXS, various spectrometers
H.Hayashi(TC)【Coordinator#1】G.Motojima/A.Shimiz Real-time thomson, CXSu(MAP)【Coordinator#2】R.Yanai/T.kobayashi Div. Langmuir probes,【ECH】H.Takahashi
Spectroscopy of the Balmer【Gas・vacuum・shutter】A/Blines【Low temp.】noguchi.hiroki(id:724) Impurity gas puff
【LID power】M.Kawai/K.Nagahara(id:728) Mag. Conf.: 3.55 m【Coil power】tanoue.hiroyuki=< Rax < 3.6 m【central ctrl.】ogawa.hideki(id:751) Mag. Conf.: Rax ＝【data proc.】M.Ohsuna
3.5, 3.53 m【EXP LAN】nakamura.osamu

Sat:None

6/ M3 o.

Sun:None
Mon:None[TC](10:30 ～ 16:45)ECH, NBI
Interaction of EGAM, the turbulence and the radial transport; Turbulence response at both L-H and H-L transition; Confinement study between dimensionally similar H
and He plasmas in LHD; Effect of a mixed-ion plasma on impurity transport in NBI heated plasmas

6/ Tu C
4. W

# Opt. Pol.
1CW
2CW
3CW
4CW
5CW

Rax
3.753.55
3.9
3.6
3.9

Bax
1.375
1.0
1.0
2.75
2.5385gamma
1.25381.25381.25381.25381.2538[MAP](10:30 ～ 12:15)ECH, NBI
Impurity flow reversal in open field lines# Opt. Pol.
1CW

Rax
3.6

Bax
2.75

gamma
1.2538

6/ W C
5 e. W

Bq
100.0

SC

Bq
100.0
100.0
100.0
100.0
100.0

SC

H2 GD
DivCryo[TC](12:15 ～ 14:45)ECH, NBI
Real-time plasma control under low-turbulence
conditions, The study of the density dependence of ion
transport# Opt. Pol.
1CW
2CW

Rax
3.6
3.55

Bax
2.75
2.7887gamma
1.25381.2538

Bq
100.0
100.0

SC

[MAP](14:45 ～ 16:45)ECH, NBI
Influence of the magnetic configuration on thesubdivertor pressure# Opt. Pol.
1CW
2CW

Rax
3.55
3.53

Bax
2.78872.8045gamma
1.25381.2538

Bq
100.0
100.0

SCHe GDDiv
Cryo

6/ Th C
6. W

Rax
3.6
3.6
3.75

Bax
1.375
2.75
2.64

gamma
1.25381.25381.2538

Bq
100.0
100.0
100.0

SC

None
Div
Cryo

6/ Fr C
7. W

Rax
3.6
3.75
3.75
3.75
3.75

Bax
2.75
2.0
1.5
0.6
2.64

gamma
1.25381.25381.25381.25381.2538

Bq
100.0
100.0
100.0
100.0
0.0

C-pellet, MSE, pol. CXS,
【Responsible person】S.Masuzaki / 10:30-12:45
Ip scan, CH4 puff
H.Hayashi
13:20-15:10 Thomson, CXS, Xtal(Ti),PCI, HIBP, off-axis ECH, LID【Coordinator#1】H.Nakano
15:40-16:45 Thomson, FIR, PCI(fine),【Coordinator#2】M.Nishiura
HICO2, Mag Probes, CXS, MSE,
Backscattering, Reflectometer, HIBP
H2, 【ECH】N.Kenmochi/H.Igami# After 15:40, plasma will exist from
【Gas・vacuum・shutter】C/A
0.25 or 0.3 s until around 10 s.
Ar, 【Low temp.】noguchi.hiroki# Each person in charge of theCH4 【LID power】M.Kawai/K.Nagahara diagnostics should check that data
can be obtained from start to finish.
【Coil power】takami.shigeyuki(id:724) Impurity gas puff
【central ctrl.】ogawa.hideki(id:731) Mag. Conf.: Using LID coil
【data proc.】M.Ohsuna(id:733) High plasma current exp.
【EXP LAN】inoue.tomoyuki(100 kA =< Ip < 150kA) (Combined)(IA)10:30-11:50 CXS, ECE, C-[IA](10:30 ～ 16:45)ECH, NBI
Development of CECE for measuring temperature fluctuations inside/outside e-ITB, MHD instability suppression by RMP field, Plasma shape effect on bootstrap current
in high collisional regime in LHD# Opt. Pol.
1CW
2CW
3CW
4CW
5CW

