25th 11th week(05/20/24 - 05/24/24) schedule for LHD experiment
Date

Weekly report :Schedule of the dayDay Btof dire
the ctioweek nMorning (～ 12:15)

Afternoon (12:15 ～ 16:45)

WallGasExperiment implementation system

Remark

Sat:He GD

5/ M
20 o.

Sun:He GD
Mon:
None(MAP)[MAP](10:30 ～ 16:45)ECH, NBI, ICH
RF plasma production at relatively low magnetic fields for wall Conditioning, Micro-trench measurement of incident ion angles and boron deposition at the divertor
surface, Mitigation of tungsten-induced plasma termination and identification of transient transport mechanisms

5/ Tu C
21 . W# Opt. Pol.
1CW
2CW
3 ✓ CW
4 ✓ CW

Rax
3.6
3.6
3.6
3.6

Bax
0.4
2.75
0.5
0.6

gamma
1.25381.25381.25381.2538

Bq
100.0
100.0
100.0
100.0

H2,He

manipulator(4.5L, 10.5L),【Responsible person】S.Masuzaki / Sample
IPD(B), TESPEL(W), ECE, Penning
H.Hayashi
Gauges, QMS, Fast Ion Gauges,
Pressure Gauges【Coordinator#1】M. Shoji【Coordinator#2】M. Kobayashi(id:723) Impurity pellet/TESPEL(id:740) ICH: IC wave injection into
【ECH】H.Igami
the vaccum (w/o plasma)【Gas・vacuum・shutter】C/A(id:748) ECH: off-axis injection【Low temp.】noguchi.hiroki(Combined)【LID power】M.Kawai/K.Nagahara (id:749) ICH: Antennae insertion forplasma heating by ICH : Subcool【Coil power】takami.shigeyuki
required(id:752) NBI: Injection into the【central ctrl.】maeno.hiroya
discharges with low fields【data proc.】M.Ohsuna(id:756) Insertion of sample, etc:
【EXP LAN】inoue.tomoyuki
Insertion of the alpha particle

H2,He,
Ar【Responsible person】T.Seki /H.Hayashi【Coordinator#1】R.Seki【Coordinator#2】K.Ogawa【ECH】H.Takahashi【Gas・vacuum・shutter】B/C【Low temp.】noguchi.hiroki【LID power】M.Kawai/K.Nagahara【Coil power】tanoue.hiroyuki【central ctrl.】maeno.hiroya【data proc.】M.Ohsuna【EXP LAN】nakamura.osamu

He,Ar,
H2【Responsible person】M.Isobe /Crystal(Ar), CXS(B), Boron line
emission measurements
H.Hayashi【Coordinator#1】R.Yanai/T.Tokuzawa (TC)【Coordinator#2】C.Suzuki/M.Nishiura Low power ECH(10 s), DNPA, FIDA,ECE, CXS (NBI#3 GV should be【ECH】N.Kenmochiopened) and H/He ratio【Gas・vacuum・shutter】A/B(id:724) Impurity gas puff
【Low temp.】noguchi.hiroki(id:736) Mag. Conf.: Subcool
conditions (Combined) : Subcool【LID power】M.Kawai/K.Nagahara
required【Coil power】takami.shigeyuki(id:747) ECH: EC wave injection for【central ctrl.】maeno.hiroya
more than 10 s (Combined)【data proc.】M.Ohsuna(id:749) ICH: Antennae insertion forplasma heating by ICH : Subcool【EXP LAN】inoue.tomoyuki

H2,Ar,He【Responsible person】M.Osakabe / (IA)NBI#5: He beam (60 keV, 67keV),H.Hayashi
FIDA (He), INPA, Fast TS【Coordinator#1】T.kobayashi/H.Fun (TC)
NBI#5(He), TESPEL, CXS,
aba
Spectrometers (SOXMOS, EUV【Coordinator#2】A.Shimizu/M.Goto Short/Long)【ECH】R.Yanai# Shutters for the CXS should beclosed at the end of the【Gas・vacuum・shutter】C/A
experiment due to the scheduled【Low temp.】noguchi.hiroki
weekend GDC.
【LID power】M.Kawai/K.Nagahara(id:723) Impurity pellet/TESPEL【Coil power】tanoue.hiroyuki(id:724) Impurity gas puff
【central ctrl.】maeno.hiroya(id:749) ICH: Antennae insertion【data proc.】M.Ohsunafor plasma heating by ICH :【EXP LAN】nakamura.osamu
Subcool required

