25th 14th week(06/10/24 - 06/14/24) 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

H2,
N2,Ne,
Ar【Responsible person】K.Tanaka /H.Hayashi【Coordinator#1】K.Mukai【Coordinator#2】M.Shoji【ECH】H.Igami【Gas・vacuum・shutter】C/A【Low temp.】ohba.kouki【LID power】M.Kawai/K.Nagahara【Coil power】tanoue.hiroyuki【central ctrl.】maeno.hiroya【data proc.】M.Ohsuna【EXP LAN】inoue.tomoyuki

Remark

Sat:None

6/ M
10 o.

Sun:
None
Mon:
None
[MAP](10:30 ～ 16:45)ECH, NBI
Long-pulse steady-state shots, exposure of material samples, and steady-state detachment scenarios

6/ Tu CC
11 . W# Opt. Pol.
1
CCW
2
CCW
3CCW
4CCW
5 ✓ CCW

Rax
3.55
3.53
3.6
3.85
3.9

Bax
2.78872.80452.75
2.57142.5385gamma
1.25381.25381.25381.25381.2538

Bq
100.0
100.0
100.0
100.0
100.0

SCHe GD

6/ W C
12 e. W

Rax
3.75
3.6

Bax
1.375
2.75gamma
1.25381.2538

Bq
100.0
100.0

H2,Ne,
Ar

H2,N2,Ne,Ar

so the diverter cryo-pump is off【Responsible person】S.Masuzaki / time(80 K) until 11:30 and on (20 K) fromM.Yokota
13:30.
5 s NBI, Gas-puff feedback control,【Coordinator#1】M.Kobayashi
LID (1/1 island cancel)【Coordinator#2】G.Motojima
IPD(Li), CBS, CTS, VUV/EUV
spectrometers, Divertor VIS【ECH】M.Nishiura
spectrometer, Filter camera,【Gas・vacuum・shutter】A/B
Bolometers, Divertor Langmuir【Low temp.】ohba.koukiprobes, IR cameras【LID power】M.Kawai/K.Nagahara(id:724) Impurity gas puff
【Coil power】tanoue.hiroyuki(id:728) Mag. Conf.: 3.55 m =< Rax <3.6 m【central ctrl.】maeno.hiroya(id:731) Mag. Conf.: Using LID coil
【data proc.】M.Ohsuna(id:733) High plasma current exp.
【EXP LAN】nakamura.osamu(100 kA =< Ip < 150kA) (Combined)

H2,Ne,Ar【Responsible person】T.Seki /M.Yokota【Coordinator#1】T.kobayashi【Coordinator#2】H.Nakano【ECH】R.Yanai【Gas・vacuum・shutter】C/A【Low temp.】ohba.kouki【LID power】M.Kawai/K.Nagahara【Coil power】takami.shigeyuki【central ctrl.】maeno.hiroya【data proc.】M.Ohsuna【EXP LAN】nakamura.osamu

SCNoneDiv
Cryo(MAP)# Note: Adjust the cooling start[MAP](10:30 ～ 16:45)ECH, NBI
The relation between plasma confinement and edge neutral particle, Sustainment of divertor detachment by using feedback control impurity seeding, Plasma modificationand supplemental wall conditioning through lithium granule introduction

6/ Th C
13 . W# Opt. Pol.
1CW
2CW
3
CW
4CWRax3.55
3.65
3.6
3.55

Bax
2.78872.71232.75
2.7887gamma
1.25381.25381.25381.2538

Bq
100.0
100.0
100.0
100.0

SCHe GDDiv
Cryo[TC](10:30 ～ 16:45)ECH, NBI
Study of MHD equilibrium, global stability and transport phenomena in an LHD plasma with zero rotational transform layer/Real-time plasma control/Effect of boron
powder injection on density limit

6/ Fr C
14 . W# Opt. Pol.
1CW
2CW
3 ✓ CW

Rax
3.6
3.6
3.75

Bax
1.3
2.75
2.64

gamma
1.25381.25381.2538Bq
100.0
100.0100.0(id:724) Impurity gas puff
(id:728) Mag. Conf.: 3.55 m =< Rax <3.6 m(id:731) Mag. Conf.: Using LID coil
(id:733) High plasma current exp.

