TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

1

/32

Ov

erv

iew

of

JE

T A

sy

mm

etr

ica

l

Dis

rup

tio

ns

Se

rge

i G

era

sim

ov, C

CF

E

Acknow

ledg

em

ents

to: -

Tim

Hender,

Leonid

Zakharo

v, J

am

es M

orr

is,

Vale

ria R

iccard

o,

Maxim

us T

sala

s,

Matt

eo

Baru

zzo,

Fabio

Vill

one,

Raffaele

Alb

anese,

Guglie

lmo

Ru

bin

acci, F

rancesco M

avig

lia7

.

Theory

and S

imula

tion o

f D

isru

ptions W

ork

shop

Princeto

n P

lasm

a P

hysic

s L

abora

tory

July

9-

11, 2014

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

2

/32

Ou

tlin

e

�D

iag

no

sti

cs

�S

ign

al

pro

ce

ss

ing

�D

ata

ba

se

�S

ide

wa

ys

fo

rce

, im

pu

lse

an

d v

es

se

l d

isp

lac

em

en

t

�R

ota

tio

n

�O

uts

tan

din

g i

ss

ue

s

�S

um

ma

ry a

nd

dis

cu

ss

ion

Se

e a

lso

S. N

. G

era

sim

ov e

t a

l “P

lasm

a c

urr

en

t a

sym

me

trie

s d

uri

ng

dis

rup

tio

ns

in J

ET

” N

ucl. F

usio

n 5

4 (

20

14

) 0

73

00

9 –

da

ta till

#8

37

94

(2

7/0

7/2

01

2)

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

3

/32

Ou

tlin

e

�D

iag

no

sti

cs

�S

ign

al

pro

ce

ss

ing

�D

ata

ba

se

�S

ide

wa

ys

fo

rce

, im

pu

lse

an

d v

es

se

l d

isp

lac

em

en

t

�R

ota

tio

n

�O

uts

tan

din

g i

ss

ue

s

�S

um

ma

ry a

nd

dis

cu

ss

ion

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

4

/32

Sad

dle

loop

Pic

k up

coil

a)

b)

51

3 7

OC

TA

NT

Pic

k u

p c

oils

-In

tern

al dis

cre

tecoils

(ID

C)

Saddle

loops

JG12.247-44c

Ma

gn

eti

c D

iag

no

sti

c (

1)

Each v

essel octa

nt

was e

quip

ped

with p

ick u

p c

oil

s (

IDC

)and

sad

dle

lo

op

s

Pla

n v

iew

of

JE

T v

essel, s

how

ing t

he t

oro

idal

locations o

f p

ick u

p c

oil

sand s

ad

dle

lo

op

s

The inte

gra

ted s

ignals

are

record

ed r

egula

rly w

ith 1

6-b

it A

DC

at 5 k

Hz

from

3/1

1/2

005 o

nw

ard

s.

(The p

lasm

a c

urr

ent

quench d

ura

tions >

10m

s)

18

Co

ils

14

Sa

dd

les

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

5

/32

Ma

gn

eti

c D

iag

no

sti

c (

2)

Inte

rna

l D

iscre

te C

oils

Ve

sse

l

Exte

rna

l S

ad

dle

s

Eig

ht

octa

nts

were

equip

ped w

ith

“id

en

tical”

set of co

ils a

nd s

ad

dle

s –

from

photo

s,

it

can b

e s

een t

hat th

ey a

re N

OT

perf

ectly identical.

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

6

/32

Ma

gn

eti

c D

iag

no

sti

c →

Cu

rre

nt

Mo

me

nts

Fir

st

Pla

sm

a C

urr

en

t

Mo

me

nt

Ca

lcu

lati

on

s

Div

ert

or

sup

po

rt s

tru

ctu

re a

nd

div

ert

or

PF

co

il ca

se

s a

re n

ot

inclu

de

d in

ca

lcu

latio

ns (

~5

% o

f Ip

at

dis

rup

tio

n),

be

ca

use

th

ere

are

no

re

liab

le m

ea

su

rem

en

ts.

It d

oe

s n

ot

aff

ect

the

asym

me

try c

alc

ula

tio

n.

