This paper presents nondestructive dark current measurements of tera electron volt energy superconducting linear accelerator cavities. The measurements were carried out in an extremely noisy accelerator environment using a low temperature dc superconducting quantum interference device based cryogenic current comparator. The overall current sensitivity under these rough conditions was measured to be 0.2 nA/Hz
$^{1/2}$
, which enables the detection of dark currents of 5 nA.REFERENCES
1.
Technical design report DESY-01-011, edited by
R.
Brinkmann
, K.
Flottmann
, J.
Rossbach
, P.
Schmueser
, N.
Walker
, and H.
Weise
, DESY, 2001
, DESY-01-011.2.
Technical design report DESY-06-097, edited by
M.
Altarelli
, R.
Brinkmann
, M.
Chergui
, W.
Decking
, B.
Dobson
, S.
Düsterer
, G.
Grübel
, W.
Graeff
, H.
Graafsma
, J.
Hajdu
, J.
Marangos
, J.
Pflüger
, H.
Redlin
, D.
Riley
, I.
Robinson
, J.
Rossbach
, A.
Schwarz
, K.
Tiedtke
, T.
Tschentscher
, I.
Vartaniants
, H.
Wabnitz
, H.
Weise
, R.
Wichmann
, K.
Witte
, A.
Wolf
, M.
Wulff
, and M.
Yurkov
, DESY, 1997, DESY-06-097.3.
R.
Brinkmann
, “Dark current issues
,” Proceeding of the TESLA Collaboration Meeting
(CEA Saclay
, Saclay, France
, 2002
).4.
W.
Vodel
, R.
Neubert
, S.
Nietzsche
, P.
Seidel
, K.
Knaack
, K.
Wittenburg
, and A.
Peters
, Supercond. Sci. Technol.
20
, 3
93 (2007
).5.
A.
Peters
, W.
Vodel
, H.
Koch
, R.
Neubert
, H.
Reeg
, and C. H.
Schroeder
, AIP Conf. Proc.
451
, 163
(1998
).6.
O.
Kugeler
, A.
Neumann
, W.
Anders
, and J.
Knobloch
, Rev. Sci. Instrum.
81
, 74701
(2010
).7.
I.
Harvey
, Rev. Sci. Instrum.
43
, 1
626 (1972
).8.
F.
Gay
, F.
Piquemal
, and G.
Geneves
, Rev. Sci. Instrum.
71
, 4592
(2000
).9.
D.
Drung
, M.
Goetz
, E.
Pesel
, J. H.
Storm
, C.
Assmann
, M.
Peters
, and T.
Schurig
, Supercond. Sci. Technol.
22
, 114004
(2009
).10.
K.
Grohmann
, H.
Hahlbohm
, D.
Hechtfischer
, and H.
Lübbig
, Cryogenics
16
, 423
(1976
).11.
K.
Grohmann
, H.
Hahlbohm
, D.
Hechtfischer
, and H.
Lübbig
, Cryogenics
16
, 601
(1976
).12.
K.
Grohmann
and D.
Hechtfischer
, Cryogenics
17
, 579
(1977
).13.
P.
Gutmann
and H.
Bachmair
, in Superconducting Quantum Electronics
, edited by V.
Kose
(Springer
, New York
, 1989
), pp. 255
–264
.14.
VACUUMSCHMELZE GmbH & Co. KG, Gruener Weg 37, D-63450 Hanau, Germany.
15.
A.
Steppke
, R.
Geithner
, S.
Hechler
, R.
Nawrodt
, R.
Neubert
, W.
Vodel
, M.
Schwickert
, H.
Reeg
, and P.
Seidel
, IEEE Trans. Appl. Supercond.
19
, 7
68 (2009
).16.
W.
Vodel
and K.
Makiniemi
, Meas. Sci. Technol.
3
, 1
155 (1992
).17.
A.
Neumann
, O.
Kugeler
, W.
Anders
, and J.
Knobloch
, Phys. Rev. ST Accel. Beams
13
, 0
82001 (2010
).© 2011 American Institute of Physics.
2011
American Institute of Physics
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