The Doppler Shift Spectroscopy (DSS) diagnostic is in the conceptual stage to estimate beam divergence, stripping losses, and beam uniformity of the 100 keV hydrogen Diagnostics Neutral Beam of International Thermonuclear Experimental Reactor. This DSS diagnostic is used to measure the above-mentioned parameters with an error of less than 10%. To aid the design calculations and to establish a methodology for estimation of the beam divergence, DSS measurements were carried out on the existing prototype ion source RF Operated Beam Source in India for Negative ion Research. Emissions of the fast-excited neutrals that are generated from the extracted negative ions were collected in the target tank, and the line broadening of these emissions were used for estimating beam divergence. The observed broadening is a convolution of broadenings due to beam divergence, collection optics, voltage ripple, beam focusing, and instrumental broadening. Hence, for estimating the beam divergence from the observed line broadening, a systematic line profile analysis was performed. To minimize the error in the divergence measurements, a study on error propagation in the beam divergence measurements was carried out and the error was estimated. The measurements of beam divergence were done at a constant RF power of 50 kW and a source pressure of 0.6 Pa by varying the extraction voltage from 4 kV to10 kV and the acceleration voltage from 10 kV to 15 kV. These measurements were then compared with the calorimetric divergence, and the results seemed to agree within 10%. A minimum beam divergence of ∼3° was obtained when the source was operated at an extraction voltage of ∼5 kV and at a ∼10 kV acceleration voltage, i.e., at a total applied voltage of 15 kV. This is in agreement with the values reported in experiments carried out on similar sources elsewhere.

1.
E.
Speth
,
Rep. Prog. Phys.
52
,
57
(
1989
).
2.
R.
Hemsworth
,
H.
Decamps
,
J.
Graceffa
,
B.
Schunke
,
M.
Tanaka
,
M.
Dremel
,
A.
Tanga
,
H. P. L.
De Esch
,
F.
Geli
,
J.
Milnes
,
T.
Inoue
,
D.
Marcuzzi
,
P.
Sonato
, and
P.
Zaccaria
,
Nucl. Fusion
49
,
45006
(
2009
).
3.
K.
Ikeda
,
Nucl. Fusion
50
,
14002
(
2010
).
4.
A.
Chakraborty
,
C.
Rotti
,
M.
Bandyopadhyay
,
M. J.
Singh
,
R. G.
Nair
,
S.
Shah
,
U. K.
Baruah
,
R. S.
Hemsworth
, and
B.
Schunke
,
IEEE Trans. Plasma Sci.
38
,
248
(
2010
).
5.
M.
Bandyopadhyay
,
M. J.
Singh
,
C.
Rotti
,
A.
Chakraborty
,
R. S.
Hemsworth
, and
B.
Schunke
,
IEEE Trans. Plasma Sci.
38
,
242
(
2010
).
6.
M. J.
Singh
,
M.
Bandyopadhyay
,
G.
Bansal
,
A.
Gahlaut
,
J.
Soni
,
Sunil
Kumar
,
K.
Pandya
,
K. G.
Parmar
,
J.
Sonara
,
R.
Yadav
,
A. K.
Chakraborty
,
W.
Kraus
,
B.
Heinemann
,
R.
Riedl
,
S.
Obermayer
,
C.
Martens
,
P.
Franzen
, and
U.
Fantz
,
AIP Conf. Proc.
1390
,
604
(
2011
).
7.
M.
Bandyopadhyay
,
D.
Sudhir
,
M.
Bhuyan
,
J.
Soni
,
H.
Tyagi
,
J.
Joshi
,
A.
Yadav
,
C.
Rotti
,
D.
Parmar
,
H.
Patel
,
S.
Pillai
, and
A.
Chakraborty
,
Rev. Sci. Instrum.
87
,
02B906
(
2016
).
8.
M.
von Hellermann
and
H. P.
Summers
, in
Atomic and Plasma Material Interaction Processes in Controlled Thermonuclear Fusion
, edited by
R. K.
Janev
(
Elsevier Science Publishers
,
1993
), p.
135
.
9.
M. F. M.
De Bock
,
R.
Barnsley
,
M.
von Hellermann
,
F.
Le Guern
,
Ph.
Mertens
,
A.
Zvonkov
,
S.
Tugarinov
,
R.
Narayanan
,
G.
Vyas
,
J.
Klabacha
, and
F.
Levinton
, in
82nd European Conference on Plasma Diagnostics
,
Bordeaux, France
,
18 April 2017–21 April 2017
.
10.
A.
Malaquias
,
M.
Von Hellermann
,
S.
Tugarinov
,
P.
Lotte
,
N.
Hawkes
,
M.
Kuldkepp
,
E.
Rachlew
,
A.
Gorshkov
,
C.
Walker
,
A.
Costley
, and
G.
Vayakis
,
Rev. Sci. Instrum.
75
,
3393
(
2004
).
11.