Pla

sm

a C

urr

en

t

Ca

lcu

lati

on

)(

14 1

18 1

0

RRL

RRU

i

Di

Di

i

ii

pI

II

nd

BI

+−

−=

∑∑

==

ϑµ

dl

BI∫

=r

0µ

)(

lnΨ

211

4 1

14 1

18 1

0

RRL

RRL

RRU

RRU

i

Di

Di

Di

iio

i

i

ii

iIZ

Iz

Iz

In

z

rRdz

BM

+−

−

+=

∑

∑∑

=

==

πµ

ϑ

10

9

87

6

54

3

2

1

13

12

11

14

1

3

2

11

1098

7

6

4

5

18

12

13

14

15

16

17

CPS14.352-2c

Pic

k u

p C

oils S

ad

dle

loo

ps

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

7

/32

Mag

neti

c D

iag

no

sti

c –

Dia

mag

neti

c P

olo

idal

Lo

op

s

#1 a

nd #

5 o

cta

nts

equip

ped w

ith i

n-

vessel

dia

mag

neti

c p

olo

idal lo

op

s

Pla

n v

iew

of

JE

T v

essel, s

how

ing t

he t

oro

idal

locations o

f in

-vessel

dia

mag

neti

c p

olo

idal

loo

ps

CPS14.352-4c

In-

vessel

dia

gm

agnetic

polo

idal lo

op

CPS14.352-3c

In-

vessel

dia

magnetic

polo

idal lo

op

Saddle

loops

Pic

k u

p c

oils

-

Inte

rnal dis

cre

te

coils

(ID

C)

Octa

nt

3 7

15

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

8

/32

Saddle

loop

Pic

k u

pcoil

JG00.327-4c

Ra

dia

l V

es

se

l D

isp

lac

em

en

t D

iag

no

sti

c

Tra

nsd

ucers

measure

radia

l m

ovem

ent

at

vert

ical port

of

the e

ach v

essel octa

nt

with r

espect

to m

echanic

al str

uctu

re

Dis

pla

cem

ent

transducer

Dis

pla

ce

me

nt

tra

ns

du

ce

rs

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

9

/32

“H

alo

”

Dia

gn

os

tic

Sh

un

ts a

nd

Ro

go

wskii

co

ils

TF

pic

k-u

p c

oil

s

(Not

all

of th

em

are

relia

ble

)

JE

T “

Halo

” dia

gnostic w

ill n

ot

be d

iscussed in

curr

ent

pre

senta

tion

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

1

0/3

2

Ou

tlin

e

�D

iag

no

sti

cs

�S

ign

al

pro

ce

ss

ing

�D

ata

ba

se

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ide

wa

ys

fo

rce

, im

pu

lse

an

d v

es

se

l d

isp

lac

em

en

t

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ota

tio

n

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uts

tan

din

g i

ss

ue

s

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um

ma

ry a

nd

dis

cu

ss

ion

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

11

/32

•To a

void

no

ise

contr

ibuting t

o the

results, only

the trim

med

wavefo

rms w

ere

used f

or

analy

sis

Data

Pro

cessin

g –

Dealin

g w

ith

No

ise

for

the

fir

st

an

d la

st

1 m

s

win

do

w in

ord

er

to d

isre

ga

rd

sh

ort

-liv

ed

sp

ike

s;

2

15

2

37

)(

)(

pp

pp

pI

II

IIasym

−+

−=

*10

1.0

%,

5.0

kAI

II

A

asym

p

dis

pp

asym

p

≥

≥≥

*The c

onditio

ns w

ere

modifie

d c

om

pare

d

with o

ur

late

st

paper

Nucl. F

usio

n 5

4 (

2014),

where

|I p

asym

| >

20kA

“nois

e”

“

nois

e”

dis

p

asym

p

asym

pI

IA

/=

asym

metr

y

win

do

w

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

1

2/3

2

-1

-2

0.1

0

0.0

5 0

0.1

0

0.0

5 00

00.0

20.0

40.0

60.0

80.1

0-

0.0

20.1

2

Tim

e (

s)

CPS14.352-7c

Oct. 1

Oct. 3

Oct. 5

Oct. 7

JE

T P

uls

e N

o: 80823

Ip (MA) Ap asym Ap

asym

Data

Pro

cessin

g –

Deali

ng

wit

h M

ult

iple

Bu

rsts

New

co

nstr

ain

t w

as in

tro

du

ced

in

2014:

if |I p

asym| <

10kA

for

2m

s insid

e t

he

“asym

metr

y w

ind

ow

” then t

rim

med

wavefo

rms a

re f

orc

ed t

o z

ero

during t

his

inte

rval, a

s r

esult t

he “

main

asym

metr

y

tim

e w

ind

ow

”w

as invente

d.