(TC)
【Responsible person】S.Sakakibara 5s NBI/ M.Yokota
TS, CXS, ECE, HIBP, MSE,
【Coordinator#1】T.Tokuzawa
PCI, real-time TS【Coordinator#2】H.Nakano(id:724) Impurity gas puff
【ECH】M.NIshiura(id:733) High plasma【Gas・vacuum・shutter】B/Ccurrent exp. (100 kA =< Ip【Low temp.】ohba.kouki< 150kA) (Combined)【LID power】M.Kawai/K.Nagahara (id:734) Probe: HDLP
【Coil power】takami.shigeyuki
Probe access near LCFS
【central ctrl.】maeno.hiroya(id:752) NBI: Injection into
【data proc.】M.Ohsuna
the discharges with low【EXP LAN】nakamura.osamu
fields[TC](10:30 ～ 16:45)ECH, NBI
Impurity transport, Effect of magnetic shear, Real-time plasma control# Opt. Pol.
1CW
2CW

(MAP)
10:30-12:47 4s NBI, Balmer series
spectroscopy, Divertor Langmuirprobes
13:00-13:50 4s NBI, Sample
manipulator, CXS
14:18-16:36 4s NBI, LID# After 13:00, plasma will exist from0.25 or 0.3 s until around 13 s.
# Each person in charge of thediagnostics should check that data
can be obtained from start to finish.

SCDivCryo(TC)
5s NBI
10:30-12:10 PCI, Crystal(Ti),HIBP, MSE, CXS(Ti, Vt, Vp, Ne)
12:40-15:10 CXS, PCI, Real-timeTS
15:10-16:45 IPD(B)(id:724) Impurity gas puff
(id:733) High plasma current exp.
(100 kA =< Ip < 150kA)(Combined)(id:734) Probe: HDLP Probe
access near LCFS
(id:752) NBI: Injection into thedischarges with low fields(id:762) Impurity powder dropper

LHD projectPrepared byDaily Schedule

N.Tamura

Date

Experimental Subject

2024/6/11(Tue)Long-pulse steady-state shots, exposure of material samples, and steadystate detachment scenarios

Exp. No.

Experimental Session Group1378

MAP
89Time Table

10Session Coordinator

K.Mukai[2240] / M.Shoji[2151]
11UP

12

13

14

15

16

17

18

19

20

21

DN[MAP]

Details and Experimental Conditions

Gas[MAP](10:30 ～ 16:45) ECH, NBI

H2,N2,Ne

10:30-11:30 Long-pulse steady-state shots in the 3.55 m configuration (U. Wenzel (IPP), G. Motojima),Ar
11:30-11:33 NBI calib. (1 shot)
11:33-11:43 [Change of Mag. Config.: 3.55 m, 2.7887 T --> 3.53 m, 2.8045 T]
11:43-12:47 Long-pulse steady-state shots in the 3.53 m configuration (U. Wenzel (IPP), G. Motojima)
12:47-12:50 NBI calib. (1 shot)
12:50-13:00 [Change of Mag. Config.: 3.53 m, 2.8045 T --> 3.6 m, 2.75 T, Change of Seq.: 3 min --> 3 min 30
sec]
13:00-13:50 Exposure of material samples into the LHD edge plasma by means of the sample manipulator(C.P. Dhard (IPP), S. Masuzaki)
13:50-13:53 NBI calib. (1 shot)
13:53-14:18 [Change of Mag. Config.: 3.6 m, 2.75 T --> 3.85 m, 2.5714 T]
14:18-16:36 Development of steady-state detachment scenarios at LHD (M. Jakubowski (IPP), M. Kobayashi)
16:36-16:45 NBI calib. (3 shots)
Sequence:3min, 3min30s#1
2
34
5Option✓Polarity
CCW
CCW
CCW
CCW
CCW

22Rax(m)
3.55
3.53
3.6
3.85
3.9Bax(T)2.78872.80452.75
2.57142.5385gamma
1.25381.25381.25381.25381.2538