SCHe GD[IA](10:30 ～ 16:45)ECH, NBI, ICH
Study of the fast-ion acceleration by ICRF heating for p-11B fusion reaction, Validation of improved p-11B fusion reactivity using MeV ICRF tail ions, Dependence of p11B fusion reactivity on the boron density profile and fast ion confinement time
# Opt. Pol.
CCW

15/ W CC22 e. W

Rax
3.6

Bax
2.75

gamma
1.2538Bq
100.0

SCHe GD[MAP](10:30 ～ 12:45)ECH, NBI
Impact of impurity powder dropping on He plasma

5/ Th CC
23 . W# Opt. Pol.
1CCW

Rax
3.6

Bax
2.75

gamma
1.2538Bq
100.0

SC(MAP)High power ECH (2 s), IPD(B),[TC](12:45 ～ 16:45)ECH, NBI, ICH
Validation of coupled ICRF wave and fast ion transport simulation codes at various
ion species concentrations# Opt. Pol.
1CCW
2CCWRax
3.6
3.6

Bax
2.75
2.85

gamma
1.25381.2538Bq
100.0
100.0SC✓(IA)CXS(C and B), Boron pellets,TESPEL(SiB, B), IPD, tFIDA(H),pFIDA(He), PIPS, NBI injectionenergy scan
(id:723) Impurity pellet/TESPEL(id:733) High plasma current exp.
(100 kA =< Ip < 150kA)(Combined)(id:749) ICH: Antennae insertion
for plasma heating by ICH :Subcool required(id:756) Insertion of sample, etc:
Insertion of the alpha particle
detector(id:762) Impurity powder dropper

Nonerequired[IA](10:30 ～ 14:45)ECH, NBI
Sub-Alfvenic Harmonic ICEs, Ultra higher harmonic ICEs, Turbulence driven
transport

5/ Fr C
24 . W# Opt. Pol.
1CW

Rax
3.6

Bax
2.75

gamma
1.2538Bq
100.0[TC](14:45 ～ 16:45)ECH, NBI, ICH
Confinement study of He plasmaSC# Opt. Pol.
1CW

Rax
3.6

Bax
2.75

gamma
1.2538Bq
100.0

SCNoneLHD projectPrepared byDaily Schedule

N.Tamura

Date

Experimental Subject

2024/5/21(Tue)RF plasma production at relatively low magnetic fields for wall Conditioning,
Micro-trench measurement of incident ion angles and boron deposition at thedivertor surface, Mitigation of tungsten-induced plasma termination andidentification of transient transport mechanisms

Exp. No.

Experimental Session Group1366

MAP
89Time Table

10Session Coordinator

M. Shoji[2151] / M. Kobayashi[2169]
11UP

1213

14

15

161718192021DN[MAP]

Details and Experimental Conditions

Gas[MAP](10:30 ～ 16:45) ECH, NBI, ICH
10:30-12:45 RF plasma production at relatively low magnetic fields for wall conditioning（Y.
Kovtun(KIPT), T. Seki）
12:45-13:30 [Change of Mag. Config.: 3.6m, 4.0T -> 3.6m, 2.75T]
13:30-14:55 Micro-trench measurement of incident ion angles and boron deposition at thedivertor surface (S. Abe(PPPL), S. Masuzaki)
14:55-15:05 NBI calib. (3 shots)
15:05-16:45 Mitigation of tungsten-induced plasma termination and identification of transienttransport mechanisms (H. Bouvain(IPP), N. Tamura)
Sequence:3min#Option123✓4✓