{}

∫dt

Aasym

pmax

main

asym

metr

y

win

do

w

ori

gin

al

no

ise r

em

oved

Severa

l Ip

asym

metr

y b

urs

ts

observ

ed d

uring I

LW

dis

ruptions.

Only

the m

ain

burs

t is

used t

o

calc

ula

te t

ime-d

ependent

para

mete

rs s

uch a

s im

puls

e,

num

ber

of ro

tations e

tc.

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

1

3/3

2

Ou

tlin

e

�D

iag

no

sti

cs

�S

ign

al

pro

ce

ss

ing

�D

ata

ba

se

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ide

wa

ys

fo

rce

, im

pu

lse

an

d v

es

se

l d

isp

lac

em

en

t

�R

ota

tio

n

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uts

tan

din

g i

ss

ue

s

�S

um

ma

ry a

nd

dis

cu

ss

ion

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

1

4/3

2

I pA

sym

me

try D

isru

pti

on

Da

tab

as

e

•I p

just

befo

re d

isru

pti

on

> 1

.0M

A

•O

nly

sh

ots

wit

h 4

octa

nt

mag

neti

cs d

ata

used

fo

r an

aly

sis

•1634 J

ET

dis

rup

tio

ns f

rom

No

vem

ber

2005 u

p t

o J

an

uary

2014:

�C

-wall

:951 =

907 (

No M

GI*

) +

44 (

MG

I) d

isru

ptions in t

he r

ange

#64329 -

#79853

(03/1

1/2

005

-23/1

0/2

009)

�IL

-wall

:683

= 491 (

No M

GI)

+ 1

92 (

MG

I) d

isru

ptions in t

he r

ange

#80181 -

#85978

(09/0

9/2

011 -

10/0

1/2

014)

----

----

----

----

--

*MG

I-

Massiv

e G

as Inje

ction

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

1

5/3

2

Ou

tlin

e

�D

iag

no

sti

cs

�S

ign

al

pro

ce

ss

ing

�D

ata

ba

se

�S

ide

wa

ys

fo

rce

, im

pu

lse

an

d v

es

se

l d

isp

lac

em

en

t

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ota

tio

n

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uts

tan

din

g i

ss

ue

s

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um

ma

ry a

nd

dis

cu

ss

ion

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

1

6/3

2

Dis

rup

tio

n M

itig

ati

on

an

d S

ide

wa

ys

Fo

rce

s

DM

V s

et u

p f

or

dis

rup

tio

n s

up

pre

ssio

n:

P =

30

ba

r(∆

P≈ 1

5 b

ar)

, 9

0%

D2

+ 1

0%

Ar

To

be

su

cce

ssfu

l D

MV

mu

st

sa

tisfy

th

e f

ollo

win

g c

on

ditio

ns: ∆

P >

5b

ar,

|I p

(tD

MV)|

> 0

.7|I

pdis|, ∆

Z(t

DM

V)

< 0

.6m

2 2 1

15

0.6

0.6

1.2

1.0

0.230 03 01

JE

T P

uls

e N

o’s

:

81

56

6

81

57

0

00

00

.02

0.0

40

.06

0.0

8-

0.0

20

.10

Tim

e (

s)

CPS14.352-5c

Z(m)Ip (MA) F Noll

(MN)V (kV) P (Bar)

a)

b)

c) d)

e)

Dis

rup

tio

n

Mit

igati

on

Valv

e

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

1

7/3

2

Sid

ew

ays

Fo

rce

Im

pu

lse

De

fin

itio

ns

Sid

ew

ays

Fo

rce

Im

pu

lse

Mo

du

lus:

� � �

IZT

Noll

MB

F∆

=2π

∫=

dt

FImp

Noll2

2

IZy

IZx

asym

IZM

MM

∆+

∆=

Sid

ew

ays

Fo

rce

Dir

ec

tio

na

l Im

pu

lse

:

� � �

)(

2∫∆

=dt

MB

IZx

Tπ

∫=

dt

FImp

Noll

xx

∫=

dt

FImp

Noll

yy

)(

2∫∆

=dt

MB

IZy

Tπ

22

yx

rImp

Imp

Imp

+=

-2

-1

0.2

-0

.2-3 0

0.2

0.4 0 -40

-80

00

.02

0.0

40

.06

-0

.02

0.0

8

Tim

e (

s)

CPS14.352-12c

Oct.

1

Oct.

3

Oct.

5

Oct.

7

JE

T P

uls

e N

o:

80

82

3

Ip (MA) MIZ (MA.m)

asymMIZ (MA.m)

MIZ

5 -

MIZ

1

MIZ

7 -

MIZ

3

ϕ (π)

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

1

8/3

2

Sid

ew

ays

Fo

rce

Im

pu

lse

s

�Im

pu

lse

Mo

du

lus

is a

cri

tica

l p

ara

me

ter

in c

ase

of

mu

lti-

turn

ro

tati

on

al

mo

de

du

e t

o p

ossib

le m

ech

an

ica

l

reso

na

nce

of

the

ma

ch

ine

co

mp

on

en

ts w

ith

th

e r

ota

tin

g

asym

me

try.

It is a

po

ten

tia

lly s

eri

ou

s issu

e f

or

ITE

R,

bu

t

no

t fo

r JE

T.

�D

ire

cti

on

al

Imp

uls

eis

an

esse

ntia

l p

ara

me

ter

in c

ase

of

tra

pp

ed

(o

r lo

ck

ed

) m

od

e in

wh

ich

th

e t

oro

ida

l ro

tatio

n

ca

n s

low

do

wn

an

d r

em

ain

sta

tio

na

ry d

uri

ng

a s

ign

ific

an

t

pa

rt o

f th

e C

Qo

n a

n I

TE

R-s

ize

ma

ch

ine

. D

ire

ctio

na

l

Imp

uls

e is a

lwa

ys “

resp

on

sib

le”

for

sid

ew

ays v

esse

l

dis

pla

ce

me

nt

on

JE

T f

or

an

y r

ota

tio

na

l b

eh

avio

ur.

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

1

9/3

2

0.0

5

0.0

6

0.0

4

0.0

3

0.0

2

0.0

1 06

50

00

70

00

07

50

00

80

00

08

50

00

55

00

09

00

00

Imp(MN.s)

JE

T P

uls

e N

um

be

r

95

1 C-

wa

ll a

nd

68

3 I

L-

wa

ll d

isru

ptio

ns

IL-

wa

ll, w

/o M

GI

C-

wa

ll, w

/o M

GI

IL-

wa

ll, M

GI

C-

wa

ll, M

GI

CPS14.352-8c

Sid

ew

ays

Fo

rce

Im

pu

lse

Mo

du

lus

IZT

Noll

MB

F∆

=2π

∫=

dt

FImp

Noll

22

IZy

IZx

IZM

MM

∆+

∆=

∆

)1

(,m

aa

IBImp

ImpN

pT

==

10

0%

D2

Imp

uls

e w

as c

alc

ula

ted

fo

r m

ain

Ip

asym

me

try tim

e w

ind

ow

:

0.0

08

0.0

10

0.0

06

0.0

04

0.0

02 0

65

00

07

00

00

75

00

08

00

00

85

00

05

50

00

90

00

0

ImpN (s)

JE

T p

uls

e n

um

be

r

95

1 C-

wa

ll a

nd

68

3 I

L-

wa

ll d

isru

ptio

ns

IL-

wa

ll, w

/o M

GI

C-

wa

ll, w

/o M

GI

IL-

wa

ll, M

GI

C-

wa

ll, M

GI

CPS14.352-9c

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

2

0/3

2

JE

T V

essel R

ein

forc

em

en

ts

Ve

rtic

al p

ort

d

am

pe

rs

(19

89

)

