Atom interferometry is an exciting tool to probe fundamental physics. It is considered especially apt to test the universality of free fall by using two different sorts of atoms. The increasing sensitivity required for this kind of experiment sets severe requirements on its environments, instrument control, and systematic effects. This can partially be mitigated by going to space as was proposed, for example, in the Spacetime Explorer and Quantum Equivalence Principle Space Test (STE-QUEST) mission. However, the requirements on the instrument are still very challenging. For example, the specifications of the STE-QUEST mission imply that the Feshbach coils of the atom interferometer are allowed to change their radius only by about 260 nm or 2.6 × 10−4 % due to thermal expansion although they consume an average power of 22 W. Also Earth's magnetic field has to be suppressed by a factor of 105. We show in this article that with the right design such thermal and magnetic requirements can indeed be met and that these are not an impediment for the exciting physics possible with atom interferometers in space.

1.
A.
Peters
,
K. Y.
Chung
, and
S.
Chu
, “
High-precision gravity measurements using atom interferometry
,”
Metrologia
38
,
25
(
2001
).
2.
S.
Fray
 et al, “
Atomic interferometer with amplitude gratings of light and its applications to atom based tests of the equivalence principle
,”
Phys. Rev. Lett.
93
,
240404
(
2004
).
3.
A.
Bonnin
 et al, “
Simultaneous dual-species matter-wave accelerometer
,”
Phys. Rev. A
88
,
043615
(
2013
).
4.
J. G.
Williams
,
S. G.
Turyshev
, and
D. H.
Boggs
, “
Lunar laser ranging tests of the equivalence principle
,”
Class. Quantum Grav.
29
,
184004
(
2012
).
5.
S.
Schlamminger
 et al, “
Test of the equivalence principle using a rotating torsion balance
,”
Phys. Rev. Lett.
100
,
041101
(
2008
).
6.
G.
Hechenblaikner
 et al, “
STE-QUEST mission and system design - Overview after completion of phase-A
,”
Exp. Astron.
(published online).
7.
D.
Aguilera
 et al, “
STE-QUEST - Test of the universality of free fall using cold atom interferometry
,”
Class. Quantum Grav.
31
,
115010
(
2014
);
D.
Aguilera
 et al, corrigendum,
Class. Quantum Grav.
31
,
159502
(
2014
).
8.
G. M.
Tino
 et al, “
Precision gravity tests with atom interferometry in space
,”
Nucl. Phys. B, Proc. Suppl.
243–244
,
203
(
2013
).
9.
T.
Schuldt
 et al, “
Design of a space compatible dual species atom interferometer
,” Experimental Astronomy (unpublished).
10.
C.
Schubert
 et al, “
Differential atom interferometry with 87Rb and 85Rb for testing the UFF in STE-QUEST
,” preprint arXiv:1312.5963v1 [physics.atom-ph] (
2013
).
11.
T.
van Zoest
 et al, “
Bose-Einstein condensation in microgravity
,”
Science
328
,
1540
(
2010
).
12.
R. A.
Nyman
 et al, “
I.C.E.: a transportable atomic inertial sensor for test in microgravity
,”
Appl. Phys. B
84
,
673
(
2006
).
13.
See http://www.iqo.uni-hannover.de/551.html for MAIUS - Atom-optical experiments on sounding rockets; accessed 06 January 01 2014.
14.
E. A.
Burt
and
C. R.
Ekstrom
, “
Optimal three-layer cylindrical magnetic shield sets for scientific applications
,”
Rev. Sci. Instrum.
73
,
2699
(
2002
).
15.
Ph.
Laurent
 et al, “
Design of the cold atom PHARAO space clock and initial test results
,”
Appl. Phys. B
84
,
683
(
2006
).
16.
See www.ansys.com for official website of ANSYS, Inc.; accessed 28 December
2013
.
17.
See www.techapps.com for producer of space qualified graphite fiber heat straps; accessed 28 December 2013.
18.
See www.polytron-gmbh.de/torlon-typen.aspx for data sheet of Torlon 4203 thermal isolation, accessed 28 December 2013.
19.
See https://www.zarm.uni-bremen.de/research/space-science/experimental-gravitation-and-quantum-optics/projects/primus.html for PRIMUS - precision interferometry with matter waves in zero gravity; accessed 18 July 2014.
20.
See http://www.sekels.com/en/sekels-products/mumetal-mumetall-magne-tic-shielding-and-shielding-foils/alloys/ for data sheet of MUMETALL® from Sekels GmbH; accessed 06 January 2014.
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