Polarity
CW
CW
CW
CW

Rax(m)
3.6
3.6
3.6
3.6Bax(T)
0.4
2.75
0.50.622gamma
1.25381.25381.25381.2538

Bq(%)
100.0
100.0
100.0
100.0

H2,He

Subcooled

Wall Conditioning

GD(Before Exp.): None , GD(After Exp.): He , Cryopump(During Exp.): offRemarks(MAP)
Sample manipulator(4.5L, 10.5L), IPD(B), TESPEL(W), ECE, Penning Gauges, QMS, Fast Ion Gauges,
Pressure Gauges【Precautions for today's LHD experiments】(id:723) Impurity pellet/TESPEL(id:740) ICH: IC wave injection into the vaccum (w/o plasma)(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:756) Insertion of sample, etc: Insertion of the alpha particle detector(id:760) Insertion of sample, etc: Exposure of a material sample to divertor plasma by the manipulators(id:762) Impurity powder dropper

LHD projectPrepared by

Daily Schedule

R.Seki

Date

Experimental Subject

2024/5/22(Wed)Study of the fast-ion acceleration by ICRF heating for p-11B fusion reaction,Validation of improved p-11B fusion reactivity using MeV ICRF tail ions,Dependence of p-11B fusion reactivity on the boron density profile and fast ion
confinement timeExp. No.

Experimental Session Group1367

IA89Time Table

10Session Coordinator

R.Seki[2201] / K.Ogawa[2229]
11UP

1213

14

15

16

17

18

1920

Gas

[IA](10:30 ～ 16:45) ECH, NBI, ICH
10:30-12:45 Study of the fast-ion acceleration by ICRF heating for p-11B fusion reaction (R.
Magee(TAE), M.Osakabe)
12:45-14:45 Validation of improved p-11B fusion reactivity using MeV ICRF tail ions (J. Wang)
14:45-16:45 Dependence of p-11B fusion reactivity on the boron density profile and fast ion
confinement time (Y. Fujiwara(TAE), M.Osakabe)
Polarity
CCWRax(m)3.6Bax(T)
2.75

22

DN

[IA]

Details and Experimental Conditions

Sequence:3min#Option
121gamma
1.2538

Bq(%)
100.0

H2,He,Ar

Subcooled

Wall Conditioning

GD(Before Exp.): He , GD(After Exp.): He , Cryopump(During Exp.): off
Remarks(IA)
CXS(C and B), Boron pellets, TESPEL(SiB, B), IPD, tFIDA(H), pFIDA(He), PIPS, NBI injection energy scan
【Precautions for today's LHD experiments】(id:723) Impurity pellet/TESPEL(id:733) High plasma current exp. (100 kA =< Ip < 150kA) (Combined)(id:749) ICH: Antennae insertion for plasma heating by ICH : Subcool required(id:756) Insertion of sample, etc: Insertion of the alpha particle detector(id:762) Impurity powder dropper

LHD projectPrepared byDaily Schedule

N.TamuraDate2024/5/23(Thu)

Experimental Subject

Impact of impurity powder dropping on He plasma
Validation of coupled ICRF wave and fast ion transport simulation
codes at various ion species concentrations

Exp. No.

Experimental Session GroupSession Coordinator

1368

MAP/TC

R.Yanai[2163] / C.Suzuki[2255]
T.Tokuzawa[2217] / M.Nishiura[2184]

89Time Table

10UP

1112

13

[MAP]

1415

[TC]