Ma

in

ho

rizo

nta

lp

ort

re

str

ain

ts

(19

84

)

Lo

we

r m

ain

ve

rtic

al re

str

ain

ts

(19

87

)

La

teria

lsu

pp

ort

s

(19

96

)

Re

info

rcin

g

rin

gs

(19

89

)

Up

pe

r m

ain

ve

rtic

al

po

rt r

estr

ain

ts

(19

87

)

H

JG96.4

77/4

c

JG96

.477/6c

Top m

ain

vert

ical port

restr

ain

ts

Hydra

ulic

dam

pers

Main

horizonta

l port

vert

ical re

str

ain

ts

Main

horizonta

l port

late

ral re

str

ain

ts

Bottom

main

vert

ical

port

restr

ain

ts

As

a r

es

ult

of

dis

rup

tio

ns

, th

e v

ac

uu

m v

es

se

l

ca

n u

nd

erg

o a

co

mp

lex

, d

am

pe

d o

sc

illa

tio

n w

ith

a p

ea

k d

isp

lac

em

en

t in

th

e o

rde

r o

f a

few

mm

.

Th

e v

es

se

l c

an

ex

pe

rie

nc

e v

iole

nt

me

ch

an

ica

l

forc

es

in

ex

ce

ss

of

few

MN

.

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

2

1/3

2

-10

-2

1.2

0.6 0 0 2 0 -2 24 0 24

-22 0

00.1

0.2

-0.1

0.3

Tim

e (

s)

CPS14.352-6c

a)

b)

c) d)

e)

f)

Oct. 1

Oct. 5

Oct. 1

Oct. 3

Oct. 5

Oct. 7

JE

T P

uls

e N

os: 85386

Roll

(mm)

Rdsp

(mm)

Ip (MA) FNoll

(MN)

Z (m) Fz (MN)F

orc

es

an

d V

es

se

l D

isp

lac

em

en

t

Ve

rtic

al (s

win

g)

forc

ed

ue

to

m/n

= 1

/0*

Ve

ss

el ro

ll, f

= 1

3H

z

Sid

ew

ays

ve

ss

el d

isp

lac

em

en

t

du

e t

o m

/n =

1/1

*

*Oth

er

po

loid

al a

nd

to

roid

al h

arm

on

ics a

re s

up

eri

mp

ose

d to

m/n

= 1

/0 a

nd

1/1

du

rin

g

the

VD

E.

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

2

2/3

2

34 2 1 00

.01

0.0

20

.03

0.0

40

0.0

5

Rdmax (mm)

Imp

r (M

N. s

)

C-

wa

ll, 9

33

dis

rup

tion

s

ILW

, 6

78

dis

rup

tion

s

CPS14.352-10c

22

yx

rImp

Imp

Imp

+=

Rad

ial V

essel

Dis

pla

cem

en

t vs

Sid

ew

ays F

orc

e

Dir

ecti

on

al Im

pu

lses

#8

53

86 V

DE

0

-1

-2 4 2

1.5

1.0

0.5 4 200 0

00

.05

0.1

0-

0.0

50

.15

Tim

e (

s)

Rd

ma

x

Oct.

1

Oct.

3

Oct.

5

Oct.

7

JE

T P

uls

e N

o:

85

38

6

CPS14.352-11c

Ip (MA) ϕ (π) Rdsp (mm)F Noll

(MN) �JE

T s

idew

ays v

essel dis

pla

cem

ent

is c

orr

ela

ted (

pro

port

ional?

) to

the d

irectional im

puls

e e

stim

ate

d f

rom

magnetics

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

2

3/3

2

3

2

1

8

7

6

5

-0.0

4

IL-

wall

C-

wall

-0.0

4

0.0

4

0.0

4

Imp

x(M

N. s

)

Imp

y(M

N. s

)