Bq(%)
100.0
100.0
100.0
100.0
100.0

Subcooled

Wall Conditioning

GD(Before Exp.): None , GD(After Exp.): He , Cryopump(During Exp.): off
Remarks(MAP)
10:30-12:47 4s NBI, Balmer series spectroscopy, Divertor Langmuir probes
13:00-13:50 4s NBI, Sample manipulator, CXS
14:18-16:36 4s NBI, LID# After 13:00, plasma will exist from 0.25 or 0.3 s until around 13 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:728) Mag. Conf.: 3.55 m =< Rax < 3.6 m(id:731) Mag. Conf.: Using LID coil
(id:733) High plasma current exp. (100 kA =< Ip < 150kA) (Combined)(id:751) Mag. Conf.: Rax ＝ 3.5, 3.53 m(id:760) Insertion of sample, etc: Exposure of a material sample to divertor plasma by the manipulators

LHD projectPrepared byDaily Schedule

A.Shimizu

DateExperimental Subject

2024/6/12(Wed)

Impurity transport, Effect of magnetic shear, Real-time plasma control

Exp. No.

Experimental Session Group1379

TC89Time Table

10Session Coordinator

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

12131415

1617181920

Gas[TC](10:30 ～ 16:45) ECH, NBI
10:30-12:30 Study on the effect of magnetic shear on mode structure and associated turbulent
transport (Y. Kishimoto (Kyoto U.), K. Tanaka)# NBI calib.(3 shots) will be done between 10:30 and 12:30.
12:30-13:50 Effect of the electric field on impurity transport (T. Ido (Kyushu U.), A .Shimizu)
13:50-14:25 [Change of Mag. Config.:3.75m, 1.375T -> 3.6m, 2.75T]
14:25-15:35 Real-time plasma control using turbulence level signal (H. Sakai (Kyushu U.), K. Tanaka)
15:35-16:45 Real-time plasma control under low-turbulence conditions focusing on turbulent transition(T. Kinoshita (Kyushu U.), K. Tanaka)
Sequence:3min

OptionPolarity
CW
CW

Rax(m)
3.75
3.6Bax(T)
1.375
2.75

22

DN

[TC]

Details and Experimental Conditions

#1221

gamma
1.25381.2538

Bq(%)
100.0
100.0

Subcooled

Wall Conditioning

GD(Before Exp.): He , GD(After Exp.): None , Cryopump(During Exp.): onRemarks(TC)
5s NBI
TS, CXS, ECE, HIBP, MSE, PCI, real-time TS【Precautions for today's LHD experiments】(id:724) Impurity gas puff
(id:733) High plasma current exp. (100 kA =< Ip < 150kA) (Combined)(id:734) Probe: HDLP Probe access near LCFS
(id:752) NBI: Injection into the discharges with low fields

H2,Ne,ArLHD projectPrepared byDaily Schedule

N.Tamura

Date

Experimental Subject2024/6/13(Thu)The relation between plasma confinement and edge neutral particle, Sustainmentof divertor detachment by using feedback control impurity seeding, Plasma
modification and supplemental wall conditioning through lithium granuleintroduction

Exp. No.

Experimental Session Group1380

MAP
89Time Table

10Session Coordinator

M.Kobayashi[2169] / G.Motojima[2142]
11UP

12

13

14

15

16

1718

1920

21

22

D
N

[MAP]

Details and Experimental Conditions

Gas[MAP](10:30 ～ 16:45) ECH, NBI

H2,N2,Ne,Ar

10:30-11:30 The relation between plasma confinement and edge neutral particle (G. Motojima)
11:30-11:45 [Change of Mag. Config.: 3.55m, 2.7887T -> 3.65m, 2.7123T]
11:45-13:25 Sustainment of divertor detachment by using feedback control impurity seeding (S. Masuzaki)
11:30-11:45 [Change of Mag. Config.: 3.65m, 2.7123T -> 3.60m, 2.75T, Change of Discharge Sequence: 3min -> 3 min 30 sec]
13:40-15:40 Plasma modification and supplemental wall conditioning through lithium granuleintroduction（R. Lunsford(PPPL), S. Masuzaki）# NBI calib. (3 shots) will be done between 13:40 and 15:40.
11:30-11:45 [Change of Mag. Config.: 3.60m, 2.75T -> 3.55m, 2.7887T, Change of Discharge Sequence: 3min 30 sec -> 3 min]
15:55-16:45 The relation between plasma confinement and edge neutral particle (G. Motojima)[ !!! Tightening at 3.6 m, 2.75 T before settling to 3.55 m, 2.7887 T !!! ]Sequence:3min, 3min30s#12
34Option