(id:723) Impurity pellet/TESPEL(id:724) Impurity gas puff
(id:728) Mag. Conf.: 3.55 m =<Rax < 3.6 m(id:731) Mag. Conf.: Using LIDcoil(id:752) NBI: Injection into thedischarges with low fields(TC)[TC](10:30 ～ 16:45)ECH, NBI
Relation between plasma profile corrugations including transport barrier and magnetic field configurations; Electron-scale turbulence on zero gradient; Investigation ofthe central negative diffusivity during the density modulation# Opt. Pol.
1CW
2CW
3CW

(TC)
10:30-12:00 HIBP, GV closed(NBI#4, #5)
12:15-13:35 LID cancel, CXS
14:10-16:45 CXS3, CXS8, CXSn,TESPEL, Spectrometers(SOXMOS, EUV short/long)

SCNone【Responsible person】S.Sakakibara ECE, HIBP
12:05-14:55 NBI 3s, CXS(Vp,/ H.Hayashi
Vt), GV of NBI#3 open, LID【Coordinator#1】H.Funaba
15:45-16:45 NBI 3s【Coordinator#2】Y.Takemura(id:724) Impurity gas puff
(id:731) Mag. Conf.: Using LID
H2, 【ECH】R.Yanai【Gas・vacuum・shutter】B/C
coil
Ar, 【Low temp.】noguchi.hiroki(id:734) Probe: HDLP Probe
CH4 【LID power】M.Kawai/K.Nagahara access near LCFS
(id:744) Mag. Conf.: Bq = 0%,【Coil power】tanoue.hiroyuki
150%, 200%
【central ctrl.】ogawa.hideki(id:752) NBI: Injection into the【data proc.】M.Ohsuna
discharges with low fields【EXP LAN】inoue.tomoyuki

LHD projectPrepared byDaily Schedule

N.Tamura

Date

Experimental Subject

2024/6/4(Tue)Interaction of EGAM, the turbulence and the radial transport; Turbulence
response at both L-H and H-L transition; Confinement study between
dimensionally similar H and He plasmas in LHD; Effect of a mixed-ion plasma on
impurity transport in NBI heated plasmas

Exp. No.

Experimental Session Group1374

TC89Time Table

10Session Coordinator

H.Nakano[2209] / T.Tokuzawa[2217]
11UP121314151617181920

Gas[TC](10:30 ～ 16:45) ECH, NBI
10:30-12:00 Interaction of EGAM, the turbulence and the radial transport (A. Shimizu)
12:00-12:15 [Change of Mag. Config.: 3.75m, 1.375T -> 3.55m, 1T]
12:15-13:35 Turbulence response at L-H and H-L transitions (T. Tokuzawa)# [Change of Mag. Config.: 3.55m, 1T -> 3.9m, 1T] will be done between 12:15 and 13:35.
13:35-14:10 [Change of Mag. Config.: 3.9m, 1T -> 3.6m, 2.75T]
14:10-15:15 Confinement study between dimensionally similar H and He plasmas in LHD (N. Tamura)
15:15-15:25 NBI calib. (3 shots)
15:25-15:50 [Change of Mag. Config.: 3.6m, 2.75T -> 3.9m, 2.5385T]
15:50-16:45 Effect of a mixed-ion plasma on impurity transport in NBI heated plasmas (N. Tamura)
Sequence:3min

OptionPolarity
CW
CW
CW
CW
CW

Rax(m)
3.75
3.55
3.9
3.6
3.9

Bax(T)
1.375
1.0
1.0
2.75
2.5385gamma
1.25381.25381.25381.25381.2538

Bq(%)
100.0
100.0
100.0
100.0
100.0

Subcooled

Wall ConditioningGD(Before Exp.): None , GD(After Exp.): H2 , Cryopump(During Exp.): onRemarks(TC)
10:30-12:00 HIBP, GV closed (NBI#4, #5)
12:15-13:35 LID cancel, CXS
14:10-16:45 CXS3, CXS8, CXSn, TESPEL, Spectrometers (SOXMOS, EUV short/long)【Precautions for today's LHD experiments】(id:723) Impurity pellet/TESPEL(id:724) Impurity gas puff
(id:728) Mag. Conf.: 3.55 m =< Rax < 3.6 m(id:731) Mag. Conf.: Using LID coil
(id:752) NBI: Injection into the discharges with low fields22DN[TC]Details and Experimental Conditions

#12
34
5

21

H2,He,ArLHD projectPrepared byDaily Schedule

N.Tamura
G.Motojima

Date2024/6/5(Wed)Experimental Subject

Impurity flow reversal in open field lines
Real-time plasma control under low-turbulence conditions, The study of thedensity dependence of ion transport
Influence of the magnetic configuration on the subdivertor pressure

Exp. No.

