Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Progress in the development of frequency domain multiplexing for the
  X-ray Integral Field Unit on board the Athena mission   Frequency domain multiplexing (FDM) is the baseline readout system for the
X-ray Integral Field Unit (X-IFU) on board the Athena mission. Under the FDM
scheme, TESs are coupled to a passive LC filter and biased with alternating
current (AC bias) at MHz frequencies. Using high-quality factor LC filters and
room temperature electronics developed at SRON and low-noise two-stage SQUID
amplifiers provided by VTT, we have recently demonstrated good performance with
the FDM readout of Mo/Au TES calorimeters with Au/Bi absorbers. We have
achieved a performance requested for the demonstration model (DM) with the
single pixel AC bias ($\Delta E=$1.8 eV) and 9 pixel multiplexing ($\Delta
E=$2.6 eV) modes. We have also demonstrated 14-pixel multiplexing with an
average energy resolution of 3.3 eV, which is limited by non-fundamental issues
related to FDM readout in our lab setup.

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The categories of this paper are: cond-mat
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The categories of this paper are: econ
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-th
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The categories of this paper are: eess
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The categories of this paper are: math
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: physics
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The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: gr-qc
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The categories of this paper are: cmp-lg