M. G.
Von Hellermann
,
R.
Barnsley
,
W.
Biel
,
E.
Delabie
,
N.
Hawkes
,
R.
Jaspers
,
D.
Johnson
,
F.
Klinkhamer
,
O.
Lischtschenko
,
O.
Marchuk
,
B.
Schunke
,
M. J.
Singh
,
B.
Snijders
,
H. P.
Summers
,
D.
Thomas
,
S.
Tugarinov
, and
P.
Vasu
,
Nucl. Instrum. Methods Phys. Res. Sect. A
623
,
720
(
2010
).
12.
W.
Biel
,
T.
Baross
,
P.
Bourauel
,
D.
Dunai
,
M.
Durkut
,
G.
Erdei
,
N.
Hawkes
,
M. V.
Hellermann
,
A.
Hogenbirk
,
R.
Jaspers
 et al,
Fusion Eng. Des.
86
,
548
(
2011
).
13.
G.
Bansal
,
A.
Gahlaut
,
J.
Soni
,
K.
Pandya
,
K. G.
Parmar
,
R.
Pandey
,
M.
Vuppugalla
,
B.
Prajapati
,
A.
Patel
,
H.
Mistery
,
A.
Chakraborty
,
M.
Bandyopadhyay
,
M. J.
Singh
,
A.
Phukan
,
R. K.
Yadav
, and
D.
Parmar
,
Fusion Eng. Des.
88
,
778
(
2013
).
14.
K.
Pandya
,
G.
Bansal
,
A.
Gahlaut
,
J.
Soni
,
R. K.
Yadav
,
V.
Mahesh
,
H.
Tyagi
,
K.
Parmar
,
H.
Mistri
,
J.
Bhagora
,
B.
Prajapati
,
K.
Patel
,
M.
Bhuyan
,
M.
Gouswami
,
M.
Bandyopadhyay
, and
A. K.
Chakraborty
,
Fusion Eng. Des.
114
,
187
(
2017
).
15.
K.
Pandya
 et al, in
5th International Symposium on Negative Ions, Beams and Sources (NIBS'16)
(
2016
).
16.
J. F.
Bonnal
,
G.
Bracco
,
C.
Breton
,
C.
De Michelis
,
J.
Druax
,
M.
Mattioli
,
R.
Oberson
, and
J.
Ramette
,
Phys. Lett. A
75
,
65
(
1979
).
17.
C. F.
Burrel
,
W. S.
Cooper
,
W. F.
Steele
, and
R. R.
Smith
,
Rev. Sci. Instrum.
51
,
1451
(
1980
).
18.
R.
Uhelmann
,
R. S.
Hemsworth
,
G.
Wang
, and
H.
Euringer
,
Rev. Sci. Instrum.
64
,
974
(
1993
).
19.
D.
Ciric
,
H. D.
Falter
, and
D. J.
Godden
, in
JET-CP(98)
(
JET Joint Undertaking
,
Abingdon
,
1998
), p.
40
.
20.
P.
Franzen
,
IPP 4/201
(
Max Plank Institute for Plasma Physics
,
Garching, Germany
,
1998
).
21.
J. H.
Kamperschroer
,
H. W.
Kugel
,
M. A.
Reale
,
S. L.
Hayes
,
G. A.
Johnson
,
J. L.
Lowrance
,
P. A.
Shah
,
P.
Sichta
,
B. W.
Sleaford
,
M. D.
Williams
, and
P. M.
Zucchino
,
Rev. Sci. Instrum.
58
,
1362
(
1987
).
22.
P.
Bharathi
and
V.
Prahlad
,
J. Appl. Phys.
107
,
123307
(
2010
).
23.
T. S.
Green
,
Plasma Phys. Controlled Fusion
30
,
1505
(
1988
).
24.
Y.
Oka
,
K.
Ikeda
,
Y.
Takeiri
,
K.
Tsumori
,
O.
Kaneko
,
K.
Nagaoka
,
M.
Osakabe
,
E.
Asano
,
T.
Kondo
,
M.
Sato
,
M.
Shibuya
,
L.
Grisham
,
N.
Umeda
,
A.
Honda
,
Y.
Ikeda
, and
T.
Yamamoto
,
Rev. Sci. Instrum.
77
,
03A538
(
2006
).
25.
H. E.
White
,
Atomic Spectra
(
McGraw-Hill
,
New York/London
,
1934
).
26.
I. D.
Williams
,
J.
Geddes
, and
H. B.
Gilbody
,
J. Phys. B: At. Mol. Phys.
15
,
1377
(
1982
).
27.
F. B.
Yousif
,
J.
Geddes
, and
H. B.
Gilbody
,
J. Phys. D: Appl. Phys.
20
,
998
1007
(
1987
).
28.
B.
Zaniol
,
R.
Pasqualotto
, and
M.
Barbisan
,
Rev. Sci. Instrum.
83
,
043117
(
2012
).
29.
J.
