Electric field induced Lyman-α emission is a new way of measuring weak electric fields in vacuum and in a plasma. It is based on the emission of Lyman-α radiation (121.6 nm) by a low-energy metastable H atom beam due to Stark-quenching of the 2s level induced by the field. In this paper, we describe the technique in detail. Test measurements have been performed in vacuum between two plates polarized at a controlled voltage. The intensity of emitted radiation, proportional to the square of the field modulus, has been recorded by a lock-in technique, which gives an excellent signal to noise ratio. These measurements provide an in situ calibration that can be used to obtain the absolute value of the electric field. A diagnostic of this type can help to address a long standing challenge in plasma physics, namely, the problem of measuring electric fields without disturbing the equilibrium of the system that is being studied.

1.
X. Z.
Yang
 et al,
Phys. Fluids B
3
,
3448
(
1991
).
2.
S.
Ratynskaia
,
V.
Demidov
, and
K.
Rypdal
,
Phys. Plasmas
9
,
4135
(
2002
).
3.
B.
Vara
,
C. S.
Dalal
,
S.
Karkari
, and
H.
Kabariya
,
IJERA
4
,
244
(2014), see http://www.ijera.com/papers/Vol4_issue3/Version%201/AU4301244247.pdf.
4.
U.
Czarnetzki
,
D.
Luggingölscher
, and
H. F.
Döbele
,
Plasma Sources Sci. Technol.
8
,
230
(
1999
).
5.
J. P.
Booth
,
M.
Fadlallah
,
J.
Derouard
, and
N.
Sadeghi
,
Appl. Phys. Lett.
65
,
819
(
1994
).
6.
G.
Bachet
,
L.
Chérigier
,
M.
Carrère
, and
F.
Doveil
,
Phys. Fluids B
5
,
3097
(
1993
).
7.
N.
Claire
,
M.
Dindelegan
,
G.
Bachet
, and
F.
Skiff
,
Rev. Sci. Instrum.
72
,
4372
(
2001
).
8.
A. A.
Samarian
and
B. W.
James
,
Plasma Phys. Control. Fusion
47
,
B629
(
2005
).
9.
W. E.
Lamb
and
R. C.
Retherford
,
Phys. Rev.
72
,
241
(
1947
).
10.
P.
Ström
, M.S. thesis,
Université d’Aix-Marseille
,
2013
, see http://urn.kb.se/resolve?urn=urn%3Anbn%3Ase%3Auu%3Adiva-206123.
11.
A.
Lejeune
, Ph.D. thesis,
Université de Provence
,
2010
.
12.
J. F.
Benage
, Jr.
, Ph.D. thesis,
University of Colorado
,
1986
.
13.
W. E.
Lamb
and
R. C.
Retherford
,
Phys. Rev.
79
,
549
(
1950
).
14.
A.
Lejeune
,
L.
Chérigier-Kovacic
, and
F.
Doveil
,
Appl. Phys. Lett.
99
,
181502
(
2011
).
15.
R.
Limpaecher
and
K. R.
MacKenzie
,
Rev. Sci. Instrum.
44
,
726
(
1973
).
16.
Y.
Okomura
,
H.
Horiike
, and
K.
Mizuhashi
,
Rev. Sci. Instrum.
55
,
1
(
1984
).
17.
G.
Bachet
,
L.
Chérigier
, and
F.
Doveil
,
Phys. Plasmas
2
,
5
(
1995
).
18.
M.
Carrère
,
L.
Chérigier
,
C.
Arnas-Capeau
,
G.
Bachet
, and
F.
Doveil
,
Rev. Sci. Instrum.
67
,
4124
(
1996
).
19.
K. N.
Leung
,
R. D.
Collier
,
L. B.
Marshall
,
T. N.
Gallaher
,
W. H.
Ingham
,
R. E.
Kribel
, and
G. R.
Taylor
,
Rev. Sci. Instrum.
49
,
321
(
1978
).
20.
See http://www.simion.com for information about ion optics simulation.
21.
M.
Bacal
,
A.
Truc
,
H.
Doucet
,
H.
Lamain
, and
M.
Chrétien
,
Nucl. Instrum. Methods
114
,
407
(
1974
).
22.
M.
Bacal
and
W.
Reichelt
,
Rev. Sci. Instrum.
45
,
769
(
1974
).
23.
P.
Pradel
,
F.
Roussel
,
A.
Schlachter
,
G.
Spiess
, and
A.
Valance
,
Phys. Rev. A
10
,
797
(
1974
).
24.
See http://www.femm.info for homepage of Finite Element Method Magnetics for solving electrostatic problems.
25.
K. W.
Ehlers
,
K. N.
Leung
, and
M. D.
Williams
,
Rev. Sci. Instrum.
50
,
1031
(
1979
).
26.
F.
Doveil
,
A.
Lejeune
, and
L.
Chérigier-Kovacic
,
Phys. Plasmas
20
,
055701
(
2013
).
You do not currently have access to this content.