-0.0

2

-0.0

2

0.0

2

0.0

2

4

CPS14.352-19c

Sid

ew

ays

Fo

rce

Dir

ec

tio

na

l Im

pu

lse

s

Th

ere

is

pre

ferr

ed

toro

ida

l p

ha

se

of

the

sid

ew

ay

s f

orc

e i

mp

uls

e

na

me

ly i

n #

3 -

#4

oc

tan

ts

JE

T v

esse

l to

p v

iew

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

2

4/3

2

Ou

tlin

e

�D

iag

no

sti

cs

�S

ign

al

pro

ce

ss

ing

�D

ata

ba

se

�S

ide

wa

ys

fo

rce

, im

pu

lse

an

d v

es

se

l d

isp

lac

em

en

t

�R

ota

tio

n

�O

uts

tan

din

g issu

es

�S

um

ma

ry a

nd

dis

cu

ssio

n

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

2

5/3

2

-2

.0

0.0

8

0.0

4 4 2 00

-1

.00

0.0

30

.04

0.0

50

.06

0.0

70

.02

0.0

8

Tim

e (

s)

JE

T P

uls

e N

o:

82

34

2

CPS14.352-14c

Oct.

1

Oct.

3

Oct.

5

Oct.

7

Ip (MA) Ap asym ϕ (π)

Ho

w t

he N

um

ber

of

Ro

tati

on

s w

as C

alc

ula

ted

dis

pp

pp

p

asym

pI

II

II

A/

)(

)(

2

15

2

37

−+

−=

ms

dt

AA

asym

p25.0

>=∫

Nro

tations

2.0

2.5

1.5

1.0

0.5 0

65000

70000

75000

80000

85000

60000

90000

A (ms)

JE

T P

uls

e n

um

bers

CPS14.352-13c

951 C-

wall

and 6

83 IL-

wall

dis

ruptions

IL-

wall,

w/o

MG

I

C-

wall,

w/o

MG

I

IL-

wall,

MG

I

C-

wall,

MG

I

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

2

6/3

2

0.4

0.3

0.2

0.1 0

0.5

-5

-4-

3-

2-

10

12

34

56

78

Density of occurances

68

3 d

isru

ptio

ns in

th

e r

an

ge

80

18

1-8

59

78

, IL-

wa

ll

A =

d

t >

0.2

5m

s

> 0

.5%

, 2

14

sh

ots

> 1

.0%

, 2

13

sh

ots

> 2

.0%

, 2

07

sh

ots

> 5

.0%

, 11

3 s

ho

ts

Ap

a

sym

∫Ap

a

sym

N t

urn

s

CPS14.352-18c

Nu

mb

er

of

Ro

tati

on

s

Fo

rce d

yn

am

ic a

mp

lifi

cati

on

:

1.

Ro

tati

on

occu

rs a

t n

ear

a

reso

nan

ce f

req

uen

cy

2.

Mo

re t

hen

2 p

eri

od

s t

ake

pla

ce, see J

ET

data

Re

so

na

nce

Re

so

na

nce

On J

ET, ro

tation is m

ost

com

monly

seen in

the e

lectr

on d

rift

direction

•F

or

JE

T t

he

du

ratio

n o

f th

e r

ota

tio

n is s

ho

rt

co

mp

are

d t

o r

eso

na

nce

pe

rio

d o

f th

e v

esse

l

(∼1

/(1

4–

17

Hz))

, a

nd

so

dyn

am

ic a

mp

lific

ation

is n

ot

an

issu

e.

•F

or

ITE

Rth

e s

itu

atio

n c

an

be

re

ve

rse

d (

the

du

ratio

n o

f ro

tatio

n is g

rea

ter

tha

n t

he

me

ch

an

ica

l re

so

na

nce

pe

rio

d)

ma

kin

g t

his

an

issu

e.

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

2

7/3

2

Ou

tlin

e

�D

iag

no

sti

cs

�S

ign

al

pro

ce

ss

ing

�D

ata

ba

se

�S

ide

wa

ys

fo

rce

, im

pu

lse

an

d v

es

se

l d

isp

lac

em

en

t

�R

ota

tio

n

�O

uts

tan

din

g i

ss

ue

s

�S

um

ma

ry a

nd

dis

cu

ssio

n

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

2

8/3

2

As

ym

me

try o

f P

olo

ida

l L

oo

p V

olt

ag

es

Uniform

rota

tion –

polo

idal

voltage a

sym

metr

y follo

wed

by t

oro

idal curr

ent asym

metr

y

Tripped (

locked)

mode –

rise a

nd

decay o

f polo

idal voltage

asym

metr

y (

~ p

olo

idal curr

ent ?)