Experimental Session Group

Session Coordinator

1375

MAP/TC

G.Motojima[2142] / R.Yanai[2163]
A.Shimizu[2454] / T.kobayashi[2231]

89Time Table

10UP

11[MAP]

12131415

[TC]

[MAP]

161718192021DN

Details and Experimental Conditions

Gas[MAP](10:30 ～ 12:15) ECH, NBI
10:30-12:18 Impurity flow reversal in open field lines(Nishizawa(Kyushu Univ.), T.Kobayashi)

H2,Ar[ !!! Tightening at 3.55 m, 2.7887 T before settling to 3.6 m, 2.75 T !!! ]Sequence:3min#Option1

Polarity
CWRax(m)3.6Bax(T)
2.75

gamma
1.2538

Bq(%)
100.0

Subcooled[TC](12:15 ～ 14:45) ECH, NBI
12:21-13:18 Real-time plasma control under low-turbulence conditions (T. Kinoshita (Kyushu Univ.), K. Tanaka)
13:21-13:27 NBI calib. (3 shots)
13:27-13:39 [Change of Mag. Config.: 3.6m, 2.75T --> 3.55m, 2.7887T]
13:39-14:39 The study of the density dependence of ion transport(W. H. Ko (KFE), K. Ida, M. Yoshinuma）

H2,Ar

Sequence:3min#1
2

OptionPolarity
CW
CW

Rax(m)
3.6
3.55

Bax(T)
2.75
2.7887gamma
1.25381.2538

Bq(%)
100.0
100.0

Subcooled[MAP](14:45 ～ 16:45) ECH, NBI
14:42-15:36 Influence of the magnetic configuration on the subdivertor pressure (U. Wenzel(IPP), G. Motojima)
15:36-15:54 [Change of Mag. Config.: 3.55m, 2.7887T -> 3.53m, 2.8045T)
15:54-16:45 Influence of the magnetic configuration on the subdivertor pressure(U. Wenzel(IPP), G. Motojima)
Sequence:3min#1
2OptionPolarity
CW
CW

Rax(m)
3.55
3.53

Bax(T)
2.78872.8045gamma
1.25381.2538

Bq(%)
100.0
100.0

Subcooled

Wall Conditioning

GD(Before Exp.): H2 , GD(After Exp.): He , Cryopump(During Exp.): onRemarks(MAP)
CXS, various spectrometers(TC)
Real-time thomson, CXS(MAP)Div. Langmuir probes, Spectroscopy of the Balmer lines【Precautions for today's LHD experiments】(id:724) Impurity gas puff
(id:728) Mag. Conf.: 3.55 m =< Rax < 3.6 m(id:751) Mag. Conf.: Rax ＝ 3.5, 3.53 m

22H2,Ar

LHD projectPrepared byDaily Schedule

N.Tamura

Date

Experimental Subject

2024/6/6(Thu)

Relation between plasma profile corrugations including transport barrier andmagnetic field configurations; Electron-scale turbulence on zero gradient;
Investigation of the central negative diffusivity during the density modulation

Exp. No.

Experimental Session Group1376

TC89Time Table

10Session Coordinator

H.Nakano[2209] / M.Nishiura[2184]
11UP

1213

1415

16

1718

19

20

2122

D
N

[TC]

Details and Experimental Conditions

Gas[TC](10:30 ～ 16:45) ECH, NBI
10:30-12:45 Relation between plasma profile corrugations including transport barrier andmagnetic field configurations (M. Sasaki (Nihon Univ.), T. Kobayashi)
12:45-13:20 [Change of Mag. Config.: 3.6m, 1.375T -> 3.6m, 2.75T]
13:20-15:20 Electron-scale turbulence on zero gradient (T. Nasu, T. Tokuzawa)
15:10-15:20 NBI Calib. (3 shots)
15:20-15:40 [Change of Mag. Config.: 3.6m, 2.75T -> 3.75m, 2.64T]
15:40-16:45 Investigation of the central negative diffusivity during the density modulation (Y.
Ohtani (QST), K. Tanaka)
15:40-16:45 Exploration of main-ion transport experiments in LHD using gas-puff modulation (D.
Damaskopoulos(UWM), N. Tamura) [Piggy-backed]