1617

18

19

20

Gas

[MAP](10:30 ～ 12:45) ECH, NBI
10:30-12:45 Impact of impurity powder dropping on He plasma (S. Masuzaki)
10:30-12:45 Comparison of turbulent transport between LHD and W7-X (H. Sakai(KyushuUniv.)、K. Tanaka) [Piggy-backed]# NBI calib. (3 shots) will be done between 10:30-12:45.
Polarity
CCWRax(m)3.6Bax(T)
2.75

gamma
1.2538

Bq(%)
100.0

He,Ar

Subcooled[TC](12:45 ～ 16:45) ECH, NBI, ICH
12:45 - 12:55 [Change of Discharge sequence: 3 min -> 3 min 30s (Wall DC)]
12:45 - 16:45 Validation of coupled ICRF wave and fast ion transport simulation codes at various
ion species concentrations (N. Tsujii(U. Tokyo), R. Seki)# [Chage of Mag. Config.: 3.6m, 2.75T -> 3.6m, 2.85T(Sub-cool)] will be done around 14:50.
Sequence:3min30s(Wall DC)#OptionPolarity
1CCW
2CCWRax(m)3.6
3.6Bax(T)
2.75
2.85

gamma
1.25381.253822

DN

Details and Experimental Conditions

Sequence:3min#Option
121

Bq(%)
100.0
100.0

Subcooled✓

Wall Conditioning

GD(Before Exp.): He , GD(After Exp.): None , Cryopump(During Exp.): offRemarks(MAP)
High power ECH (2 s), IPD(B), Crystal(Ar), CXS(B), Boron line emission measurements(TC)
Low power ECH(10 s), DNPA, FIDA, ECE, CXS (NBI#3 GV should be opened) and H/He ratio【Precautions for today's LHD experiments】(id:724) Impurity gas puff
(id:736) Mag. Conf.: Subcool conditions (Combined) : Subcool required(id:747) ECH: EC wave injection for more than 10 s (Combined)(id:749) ICH: Antennae insertion for plasma heating by ICH : Subcool required(id:762) Impurity powder dropper

H2,He,ArLHD projectPrepared byDaily Schedule

N.Tamura

Date

Experimental Subject

2024/5/24(Fri)Sub-Alfvenic Harmonic ICEs, Ultra higher harmonic ICEs, Turbulence
driven transport
Confinement study of He plasmaExp. No.

Experimental Session Group

Session Coordinator

1369

IA/TCT.kobayashi[2231] / A.Shimizu[2454]
H.Funaba[2144] / M.Goto[2290]

89Time Table

1011UP

1213[IA]1415[TC]

161718

1920

2122DNDetails and Experimental Conditions

Gas[IA](10:30 ～ 14:45) ECH, NBI
10:30–14:45 Sub-Alfvenic harmonic ICEs modulated by He beam injection (G. Yun(POSTECH), H. Igami)
10:30–14:45 Excitation of ultra higher harmonic ICEs with MHD instabilities during He beam injection (H.
Igami)
10:30–14:45 Comparison of turbulent transport between LHD and W7-X (H. Sakai (Kyushu U.), K. Tanaka)[piggy-backed, it may not be carried out]

H2,Ar

# NBI calib. (3 shots) before 12:00.
NBI pattern #2: (#1, #2, #3, #4, #5) – (#2, #3, #4, #5) – (#3, #4, #5) – (#3, #4)
Sequence:3min#1

OptionPolarity
CW

Rax(m)
3.6

Bax(T)
2.75

gamma
1.2538

Bq(%)
100.0

Subcooled[TC](14:45 ～ 16:45) ECH, NBI, ICH
14:45 – 16:45 Confinement study between dimensionally similar H and He plasmas in LHD (N. Tamura)

He,Ar

Sequence:3min#1Option

Polarity
CWRax(m)3.6

Bax(T)
2.75

gamma
1.2538

Bq(%)
100.0

Subcooled

Wall Conditioning

GD(Before Exp.): None , Cryopump(During Exp.): off
Remarks(IA)
NBI#5: He beam (60 keV, 67keV), FIDA (He), INPA, Fast TS(TC)
NBI#5(He), TESPEL, CXS, Spectrometers (SOXMOS, EUV Short/Long)# Shutters for the CXS should be closed at the end of the experiment due to the scheduled weekend GDC.
【Precautions for today's LHD experiments】(id:723) Impurity pellet/TESPEL(id:724) Impurity gas puff
(id:749) ICH: Antennae insertion for plasma heating by ICH : Subcool required