-0

.5

-1

.0

-1

.5

0.1 0

-0

.1 2 1 15

10 50

-1

-2 00

00

.01

0.0

20

.03

-0

.01

0.0

4

Tim

e (

s)

JE

T P

uls

e N

o:

72

92

6

CPS14.352-15c

Ip (MA)

I p5

- I p

1

Vd

l5 -

Vd

l1

∆Ip (MA) ∆Vdl (V) ϕ (π)

Oct.

1O

ct.

3O

ct.

5O

ct.

7

-1

.0

-2

.00

.1 0

-0

.1

-0

.2 1 2 00 -1

-2

-20

0.0

20

.03

0.0

10

.04

Tim

e (

s)

JE

T P

uls

e N

o: 7

01

00

CPS14.352-16c

Ip (MA)

I p5

- I p

1

Vd

l5 -

Vd

l1

∆Ip (MA) ∆Vdl (V) ϕ (π)

Oct. 1

Oct. 3

Oct. 5

Oct. 7

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

2

9/3

2

Wh

at

is t

he R

easo

n f

or

Po

loid

al L

oo

p V

olt

ag

e

Asym

metr

y?

Bt

1.

Pla

sm

a r

adia

lly s

hifte

d b

ecause o

f

the m

/n=

1/1

(3D

effect)

;

2.

Leads t

o p

lasm

a c

ontr

action a

nd

expansio

n (

toro

idal flux

conserv

ation);

3.

Pla

sm

a c

ontr

action /

expansio

n

leads t

o v

ariation o

f to

roid

al flux

insid

e t

he v

essel;

4.

Variation o

f to

roid

al flux c

reate

s

the p

olo

idal voltage w

hic

h

genera

tes t

he p

olo

idal vessel

curr

ent.

Sim

ilar

mo

de

l ca

n b

e a

pp

lied

to

po

loid

al lo

op

vo

lta

ge

be

ha

vio

ur

du

rin

g E

LM

s(2

D e

ffe

ct)

–

wh

ere

(1

.)e

ve

nt is

be

ta d

rop

an

d r

eco

ve

ryR

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

3

0/3

2

Vessel

Po

loid

al C

urr

en

t In

du

ced

by E

LM

-

CarM

a0N

L C

od

e S

imu

lati

on

*

Verify

ing t

he C

arM

a0N

L 3

D J

ET

vessel m

odel

�T

he d

ecay t

ime o

f polo

idal curr

ents

in t

he v

essel m

odel is

slig

htly less (

30 m

s)

than in J

ET

estim

ation f

rom

TF

variation (

38-3

9 m

s);

�N

ext

ste

p –

sim

ula

te t

oro

idal flux v

ariation d

uring t

he E

LM

;

�N

ext

ste

p –

quasi 3D

asym

metr

y s

imula

tion d

uring

dis

ruption.

*F

ab

io V

illo

ne

, F

ran

ce

sc

o M

av

igli

a,

Ra

ffa

ele

Alb

an

ese

, G

ug

lie

lmo

Ru

bin

ac

ci

9

10 5

0.1 0

-0.1

-0.20

14.1

614.2

014.2

414.1

2

V

Tim

e (

s)

CPS14.352-23c

Dα (a.u.)

Vdl1

Vdl5

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

3

1/3

2

Ou

tlin

e

�D

iag

no

sti

cs

�S

ign

al

pro

ce

ss

ing

�D

ata

ba

se

�S

ide

wa

ys

fo

rce

, im

pu

lse

an

d v

es

se

l d

isp

lac

em

en

t

�R

ota

tio

n

�O

uts

tan

din

g i

ss

ue

s

�S

um

ma

ry a

nd

dis

cu

ss

ion

TS

Dm

ee

tin

g P

PP

L9

-11

Ju

ly 2

01

4

S

Ge

rasim

ov “O

ve

rvie

w o

f J

ET

asym

me

tric

al d

isru

ptio

ns”

3

2/3

2

Su

mm

ary

an

d D

iscu

ssio

n

•P

las

ma

cu

rre

nt

as

ym

me

trie

s d

uri

ng

cu

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