H2,Ar,CH4Sequence:3min#Option
123Polarity
CWCW
CW

Rax(m)
3.6
3.6
3.75

Bax(T)
1.375
2.75
2.64

gamma
1.25381.25381.2538

Bq(%)
100.0
100.0
100.0

Subcooled

Wall Conditioning

GD(Before Exp.): He , GD(After Exp.): None , Cryopump(During Exp.): on
Remarks(TC)
10:30-12:45 C-pellet, MSE, pol. CXS, Ip scan, CH4 puff
13:20-15:10 Thomson, CXS, Xtal(Ti), PCI, HIBP, off-axis ECH, LID
15:40-16:45 Thomson, FIR, PCI(fine), HICO2, Mag Probes, CXS, MSE, Backscattering, Reflectometer, HIBP
# After 15:40, plasma will exist from 0.25 or 0.3 s until around 10 s.
# Each person in charge of the diagnostics should check that data can be obtained from start to finish.
【Precautions for today's LHD experiments】(id:724) Impurity gas puff
(id:731) Mag. Conf.: Using LID coil
(id:733) High plasma current exp. (100 kA =< Ip < 150kA) (Combined)(id:748) ECH: off-axis injection (Combined)(id:752) NBI: Injection into the discharges with low fields

LHD projectPrepared byDaily Schedule

H.Funaba

Date

Experimental Subject

2024/6/7(Fri)Development of CECE for measuring temperature fluctuations
inside/outside e-ITB, MHD instability suppression by RMP field, Plasma
shape effect on bootstrap current in high collisional regime in LHD

Exp. No.

Experimental Session Group1377

IA89Time Table

10Session Coordinator

H.Funaba[2144] / Y.Takemura[2167]
11U
P

1213

14

15

16

1718

1920

21

DN

[IA]

Details and Experimental Conditions

Gas[IA](10:30 ～ 16:45) ECH, NBI

H2,Ar,CH

10:20-11:40 Development of C-ECE for measuring temperature fluctuation inside/outside e-ITB (M.
4Gong (U. Tokyo), M. Nishiura)# NBI calib. (3 shots) will be done between 10:20 and 11:40.
11:40-11:55 [Change of Mag. Config.: 3.6m, 2.75T -> 3.75m, 2T]
11:55-14:28 MHD instability suppression by RMP field (S. Ito (Nagoya U), K.Y. Watanabe)# [Changes of Mag. Strength.: 2T -> 1.5T -> 0.6T] will be done between 11:55 and 14:28.
14:28-15:48 [Change of Mag. Config.: 3.75m, 0.6T, B = 100% -> 3.75m, 2.64T, Bq = 0%]# Demagnetised from 3.75m, 0.6T for transition to Bq=0%; re-energised after reversal of IS coil polarity.
15:48-16:45 Plasma shape effect on bootstrap current in high collisional regime in LHD (O. Mitarai,K.Y. Watanabe)
NBI pattern #4: (#1, #2, #3, #4, #5) - 12:00 (#2, #3, #4, #5) - 14:15 (#2, #3, #4) - 15:45 (#2, #3)
Sequence:3min

#12
3
4
5

OptionPolarity
CW
CW
CW
CW
CW

22Rax(m)
3.6
3.75
3.75
3.75
3.75

Bax(T)
2.75
2.0
1.5
0.6
2.64

gamma
1.25381.25381.25381.25381.2538Wall Conditioning

GD(Before Exp.): None , Cryopump(During Exp.): offRemarks(IA)10:30-11:50 CXS, ECE, C-ECE, HIBP
12:05-14:55 NBI 3s, CXS(Vp, Vt), GV of NBI#3 open, LID
15:45-16:45 NBI 3s【Precautions for today's LHD experiments】(id:724) Impurity gas puff
(id:731) Mag. Conf.: Using LID coil
(id:734) Probe: HDLP Probe access near LCFS
(id:744) Mag. Conf.: Bq = 0%, 150%, 200%
(id:752) NBI: Injection into the discharges with low fields

Bq(%)
100.0
100.0
100.0
100.00.0Subcooled