Joshi
,
C.
Rotti
,
M.
Bandyopadhyay
,
A.
Chakraborty
,
C.
Eckardt
,
E.
Pfaff
,
J.
Schäfer
,
A.
Metz
,
D.
Stupar
,
Y.
Wischet
, and
M.
Bush
,
Fusion Eng. Des.
123
,
366
(
2017
).
30.
P.
Franzen
,
R.
Gutser
,
U.
Fantz
,
W.
Kraus
,
H.
Falter
, and
M.
Fröschle
,
Nucl. Fusion
51
,
073035
(
2011
).
31.
H. M.
Owren
 et al, “
Effect of capacitive stored energy on neutral-beam-accelerator performance
,”
Report No. LBL-14317
, CONF-820948-5, Lawrence Berkeley Laboratory, CA, USA,
1982
.
32.
M.
Bigi
,
V.
Toigo
, and
L.
Zanotto
, “
Protections against grid breakdowns in the ITER neutral beam injector power supplies
,”
Fusion Eng. Des.
82
(
5
),
905
911
(
2007
).
33.
Y.
Okumura
,
Y.
Mizutani
,
Y.
Ohara
, and
T.
Shibata
,
Rev. Sci. Instrum.
52
,
1
(
1981
).
34.
W.
Ott
,
K.
Freudenberger
,
F. P.
Penningsfeld
,
F.
Probst
, and
R.
Suess
,
Rev. Sci. Instrum.
54
,
50
(
1983
).
35.
J. F.
Bonnal
,
G.
Bracco
,
C.
Breton
,
C. de
Michelis
,
J.
Druaux
,
M.
Mattioli
,
R.
Oberson
, and
J.
Ramette
,
J. Phys. D: Appl. Phys.
15
,
805
(
1982
).
36.
S. J.
Fielding
and
D.
Stork
,
Nucl. Fusion
22
,
617
(
1982
).
37.
G. J.
Schulz
,
J. Chem. Phys.
33
,
1661
(
1960
).
38.
R. N.
Compton
and
L. G.
Christopholou
,
Phys. Rev.
154
,
110
(
1967
).
39.
C. E.
Melton
,
J. Chem. Phys.
57
,
4218
(
1972
).
40.
Y.
Itikawa
and
N.
Mason
,
J. Phys. Chem. Ref. Data
34
,
1
(
2005
).
41.
G.
Bracco
,
C.
Breton
,
C.
de Michelis
,
M.
Mattioli
, and
J.
Ramette
,
J. Opt. Soc. Am.
71
,
1318
(
1981
).
42.
W.
Ott
and
F. P.
Penningsfeld
,
IPP4/258
(
Max Planck Institute for Plasma Physics
,
Garching, Germany
,
1993
).
43.
B.
Zaniol
,
J. Quant. Spectrosc. Radiat. Transfer
112
,
513
(
2011
).
44.
P. R.
Bevington
,
Data Reduction and Error Analysis for the Physical Sciences
(
McGraw Hill Book Company
,
1969
).
45.
J. H.
Whealton
and
J. C.
Whitson
,
Part. Accel.
10
,
235
(
1980
).
46.
I.
Langmuir
,
Phys. Rev.
2
,
450
(
1913
).
47.
C. D.
Child
,
Phys. Rev. (Ser. I)
32
,
492
(
1911
).
48.
J.
Kim
and
J.
Whealton
,
Nucl. Instrum. Methods
141
,
187
(
1977
).
49.
B.
Heinemann
,
M.
Fröschle
,
H.-D.
Falter
,
U.
Fantz
,
P.
Franzen
,
W.
Kraus
,
R.
Nocentini
,
R.
Riedl
, and
B.
Ruf
,
AIP Conf. Proc.
1655
,
060003
(
2015
).
50.
U.
Fantz
,
P.
Franzen
,
W.
Kraus
,
M.
Berger
,
S.
Christ-Koch
,
H.
Falter
,
M.
Fröschle
,
R.
Gutser
,
B.
Heinemann
,
C.
Martens
,
P.
McNeely
,
R.
Riedl
,
E.
Speth
,
A.
Stäbler
, and
D.
Wünderlich
,
Nucl. Fusion
49
,
125007
(
2009
).
51.
F.
Bonomo
,
B.
Ruf
,
M.
Barbisan
,
S.
Cristofaro
,
L.
Schiesko
,
U.
Fantz
,
P.
Franzen
,
R.
Pasqualotto
,
R.
Riedl
,
G.
Serianni
,
D.
Wünderlich
, and
NNBI-Team
,
AIP Conf. Proc.
1655
,
060009
(
2015
).
52.
R.
Maurizio
,
U.
Fantz
,
F.
Bonomo
, and
G.
Serianni
,
Nucl. Fusion
56
,
66012
(
2016
).
53.
J. R.
Taylor
,
An Introduction to Error Analysis
(
University of Science Books/Oxford University Press
,
1982
).
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