Polarity
CW
CW
CW
CW

Rax(m)
3.55
3.65
3.6
3.55

Bax(T)
2.78872.71232.75
2.7887gamma
1.25381.25381.25381.2538

Bq(%)
100.0
100.0
100.0
100.0

Subcooled

Wall Conditioning

GD(Before Exp.): None , GD(After Exp.): He , Cryopump(During Exp.): onRemarks[ Additional work in the initial experimental mag. config. start-up. See experimental details and conditions above. The
addition will shorten the transition time to Rax=3.65 m and Bax=2.7123 T. ](MAP)# Note: Adjust the cooling start time so the diverter cryo-pump is off (80 K) until 11:30 and on (20 K) from 13:30.
5 s NBI, Gas-puff feedback control, LID (1/1 island cancel)IPD(Li), CBS, CTS, VUV/EUV spectrometers, Divertor VIS spectrometer, Filter camera, Bolometers, Divertor Langmuirprobes, IR cameras【Precautions for today's LHD experiments】(id:724) Impurity gas puff
(id:728) Mag. Conf.: 3.55 m =< Rax < 3.6 m(id:731) Mag. Conf.: Using LID coil
(id:733) High plasma current exp. (100 kA =< Ip < 150kA) (Combined)(id:745) ECH: Collective Thomson Scattering (CTS) measurement(id:762) Impurity powder dropper

LHD projectPrepared byDaily ScheduleN.Tamura

Date

Experimental Subject

2024/6/14(Fri)Study of MHD equilibrium, global stability and transport phenomena inan LHD plasma with zero rotational transform layer/Real-time plasma
control/Effect of boron powder injection on density limit

Exp. No.

Experimental Session Group1381

TC89Time Table

Session Coordinator

T.kobayashi[2231] / H.Nakano[2209]

10111213U
P

14

15

16

1718

1920Gas[TC](10:30 ～ 16:45) ECH, NBI
10:30-12:10 Study of MHD equilibrium, global stability and transport phenomena in LHD plasmas withzero rotational transform layer (K. Toi(ex. NIFS), K. Ogawa)# NBI calib. (3 shots) will be done between 10:30 and 12:10.
12:10-12:40 [Change of Mag. Config.: 3.6m, 1.3T -> 3.6m, 2.75T]
12:40-13:55 Real-time plasma control using turbulence level signal (H. Sakai(Kyushu U.), K. Tanaka)
13:55-15:10 Real-time plasma control under low-turbulence conditions focusing on turbulent transition(T. Kinoshita(Kyushu U.), K. Tanaka)
15:10-16:45 Effect of boron powder injection on density limit (F. Nespoli(PPPL), K. Tanaka)
NBI pattern #7: (#1, #2, #3, #4, #5) – 12:45 (#1, #2, #3, #4) – 14:15 (#1, #2, #3) – 15:00 (#1, #2)
Sequence:3min

Option✓Polarity
CWCW
CW

Rax(m)
3.6
3.6
3.75

Bax(T)
1.3
2.75
2.64

22

DN

[TC]

Details and Experimental Conditions

#12
321

gamma
1.25381.25381.2538Wall Conditioning

GD(Before Exp.): He , Cryopump(During Exp.): on
Remarks(TC)
5s NBI
10:30-12:10 PCI, Crystal(Ti), HIBP, MSE, CXS(Ti, Vt, Vp, Ne)
12:40-15:10 CXS, PCI, Real-time TS
15:10-16:45 IPD(B)【Precautions for today's LHD experiments】(id:724) Impurity gas puff
(id:733) High plasma current exp. (100 kA =< Ip < 150kA) (Combined)(id:734) Probe: HDLP Probe access near LCFS
(id:752) NBI: Injection into the discharges with low fields(id:762) Impurity powder dropper

Bq(%)
100.0
100.0
100.0

Subcooled

H2,Ne,Ar